diff options
author | Nicholas Duffek <nsd@redhat.com> | 2000-03-02 06:05:03 +0000 |
---|---|---|
committer | Nicholas Duffek <nsd@redhat.com> | 2000-03-02 06:05:03 +0000 |
commit | a7896a9c9ecdfad962e72f710d3f4092075bcaef (patch) | |
tree | 319f2a55830f18173b7b5e78a6fbd18498254fa2 /gdb/uw-thread.c | |
parent | 0da2286f82321d85a730f2d886f95a503fca6dc1 (diff) | |
download | gdb-a7896a9c9ecdfad962e72f710d3f4092075bcaef.tar.gz |
* uw-thread.c: Apply GNU conventions to comment formatting.
(deactivate_uw_thread): Call remove_thread_event_breakpoints().
(uw_thread_mourn_inferior): Move remove_thread_event_breakpoints()
call to deactivate_uw_thread().
Diffstat (limited to 'gdb/uw-thread.c')
-rw-r--r-- | gdb/uw-thread.c | 367 |
1 files changed, 159 insertions, 208 deletions
diff --git a/gdb/uw-thread.c b/gdb/uw-thread.c index 07f4ac632b1..e3650a93b51 100644 --- a/gdb/uw-thread.c +++ b/gdb/uw-thread.c @@ -103,10 +103,9 @@ #include "inferior.h" #include <fcntl.h> -/* - * <thread.h> includes <sys/priocntl.h>, which requires boolean_t from - * <sys/types.h>, which doesn't typedef boolean_t with gcc. - */ +/* <thread.h> includes <sys/priocntl.h>, which requires boolean_t from + <sys/types.h>, which doesn't typedef boolean_t with gcc. */ + #define boolean_t int #include <thread.h> #undef boolean_t @@ -114,19 +113,16 @@ #include <synch.h> /* for UnixWare 2.x */ -/* - * Whether to emit debugging output. - */ +/* Whether to emit debugging output. */ + #define DEBUG 0 -/* - * Default debugging output file, overridden by envvar UWTHR_DEBUG. - */ +/* Default debugging output file, overridden by envvar UWTHR_DEBUG. */ + #define DEBUG_FILE "/dev/tty" -/* - * #if DEBUG, write string S to the debugging output channel. - */ +/* #if DEBUG, write string S to the debugging output channel. */ + #if !DEBUG # define DBG(fmt_and_args) # define DBG2(fmt_and_args) @@ -135,10 +131,9 @@ # define DBG2(fmt_and_args) #endif -/* - * Back end to CALL_BASE() and TRY_BASE(): evaluate CALL, then convert - * inferior_pid to a composite thread/process id. - */ +/* Back end to CALL_BASE() and TRY_BASE(): evaluate CALL, then convert + inferior_pid to a composite thread/process id. */ + #define CALL_BASE_1(call) \ do { \ DBG2(("CALL_BASE(" #call ")")); \ @@ -146,13 +141,12 @@ do { \ do_cleanups (infpid_cleanup); \ } while (0) -/* - * If inferior_pid can be converted to a composite lwp/process id, do so, - * evaluate base_ops function CALL, and then convert inferior_pid back to a - * composite thread/process id. - * - * Otherwise, issue an error message and return nonlocally. - */ +/* If inferior_pid can be converted to a composite lwp/process id, do so, + evaluate base_ops function CALL, and then convert inferior_pid back to a + composite thread/process id. + + Otherwise, issue an error message and return nonlocally. */ + #define CALL_BASE(call) \ do { \ if (!lwp_infpid ()) \ @@ -160,28 +154,25 @@ do { \ CALL_BASE_1 (call); \ } while (0) -/* - * Like CALL_BASE(), but instead of returning nonlocally on error, set - * *CALLED to whether the inferior_pid conversion was successful. - */ +/* Like CALL_BASE(), but instead of returning nonlocally on error, set + *CALLED to whether the inferior_pid conversion was successful. */ + #define TRY_BASE(call, called) \ do { \ if ((*(called) = lwp_infpid ())) \ CALL_BASE_1 (call); \ } while (0) -/* - * Information passed by thread_iter() to its callback parameter. - */ +/* Information passed by thread_iter() to its callback parameter. */ + typedef struct { struct thread_map map; __lwp_desc_t lwp; CORE_ADDR mapp; } iter_t; -/* - * Private thread data for the thread_info struct. - */ +/* Private thread data for the thread_info struct. */ + struct private_thread_info { int stable; /* 0 if libthread.so is modifying thread map */ int thrid; /* thread id assigned