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Diffstat (limited to 'gdb/m3-nat.c')
| -rw-r--r-- | gdb/m3-nat.c | 4565 |
1 files changed, 0 insertions, 4565 deletions
diff --git a/gdb/m3-nat.c b/gdb/m3-nat.c deleted file mode 100644 index d01e22cdb24..00000000000 --- a/gdb/m3-nat.c +++ /dev/null @@ -1,4565 +0,0 @@ -/* Interface GDB to Mach 3.0 operating systems. - (Most) Mach 3.0 related routines live in this file. - - Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001 - Free Software Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* - * Author: Jukka Virtanen <jtv@hut.fi> - * Computing Centre - * Helsinki University of Technology - * Finland - * - * Thanks to my friends who helped with ideas and testing: - * - * Johannes Helander, Antti Louko, Tero Mononen, - * jvh@cs.hut.fi alo@hut.fi tmo@cs.hut.fi - * - * Tero Kivinen and Eamonn McManus - * kivinen@cs.hut.fi emcmanus@gr.osf.org - * - */ - -#include <stdio.h> - -#include <mach.h> -#include <servers/netname.h> -#include <servers/machid.h> -#include <mach/message.h> -#include <mach/notify.h> -#include <mach_error.h> -#include <mach/exception.h> -#include <mach/vm_attributes.h> - -#include "defs.h" -#include "inferior.h" -#include "symtab.h" -#include "value.h" -#include "language.h" -#include "target.h" -#include "gdb_wait.h" -#include "gdbcmd.h" -#include "gdbcore.h" -#include "regcache.h" - -#if 0 -#include <servers/machid_lib.h> -#else -#define MACH_TYPE_TASK 1 -#define MACH_TYPE_THREAD 2 -#endif - -/* Included only for signal names and NSIG - - * note: There are many problems in signal handling with - * gdb in Mach 3.0 in general. - */ -#include <signal.h> -#define SIG_UNKNOWN 0 /* Exception that has no matching unix signal */ - -#include <cthreads.h> - -/* This is what a cproc looks like. This is here partly because - cthread_internals.h is not a header we can just #include, partly with - an eye towards perhaps getting this to work with cross-debugging - someday. Best solution is if CMU publishes a real interface to this - stuff. */ -#define CPROC_NEXT_OFFSET 0 -#define CPROC_NEXT_SIZE (TARGET_PTR_BIT / HOST_CHAR_BIT) -#define CPROC_INCARNATION_OFFSET (CPROC_NEXT_OFFSET + CPROC_NEXT_SIZE) -#define CPROC_INCARNATION_SIZE (sizeof (cthread_t)) -#define CPROC_LIST_OFFSET (CPROC_INCARNATION_OFFSET + CPROC_INCARNATION_SIZE) -#define CPROC_LIST_SIZE (TARGET_PTR_BIT / HOST_CHAR_BIT) -#define CPROC_WAIT_OFFSET (CPROC_LIST_OFFSET + CPROC_LIST_SIZE) -#define CPROC_WAIT_SIZE (TARGET_PTR_BIT / HOST_CHAR_BIT) -#define CPROC_REPLY_OFFSET (CPROC_WAIT_OFFSET + CPROC_WAIT_SIZE) -#define CPROC_REPLY_SIZE (sizeof (mach_port_t)) -#define CPROC_CONTEXT_OFFSET (CPROC_REPLY_OFFSET + CPROC_REPLY_SIZE) -#define CPROC_CONTEXT_SIZE (TARGET_INT_BIT / HOST_CHAR_BIT) -#define CPROC_LOCK_OFFSET (CPROC_CONTEXT_OFFSET + CPROC_CONTEXT_SIZE) -#define CPROC_LOCK_SIZE (sizeof (spin_lock_t)) -#define CPROC_STATE_OFFSET (CPROC_LOCK_OFFSET + CPROC_LOCK_SIZE) -#define CPROC_STATE_SIZE (TARGET_INT_BIT / HOST_CHAR_BIT) -#define CPROC_WIRED_OFFSET (CPROC_STATE_OFFSET + CPROC_STATE_SIZE) -#define CPROC_WIRED_SIZE (sizeof (mach_port_t)) -#define CPROC_BUSY_OFFSET (CPROC_WIRED_OFFSET + CPROC_WIRED_SIZE) -#define CPROC_BUSY_SIZE (TARGET_INT_BIT / HOST_CHAR_BIT) -#define CPROC_MSG_OFFSET (CPROC_BUSY_OFFSET + CPROC_BUSY_SIZE) -#define CPROC_MSG_SIZE (sizeof (mach_msg_header_t)) -#define CPROC_BASE_OFFSET (CPROC_MSG_OFFSET + CPROC_MSG_SIZE) -#define CPROC_BASE_SIZE (TARGET_INT_BIT / HOST_CHAR_BIT) -#define CPROC_SIZE_OFFSET (CPROC_BASE_OFFSET + CPROC_BASE_SIZE) -#define CPROC_SIZE_SIZE (TARGET_INT_BIT / HOST_CHAR_BIT) -#define CPROC_SIZE (CPROC_SIZE_OFFSET + CPROC_SIZE_SIZE) - -/* Values for the state field in the cproc. */ -#define CPROC_RUNNING 0 -#define CPROC_SWITCHING 1 -#define CPROC_BLOCKED 2 -#define CPROC_CONDWAIT 4 - -/* For cproc and kernel thread mapping */ -typedef struct gdb_thread - { - mach_port_t name; - CORE_ADDR sp; - CORE_ADDR pc; - CORE_ADDR fp; - boolean_t in_emulator; - int slotid; - - /* This is for the mthreads list. It points to the cproc list. - Perhaps the two lists should be merged (or perhaps it was a mistake - to make them both use a struct gdb_thread). */ - struct gdb_thread *cproc; - - /* These are for the cproc list, which is linked through the next field - of the struct gdb_thread. */ - char raw_cproc[CPROC_SIZE]; - /* The cthread which is pointed to by the incarnation field from the - cproc. This points to the copy we've read into GDB. */ - cthread_t cthread; - /* Point back to the mthreads list. */ - int reverse_map; - struct gdb_thread *next; - } - *gdb_thread_t; - -/* - * Actions for Mach exceptions. - * - * sigmap field maps the exception to corresponding Unix signal. - * - * I do not know how to map the exception to unix signal - * if SIG_UNKNOWN is specified. - */ - -struct exception_list - { - char *name; - boolean_t forward; - boolean_t print; - int sigmap; - } -exception_map[] = -{ - { - "not_mach3_exception", FALSE, TRUE, SIG_UNKNOWN - } - , - { - "EXC_BAD_ACCESS", FALSE, TRUE, SIGSEGV - } - , - { - "EXC_BAD_INSTRUCTION", FALSE, TRUE, SIGILL - } - , - { - "EXC_ARITHMETIC", FALSE, TRUE, SIGFPE - } - , - { - "EXC_EMULATION", FALSE, TRUE, SIGEMT - } - , /* ??? */ - { - "EXC_SOFTWARE", FALSE, TRUE, SIG_UNKNOWN - } - , - { - "EXC_BREAKPOINT", FALSE, FALSE, SIGTRAP - } -}; - -/* Mach exception table size */ -int max_exception = sizeof (exception_map) / sizeof (struct exception_list) - 1; - -#define MAX_EXCEPTION max_exception - -WAITTYPE wait_status; - -/* If you define this, intercepted bsd server calls will be - * dumped while waiting the inferior to EXEC the correct - * program - */ -/* #define DUMP_SYSCALL /* debugging interceptor */ - -/* xx_debug() outputs messages if this is nonzero. - * If > 1, DUMP_SYSCALL will dump message contents. - */ -int debug_level = 0; - -/* "Temporary" debug stuff */ -void -xx_debug (char *fmt, int a, int b, int c) -{ - if (debug_level) - warning (fmt, a, b, c); -} - -/* This is in libmach.a */ -extern mach_port_t name_server_port; - -/* Set in catch_exception_raise */ -int stop_exception, stop_code, stop_subcode; -int stopped_in_exception; - -/* Thread that was the active thread when we stopped */ -thread_t stop_thread = MACH_PORT_NULL; - -char *hostname = ""; - -/* Set when task is attached or created */ -boolean_t emulator_present = FALSE; - -task_t inferior_task; -thread_t current_thread; - -/* Exception ports for inferior task */ -mach_port_t inferior_exception_port = MACH_PORT_NULL; -mach_port_t inferior_old_exception_port = MACH_PORT_NULL; - -/* task exceptions and notifications */ -mach_port_t inferior_wait_port_set = MACH_PORT_NULL; -mach_port_t our_notify_port = MACH_PORT_NULL; - -/* This is "inferior_wait_port_set" when not single stepping, and - * "singlestepped_thread_port" when we are single stepping. - * - * This is protected by a cleanup function: discard_single_step() - */ -mach_port_t currently_waiting_for = MACH_PORT_NULL; - -/* A port for external messages to gdb. - * External in the meaning that they do not come - * from the inferior_task, but rather from external - * tasks. - * - * As a debugging feature: - * A debugger debugging another debugger can stop the - * inferior debugger by the following command sequence - * (without running external programs) - * - * (top-gdb) set stop_inferior_gdb () - * (top-gdb) continue - */ -mach_port_t our_message_port = MACH_PORT_NULL; - -/* For single stepping */ -mach_port_t thread_exception_port = MACH_PORT_NULL; -mach_port_t thread_saved_exception_port = MACH_PORT_NULL; -mach_port_t singlestepped_thread_port = MACH_PORT_NULL; - -/* For machid calls */ -mach_port_t mid_server = MACH_PORT_NULL; -mach_port_t mid_auth = MACH_PORT_NULL; - -/* If gdb thinks the inferior task is not suspended, it - * must take suspend/abort the threads when it reads the state. - */ -int must_suspend_thread = 0; - -/* When single stepping, we switch the port that mach_really_wait() listens to. - * This cleanup is a guard to prevent the port set from being left to - * the singlestepped_thread_port when error() is called. - * This is nonzero only when we are single stepping. - */ -#define NULL_CLEANUP (struct cleanup *)0 -struct cleanup *cleanup_step = NULL_CLEANUP; - - -static struct target_ops m3_ops; - -static void m3_kill_inferior (); - -#if 0 -#define MACH_TYPE_EXCEPTION_PORT -1 -#endif - -/* Chain of ports to remember requested notifications. */ - -struct port_chain - { - struct port_chain *next; - mach_port_t port; - int type; - int mid; /* Now only valid with MACH_TYPE_THREAD and */ - /* MACH_TYPE_THREAD */ - }; -typedef struct port_chain *port_chain_t; - -/* Room for chain nodes comes from pchain_obstack */ -struct obstack pchain_obstack; -struct obstack *port_chain_obstack = &pchain_obstack; - -/* For thread handling */ -struct obstack Cproc_obstack; -struct obstack *cproc_obstack = &Cproc_obstack; - -/* the list of notified ports */ -port_chain_t notify_chain = (port_chain_t) NULL; - -port_chain_t -port_chain_insert (port_chain_t list, mach_port_t name, int type) -{ - kern_return_t ret; - port_chain_t new; - int mid; - - if (!MACH_PORT_VALID (name)) - return list; - - if (type == MACH_TYPE_TASK || type == MACH_TYPE_THREAD) - { - if (!MACH_PORT_VALID (mid_server)) - { - warning ("Machid server port invalid, can not map port 0x%x to MID", - name); - mid = name; - } - else - { - ret = machid_mach_register (mid_server, mid_auth, name, type, &mid); - - if (ret != KERN_SUCCESS) - { - warning ("Can not map name (0x%x) to MID with machid", name); - mid = name; - } - } - } - else - internal_error (__FILE__, __LINE__, "failed internal consistency check"); - - new = (port_chain_t) obstack_alloc (port_chain_obstack, - sizeof (struct port_chain)); - new->next = list; - new->port = name; - new->type = type; - new->mid = mid; - - return new; -} - -port_chain_t -port_chain_delete (port_chain_t list, mach_port_t elem) -{ - if (list) - if (list->port == elem) - list = list->next; - else - while (list->next) - { - if (list->next->port == elem) - list->next = list->next->next; /* GCd with obstack_free() */ - else - list = list->next; - } - return list; -} - -void -port_chain_destroy (struct obstack *ostack) -{ - obstack_free (ostack, 0); - obstack_init (ostack); -} - -port_chain_t -port_chain_member (port_chain_t list, mach_port_t elem) -{ - while (list) - { - if (list->port == elem) - return list; - list = list->next; - } - return (port_chain_t) NULL; -} - -int -map_port_name_to_mid (mach_port_t name, int type) -{ - port_chain_t elem; - - if (!MACH_PORT_VALID (name)) - return -1; - - elem = port_chain_member (notify_chain, name); - - if (elem && (elem->type == type)) - return elem->mid; - - if (elem) - return -1; - - if (!MACH_PORT_VALID (mid_server)) - { - warning ("Machid server port invalid, can not map port 0x%x to mid", - name); - return -1; - } - else - { - int mid; - kern_return_t ret; - - ret = machid_mach_register (mid_server, mid_auth, name, type, &mid); - - if (ret != KERN_SUCCESS) - { - warning ("Can not map name (0x%x) to mid with machid", name); - return -1; - } - return mid; - } -} - -/* Guard for currently_waiting_for and singlestepped_thread_port */ -static void -discard_single_step (thread_t thread) -{ - currently_waiting_for = inferior_wait_port_set; - - cleanup_step = NULL_CLEANUP; - if (MACH_PORT_VALID (thread) && MACH_PORT_VALID (singlestepped_thread_port)) - setup_single_step (thread, FALSE); -} - -setup_single_step (thread_t thread, boolean_t start_step) -{ - kern_return_t ret; - - if (!MACH_PORT_VALID (thread)) - error ("Invalid thread supplied to setup_single_step"); - else - { - mach_port_t teport; - - /* Get the current thread exception port */ - ret = thread_get_exception_port (thread, &teport); - CHK ("Getting thread's exception port", ret); - - if (start_step) - { - if (MACH_PORT_VALID (singlestepped_thread_port)) - { - warning ("Singlestepped_thread_port (0x%x) is still valid?", - singlestepped_thread_port); - singlestepped_thread_port = MACH_PORT_NULL; - } - - /* If we are already stepping this thread */ - if (MACH_PORT_VALID (teport) && teport == thread_exception_port) - { - ret = mach_port_deallocate (mach_task_self (), teport); - CHK ("Could not deallocate thread exception port", ret); - } - else - { - ret = thread_set_exception_port (thread, thread_exception_port); - CHK ("Setting exception port for thread", ret); -#if 0 - /* Insert thread exception port to wait port set */ - ret = mach_port_move_member (mach_task_self (), - thread_exception_port, - inferior_wait_port_set); - CHK ("Moving thread exception port to inferior_wait_port_set", - ret); -#endif - thread_saved_exception_port = teport; - } - - thread_trace (thread, TRUE); - - singlestepped_thread_port = thread_exception_port; - currently_waiting_for = singlestepped_thread_port; - cleanup_step = make_cleanup (discard_single_step, thread); - } - else - { - if (!MACH_PORT_VALID (teport)) - error ("Single stepped thread had an invalid exception port?"); - - if (teport != thread_exception_port) - error ("Single stepped thread had an unknown exception port?"); - - ret = mach_port_deallocate (mach_task_self (), teport); - CHK ("Couldn't deallocate thread exception port", ret); -#if 0 - /* Remove thread exception port from wait port set */ - ret = mach_port_move_member (mach_task_self (), - thread_exception_port, - MACH_PORT_NULL); - CHK ("Removing thread exception port from inferior_wait_port_set", - ret); -#endif - /* Restore thread's old exception port */ - ret = thread_set_exception_port (thread, - thread_saved_exception_port); - CHK ("Restoring stepped thread's exception port", ret); - - if (MACH_PORT_VALID (thread_saved_exception_port)) - (void) mach_port_deallocate (mach_task_self (), - thread_saved_exception_port); - - thread_trace (thread, FALSE); - - singlestepped_thread_port = MACH_PORT_NULL; - currently_waiting_for = inferior_wait_port_set; - if (cleanup_step) - discard_cleanups (cleanup_step); - } - } -} - -static -request_notify (mach_port_t name, mach_msg_id_t variant, int type) -{ - kern_return_t ret; - mach_port_t previous_port_dummy = MACH_PORT_NULL; - - if (!MACH_PORT_VALID (name)) - return; - - if (port_chain_member (notify_chain, name)) - return; - - ret = mach_port_request_notification (mach_task_self (), - name, - variant, - 1, - our_notify_port, - MACH_MSG_TYPE_MAKE_SEND_ONCE, - &previous_port_dummy); - CHK ("Serious: request_notify failed", ret); - - (void) mach_port_deallocate (mach_task_self (), - previous_port_dummy); - - notify_chain = port_chain_insert (notify_chain, name, type); -} - -reverse_msg_bits (mach_msg_header_t *msgp, int type) -{ - int rbits, lbits; - rbits = MACH_MSGH_BITS_REMOTE (msgp->msgh_bits); - lbits = type; - msgp->msgh_bits = - (msgp->msgh_bits & ~MACH_MSGH_BITS_PORTS_MASK) | - MACH_MSGH_BITS (lbits, rbits); -} - -/* On the third day He said: - - Let this be global - and then it was global. - - When creating the inferior fork, the - child code in inflow.c sets the name of the - bootstrap_port in its address space to this - variable. - - The name is transferred to our address space - with mach3_read_inferior(). - - Thou shalt not do this with - task_get_bootstrap_port() in this task, since - the name in the inferior task is different than - the one we get. - - For blessed are the meek, as they shall inherit - the address space. - */ -mach_port_t original_server_port_name = MACH_PORT_NULL; - - -/* Called from inferior after FORK but before EXEC */ -static void -m3_trace_me (void) -{ - kern_return_t ret; - - /* Get the NAME of the bootstrap port in this task - so that GDB can read it */ - ret = task_get_bootstrap_port (mach_task_self (), - &original_server_port_name); - if (ret != KERN_SUCCESS) - internal_error (__FILE__, __LINE__, "failed internal consistency check"); - ret = mach_port_deallocate (mach_task_self (), - original_server_port_name); - if (ret != KERN_SUCCESS) - internal_error (__FILE__, __LINE__, "failed internal consistency check"); - - /* Suspend this task to let the parent change my ports. - Resumed by the debugger */ - ret = task_suspend (mach_task_self ()); - if (ret != KERN_SUCCESS) - internal_error (__FILE__, __LINE__, "failed internal consistency check"); -} - -/* - * Intercept system calls to Unix server. - * After EXEC_COUNTER calls to exec(), return. - * - * Pre-assertion: Child is suspended. (Not verified) - * Post-condition: Child is suspended after EXEC_COUNTER exec() calls. - */ - -void -intercept_exec_calls (int exec_counter) -{ - int terminal_initted = 0; - - struct syscall_msg_t - { - mach_msg_header_t header; - mach_msg_type_t type; - char room[2000]; /* Enuff space */ - }; - - struct syscall_msg_t syscall_in, syscall_out; - - mach_port_t fake_server; - mach_port_t original_server_send; - mach_port_t original_exec_reply; - mach_port_t exec_reply; - mach_port_t exec_reply_send; - mach_msg_type_name_t acquired; - mach_port_t emulator_server_port_name; - struct task_basic_info info; - mach_msg_type_number_t info_count; - - kern_return_t ret; - - if (exec_counter <= 0) - return; /* We are already set up in the correct program */ - - ret = mach_port_allocate (mach_task_self (), - MACH_PORT_RIGHT_RECEIVE, - &fake_server); - CHK ("create inferior_fake_server port failed", ret); - - /* Wait for inferior_task to suspend itself */ - while (1) - { - info_count = sizeof (info); - ret = task_info (inferior_task, - TASK_BASIC_INFO, - (task_info_t) & info, - &info_count); - CHK ("Task info", ret); - - if (info.suspend_count) - break; - - /* Note that the definition of the parameter was undefined - * at the time of this writing, so I just use an `ad hoc' value. - */ - (void) swtch_pri (42); /* Universal Priority Value */ - } - - /* Read the inferior's bootstrap port name */ - if (!mach3_read_inferior (&original_server_port_name, - &original_server_port_name, - sizeof (original_server_port_name))) - error ("Can't read inferior task bootstrap port name"); - - /* @@ BUG: If more than 1 send right GDB will FAIL!!! */ - /* Should get refs, and set them back when restoring */ - /* Steal the original bsd server send right from inferior */ - ret = mach_port_extract_right (inferior_task, - original_server_port_name, - MACH_MSG_TYPE_MOVE_SEND, - &original_server_send, - &acquired); - CHK ("mach_port_extract_right (bsd server send)", ret); - - if (acquired != MACH_MSG_TYPE_PORT_SEND) - error ("Incorrect right extracted, send right to bsd server expected"); - - ret = mach_port_insert_right (inferior_task, - original_server_port_name, - fake_server, - MACH_MSG_TYPE_MAKE_SEND); - CHK ("mach_port_insert_right (fake server send)", ret); - - xx_debug ("inferior task bsd server ports set up \nfs %x, ospn %x, oss %x\n", - fake_server, - original_server_port_name, original_server_send); - - /* A receive right to the reply generated by unix server exec() request */ - ret = mach_port_allocate (mach_task_self (), - MACH_PORT_RIGHT_RECEIVE, - &exec_reply); - CHK ("create intercepted_reply_port port failed", ret); - - /* Pass this send right to Unix server so it replies to us after exec() */ - ret = mach_port_extract_right (mach_task_self (), - exec_reply, - MACH_MSG_TYPE_MAKE_SEND_ONCE, - &exec_reply_send, - &acquired); - CHK ("mach_port_extract_right (exec_reply)", ret); - - if (acquired != MACH_MSG_TYPE_PORT_SEND_ONCE) - error ("Incorrect right extracted, send once expected for exec reply"); - - ret = mach_port_move_member (mach_task_self (), - fake_server, - inferior_wait_port_set); - CHK ("Moving fake syscall port to inferior_wait_port_set", ret); - - xx_debug ("syscall fake server set up, resuming inferior\n"); - - ret = task_resume (inferior_task); - CHK ("task_resume (startup)", ret); - - /* Read requests from the inferior. - Pass directly through everything else except exec() calls. - */ - while (exec_counter > 0) - { - ret = mach_msg (&syscall_in.header, /* header */ - MACH_RCV_MSG, /* options */ - 0, /* send size */ - sizeof (struct syscall_msg_t), /* receive size */ - inferior_wait_port_set, /* receive_name */ - MACH_MSG_TIMEOUT_NONE, - MACH_PORT_NULL); - CHK ("mach_msg (intercepted sycall)", ret); - -#ifdef DUMP_SYSCALL - print_msg (&syscall_in.header); -#endif - - /* ASSERT : msgh_local_port == fake_server */ - - if (notify_server (&syscall_in.header, &syscall_out.header)) - error ("received a notify while intercepting syscalls"); - - if (syscall_in.header.msgh_id == MIG_EXEC_SYSCALL_ID) - { - xx_debug ("Received EXEC SYSCALL, counter = %d\n", exec_counter); - if (exec_counter == 1) - { - original_exec_reply = syscall_in.header.msgh_remote_port; - syscall_in.header.msgh_remote_port = exec_reply_send; - } - - if (!terminal_initted) - { - /* Now that the child has exec'd we know it has already set its - process group. On POSIX systems, tcsetpgrp will fail with - EPERM if we try it before the child's setpgid. */ - - /* Set up the "saved terminal modes" of the inferior - based on what modes we are starting it with. */ - target_terminal_init (); - - /* Install inferior's terminal modes. */ - target_terminal_inferior (); - - terminal_initted = 1; - } - - exec_counter--; - } - - syscall_in.header.msgh_local_port = syscall_in.header.msgh_remote_port; - syscall_in.header.msgh_remote_port = original_server_send; - - reverse_msg_bits (&syscall_in.header, MACH_MSG_TYPE_COPY_SEND); - - ret = mach_msg_send (&syscall_in.header); - CHK ("Forwarded syscall", ret); - } - - ret = mach_port_move_member (mach_task_self (), - fake_server, - MACH_PORT_NULL); - CHK ("Moving fake syscall out of inferior_wait_port_set", ret); - - ret = mach_port_move_member (mach_task_self (), - exec_reply, - inferior_wait_port_set); - CHK ("Moving exec_reply to inferior_wait_port_set", ret); - - ret = mach_msg (&syscall_in.header, /* header */ - MACH_RCV_MSG, /* options */ - 0, /* send size */ - sizeof (struct syscall_msg_t), /* receive size */ - inferior_wait_port_set, /* receive_name */ - MACH_MSG_TIMEOUT_NONE, - MACH_PORT_NULL); - CHK ("mach_msg (exec reply)", ret); - - ret = task_suspend (inferior_task); - CHK ("Suspending inferior after last exec", ret); - - must_suspend_thread = 0; - - xx_debug ("Received exec reply from bsd server, suspended inferior task\n"); - -#ifdef DUMP_SYSCALL - print_msg (&syscall_in.header); -#endif - - /* Message should appear as if it came from the unix server */ - syscall_in.header.msgh_local_port = MACH_PORT_NULL; - - /* and go to the inferior task original reply port */ - syscall_in.header.msgh_remote_port = original_exec_reply; - - reverse_msg_bits (&syscall_in.header, MACH_MSG_TYPE_MOVE_SEND_ONCE); - - ret = mach_msg_send (&syscall_in.header); - CHK ("Forwarding exec reply to inferior", ret); - - /* Garbage collect */ - ret = mach_port_deallocate (inferior_task, - original_server_port_name); - CHK ("deallocating fake server send right", ret); - - ret = mach_port_insert_right (inferior_task, - original_server_port_name, - original_server_send, - MACH_MSG_TYPE_MOVE_SEND); - CHK ("Restoring the original bsd server send right", ret); - - ret = mach_port_destroy (mach_task_self (), - fake_server); - fake_server = MACH_PORT_DEAD; - CHK ("mach_port_destroy (fake_server)", ret); - - ret = mach_port_destroy (mach_task_self (), - exec_reply); - exec_reply = MACH_PORT_DEAD; - CHK ("mach_port_destroy (exec_reply)", ret); - - xx_debug ("Done with exec call interception\n"); -} - -void -consume_send_rights (thread_array_t thread_list, int thread_count) -{ - int index; - - if (!thread_count) - return; - - for (index = 0; index < thread_count; index++) - { - /* Since thread kill command kills threads, don't check ret */ - (void) mach_port_deallocate (mach_task_self (), - thread_list[index]); - } -} - -/* suspend/abort/resume a thread. */ -setup_thread (mach_port_t thread, int what) -{ - kern_return_t ret; - - if (what) - { - ret = thread_suspend (thread); - CHK ("setup_thread thread_suspend", ret); - - ret = thread_abort (thread); - CHK ("setup_thread thread_abort", ret); - } - else - { - ret = thread_resume (thread); - CHK ("setup_thread thread_resume", ret); - } -} - -int -map_slot_to_mid (int slot, thread_array_t threads, int thread_count) -{ - kern_return_t ret; - int deallocate = 0; - int index; - int mid; - - if (!threads) - { - deallocate++; - ret = task_threads (inferior_task, &threads, &thread_count); - CHK ("Can not select a thread from a dead task", ret); - } - - if (slot < 0 || slot >= thread_count) - { - if (deallocate) - { - consume_send_rights (threads, thread_count); - (void) vm_deallocate (mach_task_self (), (vm_address_t) threads, - (thread_count * sizeof (mach_port_t))); - } - if (slot < 0) - error ("invalid slot number"); - else - return -(slot + 1); - } - - mid = map_port_name_to_mid (threads[slot], MACH_TYPE_THREAD); - - if (deallocate) - { - consume_send_rights (threads, thread_count); - (void) vm_deallocate (mach_task_self (), (vm_address_t) threads, - (thread_count * sizeof (mach_port_t))); - } - - return mid; -} - -static int -parse_thread_id (char *arg, int thread_count, int slots) -{ - kern_return_t ret; - int mid; - int slot; - int index; - - if (arg == 0) - return 0; - - while (*arg && (*arg == ' ' || *arg == '\t')) - arg++; - - if (!*arg) - return 0; - - /* Currently parse MID and @SLOTNUMBER */ - if (*arg != '@') - { - mid = atoi (arg); - if (mid <= 0) - error ("valid thread mid expected"); - return mid; - } - - arg++; - slot = atoi (arg); - - if (slot < 0) - error ("invalid slot number"); - - /* If you want slot numbers to remain slot numbers, set slots. - - * Well, since 0 is reserved, return the ordinal number - * of the thread rather than the slot number. Awk, this - * counts as a kludge. - */ - if (slots) - return -(slot + 1); - - if (thread_count && slot >= thread_count) - return -(slot + 1); - - mid = map_slot_to_mid (slot); - - return mid; -} - -/* THREAD_ID 0 is special; it selects the first kernel - * thread from the list (i.e. SLOTNUMBER 0) - * This is used when starting the program with 'run' or when attaching. - * - * If FLAG is 0 the context is not changed, and the registers, frame, etc - * will continue to describe the old thread. - * - * If FLAG is nonzero, really select the thread. - * If FLAG is 2, the THREAD_ID is a slotnumber instead of a mid. - * - */ -kern_return_t -select_thread (mach_port_t task, int thread_id, int flag) -{ - thread_array_t thread_list; - int thread_count; - kern_return_t ret; - int index; - thread_t new_thread = MACH_PORT_NULL; - - if (thread_id < 0) - error ("Can't select cprocs without kernel thread"); - - ret = task_threads (task, &thread_list, &thread_count); - if (ret != KERN_SUCCESS) - { - warning ("Can not select a thread from a dead task"); - m3_kill_inferior (); - return KERN_FAILURE; - } - - if (thread_count == 0) - { - /* The task can not do anything anymore, but it still - * exists as a container for memory and ports. - */ - registers_changed (); - warning ("Task %d has no threads", - map_port_name_to_mid (task, MACH_TYPE_TASK)); - current_thread = MACH_PORT_NULL; - (void) vm_deallocate (mach_task_self (), - (vm_address_t) thread_list, - (thread_count * sizeof (mach_port_t))); - return KERN_FAILURE; - } - - if (!thread_id || flag == 2) - { - /* First thread or a slotnumber */ - if (!thread_id) - new_thread = thread_list[0]; - else - { - if (thread_id < thread_count) - new_thread = thread_list[thread_id]; - else - { - (void) vm_deallocate (mach_task_self (), - (vm_address_t) thread_list, - (thread_count * sizeof (mach_port_t))); - error ("No such thread slot number : %d", thread_id); - } - } - } - else - { - for (index = 0; index < thread_count; index++) - if (thread_id == map_port_name_to_mid (thread_list[index], - MACH_TYPE_THREAD)) - { - new_thread = thread_list[index]; - index = -1; - break; - } - - if (index != -1) - error ("No thread with mid %d", thread_id); - } - - /* Notify when the selected thread dies */ - request_notify (new_thread, MACH_NOTIFY_DEAD_NAME, MACH_TYPE_THREAD); - - ret = vm_deallocate (mach_task_self (), - (vm_address_t) thread_list, - (thread_count * sizeof (mach_port_t))); - CHK ("vm_deallocate", ret); - - if (!flag) - current_thread = new_thread; - else - { -#if 0 - if (MACH_PORT_VALID (current_thread)) - { - /* Store the gdb's view of the thread we are deselecting - - * @@ I think gdb updates registers immediately when they are - * changed, so don't do this. - */ - ret = thread_abort (current_thread); - CHK ("Could not abort system calls when saving state of old thread", - ret); - target_prepare_to_store (); - target_store_registers (-1); - } -#endif - - registers_changed (); - - current_thread = new_thread; - - ret = thread_abort (current_thread); - CHK ("Could not abort system calls when selecting a thread", ret); - - stop_pc = read_pc (); - flush_cached_frames (); - - select_frame (get_current_frame (), 0); - } - - return KERN_SUCCESS; -} - -/* - * Switch to use thread named NEW_THREAD. - * Return it's MID - */ -int -switch_to_thread (thread_t new_thread) -{ - thread_t saved_thread = current_thread; - int mid; - - mid = map_port_name_to_mid (new_thread, - MACH_TYPE_THREAD); - if (mid == -1) - warning ("Can't map thread name 0x%x to mid", new_thread); - else if (select_thread (inferior_task, mid, 1) != KERN_SUCCESS) - { - if (current_thread) - current_thread = saved_thread; - error ("Could not select thread %d", mid); - } - - return mid; -} - -/* Do this in gdb after doing FORK but before STARTUP_INFERIOR. - * Note that the registers are not yet valid in the inferior task. - */ -static int -m3_trace_him (int pid) -{ - kern_return_t ret; - - push_target (&m3_ops); - - inferior_task = task_by_pid (pid); - - if (!MACH_PORT_VALID (inferior_task)) - error ("Can not map Unix pid %d to Mach task", pid); - - /* Clean up previous notifications and create new ones */ - setup_notify_port (1); - - /* When notification appears, the inferior task has died */ - request_notify (inferior_task, MACH_NOTIFY_DEAD_NAME, MACH_TYPE_TASK); - - emulator_present = have_emulator_p (inferior_task); - - /* By default, select the first thread, - * If task has no threads, gives a warning - * Does not fetch registers, since they are not yet valid. - */ - select_thread (inferior_task, 0, 0); - - inferior_exception_port = MACH_PORT_NULL; - - setup_exception_port (); - - xx_debug ("Now the debugged task is created\n"); - - /* One trap to exec the shell, one to exec the program being debugged. */ - intercept_exec_calls (2); - - return pid; -} - -setup_exception_port (void) -{ - kern_return_t ret; - - ret = mach_port_allocate (mach_task_self (), - MACH_PORT_RIGHT_RECEIVE, - &inferior_exception_port); - CHK ("mach_port_allocate", ret); - - /* add send right */ - ret = mach_port_insert_right (mach_task_self (), - inferior_exception_port, - inferior_exception_port, - MACH_MSG_TYPE_MAKE_SEND); - CHK ("mach_port_insert_right", ret); - - ret = mach_port_move_member (mach_task_self (), - inferior_exception_port, - inferior_wait_port_set); - CHK ("mach_port_move_member", ret); - - ret = task_get_special_port (inferior_task, - TASK_EXCEPTION_PORT, - &inferior_old_exception_port); - CHK ("task_get_special_port(old exc)", ret); - - ret = task_set_special_port (inferior_task, - TASK_EXCEPTION_PORT, - inferior_exception_port); - CHK ("task_set_special_port", ret); - - ret = mach_port_deallocate (mach_task_self (), - inferior_exception_port); - CHK ("mack_port_deallocate", ret); - -#if 0 - /* When notify appears, the inferior_task's exception - * port has been destroyed. - * - * Not used, since the dead_name_notification already - * appears when task dies. - * - */ - request_notify (inferior_exception_port, - MACH_NOTIFY_NO_SENDERS, - MACH_TYPE_EXCEPTION_PORT); -#endif -} - -/* Nonzero if gdb is waiting for a message */ -int mach_really_waiting; - -/* Wait for the inferior to stop for some reason. - - Loop on notifications until inferior_task dies. - - Loop on exceptions until stopped_in_exception comes true. - (e.g. we receive a single step trace trap) - - a message arrives to gdb's message port - - There is no other way to exit this loop. - - Returns the inferior_ptid for rest of gdb. - Side effects: Set *OURSTATUS. */ -ptid_t -mach_really_wait (ptid_t ptid, struct target_waitstatus *ourstatus) -{ - kern_return_t ret; - int w; - - struct msg - { - mach_msg_header_t header; - mach_msg_type_t foo; - int data[8000]; - } - in_msg, out_msg; - - /* Either notify (death), exception or message can stop the inferior */ - stopped_in_exception = FALSE; - - while (1) - { - QUIT; - - stop_exception = stop_code = stop_subcode = -1; - stop_thread = MACH_PORT_NULL; - - mach_really_waiting = 1; - ret = mach_msg (&in_msg.header, /* header */ - MACH_RCV_MSG, /* options */ - 0, /* send size */ - sizeof (struct msg), /* receive size */ - currently_waiting_for, /* receive name */ - MACH_MSG_TIMEOUT_NONE, - MACH_PORT_NULL); - mach_really_waiting = 0; - CHK ("mach_msg (receive)", ret); - - /* Check if we received a notify of the childs' death */ - if (notify_server (&in_msg.header, &out_msg.header)) - { - /* If inferior_task is null then the inferior has - gone away and we want to return to command level. - Otherwise it was just an informative message and we - need to look to see if there are any more. */ - if (inferior_task != MACH_PORT_NULL) - continue; - else - { - /* Collect Unix exit status for gdb */ - - wait3 (&w, WNOHANG, 0); - - /* This mess is here to check that the rest of - * gdb knows that the inferior died. It also - * tries to hack around the fact that Mach 3.0 (mk69) - * unix server (ux28) does not always know what - * has happened to it's children when mach-magic - * is applied on them. - */ - if ((!WIFEXITED (w) && WIFSTOPPED (w)) || - (WIFEXITED (w) && WEXITSTATUS (w) > 0377)) - { - WSETEXIT (w, 0); - warning ("Using exit value 0 for terminated task"); - } - else if (!WIFEXITED (w)) - { - int sig = WTERMSIG (w); - - /* Signals cause problems. Warn the user. */ - if (sig != SIGKILL) /* Bad luck if garbage matches this */ - warning ("The terminating signal stuff may be nonsense"); - else if (sig > NSIG) - { - WSETEXIT (w, 0); - warning ("Using exit value 0 for terminated task"); - } - } - store_waitstatus (ourstatus, w); - return inferior_ptid; - } - } - - /* Hmm. Check for exception, as it was not a notification. - exc_server() does an upcall to catch_exception_raise() - if this rpc is an exception. Further actions are decided - there. - */ - if (!exc_server (&in_msg.header, &out_msg.header)) - { - - /* Not an exception, check for message. - - * Messages don't come from the inferior, or if they - * do they better be asynchronous or it will hang. - */ - if (gdb_message_server (&in_msg.header)) - continue; - - error ("Unrecognized message received in mach_really_wait"); - } - - /* Send the reply of the exception rpc to the suspended task */ - ret = mach_msg_send (&out_msg.header); - CHK ("mach_msg_send (exc reply)", ret); - - if (stopped_in_exception) - { - /* Get unix state. May be changed in mach3_exception_actions() */ - wait3 (&w, WNOHANG, 0); - - mach3_exception_actions (&w, FALSE, "Task"); - - store_waitstatus (ourstatus, w); - return inferior_ptid; - } - } -} - -/* Called by macro DO_QUIT() in utils.c(quit). - * This is called just before calling error() to return to command level - */ -void -mach3_quit (void) -{ - int mid; - kern_return_t ret; - - if (mach_really_waiting) - { - ret = task_suspend (inferior_task); - - if (ret != KERN_SUCCESS) - { - warning ("Could not suspend task for interrupt: %s", - mach_error_string (ret)); - mach_really_waiting = 0; - return; - } - } - - must_suspend_thread = 0; - mach_really_waiting = 0; - - mid = map_port_name_to_mid (current_thread, MACH_TYPE_THREAD); - if (mid == -1) - { - warning ("Selecting first existing kernel thread"); - mid = 0; - } - - current_thread = MACH_PORT_NULL; /* Force setup */ - select_thread (inferior_task, mid, 1); - - return; -} - -#if 0 -/* bogus bogus bogus. It is NOT OK to quit out of target_wait. */ - -/* If ^C is typed when we are waiting for a message - * and your Unix server is able to notice that we - * should quit now. - * - * Called by REQUEST_QUIT() from utils.c(request_quit) - */ -void -mach3_request_quit (void) -{ - if (mach_really_waiting) - immediate_quit = 1; -} -#endif - -/* - * Gdb message server. - * Currently implemented is the STOP message, that causes - * gdb to return to the command level like ^C had been typed from terminal. - */ -int -gdb_message_server (mach_msg_header_t *InP) -{ - kern_return_t ret; - int mid; - - if (InP->msgh_local_port == our_message_port) - { - /* A message coming to our_message_port. Check validity */ - switch (InP->msgh_id) - { - - case GDB_MESSAGE_ID_STOP: - ret = task_suspend (inferior_task); - if (ret != KERN_SUCCESS) - warning ("Could not suspend task for stop message: %s", - mach_error_string (ret)); - - /* QUIT in mach_really_wait() loop. */ - request_quit (0); - break; - - default: - warning ("Invalid message id %d received, ignored.", - InP->msgh_id); - break; - } - - return 1; - } - - /* Message not handled by this server */ - return 0; -} - -/* NOTE: This is not an RPC call. It is a simpleroutine. - - * This is not called from this gdb code. - * - * It may be called by another debugger to cause this - * debugger to enter command level: - * - * (gdb) set stop_inferior_gdb () - * (gdb) continue - * - * External program "stop-gdb" implements this also. - */ -void -stop_inferior_gdb (void) -{ - kern_return_t ret; - - /* Code generated by mig, with minor cleanups :-) - - * simpleroutine stop_inferior_gdb (our_message_port : mach_port_t); - */ - - typedef struct - { - mach_msg_header_t Head; - } - Request; - - Request Mess; - - register Request *InP = &Mess; - - InP->Head.msgh_bits = MACH_MSGH_BITS (MACH_MSG_TYPE_COPY_SEND, 0); - - /* msgh_size passed as argument */ - InP->Head.msgh_remote_port = our_message_port; - InP->Head.msgh_local_port = MACH_PORT_NULL; - InP->Head.msgh_seqno = 0; - InP->Head.msgh_id = GDB_MESSAGE_ID_STOP; - - ret = mach_msg (&InP->Head, - MACH_SEND_MSG | MACH_MSG_OPTION_NONE, - sizeof (Request), - 0, - MACH_PORT_NULL, - MACH_MSG_TIMEOUT_NONE, - MACH_PORT_NULL); -} - -#ifdef THREAD_ALLOWED_TO_BREAK -/* - * Return 1 if the MID specifies the thread that caused the - * last exception. - * Since catch_exception_raise() selects the thread causing - * the last exception to current_thread, we just check that - * it is selected and the last exception was a breakpoint. - */ -int -mach_thread_for_breakpoint (int mid) -{ - int cmid = map_port_name_to_mid (current_thread, MACH_TYPE_THREAD); - - if (mid < 0) - { - mid = map_slot_to_mid (-(mid + 1), 0, 0); - if (mid < 0) - return 0; /* Don't stop, no such slot */ - } - - if (!mid || cmid == -1) - return 1; /* stop */ - - return cmid == mid && stop_exception == EXC_BREAKPOINT; -} -#endif /* THREAD_ALLOWED_TO_BREAK */ - -#ifdef THREAD_PARSE_ID -/* - * Map a thread id string (MID or a @SLOTNUMBER) - * to a thread-id. - * - * 0 matches all threads. - * Otherwise the meaning is defined only in this file. - * (mach_thread_for_breakpoint uses it) - * - * @@ This allows non-existent MIDs to be specified. - * It now also allows non-existent slots to be - * specified. (Slot numbers stored are negative, - * and the magnitude is one greater than the actual - * slot index. (Since 0 is reserved)) - */ -int -mach_thread_parse_id (char *arg) -{ - int mid; - if (arg == 0) - error ("thread id expected"); - mid = parse_thread_id (arg, 0, 1); - - return mid; -} -#endif /* THREAD_PARSE_ID */ - -#ifdef THREAD_OUTPUT_ID -char * -mach_thread_output_id (int mid) -{ - static char foobar[20]; - - if (mid > 0) - sprintf (foobar, "mid %d", mid); - else if (mid < 0) - sprintf (foobar, "@%d", -(mid + 1)); - else - sprintf (foobar, "*any thread*"); - - return foobar; -} -#endif /* THREAD_OUTPUT_ID */ - -/* Called with hook PREPARE_TO_PROCEED() from infrun.c. - - * If we have switched threads and stopped at breakpoint return 1 otherwise 0. - * - * if SELECT_IT is nonzero, reselect the thread that was active when - * we stopped at a breakpoint. - * - * Note that this implementation is potentially redundant now that - * default_prepare_to_proceed() has been added. - * - * FIXME This may not support switching threads after Ctrl-C - * correctly. The default implementation does support this. - */ - -mach3_prepare_to_proceed (int select_it) -{ - if (stop_thread && - stop_thread != current_thread && - stop_exception == EXC_BREAKPOINT) - { - int mid; - - if (!select_it) - return 1; - - mid = switch_to_thread (stop_thread); - - return 1; - } - - return 0; -} - -/* this stuff here is an upcall via libmach/excServer.c - and mach_really_wait which does the actual upcall. - - The code will pass the exception to the inferior if: - - - The task that signaled is not the inferior task - (e.g. when debugging another debugger) - - - The user has explicitely requested to pass on the exceptions. - (e.g to the default unix exception handler, which maps - exceptions to signals, or the user has her own exception handler) - - - If the thread that signaled is being single-stepped and it - has set it's own exception port and the exception is not - EXC_BREAKPOINT. (Maybe this is not desirable?) - */ - -kern_return_t -catch_exception_raise (mach_port_t port, thread_t thread, task_t task, - int exception, int code, int subcode) -{ - kern_return_t ret; - boolean_t signal_thread; - int mid = map_port_name_to_mid (thread, MACH_TYPE_THREAD); - - if (!MACH_PORT_VALID (thread)) - { - /* If the exception was sent and thread dies before we - receive it, THREAD will be MACH_PORT_DEAD - */ - - current_thread = thread = MACH_PORT_NULL; - error ("Received exception from nonexistent thread"); - } - - /* Check if the task died in transit. - * @@ Isn't the thread also invalid in such case? - */ - if (!MACH_PORT_VALID (task)) - { - current_thread = thread = MACH_PORT_NULL; - error ("Received exception from nonexistent task"); - } - - if (exception < 0 || exception > MAX_EXCEPTION) - internal_error (__FILE__, __LINE__, - "catch_exception_raise: unknown exception code %d thread %d", - exception, - mid); - - if (!MACH_PORT_VALID (inferior_task)) - error ("got an exception, but inferior_task is null or dead"); - - stop_exception = exception; - stop_code = code; - stop_subcode = subcode; - stop_thread = thread; - - signal_thread = exception != EXC_BREAKPOINT && - port == singlestepped_thread_port && - MACH_PORT_VALID (thread_saved_exception_port); - - /* If it was not our inferior or if we want to forward - * the exception to the inferior's handler, do it here - * - * Note: If you have forwarded EXC_BREAKPOINT I trust you know why. - */ - if (task != inferior_task || - signal_thread || - exception_map[exception].forward) - { - mach_port_t eport = inferior_old_exception_port; - - if (signal_thread) - { - /* - GDB now forwards the exeption to thread's original handler, - since the user propably knows what he is doing. - Give a message, though. - */ - - mach3_exception_actions ((WAITTYPE *) NULL, TRUE, "Thread"); - eport = thread_saved_exception_port; - } - - /* Send the exception to the original handler */ - ret = exception_raise (eport, - thread, - task, - exception, - code, - subcode); - - (void) mach_port_deallocate (mach_task_self (), task); - (void) mach_port_deallocate (mach_task_self (), thread); - - /* If we come here, we don't want to trace any more, since we - * will never stop for tracing anyway. - */ - discard_single_step (thread); - - /* Do not stop the inferior */ - return ret; - } - - /* Now gdb handles the exception */ - stopped_in_exception = TRUE; - - ret = task_suspend (task); - CHK ("Error suspending inferior after exception", ret); - - must_suspend_thread = 0; - - if (current_thread != thread) - { - if (MACH_PORT_VALID (singlestepped_thread_port)) - /* Cleanup discards single stepping */ - error ("Exception from thread %d while singlestepping thread %d", - mid, - map_port_name_to_mid (current_thread, MACH_TYPE_THREAD)); - - /* Then select the thread that caused the exception */ - if (select_thread (inferior_task, mid, 0) != KERN_SUCCESS) - error ("Could not select thread %d causing exception", mid); - else - warning ("Gdb selected thread %d", mid); - } - - /* If we receive an exception that is not breakpoint - * exception, we interrupt the single step and return to - * debugger. Trace condition is cleared. - */ - if (MACH_PORT_VALID (singlestepped_thread_port)) - { - if (stop_exception != EXC_BREAKPOINT) - warning ("Single step interrupted by exception"); - else if (port == singlestepped_thread_port) - { - /* Single step exception occurred, remove trace bit - * and return to gdb. - */ - if (!MACH_PORT_VALID (current_thread)) - error ("Single stepped thread is not valid"); - - /* Resume threads, but leave the task suspended */ - resume_all_threads (0); - } - else - warning ("Breakpoint while single stepping?"); - - discard_single_step (current_thread); - } - - (void) mach_port_deallocate (mach_task_self (), task); - (void) mach_port_deallocate (mach_task_self (), thread); - - return KERN_SUCCESS; -} - -int -port_valid (mach_port_t port, int mask) -{ - kern_return_t ret; - mach_port_type_t type; - - ret = mach_port_type (mach_task_self (), - port, - &type); - if (ret != KERN_SUCCESS || (type & mask) != mask) - return 0; - return 1; -} - -/* @@ No vm read cache implemented yet */ -boolean_t vm_read_cache_valid = FALSE; - -/* - * Read inferior task's LEN bytes from ADDR and copy it to MYADDR - * in gdb's address space. - * - * Return 0 on failure; number of bytes read otherwise. - */ -int -mach3_read_inferior (CORE_ADDR addr, char *myaddr, int length) -{ - kern_return_t ret; - vm_address_t low_address = (vm_address_t) trunc_page (addr); - vm_size_t aligned_length = - (vm_size_t) round_page (addr + length) - low_address; - pointer_t copied_memory; - int copy_count; - - /* Get memory from inferior with page aligned addresses */ - ret = vm_read (inferior_task, - low_address, - aligned_length, - &copied_memory, - ©_count); - if (ret != KERN_SUCCESS) - { - /* the problem is that the inferior might be killed for whatever reason - * before we go to mach_really_wait. This is one place that ought to - * catch many of those errors. - * @@ A better fix would be to make all external events to GDB - * to arrive via a SINGLE port set. (Including user input!) - */ - - if (!port_valid (inferior_task, MACH_PORT_TYPE_SEND)) - { - m3_kill_inferior (); - error ("Inferior killed (task port invalid)"); - } - else - { -#ifdef OSF - extern int errno; - /* valprint.c gives nicer format if this does not - screw it. Eamonn seems to like this, so I enable - it if OSF is defined... - */ - warning ("[read inferior %x failed: %s]", - addr, mach_error_string (ret)); - errno = 0; -#endif - return 0; - } - } - - memcpy (myaddr, (char *) addr - low_address + copied_memory, length); - - ret = vm_deallocate (mach_task_self (), - copied_memory, - copy_count); - CHK ("mach3_read_inferior vm_deallocate failed", ret); - - return length; -} - -#define CHK_GOTO_OUT(str,ret) \ - do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0) - -struct vm_region_list -{ - struct vm_region_list *next; - vm_prot_t protection; - vm_address_t start; - vm_size_t length; -}; - -struct obstack region_obstack; - -/* - * Write inferior task's LEN bytes from ADDR and copy it to MYADDR - * in gdb's address space. - */ -int -mach3_write_inferior (CORE_ADDR addr, char *myaddr, int length) -{ - kern_return_t ret; - vm_address_t low_address = (vm_address_t) trunc_page (addr); - vm_size_t aligned_length = - (vm_size_t) round_page (addr + length) - low_address; - pointer_t copied_memory; - int copy_count; - int deallocate = 0; - - char *errstr = "Bug in mach3_write_inferior"; - - struct vm_region_list *region_element; - struct vm_region_list *region_head = (struct vm_region_list *) NULL; - - /* Get memory from inferior with page aligned addresses */ - ret = vm_read (inferior_task, - low_address, - aligned_length, - &copied_memory, - ©_count); - CHK_GOTO_OUT ("mach3_write_inferior vm_read failed", ret); - - deallocate++; - - memcpy ((char *) addr - low_address + copied_memory, myaddr, length); - - obstack_init (®ion_obstack); - - /* Do writes atomically. - * First check for holes and unwritable memory. - */ - { - vm_size_t remaining_length = aligned_length; - vm_address_t region_address = low_address; - - struct vm_region_list *scan; - - while (region_address < low_address + aligned_length) - { - vm_prot_t protection; - vm_prot_t max_protection; - vm_inherit_t inheritance; - boolean_t shared; - mach_port_t object_name; - vm_offset_t offset; - vm_size_t region_length = remaining_length; - vm_address_t old_address = region_address; - - ret = vm_region (inferior_task, - ®ion_address, - ®ion_length, - &protection, - &max_protection, - &inheritance, - &shared, - &object_name, - &offset); - CHK_GOTO_OUT ("vm_region failed", ret); - - /* Check for holes in memory */ - if (old_address != region_address) - { - warning ("No memory at 0x%x. Nothing written", - old_address); - ret = KERN_SUCCESS; - length = 0; - goto out; - } - - if (!(max_protection & VM_PROT_WRITE)) - { - warning ("Memory at address 0x%x is unwritable. Nothing written", - old_address); - ret = KERN_SUCCESS; - length = 0; - goto out; - } - - /* Chain the regions for later use */ - region_element = - (struct vm_region_list *) - obstack_alloc (®ion_obstack, sizeof (struct vm_region_list)); - - region_element->protection = protection; - region_element->start = region_address; - region_element->length = region_length; - - /* Chain the regions along with protections */ - region_element->next = region_head; - region_head = region_element; - - region_address += region_length; - remaining_length = remaining_length - region_length; - } - - /* If things fail after this, we give up. - * Somebody is messing up inferior_task's mappings. - */ - - /* Enable writes to the chained vm regions */ - for (scan = region_head; scan; scan = scan->next) - { - boolean_t protection_changed = FALSE; - - if (!(scan->protection & VM_PROT_WRITE)) - { - ret = vm_protect (inferior_task, - scan->start, - scan->length, - FALSE, - scan->protection | VM_PROT_WRITE); - CHK_GOTO_OUT ("vm_protect: enable write failed", ret); - } - } - - ret = vm_write (inferior_task, - low_address, - copied_memory, - aligned_length); - CHK_GOTO_OUT ("vm_write failed", ret); - - /* Set up the original region protections, if they were changed */ - for (scan = region_head; scan; scan = scan->next) - { - boolean_t protection_changed = FALSE; - - if (!(scan->protection & VM_PROT_WRITE)) - { - ret = vm_protect (inferior_task, - scan->start, - scan->length, - FALSE, - scan->protection); - CHK_GOTO_OUT ("vm_protect: enable write failed", ret); - } - } - } - -out: - if (deallocate) - { - obstack_free (®ion_obstack, 0); - - (void) vm_deallocate (mach_task_self (), - copied_memory, - copy_count); - } - - if (ret != KERN_SUCCESS) - { - warning ("%s %s", errstr, mach_error_string (ret)); - return 0; - } - - return length; -} - -/* Return 0 on failure, number of bytes handled otherwise. TARGET is - ignored. */ -static int -m3_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, - struct target_ops *target) -{ - int result; - - if (write) - result = mach3_write_inferior (memaddr, myaddr, len); - else - result = mach3_read_inferior (memaddr, myaddr, len); - - return result; -} - - -static char * -translate_state (int state) -{ - switch (state) - { - case TH_STATE_RUNNING: - return ("R"); - case TH_STATE_STOPPED: - return ("S"); - case TH_STATE_WAITING: - return ("W"); - case TH_STATE_UNINTERRUPTIBLE: - return ("U"); - case TH_STATE_HALTED: - return ("H"); - default: - return ("?"); - } -} - -static char * -translate_cstate (int state) -{ - switch (state) - { - case CPROC_RUNNING: - return "R"; - case CPROC_SWITCHING: - return "S"; - case CPROC_BLOCKED: - return "B"; - case CPROC_CONDWAIT: - return "C"; - case CPROC_CONDWAIT | CPROC_SWITCHING: - return "CS"; - default: - return "?"; - } -} - -/* type == MACH_MSG_TYPE_COPY_SEND || type == MACH_MSG_TYPE_MAKE_SEND */ - -mach_port_t /* no mach_port_name_t found in include files. */ -map_inferior_port_name (mach_port_t inferior_name, mach_msg_type_name_t type) -{ - kern_return_t ret; - mach_msg_type_name_t acquired; - mach_port_t iport; - - ret = mach_port_extract_right (inferior_task, - inferior_name, - type, - &iport, - &acquired); - CHK ("mach_port_extract_right (map_inferior_port_name)", ret); - - if (acquired != MACH_MSG_TYPE_PORT_SEND) - error ("Incorrect right extracted, (map_inferior_port_name)"); - - ret = mach_port_deallocate (mach_task_self (), - iport); - CHK ("Deallocating mapped port (map_inferior_port_name)", ret); - - return iport; -} - -/* - * Naming convention: - * Always return user defined name if found. - * _K == A kernel thread with no matching CPROC - * _C == A cproc with no current cthread - * _t == A cthread with no user defined name - * - * The digits that follow the _names are the SLOT number of the - * kernel thread if there is such a thing, otherwise just a negation - * of the sequential number of such cprocs. - */ - -static char buf[7]; - -static char * -get_thread_name (gdb_thread_t one_cproc, int id) -{ - if (one_cproc) - if (one_cproc->cthread == NULL) - { - /* cproc not mapped to any cthread */ - sprintf (buf, "_C%d", id); - } - else if (!one_cproc->cthread->name) - { - /* cproc and cthread, but no name */ - sprintf (buf, "_t%d", id); - } - else - return (char *) (one_cproc->cthread->name); - else - { - if (id < 0) - warning ("Inconsistency in thread name id %d", id); - - /* Kernel thread without cproc */ - sprintf (buf, "_K%d", id); - } - - return buf; -} - -int -fetch_thread_info (mach_port_t task, gdb_thread_t *mthreads_out) -{ - kern_return_t ret; - thread_array_t th_table; - int th_count; - gdb_thread_t mthreads = NULL; - int index; - - ret = task_threads (task, &th_table, &th_count); - if (ret != KERN_SUCCESS) - { - warning ("Error getting inferior's thread list:%s", - mach_error_string (ret)); - m3_kill_inferior (); - return -1; - } - - mthreads = (gdb_thread_t) - obstack_alloc - (cproc_obstack, - th_count * sizeof (struct gdb_thread)); - - for (index = 0; index < th_count; index++) - { - thread_t saved_thread = MACH_PORT_NULL; - int mid; - - if (must_suspend_thread) - setup_thread (th_table[index], 1); - - if (th_table[index] != current_thread) - { - saved_thread = current_thread; - - mid = switch_to_thread (th_table[index]); - } - - mthreads[index].name = th_table[index]; - mthreads[index].cproc = NULL; /* map_cprocs_to_kernel_threads() */ - mthreads[index].in_emulator = FALSE; - mthreads[index].slotid = index; - - mthreads[index].sp = read_register (SP_REGNUM); - mthreads[index].fp = read_register (FP_REGNUM); - mthreads[index].pc = read_pc (); - - if (MACH_PORT_VALID (saved_thread)) - mid = switch_to_thread (saved_thread); - - if (must_suspend_thread) - setup_thread (th_table[index], 0); - } - - consume_send_rights (th_table, th_count); - ret = vm_deallocate (mach_task_self (), (vm_address_t) th_table, - (th_count * sizeof (mach_port_t))); - if (ret != KERN_SUCCESS) - { - warning ("Error trying to deallocate thread list : %s", - mach_error_string (ret)); - } - - *mthreads_out = mthreads; - - return th_count; -} - - -/* - * Current emulator always saves the USP on top of - * emulator stack below struct emul_stack_top stuff. - */ -CORE_ADDR -fetch_usp_from_emulator_stack (CORE_ADDR sp) -{ - CORE_ADDR stack_pointer; - - sp = (sp & ~(EMULATOR_STACK_SIZE - 1)) + - EMULATOR_STACK_SIZE - sizeof (struct emul_stack_top); - - if (mach3_read_inferior (sp, - &stack_pointer, - sizeof (CORE_ADDR)) != sizeof (CORE_ADDR)) - { - warning ("Can't read user sp from emulator stack address 0x%x", sp); - return 0; - } - - return