forked from OSchip/llvm-project
119 lines
3.1 KiB
C++
119 lines
3.1 KiB
C++
//=-- lsan.cc -------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of LeakSanitizer.
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// Standalone LSan RTL.
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//
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//===----------------------------------------------------------------------===//
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#include "lsan.h"
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#include "sanitizer_common/sanitizer_flags.h"
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#include "sanitizer_common/sanitizer_flag_parser.h"
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#include "sanitizer_common/sanitizer_stacktrace.h"
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#include "lsan_allocator.h"
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#include "lsan_common.h"
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#include "lsan_thread.h"
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bool lsan_inited;
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bool lsan_init_is_running;
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namespace __lsan {
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///// Interface to the common LSan module. /////
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bool WordIsPoisoned(uptr addr) {
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return false;
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}
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} // namespace __lsan
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using namespace __lsan; // NOLINT
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static void InitializeFlags() {
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// Set all the default values.
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SetCommonFlagsDefaults();
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{
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CommonFlags cf;
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cf.CopyFrom(*common_flags());
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cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH");
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cf.malloc_context_size = 30;
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cf.intercept_tls_get_addr = true;
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cf.detect_leaks = true;
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cf.exitcode = 23;
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OverrideCommonFlags(cf);
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}
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Flags *f = flags();
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f->SetDefaults();
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FlagParser parser;
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RegisterLsanFlags(&parser, f);
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RegisterCommonFlags(&parser);
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// Override from user-specified string.
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const char *lsan_default_options = MaybeCallLsanDefaultOptions();
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parser.ParseString(lsan_default_options);
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parser.ParseString(GetEnv("LSAN_OPTIONS"));
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SetVerbosity(common_flags()->verbosity);
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if (Verbosity()) ReportUnrecognizedFlags();
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if (common_flags()->help) parser.PrintFlagDescriptions();
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__sanitizer_set_report_path(common_flags()->log_path);
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}
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static void OnStackUnwind(const SignalContext &sig, const void *,
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BufferedStackTrace *stack) {
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GetStackTrace(stack, kStackTraceMax, sig.pc, sig.bp, sig.context,
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common_flags()->fast_unwind_on_fatal);
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}
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static void LsanOnDeadlySignal(int signo, void *siginfo, void *context) {
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HandleDeadlySignal(siginfo, context, GetCurrentThread(), &OnStackUnwind,
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nullptr);
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}
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extern "C" void __lsan_init() {
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CHECK(!lsan_init_is_running);
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if (lsan_inited)
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return;
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lsan_init_is_running = true;
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SanitizerToolName = "LeakSanitizer";
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CacheBinaryName();
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AvoidCVE_2016_2143();
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InitializeFlags();
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InitCommonLsan();
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InitializeAllocator();
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ReplaceSystemMalloc();
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InitTlsSize();
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InitializeInterceptors();
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InitializeThreadRegistry();
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InstallDeadlySignalHandlers(LsanOnDeadlySignal);
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u32 tid = ThreadCreate(0, 0, true);
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CHECK_EQ(tid, 0);
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ThreadStart(tid, GetTid());
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SetCurrentThread(tid);
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if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
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Atexit(DoLeakCheck);
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InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
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lsan_inited = true;
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lsan_init_is_running = false;
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}
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extern "C" SANITIZER_INTERFACE_ATTRIBUTE
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void __sanitizer_print_stack_trace() {
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GET_STACK_TRACE_FATAL;
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stack.Print();
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}
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