[asterisk-commits] tilghman: branch tilghman/better_backtrace_1.4 r297950 - /team/tilghman/bette...

[SVN commits to the Asterisk project]

Author: tilghman
Date: Thu Dec  9 02:30:31 2010
New Revision: 297950

URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=297950
Log:
Progress:  we now have module locals.  Onto core locals, next.

Modified:
    team/tilghman/better_backtrace_1.4/main/logger.c

Modified: team/tilghman/better_backtrace_1.4/main/logger.c
URL: http://svnview.digium.com/svn/asterisk/team/tilghman/better_backtrace_1.4/main/logger.c?view=diff&rev=297950&r1=297949&r2=297950
==============================================================================
--- team/tilghman/better_backtrace_1.4/main/logger.c (original)
+++ team/tilghman/better_backtrace_1.4/main/logger.c Thu Dec  9 02:30:31 2010
@@ -842,9 +842,13 @@
 	long allocsize;
 	asymbol **syms = NULL;
 	bfd_vma offset;
+	const char *last_slash;
+#if 0
 	asection *section;
-	const char *last_slash, *file, *func;
+	const char *file, *func;
 	unsigned int line;
+#endif
+	int j;
 #else
 	char **strings;
 #endif
@@ -854,25 +858,23 @@
 #if defined(HAVE_DLADDR) && defined(HAVE_BFD)
 		ast_log(LOG_DEBUG, "Got %d backtrace record%c\n", count, count != 1 ? 's' : ' ');
 		for (i = 0; i < count; i++) {
-			int found = 0;
+			int found = 0, symbolcount;
+			int bestmatch = -1;
+			long bestdiff = LONG_MAX;
 
 			if (!dladdr(addresses[i], &dli)) {
 				continue;
 			}
+			last_slash = strrchr(dli.dli_fname, '/');
 			if (	(bfdobj = bfd_openr(dli.dli_fname, NULL)) &&
 					bfd_check_format(bfdobj, bfd_object) &&
 					(allocsize = bfd_get_symtab_upper_bound(bfdobj)) > 0 &&
 					(syms = ast_malloc(allocsize)) &&
-					bfd_canonicalize_symtab(bfdobj, syms)) {
-
-				if (bfdobj->flags & BSF_DYNAMIC) {
-					/* Convert library symbols from absolute address to offset address */
-					offset = addresses[i] - dli.dli_fbase;
-				} else {
-					/* Core asterisk routine */
-					offset = addresses[i] - (void *) 0;
-				}
-
+					(symbolcount = bfd_canonicalize_symtab(bfdobj, syms))) {
+
+				offset = addresses[i] - dli.dli_fbase;
+
+#if 0
 				for (section = bfdobj->sections; section; section = section->next) {
 					if (	!bfd_get_section_flags(bfdobj, section) & SEC_ALLOC ||
 							section->vma > offset ||
@@ -904,8 +906,26 @@
 
 					break;
 				}
-			}
-			last_slash = strrchr(dli.dli_fname, '/');
+#else
+				for (j = 0; j < symbolcount; j++) {
+					asymbol *s = syms[j];
+					if (s->value + s->section->vma > offset) {
+						/* Past the symbol we want */
+						continue;
+					}
+					if (offset - (s->value + s->section->vma) < bestdiff) {
+						bestmatch = j;
+						bestdiff = offset - (s->value + s->section->vma);
+					}
+				}
+				found++;
+				ast_log(LOG_DEBUG, "#%d: [%08lX] %s %s (%08lX+%lX) %d\n", i,
+					(unsigned long) addresses[i],
+					last_slash ? last_slash + 1 : dli.dli_fname, syms[bestmatch]->name,
+					(unsigned long) dli.dli_saddr,
+					(unsigned long) (addresses[i] - dli.dli_saddr), j);
+#endif
+			}
 			if (bfdobj) {
 				bfd_close(bfdobj);
 				if (syms) {