[sanitizer] Intercept backtrace, backtrace_symbols.

llvm-svn: 191516

1 files changed, 26 insertions, 0 deletions

diff --git a/compiler-rt/lib/msan/lit_tests/backtrace.cc b/compiler-rt/lib/msan/lit_tests/backtrace.cc
new file mode 100644
index 00000000000..48684c29c60
--- /dev/null
+++ b/compiler-rt/lib/msan/lit_tests/backtrace.cc
@@ -0,0 +1,26 @@
+// RUN: %clangxx_msan -m64 -O0 %s -o %t && %t
+
+#include <assert.h>
+#include <execinfo.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+__attribute__((noinline))
+void f() {
+  void *buf[10];
+  int sz = backtrace(buf, sizeof(buf) / sizeof(*buf));
+  assert(sz > 0);
+  for (int i = 0; i < sz; ++i)
+    if (!buf[i])
+      exit(1);
+  char **s = backtrace_symbols(buf, sz);
+  assert(s > 0);
+  for (int i = 0; i < sz; ++i)
+    printf("%d\n", strlen(s[i]));
+}
+
+int main(void) {
+  f();
+  return 0;
+}