stack_pointer; -} - -#ifdef MK67 - -/* get_emulation_vector() interface was changed after mk67 */ -#define EMUL_VECTOR_COUNT 400 /* Value does not matter too much */ - -#endif /* MK67 */ - -/* Check if the emulator exists at task's address space. - */ -boolean_t -have_emulator_p (task_t task) -{ - kern_return_t ret; -#ifndef EMUL_VECTOR_COUNT - vm_offset_t *emulation_vector; - int n; -#else - vm_offset_t emulation_vector[EMUL_VECTOR_COUNT]; - int n = EMUL_VECTOR_COUNT; -#endif - int i; - int vector_start; - - ret = task_get_emulation_vector (task, - &vector_start, -#ifndef EMUL_VECTOR_COUNT - &emulation_vector, -#else - emulation_vector, -#endif - &n); - CHK ("task_get_emulation_vector", ret); - xx_debug ("%d vectors from %d at 0x%08x\n", - n, vector_start, emulation_vector); - - for (i = 0; i < n; i++) - { - vm_offset_t entry = emulation_vector[i]; - - if (EMULATOR_BASE <= entry && entry <= EMULATOR_END) - return TRUE; - else if (entry) - { - static boolean_t informed = FALSE; - if (!informed) - { - warning ("Emulation vector address 0x08%x outside emulator space", - entry); - informed = TRUE; - } - } - } - return FALSE; -} - -/* Map cprocs to kernel threads and vice versa. */ - -void -map_cprocs_to_kernel_threads (gdb_thread_t cprocs, gdb_thread_t mthreads, - int thread_count) -{ - int index; - gdb_thread_t scan; - boolean_t all_mapped = TRUE; - LONGEST stack_base; - LONGEST stack_size; - - for (scan = cprocs; scan; scan = scan->next) - { - /* Default to: no kernel thread for this cproc */ - scan->reverse_map = -1; - - /* Check if the cproc is found by its stack */ - for (index = 0; index < thread_count; index++) - { - stack_base = - extract_signed_integer (scan->raw_cproc + CPROC_BASE_OFFSET, - CPROC_BASE_SIZE); - stack_size = - extract_signed_integer (scan->raw_cproc + CPROC_SIZE_OFFSET, - CPROC_SIZE_SIZE); - if ((mthreads + index)->sp > stack_base && - (mthreads + index)->sp <= stack_base + stack_size) - { - (mthreads + index)->cproc = scan; - scan->reverse_map = index; - break; - } - } - all_mapped &= (scan->reverse_map != -1); - } - - /* Check for threads that are currently in the emulator. - * If so, they have a different stack, and the still unmapped - * cprocs may well get mapped to these threads. - * - * If: - * - cproc stack does not match any kernel thread stack pointer - * - there is at least one extra kernel thread - * that has no cproc mapped above. - * - some kernel thread stack pointer points to emulator space - * then we find the user stack pointer saved in the emulator - * stack, and try to map that to the cprocs. - * - * Also set in_emulator for kernel threads. - */ - - if (emulator_present) - { - for (index = 0; index < thread_count; index++) - { - CORE_ADDR emul_sp; - CORE_ADDR usp; - - gdb_thread_t mthread = (mthreads + index); - emul_sp = mthread->sp; - - if (mthread->cproc == NULL && - EMULATOR_BASE <= emul_sp && emul_sp <= EMULATOR_END) - { - mthread->in_emulator = emulator_present; - - if (!all_mapped && cprocs) - { - usp = fetch_usp_from_emulator_stack (emul_sp); - - /* @@ Could be more accurate */ - if (!usp) - error ("Zero stack pointer read from emulator?"); - - /* Try to match this stack pointer to the cprocs that - * don't yet have a kernel thread. - */ - for (scan = cprocs; scan; scan = scan->next) - { - - /* Check is this unmapped CPROC stack contains - * the user stack pointer saved in the - * emulator. - */ - if (scan->reverse_map == -1) - { - stack_base = - extract_signed_integer - (scan->raw_cproc + CPROC_BASE_OFFSET, - CPROC_BASE_SIZE); - stack_size = - extract_signed_integer - (scan->raw_cproc + CPROC_SIZE_OFFSET, - CPROC_SIZE_SIZE); - if (usp > stack_base && - usp <= stack_base + stack_size) - { - mthread->cproc = scan; - scan->reverse_map = index; - break; - } - } - } - } - } - } - } -} - -/* - * Format of the thread_list command - * - * slot mid sel name emul ks susp cstate wired address - */ -#define TL_FORMAT "%-2.2s %5d%c %-10.10s %1.1s%s%-5.5s %-2.2s %-5.5s " - -#define TL_HEADER "\n@ MID Name KState CState Where\n" - -void -print_tl_address (struct ui_file *stream, CORE_ADDR pc) -{ - if (!lookup_minimal_symbol_by_pc (pc)) - fprintf_filtered (stream, local_hex_format (), pc); - else - { - extern int addressprint; - extern int asm_demangle; - - int store = addressprint; - addressprint = 0; - print_address_symbolic (pc, stream, asm_demangle, ""); - addressprint = store; - } -} - -/* For thread names, but also for gdb_message_port external name */ -#define MAX_NAME_LEN 50 - -/* Returns the address of variable NAME or 0 if not found */ -CORE_ADDR -lookup_address_of_variable (char *name) -{ - struct symbol *sym; - CORE_ADDR symaddr = 0; - struct minimal_symbol *msymbol; - - sym = lookup_symbol (name, - (struct block *) NULL, - VAR_NAMESPACE, - (int *) NULL, - (struct symtab **) NULL); - - if (sym) - symaddr = SYMBOL_VALUE (sym); - - if (!symaddr) - { - msymbol = lookup_minimal_symbol (name, NULL, NULL); - - if (msymbol && msymbol->type == mst_data) - symaddr = SYMBOL_VALUE_ADDRESS (msymbol); - } - - return symaddr; -} - -static gdb_thread_t -get_cprocs (void) -{ - gdb_thread_t cproc_head; - gdb_thread_t cproc_copy; - CORE_ADDR their_cprocs; - char *buf; - char *name; - cthread_t cthread; - CORE_ADDR symaddr; - - buf = alloca (TARGET_PTR_BIT / HOST_CHAR_BIT); - symaddr = lookup_address_of_variable ("cproc_list"); - - if (!symaddr) - { - /* cproc_list is not in a file compiled with debugging - symbols, but don't give up yet */ - - symaddr = lookup_address_of_variable ("cprocs"); - - if (symaddr) - { - static int informed = 0; - if (!informed) - { - informed++; - warning ("Your program is loaded with an old threads library."); - warning ("GDB does not know the old form of threads"); - warning ("so things may not work."); - } - } - } - - /* Stripped or no -lthreads loaded or "cproc_list" is in wrong segment. */ - if (!symaddr) - return NULL; - - /* Get the address of the first cproc in the task */ - if (!mach3_read_inferior (symaddr, - buf, - TARGET_PTR_BIT / HOST_CHAR_BIT)) - error ("Can't read cproc master list at address (0x%x).", symaddr); - their_cprocs = extract_address (buf, TARGET_PTR_BIT / HOST_CHAR_BIT); - - /* Scan the CPROCs in the task. - CPROCs are chained with LIST field, not NEXT field, which - chains mutexes, condition variables and queues */ - - cproc_head = NULL; - - while (their_cprocs != (CORE_ADDR) 0) - { - CORE_ADDR cproc_copy_incarnation; - cproc_copy = (gdb_thread_t) obstack_alloc (cproc_obstack, - sizeof (struct gdb_thread)); - - if (!mach3_read_inferior (their_cprocs, - &cproc_copy->raw_cproc[0], - CPROC_SIZE)) - error ("Can't read next cproc at 0x%x.", their_cprocs); - - their_cprocs = - extract_address (cproc_copy->raw_cproc + CPROC_LIST_OFFSET, - CPROC_LIST_SIZE); - cproc_copy_incarnation = - extract_address (cproc_copy->raw_cproc + CPROC_INCARNATION_OFFSET, - CPROC_INCARNATION_SIZE); - - if (cproc_copy_incarnation == (CORE_ADDR) 0) - cproc_copy->cthread = NULL; - else - { - /* This CPROC has an attached CTHREAD. Get its name */ - cthread = (cthread_t) obstack_alloc (cproc_obstack, - sizeof (struct cthread)); - - if (!mach3_read_inferior (cproc_copy_incarnation, - cthread, - sizeof (struct cthread))) - error ("Can't read next thread at 0x%x.", - cproc_copy_incarnation); - - cproc_copy->cthread = cthread; - - if (cthread->name) - { - name = (char *) obstack_alloc (cproc_obstack, MAX_NAME_LEN); - - if (!mach3_read_inferior (cthread->name, name, MAX_NAME_LEN)) - error ("Can't read next thread's name at 0x%x.", cthread->name); - - cthread->name = name; - } - } - - /* insert in front */ - cproc_copy->next = cproc_head; - cproc_head = cproc_copy; - } - return cproc_head; -} - -#ifndef FETCH_CPROC_STATE -/* - * Check if your machine does not grok the way this routine - * fetches the FP,PC and SP of a cproc that is not - * currently attached to any kernel thread (e.g. its cproc.context - * field points to the place in stack where the context - * is saved). - * - * If it doesn't, define your own routine. - */ -#define FETCH_CPROC_STATE(mth) mach3_cproc_state (mth) - -int -mach3_cproc_state (gdb_thread_t mthread) -{ - int context; - - if (!mthread || !mthread->cproc) - return -1; - - context = extract_signed_integer - (mthread->cproc->raw_cproc + CPROC_CONTEXT_OFFSET, - CPROC_CONTEXT_SIZE); - if (context == 0) - return -1; - - mthread->sp = context + MACHINE_CPROC_SP_OFFSET; - - if (mach3_read_inferior (context + MACHINE_CPROC_PC_OFFSET, - &mthread->pc, - sizeof (CORE_ADDR)) != sizeof (CORE_ADDR)) - { - warning ("Can't read cproc pc from inferior"); - return -1; - } - - if (mach3_read_inferior (context + MACHINE_CPROC_FP_OFFSET, - &mthread->fp, - sizeof (CORE_ADDR)) != sizeof (CORE_ADDR)) - { - warning ("Can't read cproc fp from inferior"); - return -1; - } - - return 0; -} -#endif /* FETCH_CPROC_STATE */ - - -void -thread_list_command (void) -{ - thread_basic_info_data_t ths; - int thread_count; - gdb_thread_t cprocs; - gdb_thread_t scan; - int index; - char *name; - char selected; - char *wired; - int infoCnt; - kern_return_t ret; - mach_port_t mid_or_port; - gdb_thread_t their_threads; - gdb_thread_t kthread; - - int neworder = 1; - - char *fmt = "There are %d kernel threads in task %d.\n"; - - int tmid = map_port_name_to_mid (inferior_task, MACH_TYPE_TASK); - - MACH_ERROR_NO_INFERIOR; - - thread_count = fetch_thread_info (inferior_task, - &their_threads); - if (thread_count == -1) - return; - - if (thread_count == 1) - fmt = "There is %d kernel thread in task %d.\n"; - - printf_filtered (fmt, thread_count, tmid); - - puts_filtered (TL_HEADER); - - cprocs = get_cprocs (); - - map_cprocs_to_kernel_threads (cprocs, their_threads, thread_count); - - for (scan = cprocs; scan; scan = scan->next) - { - int mid; - char buf[10]; - char slot[3]; - int cproc_state = - extract_signed_integer - (scan->raw_cproc + CPROC_STATE_OFFSET, CPROC_STATE_SIZE); - - selected = ' '; - - /* a wired cproc? */ - wired = (extract_address (scan->raw_cproc + CPROC_WIRED_OFFSET, - CPROC_WIRED_SIZE) - ? "wired" : ""); - - if (scan->reverse_map != -1) - kthread = (their_threads + scan->reverse_map); - else - kthread = NULL; - - if (kthread) - { - /* These cprocs have a kernel thread */ - - mid = map_port_name_to_mid (kthread->name, MACH_TYPE_THREAD); - - infoCnt = THREAD_BASIC_INFO_COUNT; - - ret = thread_info (kthread->name, - THREAD_BASIC_INFO, - (thread_info_t) & ths, - &infoCnt); - - if (ret != KERN_SUCCESS) - { - warning ("Unable to get basic info on thread %d : %s", - mid, - mach_error_string (ret)); - continue; - } - - /* Who is the first to have more than 100 threads */ - sprintf (slot, "%d", kthread->slotid % 100); - - if (kthread->name == current_thread) - selected = '*'; - - if (ths.suspend_count) - sprintf (buf, "%d", ths.suspend_count); - else - buf[0] = '\000'; - -#if 0 - if (ths.flags & TH_FLAGS_SWAPPED) - strcat (buf, "S"); -#endif - - if (ths.flags & TH_FLAGS_IDLE) - strcat (buf, "I"); - - printf_filtered (TL_FORMAT, - slot, - mid, - selected, - get_thread_name (scan, kthread->slotid), - kthread->in_emulator ? "E" : "", - translate_state (ths.run_state), - buf, - translate_cstate (cproc_state), - wired); - print_tl_address (gdb_stdout, kthread->pc); - } - else - { - /* These cprocs don't have a kernel thread. - * find out the calling frame with - * FETCH_CPROC_STATE. - */ - - struct gdb_thread state; - -#if 0 - /* jtv -> emcmanus: why do you want this here? */ - if (scan->incarnation == NULL) - continue; /* EMcM */ -#endif - - printf_filtered (TL_FORMAT, - "-", - -neworder, /* Pseudo MID */ - selected, - get_thread_name (scan, -neworder), - "", - "-", /* kernel state */ - "", - translate_cstate (cproc_state), - ""); - state.cproc = scan; - - if (FETCH_CPROC_STATE (&state) == -1) - puts_filtered ("???"); - else - print_tl_address (gdb_stdout, state.pc); - - neworder++; - } - puts_filtered ("\n"); - } - - /* Scan for kernel threads without cprocs */ - for (index = 0; index < thread_count; index++) - { - if (!their_threads[index].cproc) - { - int mid; - - char buf[10]; - char slot[3]; - - mach_port_t name = their_threads[index].name; - - mid = map_port_name_to_mid (name, MACH_TYPE_THREAD); - - infoCnt = THREAD_BASIC_INFO_COUNT; - - ret = thread_info (name, - THREAD_BASIC_INFO, - (thread_info_t) & ths, - &infoCnt); - - if (ret != KERN_SUCCESS) - { - warning ("Unable to get basic info on thread %d : %s", - mid, - mach_error_string (ret)); - continue; - } - - sprintf (slot, "%d", index % 100); - - if (name == current_thread) - selected = '*'; - else - selected = ' '; - - if (ths.suspend_count) - sprintf (buf, "%d", ths.suspend_count); - else - buf[0] = '\000'; - -#if 0 - if (ths.flags & TH_FLAGS_SWAPPED) - strcat (buf, "S"); -#endif - - if (ths.flags & TH_FLAGS_IDLE) - strcat (buf, "I"); - - printf_filtered (TL_FORMAT, - slot, - mid, - selected, - get_thread_name (NULL, index), - their_threads[index].in_emulator ? "E" : "", - translate_state (ths.run_state), - buf, - "", /* No cproc state */ - ""); /* Can't be wired */ - print_tl_address (gdb_stdout, their_threads[index].pc); - puts_filtered ("\n"); - } - } - - obstack_free (cproc_obstack, 0); - obstack_init (cproc_obstack); -} - -void -thread_select_command (char *args, int from_tty) -{ - int mid; - thread_array_t thread_list; - int thread_count; - kern_return_t ret; - int is_slot = 0; - - MACH_ERROR_NO_INFERIOR; - - if (!args) - error_no_arg ("MID or @SLOTNUMBER to specify a thread to select"); - - while (*args == ' ' || *args == '\t') - args++; - - if (*args == '@') - { - is_slot++; - args++; - } - - mid = atoi (args); - - if (mid == 0) - if (!is_slot || *args != '0') /* Rudimentary checks */ - error ("You must select threads by MID or @SLOTNUMBER"); - - if (select_thread (inferior_task, mid, is_slot ? 