asan_flags.h revision 4e21c6bc78bdc36736cd61639a160ea5f725b333
1//===-- asan_flags.h -------------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file is a part of AddressSanitizer, an address sanity checker. 11// 12// ASan runtime flags. 13//===----------------------------------------------------------------------===// 14 15#ifndef ASAN_FLAGS_H 16#define ASAN_FLAGS_H 17 18#include "sanitizer_common/sanitizer_interface_defs.h" 19 20// ASan flag values can be defined in three ways: 21// 1) initialized with default values at startup. 22// 2) overriden from string returned by user-specified function 23// __asan_default_options(). 24// 3) overriden from env variable ASAN_OPTIONS. 25 26extern "C" { 27// Can be overriden by user. 28const char *__asan_default_options() SANITIZER_WEAK_ATTRIBUTE; 29} // extern "C" 30 31namespace __asan { 32 33struct Flags { 34 // Size (in bytes) of quarantine used to detect use-after-free errors. 35 // Lower value may reduce memory usage but increase the chance of 36 // false negatives. 37 int quarantine_size; 38 // If set, uses in-process symbolizer from common sanitizer runtime. 39 bool symbolize; 40 // Verbosity level (0 - silent, 1 - a bit of output, 2+ - more output). 41 int verbosity; 42 // Size (in bytes) of redzones around heap objects. 43 // Requirement: redzone >= 32, is a power of two. 44 int redzone; 45 // If set, prints some debugging information and does additional checks. 46 bool debug; 47 // Controls the way to handle globals (0 - don't detect buffer overflow 48 // on globals, 1 - detect buffer overflow, 2 - print data about registered 49 // globals). 50 int report_globals; 51 // Max number of stack frames kept for each allocation. 52 int malloc_context_size; 53 // If set, uses custom wrappers and replacements for libc string functions 54 // to find more errors. 55 bool replace_str; 56 // If set, uses custom wrappers for memset/memcpy/memmove intinsics. 57 bool replace_intrin; 58 // Used on Mac only. See comments in asan_mac.cc and asan_malloc_mac.cc. 59 bool replace_cfallocator; 60 // Used on Mac only. 61 bool mac_ignore_invalid_free; 62 // ASan allocator flag. See asan_allocator.cc. 63 bool use_fake_stack; 64 // ASan allocator flag. Sets the maximal size of allocation request 65 // that would return memory filled with zero bytes. 66 int max_malloc_fill_size; 67 // Override exit status if something was reported. 68 int exitcode; 69 // If set, user may manually mark memory regions as poisoned or unpoisoned. 70 bool allow_user_poisoning; 71 // Number of seconds to sleep between printing an error report and 72 // terminating application. Useful for debug purposes (when one needs 73 // to attach gdb, for example). 74 int sleep_before_dying; 75 // If set, registers ASan custom segv handler. 76 bool handle_segv; 77 // If set, uses alternate stack for signal handling. 78 bool use_sigaltstack; 79 // Allow the users to work around the bug in Nvidia drivers prior to 295.*. 80 bool check_malloc_usable_size; 81 // If set, explicitly unmaps (huge) shadow at exit. 82 bool unmap_shadow_on_exit; 83 // If set, calls abort() instead of _exit() after printing an error report. 84 bool abort_on_error; 85 // If set, prints ASan exit stats even after program terminates successfully. 86 bool atexit; 87 // By default, disable core dumper on 64-bit - it makes little sense 88 // to dump 16T+ core. 89 bool disable_core; 90 // Strips this prefix from file paths in error reports. 91 const char *strip_path_prefix; 92}; 93 94Flags *flags(); 95void InitializeFlags(Flags *f, const char *env); 96 97} // namespace __asan 98 99#endif // ASAN_FLAGS_H 100