by libthread.so */ @@ -231,10 +222,9 @@ static struct cleanup *infpid_cleanup; #if DEBUG -/* - * Helper function for DBG() macro: if printf-style FMT is non-null, format it - * with args and display the result on the debugging output channel. - */ +/* Helper function for DBG() macro: if printf-style FMT is non-null, format it + with args and display the result on the debugging output channel. */ + static void dbg (char *fmt, ...) { @@ -265,9 +255,8 @@ dbg (char *fmt, ...) } #if 0 -/* - * Return a string representing composite PID's components. - */ +/* Return a string representing composite PID's components. */ + static char * dbgpid (int pid) { @@ -286,9 +275,8 @@ dbgpid (int pid) return buf; } -/* - * Return a string representing thread state CHANGE. - */ +/* Return a string representing thread state CHANGE. */ + static char * dbgchange (enum thread_change change) { @@ -306,9 +294,8 @@ dbgchange (enum thread_change change) } } -/* - * Return a string representing thread STATE. - */ +/* Return a string representing thread STATE. */ + static char * dbgstate (int state) { @@ -328,9 +315,8 @@ dbgstate (int state) #endif /* DEBUG */ -/* - * Read the contents of _thr_debug into *DEBUGP. Return success. - */ +/* Read the contents of _thr_debug into *DEBUGP. Return success. */ + static int read_thr_debug (struct thread_debug *debugp) { @@ -338,10 +324,9 @@ read_thr_debug (struct thread_debug *debugp) sizeof (*debugp), 0, &base_ops); } -/* - * Read into MAP the contents of the thread map at inferior process address - * MAPP. Return success. - */ +/* Read into MAP the contents of the thread map at inferior process address + MAPP. Return success. */ + static int read_map (CORE_ADDR mapp, struct thread_map *map) { @@ -349,10 +334,9 @@ read_map (CORE_ADDR mapp, struct thread_map *map) sizeof (*map), 0, &base_ops); } -/* - * Read into LWP the contents of the lwp decriptor at inferior process address - * LWPP. Return success. - */ +/* Read into LWP the contents of the lwp decriptor at inferior process address + LWPP. Return success. */ + static int read_lwp (CORE_ADDR lwpp, __lwp_desc_t *lwp) { @@ -360,16 +344,15 @@ read_lwp (CORE_ADDR lwpp, __lwp_desc_t *lwp) sizeof (*lwp), 0, &base_ops); } -/* - * Iterate through all user threads, applying FUNC(<map>, <lwp>, DATA) until - * (a) FUNC returns nonzero, - * (b) FUNC has been applied to all threads, or - * (c) an error occurs, - * where <map> is the thread's struct thread_map and <lwp> if non-null is the - * thread's current __lwp_desc_t. - * - * If a call to FUNC returns nonzero, return that value; otherwise, return 0. - */ +/* Iterate through all user threads, applying FUNC(<map>, <lwp>, DATA) until + (a) FUNC returns nonzero, + (b) FUNC has been applied to all threads, or + (c) an error occurs, + where <map> is the thread's struct thread_map and <lwp> if non-null is the + thread's current __lwp_desc_t. + + If a call to FUNC returns nonzero, return that value; otherwise, return 0. */ + static int thread_iter (int (*func)(iter_t *, void *), void *data) { @@ -405,20 +388,19 @@ thread_iter (int (*func)(iter_t *, void *), void *data) } } -/* - * Deactivate user-mode thread support. - */ +/* Deactivate user-mode thread support. */ + static void deactivate_uw_thread (void) { + remove_thread_event_breakpoints (); uw_thread_active = 0; unpush_target (&uw_thread_ops); } -/* - * Return the composite lwp/process id corresponding to composite - * id PID. If PID is a thread with no lwp, return 0. - */ +/* Return the composite lwp/process id corresponding to composite + id PID. If PID is a thread with no lwp, return 0. */ + static int thr_to_lwp (int pid) { @@ -438,10 +420,9 @@ thr_to_lwp (int pid) return lid; } -/* - * find_thread_lwp() callback: return whether TP describes a thread - * associated with lwp id