2 : 1) != KERN_SUCCESS) - return; - - if (from_tty) - printf_filtered ("Thread %d selected\n", - is_slot ? map_port_name_to_mid (current_thread, - MACH_TYPE_THREAD) : mid); -} - -thread_trace (mach_port_t thread, boolean_t set) -{ - int flavor = TRACE_FLAVOR; - unsigned int stateCnt = TRACE_FLAVOR_SIZE; - kern_return_t ret; - thread_state_data_t state; - - if (!MACH_PORT_VALID (thread)) - { - warning ("thread_trace: invalid thread"); - return; - } - - if (must_suspend_thread) - setup_thread (thread, 1); - - ret = thread_get_state (thread, flavor, state, &stateCnt); - CHK ("thread_trace: error reading thread state", ret); - - if (set) - { - TRACE_SET (thread, state); - } - else - { - if (!TRACE_CLEAR (thread, state)) - { - if (must_suspend_thread) - setup_thread (thread, 0); - return; - } - } - - ret = thread_set_state (thread, flavor, state, stateCnt); - CHK ("thread_trace: error writing thread state", ret); - if (must_suspend_thread) - setup_thread (thread, 0); -} - -#ifdef FLUSH_INFERIOR_CACHE - -/* When over-writing code on some machines the I-Cache must be flushed - explicitly, because it is not kept coherent by the lazy hardware. - This definitely includes breakpoints, for instance, or else we - end up looping in mysterious Bpt traps */ - -flush_inferior_icache (CORE_ADDR pc, int amount) -{ - vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH; - kern_return_t ret; - - ret = vm_machine_attribute (inferior_task, - pc, - amount, - MATTR_CACHE, - &flush); - if (ret != KERN_SUCCESS) - warning ("Error flushing inferior's cache : %s", - mach_error_string (ret)); -} -#endif /* FLUSH_INFERIOR_CACHE */ - - -static -suspend_all_threads (int from_tty) -{ - kern_return_t ret; - thread_array_t thread_list; - int thread_count, index; - int infoCnt; - thread_basic_info_data_t th_info; - - - ret = task_threads (inferior_task, &thread_list, &thread_count); - if (ret != KERN_SUCCESS) - { - warning ("Could not suspend inferior threads."); - m3_kill_inferior (); - return_to_top_level (RETURN_ERROR); - } - - for (index = 0; index < thread_count; index++) - { - int mid; - - mid = map_port_name_to_mid (thread_list[index], - MACH_TYPE_THREAD); - - ret = thread_suspend (thread_list[index]); - - if (ret != KERN_SUCCESS) - warning ("Error trying to suspend thread %d : %s", - mid, mach_error_string (ret)); - - if (from_tty) - { - infoCnt = THREAD_BASIC_INFO_COUNT; - ret = thread_info (thread_list[index], - THREAD_BASIC_INFO, - (thread_info_t) & th_info, - &infoCnt); - CHK ("suspend can't get thread info", ret); - - warning ("Thread %d suspend count is %d", - mid, th_info.suspend_count); - } - } - - consume_send_rights (thread_list, thread_count); - ret = vm_deallocate (mach_task_self (), - (vm_address_t) thread_list, - (thread_count * sizeof (int))); - CHK ("Error trying to deallocate thread list", ret); -} - -void -thread_suspend_command (char *args, int from_tty) -{ - kern_return_t ret; - int mid; - mach_port_t saved_thread; - int infoCnt; - thread_basic_info_data_t th_info; - - MACH_ERROR_NO_INFERIOR; - - if (!strcasecmp (args, "all")) - { - suspend_all_threads (from_tty); - return; - } - - saved_thread = current_thread; - - mid = parse_thread_id (args, 0, 0); - - if (mid < 0) - error ("You can suspend only existing kernel threads with MID or @SLOTNUMBER"); - - if (mid == 0) - mid = map_port_name_to_mid (current_thread, MACH_TYPE_THREAD); - else if (select_thread (inferior_task, mid, 0) != KERN_SUCCESS) - { - if (current_thread) - current_thread = saved_thread; - error ("Could not select thread %d", mid); - } - - ret = thread_suspend (current_thread); - if (ret != KERN_SUCCESS) - warning ("thread_suspend failed : %s", - mach_error_string (ret)); - - infoCnt = THREAD_BASIC_INFO_COUNT; - ret = thread_info (current_thread, - THREAD_BASIC_INFO, - (thread_info_t) & th_info, - &infoCnt); - CHK ("suspend can't get thread info", ret); - - warning ("Thread %d suspend count is %d", mid, th_info.suspend_count); - - current_thread = saved_thread; -} - -resume_all_threads (int from_tty) -{ - kern_return_t ret; - thread_array_t thread_list; - int thread_count, index; - int mid; - int infoCnt; - thread_basic_info_data_t th_info; - - ret = task_threads (inferior_task, &thread_list, &thread_count); - if (ret != KERN_SUCCESS) - { - m3_kill_inferior (); - error ("task_threads", mach_error_string (ret)); - } - - for (index = 0; index < thread_count; index++) - { - infoCnt = THREAD_BASIC_INFO_COUNT; - ret = thread_info (thread_list[index], - THREAD_BASIC_INFO, - (thread_info_t) & th_info, - &infoCnt); - CHK ("resume_all can't get thread info", ret); - - mid = map_port_name_to_mid (thread_list[index], - MACH_TYPE_THREAD); - - if (!th_info.suspend_count) - { - if (mid != -1 && from_tty) - warning ("Thread %d is not suspended", mid); - continue; - } - - ret = thread_resume (thread_list[index]); - - if (ret != KERN_SUCCESS) - warning ("Error trying to resume thread %d : %s", - mid, mach_error_string (ret)); - else if (mid != -1 && from_tty) - warning ("Thread %d suspend count is %d", - mid, --th_info.suspend_count); - } - - consume_send_rights (thread_list, thread_count); - ret = vm_deallocate (mach_task_self (), - (vm_address_t) thread_list, - (thread_count * sizeof (int))); - CHK ("Error trying to deallocate thread list", ret); -} - -void -thread_resume_command (char *args, int from_tty) -{ - int mid; - mach_port_t saved_thread; - kern_return_t ret; - thread_basic_info_data_t th_info; - int infoCnt = THREAD_BASIC_INFO_COUNT; - - MACH_ERROR_NO_INFERIOR; - - if (!strcasecmp (args, "all")) - { - resume_all_threads (from_tty); - return; - } - - saved_thread = current_thread; - - mid = parse_thread_id (args, 0, 0); - - if (mid < 0) - error ("You can resume only existing kernel threads with MID or @SLOTNUMBER"); - - if (mid == 0) - mid = map_port_name_to_mid (current_thread, MACH_TYPE_THREAD); - else if (select_thread (inferior_task, mid, 0) != KERN_SUCCESS) - { - if (current_thread) - current_thread = saved_thread; - return_to_top_level (RETURN_ERROR); - } - - ret = thread_info (current_thread, - THREAD_BASIC_INFO, - (thread_info_t) & th_info, - &infoCnt); - CHK ("resume can't get thread info", ret); - - if (!th_info.suspend_count) - { - warning ("Thread %d is not suspended", mid); - goto out; - } - - ret = thread_resume (current_thread); - if (ret != KERN_SUCCESS) - warning ("thread_resume failed : %s", - mach_error_string (ret)); - else - { - th_info.suspend_count--; - warning ("Thread %d suspend count is %d", mid, th_info.suspend_count); - } - -out: - current_thread = saved_thread; -} - -void -thread_kill_command (char *args, int from_tty) -{ - int mid; - kern_return_t ret; - int thread_count; - thread_array_t thread_table; - int index; - mach_port_t thread_to_kill = MACH_PORT_NULL; - - - MACH_ERROR_NO_INFERIOR; - - if (!args) - error_no_arg ("thread mid to kill from the inferior task"); - - mid = parse_thread_id (args, 0, 0); - - if (mid < 0) - error ("You can kill only existing kernel threads with MID or @SLOTNUMBER"); - - if (mid) - { - ret = machid_mach_port (mid_server, mid_auth, mid, &thread_to_kill); - CHK ("thread_kill_command: machid_mach_port map failed", ret); - } - else - mid = map_port_name_to_mid (current_thread, MACH_TYPE_THREAD); - - /* Don't allow gdb to kill *any* thread in the system. Use mkill program for that */ - ret = task_threads (inferior_task, &thread_table, &thread_count); - CHK ("Error getting inferior's thread list", ret); - - if (thread_to_kill == current_thread) - { - ret = thread_terminate (thread_to_kill); - CHK ("Thread could not be terminated", ret); - - if (select_thread (inferior_task, 0, 1) != KERN_SUCCESS) - warning ("Last thread was killed, use \"kill\" command to kill task"); - } - else - for (index = 0; index < thread_count; index++) - if (thread_table[index] == thread_to_kill) - { - ret = thread_terminate (thread_to_kill); - CHK ("Thread could not be terminated", ret); - } - - if (thread_count > 1) - consume_send_rights (thread_table, thread_count); - - ret = vm_deallocate (mach_task_self (), (vm_address_t) thread_table, - (thread_count * sizeof (mach_port_t))); - CHK ("Error trying to deallocate thread list", ret); - - warning ("Thread %d killed", mid); -} - - -/* Task specific commands; add more if you like */ - -void -task_resume_command (char *args, int from_tty) -{ - kern_return_t ret; - task_basic_info_data_t ta_info; - int infoCnt = TASK_BASIC_INFO_COUNT; - int mid = map_port_name_to_mid (inferior_task, MACH_TYPE_TASK); - - MACH_ERROR_NO_INFERIOR; - - /* Would be trivial to change, but is it desirable? */ - if (args) - error ("Currently gdb can resume only it's inferior task"); - - ret = task_info (inferior_task, - TASK_BASIC_INFO, - (task_info_t) & ta_info, - &infoCnt); - CHK ("task_resume_command: task_info failed", ret); - - if (ta_info.suspend_count == 0) - error ("Inferior task %d is not suspended", mid); - else if (ta_info.suspend_count == 1 && - from_tty && - !query ("Suspend count is now 1. Do you know what you are doing? ")) - error ("Task not resumed"); - - ret = task_resume (inferior_task); - CHK ("task_resume_command: task_resume", ret); - - if (ta_info.suspend_count == 1) - { - warning ("Inferior task %d is no longer suspended", mid); - must_suspend_thread = 1; - /* @@ This is not complete: Registers change all the time when not - suspended! */ - registers_changed (); - } - else - warning ("Inferior task %d suspend count is now %d", - mid, ta_info.suspend_count - 1); -} - - -void -task_suspend_command (char *args, int from_tty) -{ - kern_return_t ret; - task_basic_info_data_t ta_info; - int infoCnt = TASK_BASIC_INFO_COUNT; - int mid = map_port_name_to_mid (inferior_task, MACH_TYPE_TASK); - - MACH_ERROR_NO_INFERIOR; - - /* Would be trivial to change, but is it desirable? */ - if (args) - error ("Currently gdb can suspend only it's inferior task"); - - ret = task_suspend (inferior_task); - CHK ("task_suspend_command: task_suspend", ret); - - must_suspend_thread = 0; - - ret = task_info (inferior_task, - TASK_BASIC_INFO, - (task_info_t) & ta_info, - &infoCnt); - CHK ("task_suspend_command: task_info failed", ret); - - warning ("Inferior task %d suspend count is now %d", - mid, ta_info.suspend_count); -} - -static char * -get_size (int bytes) -{ - static char size[30]; - int zz = bytes / 1024; - - if (zz / 1024) - sprintf (size, "%-2.1f M", ((float) bytes) / (1024.0 * 1024.0)); - else - sprintf (size, "%d K", zz); - - return size; -} - -/* Does this require the target task to be suspended?? I don't think so. */ -void -task_info_command (char *args, int from_tty) -{ - int mid = -5; - mach_port_t task; - kern_return_t ret; - task_basic_info_data_t ta_info; - int infoCnt = TASK_BASIC_INFO_COUNT; - int page_size = round_page (1); - int thread_count = 0; - - if (MACH_PORT_VALID (inferior_task)) - mid = map_port_name_to_mid (inferior_task, - MACH_TYPE_TASK); - - task = inferior_task; - - if (args) - { - int tmid = atoi (args); - - if (tmid <= 0) - error ("Invalid mid %d for task info", tmid); - - if (tmid != mid) - { - mid = tmid; - ret = machid_mach_port (mid_server, mid_auth, tmid, &task); - CHK ("task_info_command: machid_mach_port map failed", ret); - } - } - - if (mid < 0) - error ("You have to give the task MID as an argument"); - - ret = task_info (task, - TASK_BASIC_INFO, - (task_info_t) & ta_info, - &infoCnt); - CHK ("task_info_command: task_info failed", ret); - - printf_filtered ("\nTask info for task %d:\n\n", mid); - printf_filtered (" Suspend count : %d\n", ta_info.suspend_count); - printf_filtered (" Base priority : %d\n", ta_info.base_priority); - printf_filtered (" Virtual size : %s\n", get_size (ta_info.virtual_size)); - printf_filtered (" Resident size : %s\n", get_size (ta_info.resident_size)); - - { - thread_array_t thread_list; - - ret = task_threads (task, &thread_list, &thread_count); - CHK ("task_info_command: task_threads", ret); - - printf_filtered (" Thread count : %d\n", thread_count); - - consume_send_rights (thread_list, thread_count); - ret = vm_deallocate (mach_task_self (), - (vm_address_t) thread_list, - (thread_count * sizeof (int))); - CHK ("Error trying to deallocate thread list", ret); - } - if (have_emulator_p (task)) - printf_filtered (" Emulator at : 0x%x..0x%x\n", - EMULATOR_BASE, EMULATOR_END); - else - printf_filtered (" No emulator.\n"); - - if (thread_count && task == inferior_task) - printf_filtered ("\nUse the \"thread list\" command to see the threads\n"); -} - -/* You may either FORWARD the exception to the inferior, or KEEP - * it and return to GDB command level. - * - * exception mid [ forward | keep ] - */ - -static void -exception_command (char *args, int from_tty) -{ - char *scan = args; - int exception; - int len; - - if (!args) - error_no_arg ("exception number action"); - - while (*scan == ' ' || *scan == '\t') - scan++; - - if ('0' <= *scan && *scan <= '9') - while ('0' <= *scan && *scan <= '9') - scan++; - else - error ("exception number action"); - - exception = atoi (args); - if (exception <= 0 || exception > MAX_EXCEPTION) - error ("Allowed exception numbers are in range 1..