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Standardize on GCC for TSAN conditional compilation (#8543)

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Summary:
In https://github.com/facebook/rocksdb/issues/8539 I accidentally only checked for GCC TSAN, which is
what I tested locally, while CircleCI and FB CI use clang TSAN. Related:
other existing code like in stack_trace.cc only check for clang TSAN.

I've now standardized these to the GCC convention in port/lang.h, so now

    #ifdef __SANITIZE_THREAD__

can check for any TSAN (assuming lang.h include)

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8543

Test Plan:
Put an assert(false) in slice_test and look for the NOTE
about "signal-unsafe call", both GCC and clang. Eventually, CircleCI
TSAN in https://github.com/facebook/rocksdb/issues/8538

Reviewed By: zhichao-cao

Differential Revision: D29728483

Pulled By: pdillinger

fbshipit-source-id: 8a3b8015c2ed48078214c3ee17146a2c3f11c9f7
This commit is contained in:
Peter Dillinger 2021-07-15 23:49:12 -07:00
parent a28f13c937
commit 300b2249dc
3 changed files with 21 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
port/lang.h
View File

@ -15,6 +15,8 @@
#endif
#endif
// ASAN (Address sanitizer)
#if defined(__clang__)
#if defined(__has_feature)
#if __has_feature(address_sanitizer)
@ -39,3 +41,18 @@
#else
#define STATIC_AVOID_DESTRUCTION(Type, name) static Type& name = *new Type
#endif
// TSAN (Thread sanitizer)
// For simplicity, standardize on the GCC define
#if defined(__clang__)
#if defined(__has_feature) && __has_feature(thread_sanitizer)
#define __SANITIZE_THREAD__ 1
#endif // __has_feature(thread_sanitizer)
#endif // __clang__
#ifdef __SANITIZE_THREAD__
#define TSAN_SUPPRESSION __attribute__((no_sanitize("thread")))
#else
#define TSAN_SUPPRESSION
#endif // TSAN_SUPPRESSION

6
port/stack_trace.cc
View File

@ -36,6 +36,8 @@ void* SaveStack(int* /*num_frames*/, int /*first_frames_to_skip*/) {
#include <sys/sysctl.h>
#endif
#include "port/lang.h"
namespace ROCKSDB_NAMESPACE {
namespace port {
@ -163,8 +165,7 @@ static void StackTraceHandler(int sig) {
// Efforts to fix or suppress TSAN warnings "signal-unsafe call inside of
// a signal" have failed, so just warn the user about them.
#if defined(__clang__) && defined(__has_feature)
#if __has_feature(thread_sanitizer)
#ifdef __SANITIZE_THREAD__
fprintf(stderr,
"==> NOTE: any above warnings about \"signal-unsafe call\" are\n"
"==> ignorable, as they are expected when generating a stack\n"
@ -173,7 +174,6 @@ static void StackTraceHandler(int sig) {
"==> in the TSAN warning can be useful for that. (The stack\n"
"==> trace printed by the signal handler is likely obscured\n"
"==> by TSAN output.)\n");
#endif
#endif
// re-signal to default handler (so we still get core dump if needed...)

15
trace_replay/io_tracer.h
View File

@ -9,6 +9,7 @@
#include <fstream>
#include "monitoring/instrumented_mutex.h"
#include "port/lang.h"
#include "rocksdb/file_system.h"
#include "rocksdb/options.h"
#include "trace_replay/trace_replay.h"
@ -157,20 +158,6 @@ class IOTracer {
// mutex and ignore the operation if writer_is null. So its ok if
// tracing_enabled shows non updated value.
#if defined(__clang__)
#if defined(__has_feature) && __has_feature(thread_sanitizer)
#define TSAN_SUPPRESSION __attribute__((no_sanitize("thread")))
#endif // __has_feature(thread_sanitizer)
#else // __clang__
#ifdef __SANITIZE_THREAD__
#define TSAN_SUPPRESSION __attribute__((no_sanitize("thread")))
#endif // __SANITIZE_THREAD__
#endif // __clang__
#ifndef TSAN_SUPPRESSION
#define TSAN_SUPPRESSION
#endif // TSAN_SUPPRESSION
// Start writing IO operations to the trace_writer.
TSAN_SUPPRESSION Status
StartIOTrace(SystemClock* clock, const TraceOptions& trace_options,