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//=-- lsan.cpp ------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of LeakSanitizer.
// Standalone LSan RTL.
//
//===----------------------------------------------------------------------===//
#include "lsan.h"
#include "sanitizer_common/sanitizer_flags.h"
#include "sanitizer_common/sanitizer_flag_parser.h"
#include "lsan_allocator.h"
#include "lsan_common.h"
#include "lsan_thread.h"
bool lsan_inited;
bool lsan_init_is_running;
namespace __lsan {
///// Interface to the common LSan module. /////
bool WordIsPoisoned(uptr addr) {
return false;
}
} // namespace __lsan
void __sanitizer::BufferedStackTrace::UnwindImpl(
uptr pc, uptr bp, void *context, bool request_fast, u32 max_depth) {
using namespace __lsan;
uptr stack_top = 0, stack_bottom = 0;
if (ThreadContext *t = CurrentThreadContext()) {
stack_top = t->stack_end();
stack_bottom = t->stack_begin();
}
if (SANITIZER_MIPS && !IsValidFrame(bp, stack_top, stack_bottom))
return;
bool fast = StackTrace::WillUseFastUnwind(request_fast);
Unwind(max_depth, pc, bp, context, stack_top, stack_bottom, fast);
}
using namespace __lsan;
static void InitializeFlags() {
// Set all the default values.
SetCommonFlagsDefaults();
{
CommonFlags cf;
cf.CopyFrom(*common_flags());
cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH");
cf.malloc_context_size = 30;
cf.intercept_tls_get_addr = true;
cf.detect_leaks = true;
cf.exitcode = 23;
OverrideCommonFlags(cf);
}
Flags *f = flags();
f->SetDefaults();
FlagParser parser;
RegisterLsanFlags(&parser, f);
RegisterCommonFlags(&parser);
// Override from user-specified string.
const char *lsan_default_options = __lsan_default_options();
parser.ParseString(lsan_default_options);
parser.ParseStringFromEnv("LSAN_OPTIONS");
InitializeCommonFlags();
if (Verbosity()) ReportUnrecognizedFlags();
if (common_flags()->help) parser.PrintFlagDescriptions();
__sanitizer_set_report_path(common_flags()->log_path);
}
extern "C" void __lsan_init() {
CHECK(!lsan_init_is_running);
if (lsan_inited)
return;
lsan_init_is_running = true;
SanitizerToolName = "LeakSanitizer";
CacheBinaryName();
AvoidCVE_2016_2143();
InitializeFlags();
InitCommonLsan();
InitializeAllocator();
ReplaceSystemMalloc();
InitTlsSize();
InitializeInterceptors();
InitializeThreadRegistry();
InstallDeadlySignalHandlers(LsanOnDeadlySignal);
InitializeMainThread();
if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
Atexit(DoLeakCheck);
InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
lsan_inited = true;
lsan_init_is_running = false;
}
extern "C" SANITIZER_INTERFACE_ATTRIBUTE
void __sanitizer_print_stack_trace() {
GET_STACK_TRACE_FATAL;
stack.Print();
}
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