Merge "Move libc_logging to libasync_safe." (deb19a63) · Commits · e / os / android_system_core

debuggerd/Android.bp

+4 −7

Original line number	Diff line number	Diff line
		@@ -9,10 +9,6 @@ cc_defaults {
		"-Os",
		],

		// util.cpp gets async signal safe logging via libc_logging,
		// which defines its interface in bionic private headers.
		include_dirs: ["bionic/libc"],

		local_include_dirs: ["include"],
		}

		@@ -26,7 +22,7 @@ cc_library_static {
		],

		whole_static_libs: [
		"libc_logging",
		"libasync_safe",
		"libcutils",
		"libbase",
		],
		@@ -39,7 +35,7 @@ cc_library_static {
		srcs: ["handler/debuggerd_handler.cpp"],

		whole_static_libs: [
		"libc_logging",
		"libasync_safe",
		"libdebuggerd",
		],

		@@ -70,6 +66,7 @@ cc_library_static {
		whole_static_libs: [
		"libdebuggerd_handler_core",
		"libtombstoned_client",
		"libasync_safe",
		"libbase",
		"libdebuggerd",
		"libbacktrace",
		@@ -166,6 +163,7 @@ cc_test {
		"tombstoned_client.cpp",
		"util.cpp"
		],
		static_libs: ["libasync_safe"],
		},
		},

		@@ -178,7 +176,6 @@ cc_test {

		static_libs: [
		"libdebuggerd",
		"libc_logging",
		],

		local_include_dirs: [

debuggerd/handler/debuggerd_fallback.cpp

+9 −8

Original line number	Diff line number	Diff line
		@@ -39,6 +39,7 @@

		#include <android-base/file.h>
		#include <android-base/unique_fd.h>
		#include <async_safe/log.h>

		#include "debuggerd/handler.h"
		#include "debuggerd/tombstoned.h"
		@@ -47,8 +48,6 @@
		#include "backtrace.h"
		#include "tombstone.h"

		#include "private/libc_logging.h"

		using android::base::unique_fd;

		extern "C" void __linker_enable_fallback_allocator();
		@@ -81,7 +80,7 @@ static void iterate_siblings(bool (*callback)(pid_t, int), int output_fd) {
		DIR* dir = opendir(buf);

		if (!dir) {
		__libc_format_log(ANDROID_LOG_ERROR, "libc", "failed to open %s: %s", buf, strerror(errno));
		async_safe_format_log(ANDROID_LOG_ERROR, "libc", "failed to open %s: %s", buf, strerror(errno));
		return;
		}

		@@ -145,7 +144,8 @@ static void trace_handler(siginfo_t* info, ucontext_t* ucontext) {
		static pthread_mutex_t trace_mutex = PTHREAD_MUTEX_INITIALIZER;
		int ret = pthread_mutex_trylock(&trace_mutex);
		if (ret != 0) {
		__libc_format_log(ANDROID_LOG_INFO, "libc", "pthread_mutex_try_lock failed: %s", strerror(ret));
		async_safe_format_log(ANDROID_LOG_INFO, "libc", "pthread_mutex_try_lock failed: %s",
		strerror(ret));
		return;
		}

		@@ -167,7 +167,8 @@ static void trace_handler(siginfo_t* info, ucontext_t* ucontext) {
		// receiving our signal.
		unique_fd pipe_read, pipe_write;
		if (!Pipe(&pipe_read, &pipe_write)) {
		__libc_format_log(ANDROID_LOG_ERROR, "libc", "failed to create pipe: %s", strerror(errno));
		async_safe_format_log(ANDROID_LOG_ERROR, "libc", "failed to create pipe: %s",
		strerror(errno));
		return false;
		}

		@@ -180,8 +181,8 @@ static void trace_handler(siginfo_t* info, ucontext_t* ucontext) {
		siginfo.si_uid = getuid();

		if (syscall(__NR_rt_tgsigqueueinfo, getpid(), tid, DEBUGGER_SIGNAL, &siginfo) != 0) {
		__libc_format_log(ANDROID_LOG_ERROR, "libc", "failed to send trace signal to %d: %s", tid,
		strerror(errno));
		async_safe_format_log(ANDROID_LOG_ERROR, "libc", "failed to send trace signal to %d: %s",
		tid, strerror(errno));
		return false;
		}

