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authoryzct12345 <87620833+yzct12345@users.noreply.github.com>2021-08-13 20:58:35 +0200
committerGitHub <noreply@github.com>2021-08-13 20:58:35 +0200
commit81ed54d13ecea920583c521373d2a6079fc67040 (patch)
tree47c9bbab0c757e24a488497e771cc00993cdc7ed /src
parentlogging: Simplify and make thread-safe (diff)
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Diffstat (limited to '')
-rw-r--r--src/common/CMakeLists.txt3
-rw-r--r--src/common/logging/backend.cpp112
2 files changed, 114 insertions, 1 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 57922b51c..316c4dedc 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -176,3 +176,6 @@ if (MSVC)
else()
target_link_libraries(common PRIVATE zstd)
endif()
+if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux" AND CMAKE_CXX_COMPILER_ID STREQUAL GNU)
+ target_link_libraries(common PRIVATE backtrace)
+endif()
diff --git a/src/common/logging/backend.cpp b/src/common/logging/backend.cpp
index 13edda9c9..4e7cfdc99 100644
--- a/src/common/logging/backend.cpp
+++ b/src/common/logging/backend.cpp
@@ -12,6 +12,14 @@
#include <windows.h> // For OutputDebugStringW
#endif
+#if defined(__linux__) && defined(__GNUG__) && !defined(__clang__)
+#define BOOST_STACKTRACE_USE_BACKTRACE
+#include <boost/stacktrace.hpp>
+#undef BOOST_STACKTRACE_USE_BACKTRACE
+#include <signal.h>
+#define YUZU_LINUX_GCC_BACKTRACE
+#endif
+
#include "common/fs/file.h"
#include "common/fs/fs.h"
#include "common/fs/fs_paths.h"
@@ -154,6 +162,14 @@ public:
bool initialization_in_progress_suppress_logging = false;
+#ifdef YUZU_LINUX_GCC_BACKTRACE
+[[noreturn]] void SleepForever() {
+ while (true) {
+ pause();
+ }
+}
+#endif
+
/**
* Static state as a singleton.
*/
@@ -225,9 +241,66 @@ private:
while (max_logs_to_write-- && message_queue.Pop(entry)) {
write_logs();
}
- })} {}
+ })} {
+#ifdef YUZU_LINUX_GCC_BACKTRACE
+ int waker_pipefd[2];
+ int done_printing_pipefd[2];
+ if (pipe2(waker_pipefd, O_CLOEXEC) || pipe2(done_printing_pipefd, O_CLOEXEC)) {
+ abort();
+ }
+ backtrace_thread_waker_fd = waker_pipefd[1];
+ backtrace_done_printing_fd = done_printing_pipefd[0];
+ std::thread([this, wait_fd = waker_pipefd[0], done_fd = done_printing_pipefd[1]] {
+ Common::SetCurrentThreadName("yuzu:Crash");
+ for (u8 ignore = 0; read(wait_fd, &ignore, 1) != 1;)
+ ;
+ const int sig = received_signal;
+ if (sig <= 0) {
+ abort();
+ }
+ StopBackendThread();
+ const auto signal_entry =
+ CreateEntry(Class::Log, Level::Critical, "?", 0, "?",
+ fmt::vformat("Received signal {}", fmt::make_format_args(sig)));
+ ForEachBackend([&signal_entry](Backend& backend) {
+ backend.EnableForStacktrace();
+ backend.Write(signal_entry);
+ });
+ const auto backtrace =
+ boost::stacktrace::stacktrace::from_dump(backtrace_storage.data(), 4096);
+ for (const auto& frame : backtrace.as_vector()) {
+ auto line = boost::stacktrace::detail::to_string(&frame, 1);
+ if (line.empty()) {
+ abort();
+ }
+ line.pop_back(); // Remove newline
+ const auto frame_entry =
+ CreateEntry(Class::Log, Level::Critical, "?", 0, "?", line);
+ ForEachBackend([&frame_entry](Backend& backend) { backend.Write(frame_entry); });
+ }
+ using namespace std::literals;
+ const auto rip_entry = CreateEntry(Class::Log, Level::Critical, "?", 0, "?", "RIP"s);
+ ForEachBackend([&rip_entry](Backend& backend) {
+ backend.Write(rip_entry);
+ backend.Flush();
+ });
+ for (const u8 anything = 0; write(done_fd, &anything, 1) != 1;)
+ ;
+ // Abort on original thread to help debugging
+ SleepForever();
+ }).detach();
+ signal(SIGSEGV, &HandleSignal);
+ signal(SIGABRT, &HandleSignal);
+#endif
+ }
~Impl() {
+#ifdef YUZU_LINUX_GCC_BACKTRACE
+ if (int zero_or_ignore = 0;
+ !received_signal.compare_exchange_strong(zero_or_ignore, SIGKILL)) {
+ SleepForever();
+ }
+#endif
StopBackendThread();
}
@@ -266,6 +339,36 @@ private:
delete ptr;
}
+#ifdef YUZU_LINUX_GCC_BACKTRACE
+ [[noreturn]] static void HandleSignal(int sig) {
+ signal(SIGABRT, SIG_DFL);
+ signal(SIGSEGV, SIG_DFL);
+ if (sig <= 0) {
+ abort();
+ }
+ instance->InstanceHandleSignal(sig);
+ }
+
+ [[noreturn]] void InstanceHandleSignal(int sig) {
+ if (int zero_or_ignore = 0; !received_signal.compare_exchange_strong(zero_or_ignore, sig)) {
+ if (received_signal == SIGKILL) {
+ abort();
+ }
+ SleepForever();
+ }
+ // Don't restart like boost suggests. We want to append to the log file and not lose dynamic
+ // symbols. This may segfault if it unwinds outside C/C++ code but we'll just have to fall
+ // back to core dumps.
+ boost::stacktrace::safe_dump_to(backtrace_storage.data(), 4096);
+ std::atomic_thread_fence(std::memory_order_seq_cst);
+ for (const int anything = 0; write(backtrace_thread_waker_fd, &anything, 1) != 1;)
+ ;
+ for (u8 ignore = 0; read(backtrace_done_printing_fd, &ignore, 1) != 1;)
+ ;
+ abort();
+ }
+#endif
+
static inline std::unique_ptr<Impl, decltype(&Deleter)> instance{nullptr, Deleter};
Filter filter;
@@ -276,6 +379,13 @@ private:
std::thread backend_thread;
MPSCQueue<Entry> message_queue{};
std::chrono::steady_clock::time_point time_origin{std::chrono::steady_clock::now()};
+
+#ifdef YUZU_LINUX_GCC_BACKTRACE
+ std::atomic_int received_signal{0};
+ std::array<u8, 4096> backtrace_storage{};
+ int backtrace_thread_waker_fd;
+ int backtrace_done_printing_fd;
+#endif
};
} // namespace