[tsan] Don't delay SIGTRAP handler

Reviewers: eugenis, jfb

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D68604

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@373978 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 29 insertions, 0 deletions

diff --git a/test/sanitizer_common/TestCases/Linux/signal_trap_handler.cpp b/test/sanitizer_common/TestCases/Linux/signal_trap_handler.cpp
new file mode 100644
index 000000000..9b4bc067e
--- /dev/null
+++ b/test/sanitizer_common/TestCases/Linux/signal_trap_handler.cpp
@@ -0,0 +1,29 @@
+// RUN: %clangxx -O1 %s -o %t && %env_tool_opts=handle_sigtrap=1 %run %t 2>&1 | FileCheck %s
+
+#include <assert.h>
+#include <signal.h>
+#include <stdio.h>
+
+int handled;
+
+void handler(int signo, siginfo_t *info, void *uctx) {
+  handled = 1;
+}
+
+int main() {
+  struct sigaction a = {}, old = {};
+  a.sa_sigaction = handler;
+  a.sa_flags = SA_SIGINFO;
+  sigaction(SIGTRAP, &a, &old);
+
+  a = {};
+  sigaction(SIGTRAP, 0, &a);
+  assert(a.sa_sigaction == handler);
+  assert(a.sa_flags & SA_SIGINFO);
+
+  __builtin_debugtrap();
+  assert(handled);
+  fprintf(stderr, "HANDLED %d\n", handled);
+}
+
+// CHECK: HANDLED 1