		@@ -209,7 +210,7 @@ static void crash_handler(siginfo_t* info, ucontext_t* ucontext, void* abort_mes
		static pthread_mutex_t crash_mutex = PTHREAD_MUTEX_INITIALIZER;
		int ret = pthread_mutex_lock(&crash_mutex);
		if (ret != 0) {
		__libc_format_log(ANDROID_LOG_INFO, "libc", "pthread_mutex_lock failed: %s", strerror(ret));
		async_safe_format_log(ANDROID_LOG_INFO, "libc", "pthread_mutex_lock failed: %s", strerror(ret));
		return;
		}

debuggerd/handler/debuggerd_handler.cpp

+37 −31

Original line number	Diff line number	Diff line
		@@ -48,8 +48,7 @@
		#include <sys/wait.h>
		#include <unistd.h>

		#include "private/bionic_futex.h"
		#include "private/libc_logging.h"
		#include <async_safe/log.h>

		// see man(2) prctl, specifically the section about PR_GET_NAME
		#define MAX_TASK_NAME_LEN (16)
		@@ -62,6 +61,10 @@

		#define CRASH_DUMP_PATH "/system/bin/" CRASH_DUMP_NAME

		static inline void futex_wait(volatile void* ftx, int value) {
		syscall(__NR_futex, ftx, FUTEX_WAIT, value, nullptr, nullptr, 0);
		}

		class ErrnoRestorer {
		public:
		ErrnoRestorer() : saved_errno_(errno) {
		@@ -82,11 +85,12 @@ static debuggerd_callbacks_t g_callbacks;
		// Mutex to ensure only one crashing thread dumps itself.
		static pthread_mutex_t crash_mutex = PTHREAD_MUTEX_INITIALIZER;

		// Don't use __libc_fatal because it exits via abort, which might put us back into a signal handler.
		// Don't use async_safe_fatal because it exits via abort, which might put us back into
		// a signal handler.
		static void __noreturn __printflike(1, 2) fatal(const char* fmt, ...) {
		va_list args;
		va_start(args, fmt);
		__libc_format_log_va_list(ANDROID_LOG_FATAL, "libc", fmt, args);
		async_safe_format_log_va_list(ANDROID_LOG_FATAL, "libc", fmt, args);
		_exit(1);
		}

		@@ -96,7 +100,7 @@ static void __noreturn __printflike(1, 2) fatal_errno(const char* fmt, ...) {
		va_start(args, fmt);

		char buf[4096];
		__libc_format_buffer_va_list(buf, sizeof(buf), fmt, args);
		async_safe_format_buffer_va_list(buf, sizeof(buf), fmt, args);
		fatal("%s: %s", buf, strerror(err));
		}

		@@ -120,7 +124,7 @@ static void log_signal_summary(int signum, const siginfo_t* info) {
		}

		if (signum == DEBUGGER_SIGNAL) {
		__libc_format_log(ANDROID_LOG_INFO, "libc", "Requested dump for tid %d (%s)", gettid(),
		async_safe_format_log(ANDROID_LOG_INFO, "libc", "Requested dump for tid %d (%s)", gettid(),
		thread_name);
		return;
		}
		@@ -166,14 +170,14 @@ static void log_signal_summary(int signum, const siginfo_t* info) {
		char addr_desc[32]; // ", fault addr 0x1234"
		addr_desc[0] = code_desc[0] = 0;
		if (info != nullptr) {
		__libc_format_buffer(code_desc, sizeof(code_desc), ", code %d", info->si_code);
		async_safe_format_buffer(code_desc, sizeof(code_desc), ", code %d", info->si_code);
		if (has_address) {
		__libc_format_buffer(addr_desc, sizeof(addr_desc), ", fault addr %p", info->si_addr);
		async_safe_format_buffer(addr_desc, sizeof(addr_desc), ", fault addr %p", info->si_addr);
		}
		}

		__libc_format_log(ANDROID_LOG_FATAL, "libc", "Fatal signal %d (%s)%s%s in tid %d (%s)", signum,
		signal_name, code_desc, addr_desc, gettid(), thread_name);
		async_safe_format_log(ANDROID_LOG_FATAL, "libc", "Fatal signal %d (%s)%s%s in tid %d (%s)",
		signum, signal_name, code_desc, addr_desc, gettid(), thread_name);
		}

		/*
		@@ -182,7 +186,7 @@ static void log_signal_summary(int signum, const siginfo_t* info) {
		static bool have_siginfo(int signum) {
		struct sigaction old_action;
		if (sigaction(signum, nullptr, &old_action) < 0) {
		__libc_format_log(ANDROID_LOG_WARN, "libc", "Failed testing for SA_SIGINFO: %s",
		async_safe_format_log(ANDROID_LOG_WARN, "libc", "Failed testing for SA_SIGINFO: %s",
		strerror(errno));
		return false;
		}
		@@ -207,7 +211,7 @@ static void raise_caps() {
		capdata[1].inheritable = capdata[1].permitted;

		if (capset(&capheader, &capdata[0]) == -1) {
		__libc_format_log(ANDROID_LOG_ERROR, "libc", "capset failed: %s", strerror(errno));
		async_safe_format_log(ANDROID_LOG_ERROR, "libc", "capset failed: %s", strerror(errno));
		}
		}

