diff options
Diffstat (limited to 'libbacktrace/fileline.c')
| -rw-r--r-- | libbacktrace/fileline.c | 63 |
1 files changed, 58 insertions, 5 deletions
diff --git a/libbacktrace/fileline.c b/libbacktrace/fileline.c index e577ecc9061..1ade81e9d49 100644 --- a/libbacktrace/fileline.c +++ b/libbacktrace/fileline.c @@ -34,12 +34,17 @@ POSSIBILITY OF SUCH DAMAGE. */ #include <sys/types.h> #include <sys/stat.h> +#include <errno.h> #include <fcntl.h> #include <stdlib.h> #include "backtrace.h" #include "internal.h" +#ifndef HAVE_GETEXECNAME +#define getexecname() NULL +#endif + /* Initialize the fileline information from the executable. Returns 1 on success, 0 on failure. */ @@ -49,6 +54,8 @@ fileline_initialize (struct backtrace_state *state, { int failed; fileline fileline_fn; + int pass; + int called_error_callback; int descriptor; failed = state->fileline_initialization_failed; @@ -79,12 +86,58 @@ fileline_initialize (struct backtrace_state *state, /* We have not initialized the information. Do it now. */ - if (state->filename != NULL) - descriptor = backtrace_open (state->filename, error_callback, data, NULL); - else - descriptor = backtrace_open ("/proc/self/exe", error_callback, data, NULL); + descriptor = -1; + called_error_callback = 0; + for (pass = 0; pass < 4; ++pass) + { + const char *filename; + int does_not_exist; + + switch (pass) + { + case 0: + filename = state->filename; + break; + case 1: + filename = getexecname (); + break; + case 2: + filename = "/proc/self/exe"; + break; + case 3: + filename = "/proc/curproc/file"; + break; + default: + abort (); + } + + if (filename == NULL) + continue; + + descriptor = backtrace_open (filename, error_callback, data, + &does_not_exist); + if (descriptor < 0 && !does_not_exist) + { + called_error_callback = 1; + break; + } + if (descriptor >= 0) + break; + } + if (descriptor < 0) - failed = 1; + { + if (!called_error_callback) + { + if (state->filename != NULL) + error_callback (data, state->filename, ENOENT); + else + error_callback (data, + "libbacktrace could not find executable to open", + 0); + } + failed = 1; + } if (!failed) { |