/* Generate a core file for the inferior process.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 2001-2012 Free Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "gdbcore.h"
#include "objfiles.h"
+#include "solib.h"
#include "symfile.h"
-
+#include "arch-utils.h"
+#include "completer.h"
+#include "gcore.h"
#include "cli/cli-decode.h"
-
#include "gdb_assert.h"
+#include <fcntl.h>
+#include "regcache.h"
+#include "regset.h"
+#include "gdb_bfd.h"
/* The largest amount of memory to read from the target at once. We
must throttle it to limit the amount of memory used by GDB during
generate-core-file for programs with large resident data. */
#define MAX_COPY_BYTES (1024 * 1024)
-static char *default_gcore_target (void);
+static const 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 *);
-/* Generate a core file from the inferior process. */
+/* create_gcore_bfd -- helper for gcore_command (exported).
+ Open a new bfd core file for output, and return the handle. */
+
+bfd *
+create_gcore_bfd (char *filename)
+{
+ bfd *obfd = gdb_bfd_openw (filename, default_gcore_target ());
+
+ if (!obfd)
+ error (_("Failed to open '%s' for output."), filename);
+ bfd_set_format (obfd, bfd_core);
+ bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ());
+ return obfd;
+}
+
+/* write_gcore_file -- helper for gcore_command (exported).
+ Compose and write the corefile data to the core file. */
+
+
+void
+write_gcore_file (bfd *obfd)
+{
+ void *note_data = NULL;
+ int note_size = 0;
+ asection *note_sec = NULL;
+
+ /* An external target method must build the notes section. */
+ /* FIXME: uweigand/2011-10-06: All architectures that support core file
+ generation should be converted to gdbarch_make_corefile_notes; at that
+ point, the target vector method can be removed. */
+ if (!gdbarch_make_corefile_notes_p (target_gdbarch))
+ note_data = target_make_corefile_notes (obfd, ¬e_size);
+ else
+ note_data = gdbarch_make_corefile_notes (target_gdbarch, obfd, ¬e_size);
+
+ if (note_data == NULL || note_size == 0)
+ error (_("Target does not support core file generation."));
+
+ /* Create the note section. */
+ note_sec = bfd_make_section_anyway_with_flags (obfd, "note0",
+ SEC_HAS_CONTENTS
+ | SEC_READONLY
+ | SEC_ALLOC);
+ if (note_sec == 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_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 (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size))
+ warning (_("writing note section (%s)"), bfd_errmsg (bfd_get_error ()));
+}
+
+static void
+do_bfd_delete_cleanup (void *arg)
+{
+ bfd *obfd = arg;
+ const char *filename = obfd->filename;
+
+ gdb_bfd_unref (arg);
+ unlink (filename);
+}
+
+/* gcore_command -- implements the '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)
"Opening corefile '%s' for output.\n", corefilename);
/* Open the output file. */
- obfd = bfd_openw (corefilename, default_gcore_target ());
- if (!obfd)
- 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 = target_make_corefile_notes (obfd, ¬e_size);
+ obfd = create_gcore_bfd (corefilename);
- /* Create the note section. */
- if (note_data != NULL && note_size != 0)
- {
- note_sec = bfd_make_section_anyway_with_flags (obfd, "note0",
- SEC_HAS_CONTENTS
- | SEC_READONLY
- | SEC_ALLOC);
- if (note_sec == 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_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."));
+ /* Need a cleanup that will close and delete the file. */
+ old_chain = make_cleanup (do_bfd_delete_cleanup, obfd);
- /* 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 ()));
- }
+ /* Call worker function. */
+ write_gcore_file (obfd);
/* 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;
+ discard_cleanups (old_chain);
+ gdb_bfd_unref (obfd);
}
static unsigned long
return 0;
#else
- const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (current_gdbarch);
+ const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch);
if (bfdarch != NULL)
return bfdarch->mach;
static enum bfd_architecture
default_gcore_arch (void)
{
- const struct bfd_arch_info * bfdarch = gdbarch_bfd_arch_info
- (current_gdbarch);
+ const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch);
if (bfdarch != NULL)
return bfdarch->arch;
return bfd_get_arch (exec_bfd);
}
-static char *
+static const char *
default_gcore_target (void)
{
- /* FIXME: This may only work for ELF targets. */
+ /* The gdbarch may define a target to use for core files. */
+ if (gdbarch_gcore_bfd_target_p (target_gdbarch))
+ return gdbarch_gcore_bfd_target (target_gdbarch);
+
+ /* Otherwise, try to fall back to the exec_bfd target. This will probably
+ not work for non-ELF targets. */
if (exec_bfd == NULL)
return NULL;
else
return 1;
}
+/* call_target_sbrk --
+ helper function for derive_heap_segment. */
+
+static bfd_vma
+call_target_sbrk (int sbrk_arg)
+{
+ struct objfile *sbrk_objf;
+ struct gdbarch *gdbarch;
+ bfd_vma top_of_heap;
+ struct value *target_sbrk_arg;
+ struct value *sbrk_fn, *ret;
+ bfd_vma tmp;
+
+ if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL)
+ {
+ sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf);
+ if (sbrk_fn == NULL)
+ return (bfd_vma) 0;
+ }
+ else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL)
+ {
+ sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf);
+ if (sbrk_fn == NULL)
+ return (bfd_vma) 0;
+ }
+ else
+ return (bfd_vma) 0;
+
+ gdbarch = get_objfile_arch (sbrk_objf);
+ target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int,
+ sbrk_arg);
+ gdb_assert (target_sbrk_arg);
+ ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg);
+ if (ret == NULL)
+ return (bfd_vma) 0;
+
+ tmp = value_as_long (ret);
+ if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff)
+ return (bfd_vma) 0;
+
+ top_of_heap = tmp;
+ return top_of_heap;
+}
+
/* Derive a reasonable heap segment for ABFD by looking at sbrk and
the static data sections. Store its limits in *BOTTOM and *TOP.