		@@ -217,8 +221,8 @@ static void raise_caps() {
		for (unsigned long i = 0; i < 64; ++i) {
		if (capmask & (1ULL << i)) {
		if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_RAISE, i, 0, 0) != 0) {
		__libc_format_log(ANDROID_LOG_ERROR, "libc", "failed to raise ambient capability %lu: %s",
		i, strerror(errno));
		async_safe_format_log(ANDROID_LOG_ERROR, "libc",
		"failed to raise ambient capability %lu: %s", i, strerror(errno));
		}
		}
		}
		@@ -260,8 +264,8 @@ static int debuggerd_dispatch_pseudothread(void* arg) {
		// Don't use fork(2) to avoid calling pthread_atfork handlers.
		int forkpid = clone(nullptr, nullptr, 0, nullptr);
		if (forkpid == -1) {
		__libc_format_log(ANDROID_LOG_FATAL, "libc", "failed to fork in debuggerd signal handler: %s",
		strerror(errno));
		async_safe_format_log(ANDROID_LOG_FATAL, "libc",
		"failed to fork in debuggerd signal handler: %s", strerror(errno));
		} else if (forkpid == 0) {
		TEMP_FAILURE_RETRY(dup2(pipefds[1], STDOUT_FILENO));
		close(pipefds[0]);
		@@ -271,8 +275,9 @@ static int debuggerd_dispatch_pseudothread(void* arg) {

		char main_tid[10];
		char pseudothread_tid[10];
		__libc_format_buffer(main_tid, sizeof(main_tid), "%d", thread_info->crashing_tid);
		__libc_format_buffer(pseudothread_tid, sizeof(pseudothread_tid), "%d", thread_info->pseudothread_tid);
		async_safe_format_buffer(main_tid, sizeof(main_tid), "%d", thread_info->crashing_tid);
		async_safe_format_buffer(pseudothread_tid, sizeof(pseudothread_tid), "%d",
		thread_info->pseudothread_tid);

		execl(CRASH_DUMP_PATH, CRASH_DUMP_NAME, main_tid, pseudothread_tid, nullptr);

		@@ -282,15 +287,16 @@ static int debuggerd_dispatch_pseudothread(void* arg) {
		char buf[4];
		ssize_t rc = TEMP_FAILURE_RETRY(read(pipefds[0], &buf, sizeof(buf)));
		if (rc == -1) {
		__libc_format_log(ANDROID_LOG_FATAL, "libc", "read of IPC pipe failed: %s", strerror(errno));
		async_safe_format_log(ANDROID_LOG_FATAL, "libc", "read of IPC pipe failed: %s",
		strerror(errno));
		} else if (rc == 0) {
		__libc_format_log(ANDROID_LOG_FATAL, "libc", "crash_dump helper failed to exec");
		async_safe_format_log(ANDROID_LOG_FATAL, "libc", "crash_dump helper failed to exec");
		} else if (rc != 1) {
		__libc_format_log(ANDROID_LOG_FATAL, "libc",
		async_safe_format_log(ANDROID_LOG_FATAL, "libc",
		"read of IPC pipe returned unexpected value: %zd", rc);
		} else {
		if (buf[0] != '\1') {
		__libc_format_log(ANDROID_LOG_FATAL, "libc", "crash_dump helper reported failure");
		async_safe_format_log(ANDROID_LOG_FATAL, "libc", "crash_dump helper reported failure");
		} else {
		thread_info->crash_dump_started = true;
		}
		@@ -300,10 +306,10 @@ static int debuggerd_dispatch_pseudothread(void* arg) {
		// Don't leave a zombie child.
		int status;
		if (TEMP_FAILURE_RETRY(waitpid(forkpid, &status, 0)) == -1) {
		__libc_format_log(ANDROID_LOG_FATAL, "libc", "failed to wait for crash_dump helper: %s",
		async_safe_format_log(ANDROID_LOG_FATAL, "libc", "failed to wait for crash_dump helper: %s",
		strerror(errno));
		} else if (WIFSTOPPED(status) \|\| WIFSIGNALED(status)) {
		__libc_format_log(ANDROID_LOG_FATAL, "libc", "crash_dump helper crashed or stopped");
		async_safe_format_log(ANDROID_LOG_FATAL, "libc", "crash_dump helper crashed or stopped");
		thread_info->crash_dump_started = false;
		}
		}
		@@ -383,7 +389,7 @@ static void debuggerd_signal_handler(int signal_number, siginfo_t* info, void* c
		// Only allow one thread to handle a signal at a time.
		int ret = pthread_mutex_lock(&crash_mutex);
		if (ret != 0) {
		__libc_format_log(ANDROID_LOG_INFO, "libc", "pthread_mutex_lock failed: %s", strerror(ret));
		async_safe_format_log(ANDROID_LOG_INFO, "libc", "pthread_mutex_lock failed: %s", strerror(ret));
		return;
		}