%d", - MAX_EXCEPTION); - - if (*scan != ' ' && *scan != '\t') - error ("exception number must be followed by a space"); - else - while (*scan == ' ' || *scan == '\t') - scan++; - - args = scan; - len = 0; - while (*scan) - { - len++; - scan++; - } - - if (!len) - error ("exception number action"); - - if (!strncasecmp (args, "forward", len)) - exception_map[exception].forward = TRUE; - else if (!strncasecmp (args, "keep", len)) - exception_map[exception].forward = FALSE; - else - error ("exception action is either \"keep\" or \"forward\""); -} - -static void -print_exception_info (int exception) -{ - boolean_t forward = exception_map[exception].forward; - - printf_filtered ("%s\t(%d): ", exception_map[exception].name, - exception); - if (!forward) - if (exception_map[exception].sigmap != SIG_UNKNOWN) - printf_filtered ("keep and handle as signal %d\n", - exception_map[exception].sigmap); - else - printf_filtered ("keep and handle as unknown signal %d\n", - exception_map[exception].sigmap); - else - printf_filtered ("forward exception to inferior\n"); -} - -void -exception_info (char *args, int from_tty) -{ - int exception; - - if (!args) - for (exception = 1; exception <= MAX_EXCEPTION; exception++) - print_exception_info (exception); - else - { - exception = atoi (args); - - if (exception <= 0 || exception > MAX_EXCEPTION) - error ("Invalid exception number, values from 1 to %d allowed", - MAX_EXCEPTION); - print_exception_info (exception); - } -} - -/* Check for actions for mach exceptions. - */ -mach3_exception_actions (WAITTYPE *w, boolean_t force_print_only, char *who) -{ - boolean_t force_print = FALSE; - - - if (force_print_only || - exception_map[stop_exception].sigmap == SIG_UNKNOWN) - force_print = TRUE; - else - WSETSTOP (*w, exception_map[stop_exception].sigmap); - - if (exception_map[stop_exception].print || force_print) - { - target_terminal_ours (); - - printf_filtered ("\n%s received %s exception : ", - who, - exception_map[stop_exception].name); - - wrap_here (" "); - - switch (stop_exception) - { - case EXC_BAD_ACCESS: - printf_filtered ("referencing address 0x%x : %s\n", - stop_subcode, - mach_error_string (stop_code)); - break; - case EXC_BAD_INSTRUCTION: - printf_filtered - ("illegal or undefined instruction. code %d subcode %d\n", - stop_code, stop_subcode); - break; - case EXC_ARITHMETIC: - printf_filtered ("code %d\n", stop_code); - break; - case EXC_EMULATION: - printf_filtered ("code %d subcode %d\n", stop_code, stop_subcode); - break; - case EXC_SOFTWARE: - printf_filtered ("%s specific, code 0x%x\n", - stop_code < 0xffff ? "hardware" : "os emulation", - stop_code); - break; - case EXC_BREAKPOINT: - printf_filtered ("type %d (machine dependent)\n", - stop_code); - break; - default: - internal_error (__FILE__, __LINE__, - "Unknown exception"); - } - } -} - -setup_notify_port (int create_new) -{ - kern_return_t ret; - - if (MACH_PORT_VALID (our_notify_port)) - { - ret = mach_port_destroy (mach_task_self (), our_notify_port); - CHK ("Could not destroy our_notify_port", ret); - } - - our_notify_port = MACH_PORT_NULL; - notify_chain = (port_chain_t) NULL; - port_chain_destroy (port_chain_obstack); - - if (create_new) - { - ret = mach_port_allocate (mach_task_self (), - MACH_PORT_RIGHT_RECEIVE, - &our_notify_port); - if (ret != KERN_SUCCESS) - internal_error (__FILE__, __LINE__, - "Creating notify port %s", mach_error_string (ret)); - - ret = mach_port_move_member (mach_task_self (), - our_notify_port, - inferior_wait_port_set); - if (ret != KERN_SUCCESS) - internal_error (__FILE__, __LINE__, - "initial move member %s", mach_error_string (ret)); - } -} - -/* - * Register our message port to the net name server - * - * Currently used only by the external stop-gdb program - * since ^C does not work if you would like to enter - * gdb command level while debugging your program. - * - * NOTE: If the message port is sometimes used for other - * purposes also, the NAME must not be a guessable one. - * Then, there should be a way to change it. - */ - -char registered_name[MAX_NAME_LEN]; - -void -message_port_info (char *args, int from_tty) -{ - if (registered_name[0]) - printf_filtered ("gdb's message port name: '%s'\n", - registered_name); - else - printf_filtered ("gdb's message port is not currently registered\n"); -} - -void -gdb_register_port (char *name, mach_port_t port) -{ - kern_return_t ret; - static int already_signed = 0; - int len; - - if (!MACH_PORT_VALID (port) || !name || !*name) - { - warning ("Invalid registration request"); - return; - } - - if (!already_signed) - { - ret = mach_port_insert_right (mach_task_self (), - our_message_port, - our_message_port, - MACH_MSG_TYPE_MAKE_SEND); - CHK ("Failed to create a signature to our_message_port", ret); - already_signed = 1; - } - else if (already_signed > 1) - { - ret = netname_check_out (name_server_port, - registered_name, - our_message_port); - CHK ("Failed to check out gdb's message port", ret); - registered_name[0] = '\000'; - already_signed = 1; - } - - ret = netname_check_in (name_server_port, /* Name server port */ - name, /* Name of service */ - our_message_port, /* Signature */ - port); /* Creates a new send right */ - CHK ("Failed to check in the port", ret); - - len = 0; - while (len < MAX_NAME_LEN && *(name + len)) - { - registered_name[len] = *(name + len); - len++; - } - registered_name[len] = '\000'; - already_signed = 2; -} - -struct cmd_list_element *cmd_thread_list; -struct cmd_list_element *cmd_task_list; - -/*ARGSUSED */ -static void -thread_command (char *arg, int from_tty) -{ - printf_unfiltered ("\"thread\" must be followed by the name of a thread command.\n"); - help_list (cmd_thread_list, "thread ", -1, gdb_stdout); -} - -/*ARGSUSED */ -static void -task_command (char *arg, int from_tty) -{ - printf_unfiltered ("\"task\" must be followed by the name of a task command.\n"); - help_list (cmd_task_list, "task ", -1, gdb_stdout); -} - -add_mach_specific_commands (void) -{ - /* Thread handling commands */ - - /* FIXME: Move our thread support into the generic thread.c stuff so we - can share that code. */ - add_prefix_cmd ("mthread", class_stack, thread_command, - "Generic command for handling Mach threads in the debugged task.", - &cmd_thread_list, "thread ", 0, &cmdlist); - - add_com_alias ("th", "mthread", class_stack, 1); - - add_cmd ("select", class_stack, thread_select_command, - "Select and print MID of the selected thread", - &cmd_thread_list); - add_cmd ("list", class_stack, thread_list_command, - "List info of task's threads. Selected thread is marked with '*'", - &cmd_thread_list); - add_cmd ("suspend", class_run, thread_suspend_command, - "Suspend one or all of the threads in the selected task.", - &cmd_thread_list); - add_cmd ("resume", class_run, thread_resume_command, - "Resume one or all of the threads in the selected task.", - &cmd_thread_list); - add_cmd ("kill", class_run, thread_kill_command, - "Kill the specified thread MID from inferior task.", - &cmd_thread_list); -#if 0 - /* The rest of this support (condition_thread) was not merged. It probably - should not be merged in this form, but instead added to the generic GDB - thread support. */ - add_cmd ("break", class_breakpoint, condition_thread, - "Breakpoint N will only be effective for thread MID or @SLOT\n\ - If MID/@SLOT is omitted allow all threads to break at breakpoint", - &cmd_thread_list); -#endif - /* Thread command shorthands (for backward compatibility) */ - add_alias_cmd ("ts", "mthread select", 0, 0, &cmdlist); - add_alias_cmd ("tl", "mthread list", 0, 0, &cmdlist); - - /* task handling commands */ - - add_prefix_cmd ("task", class_stack, task_command, - "Generic command for handling debugged task.", - &cmd_task_list, "task ", 0, &cmdlist); - - add_com_alias ("ta", "task", class_stack, 1); - - add_cmd ("suspend", class_run, task_suspend_command, - "Suspend the inferior task.", - &cmd_task_list); - add_cmd ("resume", class_run, task_resume_command, - "Resume the inferior task.", - &cmd_task_list); - add_cmd ("info", no_class, task_info_command, - "Print information about the specified task.", - &cmd_task_list); - - /* Print my message port name */ - - add_info ("message-port", message_port_info, - "Returns the name of gdb's message port in the netnameserver"); - - /* Exception commands */ - - add_info ("exceptions", exception_info, - "What debugger does when program gets various exceptions.\n\ -Specify an exception number as argument to print info on that\n\ -exception only."); - - add_com ("exception", class_run, exception_command, - "Specify how to handle an exception.\n\ -Args are exception number followed by \"forward\" or \"keep\".\n\ -`Forward' means forward the exception to the program's normal exception\n\ -handler.\n\ -`Keep' means reenter debugger if this exception happens, and GDB maps\n\ -the exception to some signal (see info exception)\n\ -Normally \"keep\" is used to return to GDB on exception."); -} - -kern_return_t -do_mach_notify_dead_name (mach_port_t notify, mach_port_t name) -{ - kern_return_t kr = KERN_SUCCESS; - - /* Find the thing that notified */ - port_chain_t element = port_chain_member (notify_chain, name); - - /* Take name of from unreceived dead name notification list */ - notify_chain = port_chain_delete (notify_chain, name); - - if (!element) - error ("Received a dead name notify from unchained port (0x%x)", name); - - switch (element->type) - { - - case MACH_TYPE_THREAD: - target_terminal_ours_for_output (); - if (name == current_thread) - { - printf_filtered ("\nCurrent thread %d died", element->mid); - current_thread = MACH_PORT_NULL; - } - else - printf_filtered ("\nThread %d died", element->mid); - - break; - - case MACH_TYPE_TASK: - target_terminal_ours_for_output (); - if (name != inferior_task) - printf_filtered ("Task %d died, but it was not the selected task", - element->mid); - else - { - printf_filtered ("Current task %d died", element->mid); - - mach_port_destroy (mach_task_self (), name); - inferior_task = MACH_PORT_NULL; - - if (notify_chain) - warning ("There were still unreceived dead_name_notifications???"); - - /* Destroy the old notifications */ - setup_notify_port (0); - - } - break; - - default: - error ("Unregistered dead_name 0x%x notification received. Type is %d, mid is 0x%x", - name, element->type, element->mid); - break; - } - - return KERN_SUCCESS; -} - -kern_return_t -do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) -{ - warning ("do_mach_notify_msg_accepted : notify %x, name %x", - notify, name); - return KERN_SUCCESS; -} - -kern_return_t -do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t mscount) -{ - warning ("do_mach_notify_no_senders : notify %x, mscount %x", - notify, mscount); - return KERN_SUCCESS; -} - -kern_return_t -do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) -{ - warning ("do_mach_notify_port_deleted : notify %x, name %x", - notify, name); - return KERN_SUCCESS; -} - -kern_return_t -do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t rights) -{ - warning ("do_mach_notify_port_destroyed : notify %x, rights %x", - notify, rights); - return KERN_SUCCESS; -} - -kern_return_t -do_mach_notify_send_once (mach_port_t notify) -{ -#ifdef DUMP_SYSCALL - /* MANY of these are generated. */ - warning ("do_mach_notify_send_once : notify %x", - notify); -#endif - return KERN_SUCCESS; -} - -/* Kills the inferior. It's gone when you call this */ -static void -kill_inferior_fast (void) -{ - WAITTYPE w; - - if (PIDGET (inferior_ptid) == 0 || PIDGET (inferior_ptid) == 1) - return; - - /* kill() it, since the Unix server does not otherwise notice when - * killed with task_terminate(). - */ - if (PIDGET (inferior_ptid) > 0) - kill (PIDGET (inferior_ptid), SIGKILL); - - /* It's propably terminate already */ - (void) task_terminate (inferior_task); - - inferior_task = MACH_PORT_NULL; - current_thread = MACH_PORT_NULL; - - wait3 (&w, WNOHANG, 0); - - setup_notify_port (0); -} - -static void -m3_kill_inferior (void) -{ - kill_inferior_fast (); - target_mourn_inferior (); -} - -/* Clean up after the inferior dies. */ - -static void -m3_mourn_inferior (void) -{ - unpush_target (&m3_ops); - generic_mourn_inferior (); -} - - -/* Fork an inferior process, and start debugging it. */ - -static void -m3_create_inferior (char *exec_file, char *allargs, char **env) -{ - fork_inferior (exec_file, allargs, env, m3_trace_me, m3_trace_him, NULL, NULL); - /* We are at the first instruction we care about. */ - /* Pedal to the metal... */ - proceed ((CORE_ADDR) -1, 0, 0); -} - -/* Mark our target-struct as eligible for stray "run" and "attach" - commands. */ -static int -m3_can_run (void) -{ - return 1; -} - -/* Mach 3.0 does not need ptrace for anything - * Make sure nobody uses it on mach. - */ -ptrace (int a, int b, int c, int d) -{ - error ("Lose, Lose! Somebody called ptrace\n"); -} - -/* Resume execution of the inferior process. - If STEP is nonzero, single-step it. - If SIGNAL is nonzero, give it that signal. */ - -void -m3_resume (ptid_t ptid, int step, enum target_signal signal) -{ - kern_return_t ret; - - if (step) - { - thread_basic_info_data_t th_info; - unsigned int infoCnt = THREAD_BASIC_INFO_COUNT; - - /* There is no point in single stepping when current_thread - * is dead. - */ - if (!MACH_PORT_VALID (current_thread)) - error ("No thread selected; can not single step"); - - /* If current_thread is suspended, tracing it would never return. - */ - ret = thread_info (current_thread, - THREAD_BASIC_INFO, - (thread_info_t) & th_info, - &infoCnt); - CHK ("child_resume: can't get thread info", ret); - - if (th_info.suspend_count) - error ("Can't trace a suspended thread. Use \"thread resume\" command to resume it"); - } - - vm_read_cache_valid = FALSE; - - if (signal && PIDGET (inferior_ptid) > 0) /* Do not signal, if attached by MID */ - kill (PIDGET (inferior_ptid), target_signal_to_host (signal)); - - if (step) - { - suspend_all_threads (0); - - setup_single_step (current_thread, TRUE); - - ret = thread_resume (current_thread); - CHK ("thread_resume", ret); - } - - ret = task_resume (inferior_task); - if (ret == KERN_FAILURE) - warning ("Task was not suspended"); - else - CHK ("Resuming task", ret); - - /* HACK HACK This is needed by the multiserver system HACK HACK */ - while ((ret = task_resume (inferior_task)) == KERN_SUCCESS) - /* make sure it really runs */ ; - /* HACK HACK This is needed by the multiserver system HACK HACK */ -} - -#ifdef ATTACH_DETACH - -/* Start debugging the process with the given task */ -void -task_attach (task_t tid) -{ - kern_return_t ret; - inferior_task = tid; - - ret = task_suspend (inferior_task); - CHK ("task_attach: task_suspend", ret); - - must_suspend_thread = 0; - - setup_notify_port (1); - - request_notify (inferior_task, MACH_NOTIFY_DEAD_NAME, MACH_TYPE_TASK); - - setup_exception_port (); - - emulator_present = have_emulator_p (inferior_task); - - attach_flag = 1; -} - -/* Well, we can call error