Return non-zero if successful. */
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;
}
}
- /* Now get the top-of-heap by calling sbrk in the inferior. */
- if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL)
- {
- sbrk = find_function_in_inferior ("sbrk");
- if (sbrk == NULL)
- return 0;
- }
- else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL)
- {
- sbrk = find_function_in_inferior ("_sbrk");
- if (sbrk == NULL)
- return 0;
- }
- else
+ top_of_heap = call_target_sbrk (0);
+ if (top_of_heap == (bfd_vma) 0)
return 0;
- zero = value_from_longest (builtin_type_int, 0);
- gdb_assert (zero);
- sbrk = call_function_by_hand (sbrk, 1, &zero);
- if (sbrk == NULL)
- return 0;
- top_of_heap = value_as_long (sbrk);
-
/* Return results. */
if (top_of_heap > top_of_data_memory)
{
make_output_phdrs (bfd *obfd, asection *osec, void *ignored)
{
int p_flags = 0;
- int p_type;
+ int p_type = 0;
/* FIXME: these constants may only be applicable for ELF. */
if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0)
p_type = PT_LOAD;
- else
+ else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0)
p_type = PT_NOTE;
+ else
+ p_type = PT_NULL;
p_flags |= PF_R; /* Segment is readable. */
if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY))
{
if (info_verbose)
{
- fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at 0x%s\n",
- plongest (size), paddr_nz (vaddr));
+ fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n",
+ plongest (size), paddress (target_gdbarch, vaddr));
}
return 0;
}
- if (write == 0)
+ if (write == 0 && !solib_keep_data_in_core (vaddr, size))
{
/* See if this region of memory lies inside a known file on disk.
If so, we can avoid copying its contents by clearing SEC_LOAD. */
asec);
bfd_vma start = obj_section_addr (objsec) & -align;
bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align;
+
/* Match if either the entire memory region lies inside the
section (i.e. a mapping covering some pages of a large
segment) or the entire section lies inside the memory region
|| (start >= vaddr && end <= vaddr + size))
&& !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY))
{
- flags &= ~SEC_LOAD;
- flags |= SEC_NEVER_LOAD;
- goto keep; /* break out of two nested for loops */
+ flags &= ~(SEC_LOAD | SEC_HAS_CONTENTS);
+ goto keep; /* Break out of two nested for loops. */
}
}
if (info_verbose)
{
- fprintf_filtered (gdb_stdout, "Save segment, %s bytes at 0x%s\n",
- plongest (size), paddr_nz (vaddr));
+ fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n",
+ plongest (size), paddress (target_gdbarch, vaddr));
}
bfd_set_section_size (obfd, osec, size);
}
static int
-objfile_find_memory_regions (int (*func) (CORE_ADDR, unsigned long,
- int, int, int, void *),
- void *obfd)
+objfile_find_memory_regions (find_memory_region_ftype func, void *obfd)
{
/* Use objfile data to create memory sections. */
struct objfile *objfile;
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;
- ret = (*func) (obj_section_addr (objsec), bfd_section_size (ibfd, isec),
+ ret = (*func) (obj_section_addr (objsec), size,
1, /* All sections will be readable. */
(flags & SEC_READONLY) == 0, /* Writable. */
(flags & SEC_CODE) != 0, /* Executable. */
0, /* Stack section will not be executable. */
obfd);
- /* Make a heap segment. */
+ /* 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. */
size = min (total_size, MAX_COPY_BYTES);
memhunk = xmalloc (size);
- /* ??? This is crap since xmalloc should never return NULL. */
- if (memhunk == NULL)
- error (_("Not enough memory to create corefile."));
old_chain = make_cleanup (xfree, memhunk);
while (total_size > 0)
if (target_read_memory (bfd_section_vma (obfd, osec) + offset,
memhunk, size) != 0)
{
- warning (_("Memory read failed for corefile section, %s bytes at 0x%s."),
- plongest (size), paddr (bfd_section_vma (obfd, osec)));
+ warning (_("Memory read failed for corefile "
+ "section, %s bytes at %s."),
+ plongest (size),
+ paddress (target_gdbarch, bfd_section_vma (obfd, osec)));
break;
}
if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size))
static int
gcore_memory_sections (bfd *obfd)
{
- if (target_find_memory_regions (gcore_create_callback, obfd) != 0)
- return 0; /* FIXME: error return/msg? */
+ /* Try gdbarch method first, then fall back to target method. */
+ if (!gdbarch_find_memory_regions_p (target_gdbarch)
+ || gdbarch_find_memory_regions (target_gdbarch,
+ gcore_create_callback, obfd) != 0)
+ {
+ 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);
return 1;
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_gcore;
+
void
_initialize_gcore (void)
{
projects / deliverable / binutils-gdb.git / blobdiff