Merge "Fix crash in libunwindstack." (95f94078) · Commits · e / os / android_system_core

libunwindstack/Unwinder.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -247,7 +247,7 @@ void Unwinder::Unwind(const std::vector<std::string>* initial_map_names_to_skip,
		// or the pc in the first frame is in a valid map.
		// This allows for a case where the code jumps into the middle of
		// nowhere, but there is no other unwind information after that.
		if (frames_.size() != 2 \|\| maps_->Find(frames_[0].pc) != nullptr) {
		if (frames_.size() > 2 \|\| (frames_.size() > 0 && maps_->Find(frames_[0].pc) != nullptr)) {
		// Remove the speculative frame.
		frames_.pop_back();
		}

+17 −0

Original line number	Diff line number	Diff line
		@@ -749,6 +749,23 @@ TEST_F(UnwinderTest, speculative_frame_not_removed_pc_bad) {
		EXPECT_EQ(PROT_READ \| PROT_WRITE, frame->map_flags);
		}

		// Verify that a speculative frame does not cause a crash when it wasn't
		// really added due to a filter.
		TEST_F(UnwinderTest, speculative_frame_check_with_no_frames) {
		regs_.set_pc(0x23000);
		regs_.set_sp(0x10000);
		regs_.FakeSetReturnAddress(0x23100);
		regs_.FakeSetReturnAddressValid(true);

		Unwinder unwinder(64, maps_.get(), &regs_, process_memory_);

		std::vector<std::string> skip_names{"libanother.so"};
		unwinder.Unwind(&skip_names);
		EXPECT_EQ(ERROR_NONE, unwinder.LastErrorCode());

		ASSERT_EQ(0U, unwinder.NumFrames());
		}

		// Verify that an unwind stops when a frame is in given suffix.
		TEST_F(UnwinderTest, map_ignore_suffixes) {
		ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));