Make it trivial to get stack traces from external programs.

To get a stacktrace in a program like aria_chk, one only have to do:

#include <my_stacktrace.h>

call my_init_stacktrace(1) in main().

CMakeLists.txt

@@ -16,6 +16,11 @@
 
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8.7)
 
+# Remove the following comment if you don't want to have striped binaries
+# in RPM's:
+
+#set(CPACK_RPM_SPEC_MORE_DEFINE "%define __spec_install_post /bin/true")
+
 IF(POLICY CMP0022)
   CMAKE_POLICY(SET CMP0022 NEW)
 ENDIF()

client/mysqltest.cc

@@ -9116,7 +9116,7 @@ static void init_signal_handling(void)
   DBUG_ENTER("init_signal_handling");
 
 #ifdef HAVE_STACKTRACE
-  my_init_stacktrace();
+  my_init_stacktrace(0);
 #endif
 
   sa.sa_flags = SA_RESETHAND | SA_NODEFER;

include/my_stacktrace.h

@@ -41,7 +41,7 @@
 C_MODE_START
 
 #if defined(HAVE_STACKTRACE) || defined(HAVE_BACKTRACE)
-void my_init_stacktrace();
+void my_init_stacktrace(int setup_handlers);
 void my_print_stacktrace(uchar* stack_bottom, ulong thread_stack,
                          my_bool silent);
 int my_safe_print_str(const char* val, size_t max_len);
@@ -53,7 +53,7 @@ char *my_demangle(const char *mangled_name, int *status);
 void my_set_exception_pointers(EXCEPTION_POINTERS *ep);
 #endif /* __WIN__ */
 #else
-#define my_init_stacktrace() do { } while(0)
+#define my_init_stacktrace(A) do { } while(0)
 #endif /* ! (defined(HAVE_STACKTRACE) || defined(HAVE_BACKTRACE)) */
 
 #ifndef _WIN32

mysql-test/suite/maria/maria-autozerofill.test

@@ -115,7 +115,14 @@ check table t5;
 
 # Check that if we zerofill with aria_chk, we should not get any warnings when
 # accessing the table
+--error 0,1,11,139
 --exec $MARIA_CHK --ignore-control-file --zerofill $MYSQLD_DATADIR/mysqltest/t6 >$MYSQLTEST_VARDIR/tmp/autozerofill.txt 2>&1
+if ($sys_errno != 0)
+{
+--cat_file $MYSQLTEST_VARDIR/tmp/autozerofill.txt
+--die
+}
+
 select * from t6;
 check table t6;
 

mysys/my_addr_resolve.c

@@ -191,7 +191,9 @@ int start_addr2line_fork(const char *binary_path)
   return 0;
 }
 
-int my_addr_resolve(void *ptr, my_addr_loc *loc)
+static int first_error= 0;
+
+static int addr_resolve(void *ptr, my_addr_loc *loc)
 {
   char input[32];
   size_t len;
@@ -206,29 +208,13 @@ int my_addr_resolve(void *ptr, my_addr_loc *loc)
   int filename_start = -1;
   int line_number_start = -1;
 
-  Dl_info info;
-  void *offset;
-
-  if (!dladdr(ptr, &info))
-    return 1;
-
-  if (strcmp(addr2line_binary, info.dli_fname))
-  {
-    /* We use dli_fname in case the path is longer than the length of our static
-       string. We don't want to allocate anything dynamicaly here as we are in
-       a "crashed" state. */
-    if (start_addr2line_fork(info.dli_fname))
-    {
-      addr2line_binary[0] = '\0';
-      return 2;
-    }
-    /* Save result for future comparisons. */
-    strnmov(addr2line_binary, info.dli_fname, sizeof(addr2line_binary));
-  }
-  offset = info.dli_fbase;
-  len= my_snprintf(input, sizeof(input), "%08x\n", (ulonglong)(ptr - offset));
+  len= my_snprintf(input, sizeof(input), "%p\n", ptr);
   if (write(in[1], input, len) <= 0)
+  {
+    if (!first_error++)
+      fputs("Printing to addr2line failed\n", stderr);
     return 3;
+  }
 
   FD_ZERO(&set);
   FD_SET(out[0], &set);
@@ -278,7 +264,7 @@ int my_addr_resolve(void *ptr, my_addr_loc *loc)
   loc->line= atoi(output + line_number_start);
 
   /* Addr2line was unable to extract any meaningful information. */
-  if (strcmp(loc->file, "??") == 0)
+  if (strcmp(loc->file, "??") == 0 && loc->func[0] == '?')
     return 6;
 
   loc->file= strip_path(loc->file);
@@ -286,6 +272,42 @@ int my_addr_resolve(void *ptr, my_addr_loc *loc)
   return 0;
 }
 