DATA. - */ +/* find_thread_lwp() callback: return whether TP describes a thread + associated with lwp id DATA. */ + static int find_thread_lwp_callback (struct thread_info *tp, void *data) { @@ -458,20 +439,18 @@ find_thread_lwp_callback (struct thread_info *tp, void *data) return 1; } -/* - * If a thread is associated with lwp id LWPID, return the corresponding - * member of the global thread list; otherwise, return null. - */ +/* If a thread is associated with lwp id LWPID, return the corresponding + member of the global thread list; otherwise, return null. */ + static struct thread_info * find_thread_lwp (int lwpid) { return iterate_over_threads (find_thread_lwp_callback, (void *)lwpid); } -/* - * Return the composite thread/process id corresponding to composite - * id PID. If PID is an lwp with no thread, return PID. - */ +/* Return the composite thread/process id corresponding to composite + id PID. If PID is an lwp with no thread, return PID. */ + static int lwp_to_thr (int pid) { @@ -491,10 +470,9 @@ lwp_to_thr (int pid) return tid; } -/* - * do_cleanups() callback: convert inferior_pid to a composite - * thread/process id after having made a procfs call. - */ +/* do_cleanups() callback: convert inferior_pid to a composite + thread/process id after having made a procfs call. */ + static void thr_infpid (void *unused) { @@ -504,10 +482,9 @@ thr_infpid (void *unused) inferior_pid = pid; } -/* - * If possible, convert inferior_pid to a composite lwp/process id in - * preparation for making a procfs call. Return success. - */ +/* If possible, convert inferior_pid to a composite lwp/process id in + preparation for making a procfs call. Return success. */ + static int lwp_infpid (void) { @@ -523,10 +500,9 @@ lwp_infpid (void) return 1; } -/* - * Add to the global thread list a new user-mode thread with system id THRID, - * lwp id LWPID, map address MAPP, and composite thread/process PID. - */ +/* Add to the global thread list a new user-mode thread with system id THRID, + lwp id LWPID, map address MAPP, and composite thread/process PID. */ + static void add_thread_uw (int thrid, int lwpid, CORE_ADDR mapp, int pid) { @@ -545,11 +521,10 @@ add_thread_uw (int thrid, int lwpid, CORE_ADDR mapp, int pid) printf_unfiltered ("[New %s]\n", target_pid_to_str (pid)); } -/* - * notice_threads() and find_main() callback: if the thread list doesn't - * already contain the thread described by ITER, add it if it's the main - * thread or if !DATA. - */ +/* notice_threads() and find_main() callback: if the thread list doesn't + already contain the thread described by ITER, add it if it's the main + thread or if !DATA. */ + static int notice_thread (iter_t *iter, void *data) { @@ -563,18 +538,16 @@ notice_thread (iter_t *iter, void *data) return 0; } -/* - * Add to the thread list any threads it doesn't already contain. - */ +/* Add to the thread list any threads it doesn't already contain. */ + static void notice_threads (void) { thread_iter (notice_thread, NULL); } -/* - * Return the address of the main thread's map. On error, return 0. - */ +/* Return the address of the main thread's map. On error, return 0. */ + static CORE_ADDR find_main (void) { @@ -588,12 +561,11 @@ find_main (void) return thr_map_main; } -/* - * Attach to process specified by ARGS, then initialize for debugging it - * and wait for the trace-trap that results from attaching. - * - * This function only gets called with uw_thread_active == 0. - */ +/* Attach to process specified by ARGS, then initialize for debugging it + and wait for the trace-trap that results from attaching. + + This function only gets called with uw_thread_active == 0. */ + static void uw_thread_attach (char *args, int from_tty) { @@ -602,9 +574,8 @@ uw_thread_attach (char *args, int from_tty) thr_infpid (NULL); } -/* - * Detach