Merge "Improve SIGILL support." (cf252ab0) · Commits · e / os / android_system_core

debuggerd/crasher/crasher.cpp

+11 −0

Original line number	Diff line number	Diff line
		@@ -197,6 +197,7 @@ static int usage() {
		fprintf(stderr, " LOG-FATAL call libbase LOG(FATAL)\n");
		fprintf(stderr, "\n");
		fprintf(stderr, " SIGFPE cause a SIGFPE\n");
		fprintf(stderr, " SIGILL cause a SIGILL\n");
		fprintf(stderr, " SIGSEGV cause a SIGSEGV at address 0x0 (synonym: crash)\n");
		fprintf(stderr, " SIGSEGV-non-null cause a SIGSEGV at a non-zero address\n");
		fprintf(stderr, " SIGSEGV-unmapped mmap/munmap a region of memory and then attempt to access it\n");
		@@ -268,6 +269,16 @@ noinline int do_action(const char* arg) {
		} else if (!strcasecmp(arg, "SIGFPE")) {
		raise(SIGFPE);
		return EXIT_SUCCESS;
		} else if (!strcasecmp(arg, "SIGILL")) {
		#if defined(__aarch64__)
		__asm__ volatile(".word 0\n");
		#elif defined(__arm__)
		__asm__ volatile(".word 0xe7f0def0\n");
		#elif defined(__i386__) \|\| defined(__x86_64__)
		__asm__ volatile("ud2\n");
		#else
		#error
		#endif
		} else if (!strcasecmp(arg, "SIGTRAP")) {
		raise(SIGTRAP);
		return EXIT_SUCCESS;

+11 −4

Original line number	Diff line number	Diff line
		@@ -102,10 +102,17 @@ static void dump_probable_cause(log_t* log, const siginfo_t* si) {
		if (!cause.empty()) _LOG(log, logtype::HEADER, "Cause: %s\n", cause.c_str());
		}

		static void dump_signal_info(log_t* log, const ThreadInfo& thread_info) {
		char addr_desc[32]; // ", fault addr 0x1234"
		static void dump_signal_info(log_t* log, const ThreadInfo& thread_info, Memory* process_memory) {
		char addr_desc[64]; // ", fault addr 0x1234"
		if (signal_has_si_addr(thread_info.siginfo)) {
		snprintf(addr_desc, sizeof(addr_desc), "%p", thread_info.siginfo->si_addr);
		void* addr = thread_info.siginfo->si_addr;
		if (thread_info.siginfo->si_signo == SIGILL) {
		uint32_t instruction = {};
		process_memory->Read(reinterpret_cast<uint64_t>(addr), &instruction, sizeof(instruction));
		snprintf(addr_desc, sizeof(addr_desc), "%p (*pc=%#08x)", addr, instruction);
		} else {
		snprintf(addr_desc, sizeof(addr_desc), "%p", addr);
		}
		} else {
		snprintf(addr_desc, sizeof(addr_desc), "--------");
		}
		@@ -418,7 +425,7 @@ static bool dump_thread(log_t* log, BacktraceMap* map, Memory* process_memory,
		dump_thread_info(log, thread_info);

		if (thread_info.siginfo) {
		dump_signal_info(log, thread_info);
		dump_signal_info(log, thread_info, process_memory);
		}

		if (primary_thread) {