forked from OSchip/llvm-project
142 lines
4.5 KiB
C++
142 lines
4.5 KiB
C++
//===-- asan_flags.cc -------------------------------------------*- C++ -*-===//
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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 AddressSanitizer, an address sanity checker.
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//
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// ASan flag parsing logic.
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//===----------------------------------------------------------------------===//
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#include "asan_activation.h"
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#include "asan_flags.h"
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#include "asan_interface_internal.h"
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#include "asan_stack.h"
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#include "lsan/lsan_common.h"
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#include "sanitizer_common/sanitizer_common.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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namespace __asan {
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Flags asan_flags_dont_use_directly; // use via flags().
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static const char *MaybeCallAsanDefaultOptions() {
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return (&__asan_default_options) ? __asan_default_options() : "";
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}
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static const char *MaybeUseAsanDefaultOptionsCompileDefinition() {
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#ifdef ASAN_DEFAULT_OPTIONS
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// Stringize the macro value.
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# define ASAN_STRINGIZE(x) #x
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# define ASAN_STRINGIZE_OPTIONS(options) ASAN_STRINGIZE(options)
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return ASAN_STRINGIZE_OPTIONS(ASAN_DEFAULT_OPTIONS);
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#else
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return "";
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#endif
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}
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void Flags::SetDefaults() {
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#define ASAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
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#include "asan_flags.inc"
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#undef ASAN_FLAG
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}
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void RegisterAsanFlags(FlagParser *parser, Flags *f) {
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#define ASAN_FLAG(Type, Name, DefaultValue, Description) \
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RegisterFlag(parser, #Name, Description, &f->Name);
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#include "asan_flags.inc"
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#undef ASAN_FLAG
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}
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void InitializeFlags(Flags *f) {
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FlagParser parser;
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RegisterAsanFlags(&parser, f);
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RegisterCommonFlags(&parser);
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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.detect_leaks = CAN_SANITIZE_LEAKS;
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cf.external_symbolizer_path = GetEnv("ASAN_SYMBOLIZER_PATH");
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cf.malloc_context_size = kDefaultMallocContextSize;
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cf.intercept_tls_get_addr = true;
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OverrideCommonFlags(cf);
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}
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const int kDefaultQuarantineSizeMb = (ASAN_LOW_MEMORY) ? 1UL << 6 : 1UL << 8;
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f->SetDefaults();
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// Override from compile definition.
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const char *compile_def = MaybeUseAsanDefaultOptionsCompileDefinition();
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parser.ParseString(compile_def);
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// Override from user-specified string.
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const char *default_options = MaybeCallAsanDefaultOptions();
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parser.ParseString(default_options);
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// Override from command line.
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const char *env = GetEnv("ASAN_OPTIONS");
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if (env) parser.ParseString(env);
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// Let activation flags override current settings. On Android they come
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// from a system property. On other platforms this is no-op.
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if (!flags()->start_deactivated) {
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char buf[100];
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GetExtraActivationFlags(buf, sizeof(buf));
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parser.ParseString(buf);
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}
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SetVerbosity(common_flags()->verbosity);
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// TODO(eugenis): dump all flags at verbosity>=2?
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if (Verbosity()) ReportUnrecognizedFlags();
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if (common_flags()->help) parser.PrintFlagDescriptions();
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// Flag validation:
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if (!CAN_SANITIZE_LEAKS && common_flags()->detect_leaks) {
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Report("%s: detect_leaks is not supported on this platform.\n",
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SanitizerToolName);
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Die();
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}
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// Make "strict_init_order" imply "check_initialization_order".
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// TODO(samsonov): Use a single runtime flag for an init-order checker.
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if (f->strict_init_order) {
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f->check_initialization_order = true;
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}
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CHECK_LE((uptr)common_flags()->malloc_context_size, kStackTraceMax);
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CHECK_LE(f->min_uar_stack_size_log, f->max_uar_stack_size_log);
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CHECK_GE(f->redzone, 16);
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CHECK_GE(f->max_redzone, f->redzone);
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CHECK_LE(f->max_redzone, 2048);
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CHECK(IsPowerOfTwo(f->redzone));
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CHECK(IsPowerOfTwo(f->max_redzone));
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// quarantine_size is deprecated but we still honor it.
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// quarantine_size can not be used together with quarantine_size_mb.
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if (f->quarantine_size >= 0 && f->quarantine_size_mb >= 0) {
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Report("%s: please use either 'quarantine_size' (deprecated) or "
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"quarantine_size_mb, but not both\n", SanitizerToolName);
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Die();
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}
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if (f->quarantine_size >= 0)
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f->quarantine_size_mb = f->quarantine_size >> 20;
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if (f->quarantine_size_mb < 0)
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f->quarantine_size_mb = kDefaultQuarantineSizeMb;
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}
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} // namespace __asan
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#if !SANITIZER_SUPPORTS_WEAK_HOOKS
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extern "C" {
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SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
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const char* __asan_default_options() { return ""; }
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} // extern "C"
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#endif
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