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2018-04-17  Ian Lance Taylor  <iant@golang.org>

	* backtrace.c (backtrace_full): When testing whether we can
	allocate memory, call mmap directly, and munmap the memory.

2018-04-04  Jakub Jelinek  <jakub@redhat.com>

	PR other/85161
	* elf.c (elf_zlib_fetch): Fix up predefined macro names in test for
	big endian, only use 32-bit loads if endianity macros are predefined
	and indicate big or little endian.

2018-02-15  Jakub Jelinek  <jakub@redhat.com>

	PR other/82368
	* elf.c (SHT_PROGBITS): Undefine and define.

2018-02-14  Jakub Jelinek  <jakub@redhat.com>

	PR other/82368
	* elf.c (EM_PPC64, EF_PPC64_ABI): Undefine and define.
	(struct elf_ppc64_opd_data): New type.
	(elf_initialize_syminfo): Add opd argument, handle symbols
	pointing into the PowerPC64 ELFv1 .opd section.
	(elf_add): Read .opd section on PowerPC64 ELFv1, pass pointer
	to structure with .opd data to elf_initialize_syminfo.

2018-01-19  Tony Reix  <tony.reix@atos.net>

	* xcoff.c (xcoff_incl_compare): New function.
	(xcoff_incl_search): New function.
	(xcoff_process_linenos): Use bsearch to find include file.
	(xcoff_initialize_fileline): Sort include file information.

Fixes #13
This commit is contained in:
Ian Lance Taylor
2018-04-17 07:04:02 -07:00
parent 177940370e
commit 012b950b37
3 changed files with 146 additions and 24 deletions
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44
backtrace.c
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@@ -32,12 +32,26 @@ POSSIBILITY OF SUCH DAMAGE. */
#include "config.h"
#include <unistd.h>
#include <sys/types.h>
#if !BACKTRACE_USES_MALLOC
#include <sys/mman.h>
#endif
#include "unwind.h"
#include "backtrace.h"
#include "backtrace-supported.h"
#include "internal.h"
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
/* The main backtrace_full routine. */
/* Data passed through _Unwind_Backtrace. */
@@ -104,7 +118,6 @@ backtrace_full (struct backtrace_state *state, int skip,
backtrace_error_callback error_callback, void *data)
{
struct backtrace_data bdata;
void *p;
bdata.skip = skip + 1;
bdata.state = state;
@@ -113,16 +126,25 @@ backtrace_full (struct backtrace_state *state, int skip,
bdata.data = data;
bdata.ret = 0;
/* If we can't allocate any memory at all, don't try to produce
file/line information. */
p = backtrace_alloc (state, 4096, NULL, NULL);
if (p == NULL)
bdata.can_alloc = 0;
else
{
backtrace_free (state, p, 4096, NULL, NULL);
bdata.can_alloc = 1;
}
#if !BACKTRACE_USES_MALLOC
{
size_t pagesize;
void *page;
/* If we can't allocate any memory at all, don't try to produce
file/line information. */
pagesize = getpagesize ();
page = mmap (NULL, pagesize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (page == MAP_FAILED)
bdata.can_alloc = 0;
else
{
munmap (page, pagesize);
bdata.can_alloc = 1;
}
}
#endif
_Unwind_Backtrace (unwind, &bdata);
return bdata.ret;