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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
#include "mozilla/Attributes.h"
#include "mozilla/TsanOptions.h"
#ifndef _MSC_VER // Not supported by clang-cl yet
//
// When running with ThreadSanitizer, we sometimes need to suppress existing
// races. However, in any case, it should be either because
//
// 1) a bug is on file. In this case, the bug number should always be
// included with the suppression.
//
// or 2) this is an intentional race. Please be very careful with judging
// races as intentional and benign. Races in C++ are undefined behavior
// and compilers increasingly rely on exploiting this for optimizations.
// Hence, many seemingly benign races cause harmful or unexpected
// side-effects.
//
// See also:
//
//
// Also, when adding any race suppressions here, make sure to always add
// a signature for each of the two race stacks. Sometimes, TSan fails to
// symbolize one of the two traces and this can cause suppressed races to
// show up intermittently.
//
// clang-format off
extern "C" const char* __tsan_default_suppressions() {
return "# Add your suppressions below\n"
// External uninstrumented libraries
MOZ_TSAN_DEFAULT_EXTLIB_SUPPRESSIONS
// TSan internals
"race:__tsan::ProcessPendingSignals\n"
"race:__tsan::CallUserSignalHandler\n"
// Uninstrumented code causing false positives
// These libraries are uninstrumented and cause mutex false positives.
// However, they can be unloaded by GTK early which we cannot avoid.
"mutex:libGL.so\n"
"mutex:libGLdispatch\n"
"mutex:libGLX\n"
"mutex:libEGL_mesa.so\n"
// ~GLContextGLX unlocks a libGL mutex.
"mutex:GLContextGLX::~GLContextGLX\n"
"mutex:libffi.so\n"
"mutex:wl_registry_destroy\n"
"mutex:libdbus-1\n"
"mutex:swrast_dri.so\n"
"race:libavcodec.so*\n"
"race:libavutil.so*\n"
// For some reason, the suppressions on libpulse.so
// through `called_from_lib` only work partially.
"race:libpulse.so\n"
"race:pa_context_suspend_source_by_index\n"
"race:pa_context_unref\n"
"race:pa_format_info_set_prop_string_array\n"
"race:pa_stream_get_index\n"
"race:pa_stream_update_timing_info\n"
"race:vorbis_synthesis_init\n"
// This is a callback from libglib-2 that is apparently
// not fully suppressed through `called_from_lib`.
"race:g_main_context_dispatch\n"
// This is likely a false positive involving a mutex from GTK.
"mutex:GetMaiAtkType\n"
// calling into uninstrumented external graphics driver code.
// For example: iris_dri.so and swrast_dri.so.
"race:fire_glxtest_process\n"
"race:iris_dri\n"
"race:libLLVM-12\n"
"race:radeonsi_dri\n"
"race:swrast_dri.so\n"
"race:libffi.so\n"
"race:mozilla::widget::WaylandBuffer::BufferReleaseCallbackHandler\n"
// Deadlock reports on single-threaded runtime.
//
// This is a known false positive from TSan where it reports
// a potential deadlock even though all mutexes are only
// taken by a single thread. For applications/tasks where we
// are absolutely sure that no second thread will be involved
// we should suppress these issues.
//
"deadlock:SanctionsTestServer\n"
"deadlock:OCSPStaplingServer\n"
"deadlock:BadCertAndPinningServer\n"
"deadlock:cert_storage::SecurityState::open_db\n"
"deadlock:cert_storage::SecurityState::add_certs\n"
"deadlock:mozilla::camera::LockAndDispatch\n"
"deadlock:third_party/rust/rkv/src/env.rs\n"
"deadlock:EncryptedClientHelloServer\n"
"deadlock:nsDOMWindowUtils::CompareCanvases\n"
// Benign races in third-party code (should be fixed upstream)
// No Bug - permanent
// No Upstream Bug Filed!
//
// SIMD Initialization in libjpeg, potentially runs
// initialization twice, but otherwise benign. Init
// routine itself is in native assembler.
"race:init_simd\n"
"race:simd_support\n"
"race:jsimd_can_ycc_rgb\n"
// No Upstream Bug Filed!
//
// Likely benign race in ipc/chromium/ where we set
// `message_loop_` to `NULL` on two threads when stopping
// a thread at the same time it is already finishing.
"race:base::Thread::Stop\n"
// No Upstream Bug Filed!
//
// NSS is using freebl from two different threads but freebl isn't
// that threadsafe.
"race:mp_exptmod.max_window_bits\n"
// No Upstream Bug Filed!
//
// Likely benign race in webrtc.org code - race while updating the
// minimum log severity.
