non-win: Add Multiprocess::SetExpectedChildTerminationBuiltinTrap()

Bug: crashpad:30
Change-Id: Ide7ad3d0f8b9938f57d183ff3fc73868ce28c02c
Reviewed-on: https://chromium-review.googlesource.com/932363
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>

test/multiprocess.h

@@ -92,6 +92,12 @@ class Multiprocess {
   //!     expected to kill the child.
   void SetExpectedChildTermination(TerminationReason reason, int code);
 
+#if !defined(OS_WIN)
+  //! \brief Sets termination reason and code appropriately for a child that
+  //!     terminates via `__builtin_trap()`.
+  void SetExpectedChildTerminationBuiltinTrap();
+#endif  // !OS_WIN
+
  protected:
   ~Multiprocess();
 

test/multiprocess_exec_fuchsia.cc

@@ -86,6 +86,10 @@ void Multiprocess::SetExpectedChildTermination(TerminationReason reason,
   code_ = code;
 }
 
+void Multiprocess::SetExpectedChildTerminationBuiltinTrap() {
+  SetExpectedChildTermination(kTerminationNormal, -1);
+}
+
 Multiprocess::~Multiprocess() {
   delete info_;
 }

test/multiprocess_exec_test.cc

@@ -98,6 +98,35 @@ TEST(MultiprocessExec, MultiprocessExecSimpleChildReturnsNonZero) {
   exec.Run();
 };
 
+#if !defined(OS_WIN)
+
+CRASHPAD_CHILD_TEST_MAIN(BuiltinTrapChild) {
+  __builtin_trap();
+  return EXIT_SUCCESS;
+}
+
+class TestBuiltinTrapTermination final : public MultiprocessExec {
+ public:
+  TestBuiltinTrapTermination() {
+    SetChildTestMainFunction("BuiltinTrapChild");
+    SetExpectedChildTerminationBuiltinTrap();
+  }
+
+  ~TestBuiltinTrapTermination() = default;
+
+ private:
+  void MultiprocessParent() override {}
+
+  DISALLOW_COPY_AND_ASSIGN(TestBuiltinTrapTermination);
+};
+
+TEST(MultiprocessExec, BuiltinTrapTermination) {
+  TestBuiltinTrapTermination test;
+  test.Run();
+}
+
+#endif  // !OS_WIN
+
 }  // namespace
 }  // namespace test
 }  // namespace crashpad

test/multiprocess_posix.cc

@@ -157,6 +157,14 @@ void Multiprocess::SetExpectedChildTermination(TerminationReason reason,
   code_ = code;
 }
 
+void Multiprocess::SetExpectedChildTerminationBuiltinTrap() {
+#if defined(ARCH_CPU_ARM64)
+  SetExpectedChildTermination(kTerminationSignal, SIGTRAP);
+#else
+  SetExpectedChildTermination(kTerminationSignal, SIGILL);
+#endif
+}
+
 Multiprocess::~Multiprocess() {
 }