another backtrace resolver that prints source file name and line number

config.h.cmake

@@ -28,6 +28,7 @@
 #cmakedefine HAVE_CRYPT_H 1
 #cmakedefine HAVE_CURSES_H 1
 #cmakedefine HAVE_CXXABI_H 1
+#cmakedefine HAVE_BFD_H 1
 #cmakedefine HAVE_NCURSES_H 1
 #cmakedefine HAVE_NDIR_H 1
 #cmakedefine HAVE_DIRENT_H 1

configure.cmake

@@ -186,6 +186,7 @@ CHECK_INCLUDE_FILES (aio.h HAVE_AIO_H)
 CHECK_INCLUDE_FILES (arpa/inet.h HAVE_ARPA_INET_H)
 CHECK_INCLUDE_FILES (crypt.h HAVE_CRYPT_H)
 CHECK_INCLUDE_FILES (cxxabi.h HAVE_CXXABI_H)
+CHECK_INCLUDE_FILES (bfd.h HAVE_BFD_H)
 CHECK_INCLUDE_FILES (dirent.h HAVE_DIRENT_H)
 CHECK_INCLUDE_FILES (dlfcn.h HAVE_DLFCN_H)
 CHECK_INCLUDE_FILES (execinfo.h HAVE_EXECINFO_H)

include/my_stacktrace.h

@@ -55,6 +55,24 @@ void my_set_exception_pointers(EXCEPTION_POINTERS *ep);
 #endif
 #endif
 
+#ifndef SAFEMALLOC
+#undef HAVE_BFD_H
+#endif
+
+#ifdef HAVE_BFD_H
+#define HAVE_MY_ADDR_RESOLVE 1
+#endif
+
+#ifdef HAVE_MY_ADDR_RESOLVE
+typedef struct {
+  const char *file;
+  const char *func;
+  uint line;
+} my_addr_loc;
+int my_addr_resolve(void *ptr, my_addr_loc *loc);
+const char *my_addr_resolve_init();
+#endif
+
 #ifdef HAVE_WRITE_CORE
 void my_write_core(int sig);
 #endif

mysql-test/mysql-test-run.pl

@@ -4660,7 +4660,7 @@ sub extract_warning_lines ($$) {
   $Ferr = undef; # Close error log file
 
   # mysql_client_test.test sends a COM_DEBUG packet to the server
-  # to provoke a SAFEMALLOC leak report, ignore any warnings
+  # to provoke a safemalloc leak report, ignore any warnings
   # between "Begin/end safemalloc memory dump"
   if ( grep(/Begin safemalloc memory dump:/, @lines) > 0)
   {

mysys/CMakeLists.txt

@@ -33,6 +33,7 @@ SET(MYSYS_SOURCES  array.c charset-def.c charset.c checksum.c default.c
 				rijndael.c sha1.c string.c thr_alarm.c thr_lock.c thr_mutex.c
 				thr_rwlock.c tree.c typelib.c base64.c my_memmem.c my_getpagesize.c
 				lf_alloc-pin.c lf_dynarray.c lf_hash.c
+                                my_addr_resolve.c
 				my_atomic.c my_getncpus.c my_safehash.c my_chmod.c my_rnd.c
                                 my_uuid.c wqueue.c waiting_threads.c ma_dyncol.c
 				my_rdtsc.c)
@@ -70,6 +71,10 @@ TARGET_LINK_LIBRARIES(mysys dbug strings ${ZLIB_LIBRARY}
  ${LIBNSL} ${LIBM} ${LIBRT})
 DTRACE_INSTRUMENT(mysys)
 
+IF(HAVE_BFD_H)
+  TARGET_LINK_LIBRARIES(mysys bfd)  
+ENDIF(HAVE_BFD_H)
+
 IF (WIN32)
   TARGET_LINK_LIBRARIES(mysys IPHLPAPI)  
 ENDIF(WIN32)