from the process attached to by uw_thread_attach(). - */ +/* Detach from the process attached to by uw_thread_attach(). */ + static void uw_thread_detach (char *args, int from_tty) { @@ -612,10 +583,9 @@ uw_thread_detach (char *args, int from_tty) base_ops.to_detach (args, from_tty); } -/* - * Tell the inferior process to continue running thread PID if >= 0 - * and all threads otherwise. - */ +/* Tell the inferior process to continue running thread PID if >= 0 + and all threads otherwise. */ + static void uw_thread_resume (int pid, int step, enum target_signal signo) { @@ -625,11 +595,10 @@ uw_thread_resume (int pid, int step, enum target_signal signo) CALL_BASE (base_ops.to_resume (pid, step, signo)); } -/* - * If the trap we just received from lwp PID was due to a breakpoint - * on the libthread.so debugging stub, update this module's state - * accordingly. - */ +/* If the trap we just received from lwp PID was due to a breakpoint + on the libthread.so debugging stub, update this module's state + accordingly. */ + static void libthread_stub (int pid) { @@ -710,14 +679,13 @@ libthread_stub (int pid) if (change == tc_switch_complete) { - /* - * If switchto_thread is the main thread, then (a) the corresponding - * tc_switch_begin probably received a null map argument and therefore - * (b) it may have been a spurious switch following a tc_thread_exit. - * - * Therefore, explicitly query the thread's lwp before caching it in - * its thread list entry. - */ + /* If switchto_thread is the main thread, then (a) the corresponding + tc_switch_begin probably received a null map argument and therefore + (b) it may have been a spurious switch following a tc_thread_exit. + + Therefore, explicitly query the thread's lwp before caching it in + its thread list entry. */ + if (!read_map (switchto_thread->private->mapp, &map)) goto err; if (map.thr_lwpp) @@ -747,9 +715,8 @@ libthread_stub (int pid) dbgchange (change), tid ? dbgstate (map.thr_state) : "")); } -/* - * Wait for thread/lwp/process ID if >= 0 or for any thread otherwise. - */ +/* Wait for thread/lwp/process ID if >= 0 or for any thread otherwise. */ + static int uw_thread_wait (int pid, struct target_waitstatus *status) { @@ -764,10 +731,9 @@ uw_thread_wait (int pid, struct target_waitstatus *status) return lwp_to_thr (pid); } -/* - * Tell gdb about the registers in the thread/lwp/process specified by - * inferior_pid. - */ +/* Tell gdb about the registers in the thread/lwp/process specified by + inferior_pid. */ + static void uw_thread_fetch_registers (int regno) { @@ -788,30 +754,27 @@ uw_thread_fetch_registers (int regno) supply_fpregset (&map.thr_ucontext.uc_mcontext.fpregs); } -/* - * Store gdb's current view of the register set into the thread/lwp/process - * specified by inferior_pid. - */ +/* Store gdb's current view of the register set into the thread/lwp/process + specified by inferior_pid. */ + static void uw_thread_store_registers (int regno) { CALL_BASE (base_ops.to_store_registers (regno)); } -/* - * Prepare to modify the registers array. - */ +/* Prepare to modify the registers array. */ + static void uw_thread_prepare_to_store (void) { CALL_BASE (base_ops.to_prepare_to_store ()); } -/* - * Fork an inferior process and start debugging it. - * - * This function only gets called with uw_thread_active == 0. - */ +/* Fork an inferior process and start debugging it. + + This function only gets called with uw_thread_active == 0. */ + static void uw_thread_create_inferior (char *exec_file, char *allargs, char **env) { @@ -826,40 +789,35 @@ uw_thread_create_inferior (char *exec_file, char *allargs, char **env) } } -/* - * Kill and forget about the inferior process. - */ +/* Kill and forget about the inferior process. */ + static void uw_thread_kill (void) { base_ops.to_kill (); } -/* - * Clean up after the inferior exits. - */ +/* Clean up after the inferior exits. */ + static void uw_thread_mourn_inferior (void) { - remove_thread_event_breakpoints (); deactivate_uw_thread (); base_ops.to_mourn_inferior (); } -/* - * Return whether this module can attach to and run processes. - * - * This function only gets called with uw_thread_active == 0. - */ +/* Return whether this module can attach to and run processes. + + This function only gets called with uw_thread_active == 0. */ + static int uw_thread_can_run (void) { return procfs_suppress_run; } -/* - * Return whether thread PID is still valid. - */ +/* Return whether thread PID is still valid. */ + static int uw_thread_alive (int pid) { @@ -871,9 +829,8 @@ uw_thread_alive (int pid) return in_thread_list (pid); } -/* - * Add to the thread list any threads and lwps it doesn't already contain. - */ +/* Add to the thread list any threads and lwps it doesn't already contain. */ + static void uw_thread_find_new_threads (void) { @@ -882,10 +839,9 @@ uw_thread_find_new_threads (void) notice_threads (); } -/* - * Return a string for pretty-printing PID in "info threads" output. - * This may be called by either procfs.c or by generic gdb. - */ +/* Return a string for pretty-printing PID in "info threads" output. + This may be called by either procfs.c or by generic gdb. */ + static char * uw_thread_pid_to_str (int pid) { @@ -901,10 +857,9 @@ uw_thread_pid_to_str (int pid) return buf; } -/* - * Return a string displaying INFO state information in "info threads" - * output. - */ +/* Return a string displaying INFO state information in "info threads" + output. */ + static char * uw_extra_thread_info (struct thread_info *info) { @@ -947,15 +902,14 @@ uw_extra_thread_info (struct thread_info *info) return buf; } -/* - * Check whether libthread.so has just been loaded, and if so, try to - * initialize user-space thread debugging support. - * - * libthread.so loading happens while (a) an inferior process is being - * started by procfs and (b) a core image is being loaded. - * - * This function often gets called with uw_thread_active == 0. - */ +/* Check whether libthread.so has just been loaded, and if so, try to + initialize user-space thread debugging support. + + libthread.so loading happens while (a) an inferior process is being + started by procfs and (b) a core image is being loaded. + + This function often gets called with uw_thread_active == 0. */ + static void libthread_init (void) { @@ -1026,17 +980,16 @@ libthread_init (void) deactivate_uw_thread (); } -/* - * target_new_objfile_hook callback. - * - * If OBJFILE is non-null, check whether libthread.so was just loaded, - * and if so, prepare for user-mode thread debugging. - * - * If OBJFILE is null, libthread.so has gone away, so stop debugging - * user-mode threads. - * - * This function often gets called with uw_thread_active == 0. - */ +/* target_new_objfile_hook callback. + + If OBJFILE is non-null, check whether libthread.so was just loaded, + and if so, prepare for user-mode thread debugging. + + If OBJFILE is null, libthread.so has gone away, so stop debugging + user-mode threads. + + This function often gets called with uw_thread_active == 0. */ + static void uw_thread_new_objfile (struct objfile *objfile) { @@ -1050,9 +1003,8 @@ uw_thread_new_objfile (struct objfile *objfile) target_new_objfile_chain (objfile); } -/* - * Initialize uw_thread_ops. - */ +/* Initialize uw_thread_ops. */ + static void init_uw_thread_ops (void) { @@ -1078,10 +1030,9 @@ init_uw_thread_ops (void) uw_thread_ops.to_magic = OPS_MAGIC; } -/* - * Module startup initialization function, automagically called by - * init.c. - */ +/* Module startup initialization function, automagically called by + init.c. */ + void _initialize_uw_thread (void) { |