[llvm-commits] [llvm] r164426 - in /llvm/trunk: autoconf/configure.ac configure include/llvm/Config/config.h.in lib/Support/Unix/Signals.inc
Eric Christopher
echristo at apple.com
Fri Sep 21 16:03:29 PDT 2012
Author: echristo
Date: Fri Sep 21 18:03:29 2012
New Revision: 164426
URL: http://llvm.org/viewvc/llvm-project?rev=164426&view=rev
Log:
Add an --enable-backtraces option to configure to determine
whether or not we want to print out backtrace information. Useful
for libraries that don't need backtrace information on a crash.
rdar://11844710
Modified:
llvm/trunk/autoconf/configure.ac
llvm/trunk/configure
llvm/trunk/include/llvm/Config/config.h.in
llvm/trunk/lib/Support/Unix/Signals.inc
Modified: llvm/trunk/autoconf/configure.ac
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/autoconf/configure.ac?rev=164426&r1=164425&r2=164426&view=diff
==============================================================================
--- llvm/trunk/autoconf/configure.ac (original)
+++ llvm/trunk/autoconf/configure.ac Fri Sep 21 18:03:29 2012
@@ -678,6 +678,21 @@
AC_DEFINE_UNQUOTED([ENABLE_TIMESTAMPS],$ENABLE_TIMESTAMPS,
[Define if timestamp information (e.g., __DATE__) is allowed])
+dnl Enable embedding timestamp information into build.
+
+AC_ARG_ENABLE(backtraces,
+ AS_HELP_STRING([--enable-backtraces],
+ [Enable embedding backtraces on crash (default is YES)]),,
+ enableval=default)
+case "$enableval" in
+ yes) AC_SUBST(ENABLE_TIMESTAMPS,[1]) ;;
+ no) AC_SUBST(ENABLE_TIMESTAMPS,[0]) ;;
+ default) AC_SUBST(ENABLE_TIMESTAMPS,[1]) ;;
+ *) AC_MSG_ERROR([Invalid setting for --enable-backtraces. Use "yes" or "no"]) ;;
+esac
+AC_DEFINE_UNQUOTED([ENABLE_BACKTRACES],$ENABLE_BACKTRACES,
+ [Define if you want backtraces on crash])
+
dnl Allow specific targets to be specified for building (or not)
TARGETS_TO_BUILD=""
AC_ARG_ENABLE([targets],AS_HELP_STRING([--enable-targets],
Modified: llvm/trunk/configure
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/configure?rev=164426&r1=164425&r2=164426&view=diff
==============================================================================
--- llvm/trunk/configure (original)
+++ llvm/trunk/configure Fri Sep 21 18:03:29 2012
@@ -1423,6 +1423,8 @@
Win32 DLL (default is NO)
--enable-timestamps Enable embedding timestamp information in build
(default is YES)
+ --enable-backtraces Enable embedding backtraces on crash (default is
+ YES)
--enable-targets Build specific host targets: all or
target1,target2,... Valid targets are: host, x86,
x86_64, sparc, powerpc, arm, mips, spu, hexagon,
@@ -5382,6 +5384,31 @@
_ACEOF
+
+# Check whether --enable-backtraces was given.
+if test "${enable_backtraces+set}" = set; then
+ enableval=$enable_backtraces;
+else
+ enableval=default
+fi
+
+case "$enableval" in
+ yes) ENABLE_TIMESTAMPS=1
+ ;;
+ no) ENABLE_TIMESTAMPS=0
+ ;;
+ default) ENABLE_TIMESTAMPS=1
+ ;;
+ *) { { echo "$as_me:$LINENO: error: Invalid setting for --enable-backtraces. Use \"yes\" or \"no\"" >&5
+echo "$as_me: error: Invalid setting for --enable-backtraces. Use \"yes\" or \"no\"" >&2;}
+ { (exit 1); exit 1; }; } ;;
+esac
+
+cat >>confdefs.h <<_ACEOF
+#define ENABLE_BACKTRACES $ENABLE_BACKTRACES
+_ACEOF
+
+
TARGETS_TO_BUILD=""
# Check whether --enable-targets was given.
if test "${enable_targets+set}" = set; then
@@ -10289,7 +10316,7 @@
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<EOF
-#line 10292 "configure"
+#line 10319 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
Modified: llvm/trunk/include/llvm/Config/config.h.in
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Config/config.h.in?rev=164426&r1=164425&r2=164426&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Config/config.h.in (original)
+++ llvm/trunk/include/llvm/Config/config.h.in Fri Sep 21 18:03:29 2012
@@ -18,6 +18,9 @@
/* Default <path> to all compiler invocations for --sysroot=<path>. */
#undef DEFAULT_SYSROOT
+/* Define if you want backtraces on crash */
+#undef ENABLE_BACKTRACES
+
/* Define if position independent code is enabled */
#undef ENABLE_PIC
Modified: llvm/trunk/lib/Support/Unix/Signals.inc
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/Unix/Signals.inc?rev=164426&r1=164425&r2=164426&view=diff
==============================================================================
--- llvm/trunk/lib/Support/Unix/Signals.inc (original)
+++ llvm/trunk/lib/Support/Unix/Signals.inc Fri Sep 21 18:03:29 2012
@@ -243,7 +243,7 @@
// On glibc systems we have the 'backtrace' function, which works nicely, but
// doesn't demangle symbols.
static void PrintStackTrace(void *) {
-#ifdef HAVE_BACKTRACE
+#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACE)
static void* StackTrace[256];
// Use backtrace() to output a backtrace on Linux systems with glibc.
int depth = backtrace(StackTrace,
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