From patchwork Thu Nov 29 17:42:20 2012
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Subject: Put a breakpoint on __asan_report_error for ASAN
Date: Thu, 29 Nov 2012 07:42:20 -0000
From: "H.J. Lu" <hongjiu.lu@intel.com>
X-Patchwork-Id: 202798
Message-Id: <20121129174220.GB31369@intel.com>
To: gcc-patches@gcc.gnu.org

Hi,

This patch puts a breakpoint on __asan_report_error if CFLAGS contains
-fsanitize=address, similar to fancy_abort and internal_error.  OK to
install?


H.J.

---
2012-11-24  H.J. Lu  <hongjiu.lu@intel.com>

	* configure.ac: Append gdbasan.in to .gdbinit if CFLAGS contains
	-fsanitize=address.
	* configure: Regenerated.

	* gdbasan.in: New file.

diff --git a/gcc/configure b/gcc/configure
index e2c119e..004910f 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -27032,6 +27032,14 @@ if test "x$subdirs" != x; then
 fi
 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
 
+# Put a breakpoint on __asan_report_error to help with debugging buffer
+# overflow.
+case "$CFLAGS" in
+*-fsanitize=address*)
+  echo "source ${srcdir}/gdbasan.in" >> .gdbinit
+  ;;
+esac
+
 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
 
 
diff --git a/gcc/configure.ac b/gcc/configure.ac
index c6f57bd..b9aaadb 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -5017,6 +5017,14 @@ if test "x$subdirs" != x; then
 fi
 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
 
+# Put a breakpoint on __asan_report_error to help with debugging buffer
+# overflow.
+case "$CFLAGS" in
+*-fsanitize=address*)
+  echo "source ${srcdir}/gdbasan.in" >> .gdbinit
+  ;;
+esac
+
 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
 AC_SUBST(gcc_tooldir)
 AC_SUBST(dollar)
diff --git a/gcc/gdbasan.in b/gcc/gdbasan.in
new file mode 100644
index 0000000..cf05825
--- /dev/null
+++ b/gcc/gdbasan.in
@@ -0,0 +1,3 @@
+# Put a breakpoint on __asan_report_error to help with debugging buffer
+# overflow.
+b __asan_report_error