		@@ -419,10 +425,10 @@ static void debuggerd_signal_handler(int signal_number, siginfo_t* info, void* c
		}

		// Wait for the child to start...
		__futex_wait(&thread_info.pseudothread_tid, -1, nullptr);
		futex_wait(&thread_info.pseudothread_tid, -1);

		// and then wait for it to finish.
		__futex_wait(&thread_info.pseudothread_tid, child_pid, nullptr);
		futex_wait(&thread_info.pseudothread_tid, child_pid);

		// Restore PR_SET_DUMPABLE to its original value.
		if (prctl(PR_SET_DUMPABLE, orig_dumpable) != 0) {

debuggerd/tombstoned_client.cpp

+13 −13

Original line number	Diff line number	Diff line
		@@ -22,11 +22,11 @@
		#include <utility>

		#include <android-base/unique_fd.h>
		#include <async_safe/log.h>
		#include <cutils/sockets.h>

		#include "debuggerd/protocol.h"
		#include "debuggerd/util.h"
		#include "private/libc_logging.h"

		using android::base::unique_fd;

		@@ -34,7 +34,7 @@ bool tombstoned_connect(pid_t pid, unique_fd* tombstoned_socket, unique_fd* outp
		unique_fd sockfd(socket_local_client(kTombstonedCrashSocketName,
		ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_SEQPACKET));
		if (sockfd == -1) {
		__libc_format_log(ANDROID_LOG_ERROR, "libc", "failed to connect to tombstoned: %s",
		async_safe_format_log(ANDROID_LOG_ERROR, "libc", "failed to connect to tombstoned: %s",
		strerror(errno));
		return false;
		}
		@@ -43,7 +43,7 @@ bool tombstoned_connect(pid_t pid, unique_fd* tombstoned_socket, unique_fd* outp
		packet.packet_type = CrashPacketType::kDumpRequest;
		packet.packet.dump_request.pid = pid;
		if (TEMP_FAILURE_RETRY(write(sockfd, &packet, sizeof(packet))) != sizeof(packet)) {
		__libc_format_log(ANDROID_LOG_ERROR, "libc", "failed to write DumpRequest packet: %s",
		async_safe_format_log(ANDROID_LOG_ERROR, "libc", "failed to write DumpRequest packet: %s",
		strerror(errno));
		return false;
		}
		@@ -51,11 +51,11 @@ bool tombstoned_connect(pid_t pid, unique_fd* tombstoned_socket, unique_fd* outp
		unique_fd tmp_output_fd;
		ssize_t rc = recv_fd(sockfd, &packet, sizeof(packet), &tmp_output_fd);
		if (rc == -1) {
		__libc_format_log(ANDROID_LOG_ERROR, "libc",
		async_safe_format_log(ANDROID_LOG_ERROR, "libc",
		"failed to read response to DumpRequest packet: %s", strerror(errno));
		return false;
		} else if (rc != sizeof(packet)) {
		__libc_format_log(
		async_safe_format_log(
		ANDROID_LOG_ERROR, "libc",
		"received DumpRequest response packet of incorrect length (expected %zu, got %zd)",
		sizeof(packet), rc);
		@@ -67,7 +67,7 @@ bool tombstoned_connect(pid_t pid, unique_fd* tombstoned_socket, unique_fd* outp
		// a regular fd, and writing to an fd with O_APPEND).
		int flags = fcntl(tmp_output_fd.get(), F_GETFL);
		if (fcntl(tmp_output_fd.get(), F_SETFL, flags \| O_APPEND) != 0) {
		__libc_format_log(ANDROID_LOG_WARN, "libc", "failed to set output fd flags: %s",
		async_safe_format_log(ANDROID_LOG_WARN, "libc", "failed to set output fd flags: %s",
		strerror(errno));
		}

debuggerd/util.cpp

+0 −2

Original line number	Diff line number	Diff line
		@@ -24,8 +24,6 @@
		#include <cutils/sockets.h>
		#include <debuggerd/protocol.h>

		#include "private/libc_logging.h"

		using android::base::unique_fd;

		ssize_t send_fd(int sockfd, const void* data, size_t len, unique_fd fd) {