mysys/my_addr_resolve.c

+/* Copyright (C) 2011 Monty Program Ab
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+#include "mysys_priv.h"
+#include <m_string.h>
+#include <my_sys.h>
+#include <my_stacktrace.h>
+
+/**
+  strip the path, leave the file name and the last dirname
+*/
+static const char *strip_path(const char *s)
+{
+  const char *prev, *last;
+  for(prev= last= s; *s; s++)
+    if (*s == '/' || *s == '\\')
+    {
+      prev= last;
+      last= s + 1;
+    }
+  return prev;
+}
+
+/*
+  The following is very much single-threaded code and it's only supposed
+  to be used on shutdown or for a crash report
+  Or the caller should take care and use mutexes.
+
+  Also it does not free any its memory. For the same reason -
+  it's only used for crash reports or on shutdown when we already
+  have a memory leak.
+*/
+
+#ifdef HAVE_BFD_H
+#include <bfd.h>
+static bfd *bfdh= 0;
+static asymbol **symtable= 0;
+
+/**
+  finds a file name, a line number, and a function name corresponding to addr.
+
+  the function name is demangled.
+  the file name is stripped of its path, only the two last components are kept
+  the resolving logic is mostly based on addr2line of binutils-2.17
+
+  @return 0 on success, 1 on failure
+*/
+int my_addr_resolve(void *ptr, my_addr_loc *loc)
+{
+  bfd_vma addr= (intptr)ptr;
+  asection *sec;
+
+  for (sec= bfdh->sections; sec; sec= sec->next)
+  {
+    bfd_vma start;
+
+    if ((bfd_get_section_flags(bfdh, sec) & SEC_ALLOC) == 0)
+      continue;
+
+    start = bfd_get_section_vma(bfdh, sec);
+    if (addr < start || addr >= start + bfd_get_section_size(sec))
+      continue;
+
+    if (bfd_find_nearest_line(bfdh, sec, symtable, addr - start,
+                              &loc->file, &loc->func, &loc->line))
+    {
+      if (loc->file)
+        loc->file= strip_path(loc->file);
+      else
+        loc->file= "";
+
+      if (loc->func)
+      {
+        const char *str= bfd_demangle(bfdh, loc->func, 3);
+        if (str)
+          loc->func= str;
+      }
+
+      return 0;
+    }
+  }
+  
+  return 1;
+}
+
+const char *my_addr_resolve_init()
+{
+  if (!bfdh)
+  {
+    uint unused;
+    char **matching;
+
+    bfdh= bfd_openr(my_progname, NULL);
+    if (!bfdh)
+      goto err;
+
+    if (bfd_check_format(bfdh, bfd_archive))
+      goto err;
+    if (!bfd_check_format_matches (bfdh, bfd_object, &matching))
+      goto err;
+
+    if (bfd_read_minisymbols(bfdh, FALSE, (void *)&symtable, &unused) < 0)
+      goto err;
+  }
+  return 0;
+
+err:
+  return bfd_errmsg(bfd_get_error());
+}
+#elif defined(HAVE_LIBELF_H)
+/*
+  another possible implementation.
+*/
+#elif defined(MY_ADDR_RESOLVE_FORK)
+/*
+  yet another - just execute addr2line or eu-addr2line, whatever available,
+  pipe the addresses to it, and parse the output
+*/
+#endif

mysys/stacktrace.c

@@ -210,25 +210,52 @@ static void my_demangle_symbols(char **addrs, int n)
 
 #endif /* BACKTRACE_DEMANGLE */
 
+#if HAVE_MY_ADDR_RESOLVE
+static int print_with_addr_resolve(void **addrs, int n)
+{
+  int i;
+  const char *err;
+
+  if ((err= my_addr_resolve_init()))
+  {
+    fprintf(stderr, "(my_addr_resolve failure: %s)\n", err);
+    return 0;
+  }
+
+  for (i= 0; i < n; i++)
+  {
+    my_addr_loc loc;
+    if (my_addr_resolve(addrs[i], &loc))
+      backtrace_symbols_fd(addrs+i, 1, fileno(stderr));
+    else
+      fprintf(stderr, "%s:%u(%s)[%p]\n",
+              loc.file, loc.line, loc.func, addrs[i]);
+  }
+  return 1;
+}
+#endif
+
 void my_print_stacktrace(uchar* stack_bottom, ulong thread_stack)
 {
   void *addrs[128];
-  char **strings= NULL;
+  char **strings __attribute__((unused)) = NULL;
   int n = backtrace(addrs, array_elements(addrs));
   fprintf(stderr, "stack_bottom = %p thread_stack 0x%lx\n",
           stack_bottom, thread_stack);
+#if HAVE_MY_ADDR_RESOLVE
+  if (print_with_addr_resolve(addrs, n))
+    return;
+#endif
 #if BACKTRACE_DEMANGLE
   if ((strings= backtrace_symbols(addrs, n)))
   {
     my_demangle_symbols(strings, n);
     free(strings);
+    return;
   }
 #endif
 #if HAVE_BACKTRACE_SYMBOLS_FD
-  if (!strings)
-  {
-    backtrace_symbols_fd(addrs, n, fileno(stderr));
-  }
+  backtrace_symbols_fd(addrs, n, fileno(stderr));
 #endif
 }