+
+int my_addr_resolve(void *ptr, my_addr_loc *loc)
+{
+  Dl_info info;
+  int error;
+
+  if (!dladdr(ptr, &info))
+    return 1;
+
+  if (strcmp(addr2line_binary, info.dli_fname))
+  {
+    /*
+      We use dli_fname in case the path is longer than the length of
+      our static string. We don't want to allocate anything
+      dynamicaly here as we are in a "crashed" state.
+    */
+    if (start_addr2line_fork(info.dli_fname))
+    {
+      if (!first_error++)
+        fputs("Can't start addr2line\n", stderr);
+      addr2line_binary[0] = '\0';
+      return 2;
+    }
+    /* Save result for future comparisons. */
+    strnmov(addr2line_binary, info.dli_fname, sizeof(addr2line_binary));
+  }
+  if (!(error= addr_resolve(ptr, loc)))
+    return 0;
+#ifdef EXTRA_RESOLVE
+  if (!(error= addr_resolve((void*) (ptr - info.dli_fbase), loc)))
+    return 0;
+#endif
+  return error;
+}
+
+
 const char *my_addr_resolve_init()
 {
   return 0;

mysys/stacktrace.c

@@ -14,12 +14,11 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
-#include <my_global.h>
+#include "mysys_priv.h"
 #include <my_stacktrace.h>
 
 #ifndef __WIN__
 #include <signal.h>
-#include <my_pthread.h>
 #include <m_string.h>
 #ifdef HAVE_STACKTRACE
 #include <unistd.h>
@@ -42,11 +41,49 @@ static char *heap_start;
 extern char *__bss_start;
 #endif
 
-void my_init_stacktrace()
+/**
+   Default handler for printing stacktrace
+*/
+
+static sig_handler default_handle_fatal_signal(int sig)
+{
+  my_safe_printf_stderr("%s: Got signal %d. Attempting backtrace\n",
+                        my_progname_short, sig);
+  my_print_stacktrace(0,0,1);
+#ifndef __WIN__
+  signal(sig, SIG_DFL);
+  kill(getpid(), sig);
+#endif /* __WIN__ */
+  return;
+}
+
+
+/**
+   Initialize priting off stacktrace at signal
+
+   @param setup_handlers 0 only initialize variables
+                         1 setup signal handlers for stacktrace printing
+*/
+
+void my_init_stacktrace(int setup_handlers)
 {
 #if(defined HAVE_BSS_START) && !(defined __linux__)
   heap_start = (char*) &__bss_start;
 #endif
+  if (setup_handlers)
+  {
+    struct sigaction sa;
+    sa.sa_flags = SA_RESETHAND | SA_NODEFER;
+    sigemptyset(&sa.sa_mask);
+    sa.sa_handler= default_handle_fatal_signal;
+    sigaction(SIGSEGV, &sa, NULL);
+    sigaction(SIGABRT, &sa, NULL);
+#ifdef SIGBUS
+    sigaction(SIGBUS, &sa, NULL);
+#endif
+    sigaction(SIGILL, &sa, NULL);
+    sigaction(SIGFPE, &sa, NULL);
+  }
 }
 
 #ifdef __linux__
@@ -510,7 +547,7 @@ static EXCEPTION_POINTERS *exception_ptrs;
 #define MODULE64_SIZE_WINXP 576
 #define STACKWALK_MAX_FRAMES 64
 
-void my_init_stacktrace()
+void my_init_stacktrace(int setup_handlers __attribute__((unused)))
 {
 }
 

sql/mysqld.cc

@@ -2995,7 +2995,7 @@ void init_signals(void)
     sigemptyset(&sa.sa_mask);
     sigprocmask(SIG_SETMASK,&sa.sa_mask,NULL);
 
-    my_init_stacktrace();
+    my_init_stacktrace(0);
 #if defined(__amiga__)
     sa.sa_handler=(void(*)())handle_fatal_signal;
 #else

storage/maria/maria_chk.c

@@ -26,6 +26,9 @@
 #ifdef HAVE_SYS_MMAN_H
 #include <sys/mman.h>
 #endif
+/* Remove next line if you want aria_chk to produce a stack trace */
+#undef HAVE_BACKTRACE
+#include <my_stacktrace.h>
 
 static uint decode_bits;
 static char **default_argv;
@@ -121,14 +124,14 @@ static void my_exit(int exit_code)
   exit(exit_code);
 }
 
-
-	/* Main program */
+/* Main program */
 
 int main(int argc, char **argv)
 {
   int error;
   MY_INIT(argv[0]);
 
+  my_init_stacktrace(1);
   default_log_dir= opt_log_dir= maria_data_root= (char *)".";
   maria_chk_init(&check_param);
   check_param.opt_lock_memory= 1;		/* Lock memory if possible */