[UBSan] Add __sanitizer_print_stack_trace() for UBSansubmit/tizen_base/20171123.084139

libsanitizer/
	* ubsan/ubsan_diag.cc (__sanitizer_print_stack_trace): New function.
	* ubsan/ubsan_diag.cc (PrintStackTrace): New function.

Change-Id: I270b3765a571381fcf400b8e54f66dfa291e4862

1 files changed, 19 insertions, 5 deletions

diff --git a/libsanitizer/ubsan/ubsan_diag.cc b/libsanitizer/ubsan/ubsan_diag.cc
index dac0937e819..9adfb6b21fc 100644
--- a/libsanitizer/ubsan/ubsan_diag.cc
+++ b/libsanitizer/ubsan/ubsan_diag.cc
@@ -25,11 +25,7 @@
 
 using namespace __ubsan;
 
-static void MaybePrintStackTrace(uptr pc, uptr bp) {
-  // We assume that flags are already parsed, as UBSan runtime
-  // will definitely be called when we print the first diagnostics message.
-  if (!flags()->print_stacktrace)
-    return;
+static void PrintStackTrace(uptr pc, uptr bp) {
   // We can only use slow unwind, as we don't have any information about stack
   // top/bottom.
   // FIXME: It's better to respect "fast_unwind_on_fatal" runtime flag and
@@ -42,6 +38,15 @@ static void MaybePrintStackTrace(uptr pc, uptr bp) {
   stack.Print();
 }
 
+static void MaybePrintStackTrace(uptr pc, uptr bp) {
+  // We assume that flags are already parsed, as UBSan runtime
+  // will definitely be called when we print the first diagnostics message.
+  if (!flags()->print_stacktrace)
+    return;
+
+  PrintStackTrace(pc, bp);
+}
+
 static const char *ConvertTypeToString(ErrorType Type) {
   switch (Type) {
 #define UBSAN_CHECK(Name, SummaryKind, FSanitizeFlagName)                      \
@@ -476,4 +481,13 @@ bool __ubsan::IsISanFunctionCheckSuppressed(ReportOptions *Opts) {
   return false;
 }
 
+extern "C" SANITIZER_INTERFACE_ATTRIBUTE
+void __sanitizer_print_stack_trace() {
+  using namespace __ubsan;
+
+  GET_REPORT_OPTIONS(false);
+
+  PrintStackTrace(Opts.pc, Opts.bp);
+}
+
 #endif  // CAN_SANITIZE_UB