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libbacktrace: fetch executable path on macOS

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PR libbacktrace/96973
	* fileline.c (macho_get_executable_path): New static function.
	(fileline_initialize): Call macho_get_executable_path.
This commit is contained in:
Ian Lance Taylor 2020-09-08 19:09:21 -07:00
parent 0755f573f0
commit 181f877b6c
1 changed files with 37 additions and 1 deletions
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38
libbacktrace/fileline.c
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@ -43,6 +43,10 @@ POSSIBILITY OF SUCH DAMAGE. */
#include <sys/sysctl.h>
#endif
#ifdef HAVE_MACH_O_DYLD_H
#include <mach-o/dyld.h>
#endif
#include "backtrace.h"
#include "internal.h"
@ -122,6 +126,35 @@ sysctl_exec_name2 (struct backtrace_state *state,
#endif /* defined (HAVE_KERN_PROC_ARGS) || |defined (HAVE_KERN_PROC) */
#ifdef HAVE_MACH_O_DYLD_H
static char *
macho_get_executable_path (struct backtrace_state *state,
backtrace_error_callback error_callback, void *data)
{
uint32_t len;
char *name;
len = 0;
if (_NSGetExecutablePath (NULL, &len) == 0)
return NULL;
name = (char *) backtrace_alloc (state, len, error_callback, data);
if (name == NULL)
return NULL;
if (_NSGetExecutablePath (name, &len) != 0)
{
backtrace_free (state, name, len, error_callback, data);
return NULL;
}
return name;
}
#else /* !defined (HAVE_MACH_O_DYLD_H) */
#define macho_get_executable_path(state, error_callback, data) NULL
#endif /* !defined (HAVE_MACH_O_DYLD_H) */
/* Initialize the fileline information from the executable. Returns 1
on success, 0 on failure. */
@ -159,7 +192,7 @@ fileline_initialize (struct backtrace_state *state,
descriptor = -1;
called_error_callback = 0;
for (pass = 0; pass < 7; ++pass)
for (pass = 0; pass < 8; ++pass)
{
int does_not_exist;
@ -188,6 +221,9 @@ fileline_initialize (struct backtrace_state *state,
case 6:
filename = sysctl_exec_name2 (state, error_callback, data);
break;
case 7:
filename = macho_get_executable_path (state, error_callback, data);
break;
default:
abort ();
}