diff options
Diffstat (limited to 'gdb/gcore.c')
| -rw-r--r-- | gdb/gcore.c | 493 |
1 files changed, 0 insertions, 493 deletions
diff --git a/gdb/gcore.c b/gdb/gcore.c deleted file mode 100644 index 56c1da414cd..00000000000 --- a/gdb/gcore.c +++ /dev/null @@ -1,493 +0,0 @@ -/* Generate a core file for the inferior process. - Copyright 2001, 2002 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. */ - -#include "defs.h" -#include "cli/cli-decode.h" -#include "inferior.h" -#include "gdbcore.h" -#include "elf-bfd.h" -#include <sys/procfs.h> -#include "symfile.h" -#include "objfiles.h" - -static char *default_gcore_target (void); -static enum bfd_architecture default_gcore_arch (void); -static unsigned long default_gcore_mach (void); -static int gcore_memory_sections (bfd *); - -/* Function: gcore_command - Generate a core file from the inferior process. */ - -static void -gcore_command (char *args, int from_tty) -{ - struct cleanup *old_chain; - char *corefilename, corefilename_buffer[40]; - asection *note_sec = NULL; - bfd *obfd; - void *note_data = NULL; - int note_size = 0; - - /* No use generating a corefile without a target process. */ - if (!(target_has_execution)) - noprocess (); - - if (args && *args) - corefilename = args; - else - { - /* Default corefile name is "core.PID". */ - sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid)); - corefilename = corefilename_buffer; - } - - if (info_verbose) - fprintf_filtered (gdb_stdout, - "Opening corefile '%s' for output.\n", corefilename); - - /* Open the output file. */ - if (!(obfd = bfd_openw (corefilename, NULL /*default_gcore_target ()*/))) - { - error ("Failed to open '%s' for output.", corefilename); - } - - /* Need a cleanup that will close the file (FIXME: delete it?). */ - old_chain = make_cleanup_bfd_close (obfd); - - bfd_set_format (obfd, bfd_core); - bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ()); - - /* An external target method must build the notes section. */ - note_data = (char *) target_make_corefile_notes (obfd, ¬e_size); - - /* Create the note section. */ - if (note_data != NULL && note_size != 0) - { - if ((note_sec = bfd_make_section_anyway (obfd, "note0")) == NULL) - error ("Failed to create 'note' section for corefile: %s", - bfd_errmsg (bfd_get_error ())); - - bfd_set_section_vma (obfd, note_sec, 0); - bfd_set_section_flags (obfd, note_sec, - SEC_HAS_CONTENTS | SEC_READONLY | SEC_ALLOC); - bfd_set_section_alignment (obfd, note_sec, 0); - bfd_set_section_size (obfd, note_sec, note_size); - } - - /* Now create the memory/load sections. */ - if (gcore_memory_sections (obfd) == 0) - error ("gcore: failed to get corefile memory sections from target."); - - /* Write out the contents of the note section. */ - if (note_data != NULL && note_size != 0) - { - if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size)) - { - warning ("writing note section (%s)", - bfd_errmsg (bfd_get_error ())); - } - } - - /* Succeeded. */ - fprintf_filtered (gdb_stdout, - "Saved corefile %s\n", corefilename); - - /* Clean-ups will close the output file and free malloc memory. */ - do_cleanups (old_chain); - return; -} - -static unsigned long -default_gcore_mach (void) -{ -#ifdef TARGET_ARCHITECTURE - const struct bfd_arch_info * bfdarch = TARGET_ARCHITECTURE; - - if (bfdarch != NULL) - return bfdarch->mach; -#endif - if (exec_bfd == NULL) - error ("Can't find default bfd machine type (need execfile)."); - - return bfd_get_mach (exec_bfd); -} - -static enum bfd_architecture -default_gcore_arch (void) -{ -#ifdef TARGET_ARCHITECTURE - const struct bfd_arch_info * bfdarch = TARGET_ARCHITECTURE; - - if (bfdarch != NULL) - return bfdarch->arch; -#endif - if (exec_bfd == NULL) - error ("Can't find bfd architecture for corefile (need execfile)."); - - return bfd_get_arch (exec_bfd); -} - -static char * -default_gcore_target (void) -{ - /* FIXME -- this may only work for ELF targets. */ - if (exec_bfd == NULL) - error ("Can't find default bfd target for corefile (need execfile)."); - - return bfd_get_target (exec_bfd); -} - -/* - * Default method for stack segment (preemptable by target). - */ - -static int (*override_derive_stack_segment) (bfd_vma *, bfd_vma *); - -extern void -preempt_derive_stack_segment (int (*override_func) (bfd_vma *, bfd_vma *)) -{ - override_derive_stack_segment = override_func; -} - -/* Function: default_derive_stack_segment - Derive a reasonable stack segment by unwinding the target stack. - - Returns 0 for failure, 1 for success. */ - -static int -default_derive_stack_segment (bfd_vma *bottom, bfd_vma *top) -{ - bfd_vma tmp_vma; - struct frame_info *fi, *tmp_fi; - - if (bottom == NULL || top == NULL) - return 0; /* Paranoia. */ - - if (!target_has_stack || !target_has_registers) - return 0; /* Can't succeed without stack and registers. */ - - if ((fi = get_current_frame ()) == NULL) - return 0; /* Can't succeed without current frame. */ - - /* Save frame pointer of TOS frame. */ - *top = fi->frame; - /* If current stack pointer is more "inner", use that instead. */ - if (INNER_THAN (read_sp (), *top)) - *top = read_sp (); - - /* Find prev-most frame. */ - while ((tmp_fi = get_prev_frame (fi)) != NULL) - fi = tmp_fi; - - /* Save frame pointer of prev-most frame. */ - *bottom = fi->frame; - - /* Now canonicalize their order, so that 'bottom' is a lower address - (as opposed to a lower stack frame). */ - if (*bottom > *top) - { - tmp_vma = *top; - *top = *bottom; - *bottom = tmp_vma; - } - - return 1; /* success */ -} - -static int -derive_stack_segment (bfd_vma *bottom, bfd_vma *top) -{ - if (override_derive_stack_segment) - return override_derive_stack_segment (bottom, top); - else - return default_derive_stack_segment (bottom, top); -} - -/* - * Default method for heap segment (preemptable by target). - */ - -static int (*override_derive_heap_segment) (bfd *, bfd_vma *, bfd_vma *); - -extern void -preempt_derive_heap_segment (int (*override_func) (bfd *, - bfd_vma *, bfd_vma *)) -{ - override_derive_heap_segment = override_func; -} - -/* Function: default_derive_heap_segment - Derive a reasonable heap segment by looking at sbrk and - the static data sections. - - Returns 0 for failure, 1 for success. */ - -static int -default_derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) -{ - bfd_vma top_of_data_memory = 0; - bfd_vma top_of_heap = 0; - bfd_size_type sec_size; - struct value *zero, *sbrk; - bfd_vma sec_vaddr; - asection *sec; - - if (bottom == NULL || top == NULL) - return 0; /* Paranoia. */ - - if (!target_has_execution) - return 0; /* This function depends on being able - to call a function in the inferior. */ - - /* Assumption: link map is arranged as follows (low to high addresses): - text sections - data sections (including bss) - heap - */ - - for (sec = abfd->sections; sec; sec = sec->next) - { - if (bfd_get_section_flags (abfd, sec) & SEC_DATA || - strcmp (".bss", bfd_get_section_name (abfd, sec)) == 0) - { - sec_vaddr = bfd_get_section_vma (abfd, sec); - sec_size = bfd_get_section_size_before_reloc (sec); - if (sec_vaddr + sec_size > top_of_data_memory) - top_of_data_memory = sec_vaddr + sec_size; - } - } - /* Now get the top-of-heap by calling sbrk in the inferior. */ - if ((sbrk = find_function_in_inferior ("sbrk")) == NULL) - return 0; - if ((zero = value_from_longest (builtin_type_int, (LONGEST) 0)) == NULL) - return 0; - if ((sbrk = call_function_by_hand (sbrk, 1, &zero)) == NULL) - return 0; - top_of_heap = value_as_long (sbrk); - - /* Return results. */ - if (top_of_heap > top_of_data_memory) - { - *bottom = top_of_data_memory; - *top = top_of_heap; - return 1; /* success */ - } - else - return 0; /* No additional heap space needs to be saved. */ -} - -static int -derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top) -{ - if (override_derive_heap_segment) - return override_derive_heap_segment (abfd, bottom, top); - else - return default_derive_heap_segment (abfd, bottom, top); -} - -/* ARGSUSED */ -static void -make_output_phdrs (bfd *obfd, asection *osec, void *ignored) -{ - int p_flags = 0; - int p_type; - - /* FIXME: these constants may only be applicable for ELF. */ - if (strncmp (osec->name, "load", 4) == 0) - p_type = PT_LOAD; - else - p_type = PT_NOTE; - - p_flags |= PF_R; /* Segment is readable. */ - if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY)) - p_flags |= PF_W; /* Segment is writable. */ - if (bfd_get_section_flags (obfd, osec) & SEC_CODE) - p_flags |= PF_X; /* Segment is executable. */ - - bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, - 0, 0, 1, &osec); -} - -static asection * -make_mem_sec (bfd *obfd, - bfd_vma addr, - bfd_size_type