"race:Loggable\n"
"race:UpdateMinLogSeverity\n"
//
// Likely benign write-write race in libevent to set a sticky boolean
// flag to true.
"race:event_debug_mode_too_late\n"
//
// Might lead to scheduled timers in libusrsctp getting dropped?
"race:sctp_handle_tick\n"
"race:sctp_handle_sack\n"
//
// Likely benign race in libusrsctp allocator during a free.
"race:system_base_info\n"
// Benign lock-order-inversion in libusrsctp
// No upstream bug filed!
"deadlock:sctp_add_to_readq\n"
// No Upstream Bug Filed!
//
// Probably benign - sqlite has a few optimizations where it does
// racy reads and then does properly synchronized integrity checks
// afterwards. Some concern of compiler optimizations messing this
// up due to "volatile" being too weak for this.
"race:third_party/sqlite3/*\n"
"deadlock:third_party/sqlite3/*\n"
//
// parking_lot using incorrect atomic orderings in RwLock, upstream
// fix already up for review.
"race:StrongRuleNode::ensure_child\n"
// No Bug - permanent
// Upstream Bugs:
//
//
// Probably a false-positive from crossbeam's deque not being
// understood by tsan.
"race:crossbeam_deque*::resize\n"
"race:crossbeam_deque*::push\n"
"race:crossbeam_deque*::write\n"
"race:crossbeam_deque*::read\n"
"race:crossbeam_deque*::steal\n"
// No Upstream Bug Filed!
//
// False positive in libc's tzset_internal
"race:tzset_internal\n"
// The rest of these suppressions are miscellaneous issues in gecko
// that should be investigated and ideally fixed.
// The StartupCache thread intentionally races with the main thread to
// trigger OS-level paging. It is never joined with the main thread.
"thread:StartupCache\n"
// When spawning async processes, we create a helper thread to wait for
// the process to terminate in order to asynchronously report the exit
// code to Gecko. This thread waits on a syscall for the process to end,
// which means there's no easy way to cancel and join it during Gecko
// shutdown. Suppress thread leak reports for this thread.
"thread:CreateMonitorThread\n"
"race:SkARGB32_Blitter\n"
"race:SkARGB32_Shader_Blitter\n"
"race:SkARGB32_Opaque_Blitter\n"
"race:SkRasterPipelineBlitter\n"
"race:Clamp_S32_D32_nofilter_trans_shaderproc\n"
"race:SkSpriteBlitter_Memcpy\n"
"race:CallInitFunc\n"
"race:ipv6_is_present\n"
"race:_dl_deallocate_tls\n"
"race:__libc_memalign\n"
"race:Sampler::sSigHandlerCoordinator\n"
"race:WebRtcAec_Create\n"
// No Bug - Logging bug in Mochitests
"race:mochitest/ssltunnel/ssltunnel.cpp\n"
// This thread does not seem to be stopped/joined.
// ImageBridgeChild should be turned back into a background
// can be removed.
"race:mozilla::layers::ImageBridgeChild::ShutDown\n"
"mutex:XErrorTrap\n"
"race:CamerasParent::ActorDestroy\n"
"race:CamerasParent::DispatchToVideoCaptureThread\n"
"race:VRShMem::PullSystemState\n"
"race:VRShMem::PushSystemState\n"
"race:VRShMem::PullBrowserState\n"
"race:VRShMem::PushBrowserState\n"
"race:storage::Connection::Release\n"
"race:image::ImageSurfaceCache::SuggestedSizeInternal\n"
"race:image::RasterImage::SetMetadata\n"
"race:image::RasterImage::GetWidth\n"
"race:webrender::profiler::register_thread\n"
"race:scale_blit\n"
"race:mozilla::gl::MesaMemoryLeakWorkaround\n"
"race:js::wasm::Code::bestTier\n"
"race:js::wasm::Code::commitTier2\n"
"race:js::wasm::Code::setTier2\n"
"race:js::wasm::Code::setAndBorrowTier2\n"
// The Glean init thread is used to perform I/O and other blocking operations.
// It is never joined with the main thread, but this is being re-evaluated.
"thread:glean::initialize\n"
// A race exists in libvulkan_lvp.so. This was previously addressed in bug
// 1816713. However, libvulkan_lvp.so is unloaded so a called_from_lib
// suppression cannot be used.
"race:libvulkan_lvp.so\n"
// TSan isn't aware of IPC; see bug for detailed explanation.
"race:LaunchAppWithForkServer\n"
// End of suppressions.
; // Please keep this semicolon.
}
// clang-format on
#endif // _MSC_VER