also here and leave the - * target stack inconsistent. Sigh. - * Fix this sometime (the only way to fail here is that - * the task has no threads at all, which is rare, but - * possible; or if the target task has died, which is also - * possible, but unlikely, since it has been suspended. - * (Someone must have killed it)) - */ -void -attach_to_thread (void) -{ - if (select_thread (inferior_task, 0, 1) != KERN_SUCCESS) - error ("Could not select any threads to attach to"); -} - -mid_attach (int mid) -{ - kern_return_t ret; - - ret = machid_mach_port (mid_server, mid_auth, mid, &inferior_task); - CHK ("mid_attach: machid_mach_port", ret); - - task_attach (inferior_task); - - return mid; -} - -/* - * Start debugging the process whose unix process-id is PID. - * A negative "pid" value is legal and signifies a mach_id not a unix pid. - * - * Prevent (possible unwanted) dangerous operations by enabled users - * like "atta 0" or "atta foo" (equal to the previous :-) and - * "atta pidself". Anyway, the latter is allowed by specifying a MID. - */ -static int -m3_do_attach (int pid) -{ - kern_return_t ret; - - if (pid == 0) - error ("MID=0, Debugging the master unix server does not compute"); - - /* Foo. This assumes gdb has a unix pid */ - if (pid == getpid ()) - error ("I will debug myself only by mid. (Gdb would suspend itself!)"); - - if (pid < 0) - { - mid_attach (-(pid)); - - /* inferior_ptid will be NEGATIVE! */ - inferior_ptid = pid_to_ptid (pid); - - return PIDGET (inferior_ptid); - } - - inferior_task = task_by_pid (pid); - if (!MACH_PORT_VALID (inferior_task)) - error ("Cannot map Unix pid %d to Mach task port", pid); - - task_attach (inferior_task); - - inferior_ptid = pid_to_ptid (pid); - - return PIDGET (inferior_ptid); -} - -/* Attach to process PID, then initialize for debugging it - and wait for the trace-trap that results from attaching. */ - -static void -m3_attach (char *args, int from_tty) -{ - char *exec_file; - int pid; - - if (!args) - error_no_arg ("process-id to attach"); - - pid = atoi (args); - - if (pid == getpid ()) /* Trying to masturbate? */ - error ("I refuse to debug myself!"); - - if (from_tty) - { - exec_file = (char *) get_exec_file (0); - - if (exec_file) - printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, - target_pid_to_str (pid_to_ptid (pid))); - else - printf_unfiltered ("Attaching to %s\n", - target_pid_to_str (pid_to_ptid (pid))); - - gdb_flush (gdb_stdout); - } - - m3_do_attach (pid_to_ptid (pid)); - inferior_ptid = pid_to_ptid (pid); - push_target (&m3_ops); -} - -void -deallocate_inferior_ports (void) -{ - kern_return_t ret; - thread_array_t thread_list; - int thread_count, index; - - if (!MACH_PORT_VALID (inferior_task)) - return; - - ret = task_threads (inferior_task, &thread_list, &thread_count); - if (ret != KERN_SUCCESS) - { - warning ("deallocate_inferior_ports: task_threads", - mach_error_string (ret)); - return; - } - - /* Get rid of send rights to task threads */ - for (index = 0; index < thread_count; index++) - { - int rights; - ret = mach_port_get_refs (mach_task_self (), - thread_list[index], - MACH_PORT_RIGHT_SEND, - &rights); - CHK ("deallocate_inferior_ports: get refs", ret); - - if (rights > 0) - { - ret = mach_port_mod_refs (mach_task_self (), - thread_list[index], - MACH_PORT_RIGHT_SEND, - -rights); - CHK ("deallocate_inferior_ports: mod refs", ret); - } - } - - ret = mach_port_mod_refs (mach_task_self (), - inferior_exception_port, - MACH_PORT_RIGHT_RECEIVE, - -1); - CHK ("deallocate_inferior_ports: cannot get rid of exception port", ret); - - ret = mach_port_deallocate (mach_task_self (), - inferior_task); - CHK ("deallocate_task_port: deallocating inferior_task", ret); - - current_thread = MACH_PORT_NULL; - inferior_task = MACH_PORT_NULL; -} - -/* Stop debugging the process whose number is PID - and continue it with signal number SIGNAL. - SIGNAL = 0 means just continue it. */ - -static void -m3_do_detach (int signal) -{ - kern_return_t ret; - - MACH_ERROR_NO_INFERIOR; - - if (current_thread != MACH_PORT_NULL) - { - /* Store the gdb's view of the thread we are deselecting - * before we detach. - * @@ I am really not sure if this is ever needeed. - */ - target_prepare_to_store (); - target_store_registers (-1); - } - - ret = task_set_special_port (inferior_task, - TASK_EXCEPTION_PORT, - inferior_old_exception_port); - CHK ("task_set_special_port", ret); - - /* Discard all requested notifications */ - setup_notify_port (0); - - if (remove_breakpoints ()) - warning ("Could not remove breakpoints when detaching"); - - if (signal && PIDGET (inferior_ptid) > 0) - kill (PIDGET (inferior_ptid), signal); - - /* the task might be dead by now */ - (void) task_resume (inferior_task); - - deallocate_inferior_ports (); - - attach_flag = 0; -} - -/* Take a program previously attached to and detaches it. - The program resumes execution and will no longer stop - on signals, etc. We'd better not have left any breakpoints - in the program or it'll die when it hits one. For this - to work, it may be necessary for the process to have been - previously attached. It *might* work if the program was - started via fork. */ - -static void -m3_detach (char *args, int from_tty) -{ - int siggnal = 0; - - if (from_tty) - { - char *exec_file = get_exec_file (0); - if (exec_file == 0) - exec_file = ""; - printf_unfiltered ("Detaching from program: %s %s\n", - exec_file, target_pid_to_str (inferior_ptid)); - gdb_flush (gdb_stdout); - } - if (args) - siggnal = atoi (args); - - m3_do_detach (siggnal); - inferior_ptid = null_ptid; - unpush_target (&m3_ops); /* Pop out of handling an inferior */ -} -#endif /* ATTACH_DETACH */ - -/* Get ready to modify the registers array. On machines which store - individual registers, this doesn't need to do anything. On machines - which store all the registers in one fell swoop, this makes sure - that registers contains all the registers from the program being - debugged. */ - -static void -m3_prepare_to_store (void) -{ -#ifdef CHILD_PREPARE_TO_STORE - CHILD_PREPARE_TO_STORE (); -#endif -} - -/* Print status information about what we're accessing. */ - -static void -m3_files_info (struct target_ops *ignore) -{ - /* FIXME: should print MID and all that crap. */ - printf_unfiltered ("\tUsing the running image of %s %s.\n", - attach_flag ? "attached" : "child", target_pid_to_str (inferior_ptid)); -} - -static void -m3_open (char *arg, int from_tty) -{ - error ("Use the \"run\" command to start a Unix child process."); -} - -#ifdef DUMP_SYSCALL -#define STR(x) #x - -char *bsd1_names[] = -{ - "execve", - "fork", - "take_signal", - "sigreturn", - "getrusage", - "chdir", - "chroot", - "open", - "creat", - "mknod", - "link", - "symlink", - "unlink", - "access", - "stat", - "readlink", - "chmod", - "chown", - "utimes", - "truncate", - "rename", - "mkdir", - "rmdir", - "xutimes", - "mount", - "umount", - "acct", - "setquota", - "write_short", - "write_long", - "send_short", - "send_long", - "sendto_short", - "sendto_long", - "select", - "task_by_pid", - "recvfrom_short", - "recvfrom_long", - "setgroups", - "setrlimit", - "sigvec", - "sigstack", - "settimeofday", - "adjtime", - "setitimer", - "sethostname", - "bind", - "accept", - "connect", - "setsockopt", - "getsockopt", - "getsockname", - "getpeername", - "init_process", - "table_set", - "table_get", - "pioctl", - "emulator_error", - "readwrite", - "share_wakeup", - 0, - "maprw_request_it", - "maprw_release_it", - "maprw_remap", - "pid_by_task", -}; - -int bsd1_nnames = sizeof (bsd1_names) / sizeof (bsd1_names[0]); - -char * -name_str (int name, char *buf) -{ - switch (name) - { - case MACH_MSG_TYPE_BOOLEAN: - return "boolean"; - case MACH_MSG_TYPE_INTEGER_16: - return "short"; - case MACH_MSG_TYPE_INTEGER_32: - return "long"; - case MACH_MSG_TYPE_CHAR: - return "char"; - case MACH_MSG_TYPE_BYTE: - return "byte"; - case MACH_MSG_TYPE_REAL: - return "real"; - case MACH_MSG_TYPE_STRING: - return "string"; - default: - sprintf (buf, "%d", name); - return buf; - } -} - -char * -id_str (int id, char *buf) -{ - char *p; - if (id >= 101000 && id < 101000 + bsd1_nnames) - { - if (p = bsd1_names[id - 101000]) - return p; - } - if (id == 102000) - return "psignal_retry"; - if (id == 100000) - return "syscall"; - sprintf (buf, "%d", id); - return buf; -} - -print_msg (mach_msg_header_t *mp) -{ - char *fmt_x = "%20s : 0x%08x\n"; - char *fmt_d = "%20s : %10d\n"; - char *fmt_s = "%20s : %s\n"; - char buf[100]; - - puts_filtered ("\n"); -#define pr(fmt,h,x) printf_filtered(fmt,STR(x),(h).x) - pr (fmt_x, (*mp), msgh_bits); - pr (fmt_d, (*mp), msgh_size); - pr (fmt_x, (*mp), msgh_remote_port); - pr (fmt_x, (*mp), msgh_local_port); - pr (fmt_d, (*mp), msgh_kind); - printf_filtered (fmt_s, STR (msgh_id), id_str (mp->msgh_id, buf)); - - if (debug_level > 1) - { - char *p, *ep, *dp; - int plen; - p = (char *) mp; - ep = p + mp->msgh_size; - p += sizeof (*mp); - for (; p < ep; p += plen) - { - mach_msg_type_t *tp; - mach_msg_type_long_t *tlp; - int name, size, number; - tp = (mach_msg_type_t *) p; - if (tp->msgt_longform) - { - tlp = (mach_msg_type_long_t *) tp; - name = tlp->msgtl_name; - size = tlp->msgtl_size; - number = tlp->msgtl_number; - plen = sizeof (*tlp); - } - else - { - name = tp->msgt_name; - size = tp->msgt_size; - number = tp->msgt_number; - plen = sizeof (*tp); - } - printf_filtered ("name=%-16s size=%2d number=%7d inline=%d long=%d deal=%d\n", - name_str (name, buf), size, number, tp->msgt_inline, - tp->msgt_longform, tp->msgt_deallocate); - dp = p + plen; - if (tp->msgt_inline) - { - int l; - l = size * number / 8; - l = (l + sizeof (long) - 1) & ~((sizeof (long)) - 1); - plen += l; - print_data (dp, size, number); - } - else - { - plen += sizeof (int *); - } - printf_filtered ("plen=%d\n", plen); - } - } -} - -print_data (char *p, int size, int number) -{ - int *ip; - short *sp; - int i; - - switch (size) - { - case 8: - for (i = 0; i < number; i++) - { - printf_filtered (" %02x", p[i]); - } - break; - case 16: - sp = (short *) p; - for (i = 0; i < number; i++) - { - printf_filtered (" %04x", sp[i]); - } - break; - case 32: - ip = (int *) p; - for (i = 0; i < number; i++) - { - printf_filtered (" %08x", ip[i]); - } - break; - } - puts_filtered ("\n"); -} -#endif /* DUMP_SYSCALL */ - -static void -m3_stop (void) -{ - error ("to_stop target function not implemented"); -} - -static char * -m3_pid_to_exec_file (int pid) -{ - error ("to_pid_to_exec_file target function not implemented"); - return NULL; /* To keep all compilers happy. */ -} - -static void -init_m3_ops (void) -{ - m3_ops.to_shortname = "mach"; - m3_ops.to_longname = "Mach child process"; - m3_ops.to_doc = "Mach child process (started by the \"run\" command)."; - m3_ops.to_open = m3_open; - m3_ops.to_attach = m3_attach; - m3_ops.to_detach = m3_detach; - m3_ops.to_resume = m3_resume; - m3_ops.to_wait = mach_really_wait; - m3_ops.to_fetch_registers = fetch_inferior_registers; - m3_ops.to_store_registers = store_inferior_registers; - m3_ops.to_prepare_to_store = m3_prepare_to_store; - m3_ops.to_xfer_memory = m3_xfer_memory; - m3_ops.to_files_info = m3_files_info; - m3_ops.to_insert_breakpoint = memory_insert_breakpoint; - m3_ops.to_remove_breakpoint = memory_remove_breakpoint; - m3_ops.to_terminal_init = terminal_init_inferior; - m3_ops.to_terminal_inferior = terminal_inferior; - m3_ops.to_terminal_ours_for_output = terminal_ours_for_output; - m3_ops.to_terminal_ours = terminal_ours; - m3_ops.to_terminal_info = child_terminal_info; - m3_ops.to_kill = m3_kill_inferior; - m3_ops.to_create_inferior = m3_create_inferior; - m3_ops.to_mourn_inferior = m3_mourn_inferior; - m3_ops.to_can_run = m3_can_run; - m3_ops.to_stop = m3_stop; - m3_ops.to_pid_to_exec_file = m3_pid_to_exec_file; - m3_ops.to_stratum = process_stratum; - m3_ops.to_has_all_memory = 1; - m3_ops.to_has_memory = 1; - m3_ops.to_has_stack = 1; - m3_ops.to_has_registers = 1; - m3_ops.to_has_execution = 1; - m3_ops.to_magic = OPS_MAGIC; -} - -void -_initialize_m3_nat (void) -{ - kern_return_t ret; - - init_m3_ops (); - add_target (&m3_ops); - - ret = mach_port_allocate (mach_task_self (), - MACH_PORT_RIGHT_PORT_SET, - &inferior_wait_port_set); - if (ret != KERN_SUCCESS) - internal_error (__FILE__, __LINE__, - "initial port set %s", mach_error_string (ret)); - - /* mach_really_wait now waits for this */ - currently_waiting_for = inferior_wait_port_set; - - ret = netname_look_up (name_server_port, hostname, "MachID", &mid_server); - if (ret != KERN_SUCCESS) - { - mid_server = MACH_PORT_NULL; - - warning ("initialize machid: netname_lookup_up(MachID) : %s", - mach_error_string (ret)); - warning ("Some (most?) features disabled..."); - } - - mid_auth = mach_privileged_host_port (); - if (mid_auth == MACH_PORT_NULL) - mid_auth = mach_task_self (); - - obstack_init (port_chain_obstack); - - ret = mach_port_allocate (mach_task_self (), - MACH_PORT_RIGHT_RECEIVE, - &thread_exception_port); - CHK ("Creating thread_exception_port for single stepping", ret); - - ret = mach_port_insert_right (mach_task_self (), - thread_exception_port, - thread_exception_port, - MACH_MSG_TYPE_MAKE_SEND); - CHK ("Inserting send right to thread_exception_port", ret); - - /* Allocate message port */ - ret = mach_port_allocate (mach_task_self (), - MACH_PORT_RIGHT_RECEIVE, - &our_message_port); - if (ret != KERN_SUCCESS) - warning ("Creating message port %s", mach_error_string (ret)); - else - { - char buf[MAX_NAME_LEN]; - ret = mach_port_move_member (mach_task_self (), - our_message_port, - inferior_wait_port_set); - if (ret != KERN_SUCCESS) - warning ("message move member %s", mach_error_string (ret)); - - - /* @@@@ No way to change message port name currently */ - /* Foo. This assumes gdb has a unix pid */ - sprintf (buf, "gdb-%d", getpid ()); - gdb_register_port (buf, our_message_port); - } - - /* Heap for thread commands */ - obstack_init (cproc_obstack); - - add_mach_specific_commands (); -} |