size, - unsigned int flags, - unsigned int alignment) -{ - asection *osec; - - if ((osec = bfd_make_section_anyway (obfd, "load")) == NULL) - { - warning ("Couldn't make gcore segment: %s", - bfd_errmsg (bfd_get_error ())); - return NULL; - } - - if (info_verbose) - { - fprintf_filtered (gdb_stdout, - "Save segment, %ld bytes at 0x%s\n", - size, paddr_nz (addr)); - } - - bfd_set_section_size (obfd, osec, size); - bfd_set_section_vma (obfd, osec, addr); - osec->lma = 0; /* FIXME: there should be a macro for this! */ - bfd_set_section_alignment (obfd, osec, alignment); - bfd_set_section_flags (obfd, osec, - flags | SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS); - return osec; -} - -static int -gcore_create_callback (CORE_ADDR vaddr, - unsigned long size, - int read, int write, int exec, - void *data) -{ - flagword flags = 0; - - if (write == 0) - { - flags |= SEC_READONLY; - /* Set size == zero for readonly sections. */ - size = 0; - } - if (exec) - { - flags |= SEC_CODE; - } - else - { - flags |= SEC_DATA; - } - - return ((make_mem_sec ((bfd *) data, vaddr, size, flags, 0)) == NULL); -} - -static int -objfile_find_memory_regions (int (*func) (CORE_ADDR, - unsigned long, - int, int, int, - void *), - void *obfd) -{ - /* Use objfile data to create memory sections. */ - struct objfile *objfile; - struct obj_section *objsec; - bfd_vma temp_bottom, temp_top; - - /* Call callback function for each objfile section. */ - ALL_OBJSECTIONS (objfile, objsec) - { - bfd *ibfd = objfile->obfd; - asection *isec = objsec->the_bfd_section; - flagword flags = bfd_get_section_flags (ibfd, isec); - int ret; - - if ((flags & SEC_ALLOC) || (flags & SEC_LOAD)) - { - int size = bfd_section_size (ibfd, isec); - int ret; - - if ((ret = (*func) (objsec->addr, - bfd_section_size (ibfd, isec), - 1, /* All sections will be readable. */ - (flags & SEC_READONLY) == 0, /* writable */ - (flags & SEC_CODE) != 0, /* executable */ - obfd)) != 0) - return ret; - } - } - - /* Make a stack segment. */ - if (derive_stack_segment (&temp_bottom, &temp_top)) - (*func) (temp_bottom, - temp_top - temp_bottom, - 1, /* Stack section will be readable */ - 1, /* Stack section will be writable */ - 0, /* Stack section will not be executable */ - obfd); - - /* Make a heap segment. */ - if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top)) - (*func) (temp_bottom, - temp_top - temp_bottom, - 1, /* Heap section will be readable */ - 1, /* Heap section will be writable */ - 0, /* Heap section will not be executable */ - obfd); - return 0; -} - -static void -gcore_copy_callback (bfd *obfd, asection *osec, void *ignored) -{ - bfd_size_type size = bfd_section_size (obfd, osec); - struct cleanup *old_chain = NULL; - void *memhunk; - - if (size == 0) - return; /* Read-only sections are marked as zero-size. - We don't have to copy their contents. */ - if (strncmp ("load", bfd_get_section_name (obfd, osec), 4) != 0) - return; /* Only interested in "load" sections. */ - - if ((memhunk = xmalloc (size)) == NULL) - error ("Not enough memory to create corefile."); - old_chain = make_cleanup (xfree, memhunk); - - if (target_read_memory (bfd_section_vma (obfd, osec), - memhunk, size) != 0) - warning ("Memory read failed for corefile section, %ld bytes at 0x%s\n", - (long) size, paddr (bfd_section_vma (obfd, osec))); - if (!bfd_set_section_contents (obfd, osec, memhunk, 0, size)) - warning ("Failed to write corefile contents (%s).", - bfd_errmsg (bfd_get_error ())); - - do_cleanups (old_chain); /* frees the xmalloc buffer */ -} - -static int -gcore_memory_sections (bfd *obfd) -{ - if (target_find_memory_regions (gcore_create_callback, obfd) != 0) - return 0; /* FIXME error return/msg? */ - - /* Record phdrs for section-to-segment mapping. */ - bfd_map_over_sections (obfd, make_output_phdrs, NULL); - - /* Copy memory region contents. */ - bfd_map_over_sections (obfd, gcore_copy_callback, NULL); - - return 1; /* success */ -} - -void -_initialize_gcore (void) -{ - add_com ("generate-core-file", class_files, gcore_command, - "Save a core file with the current state of the debugged process.\n\ -Argument is optional filename. Default filename is 'core.<process_id>'."); - - add_com_alias ("gcore", "generate-core-file", class_files, 1); - exec_set_find_memory_regions (objfile_find_memory_regions); -} |