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_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 26 namespace __asan { 27 28 struct Flags { 29 // Size (in bytes) of quarantine used to detect use-after-free errors. 30 // Lower value may reduce memory usage but increase the chance of 31 // false negatives. 32 int quarantine_size; 33 // If set, uses in-process symbolizer from common sanitizer runtime. 34 bool symbolize; 35 // Verbosity level (0 - silent, 1 - a bit of output, 2+ - more output). 36 int verbosity; 37 // Size (in bytes) of redzones around heap objects. 38 // Requirement: redzone >= 32, is a power of two. 39 int redzone; 40 // If set, prints some debugging information and does additional checks. 41 bool debug; 42 // Controls the way to handle globals (0 - don't detect buffer overflow 43 // on globals, 1 - detect buffer overflow, 2 - print data about registered 44 // globals). 45 int report_globals; 46 // If set, attempts to catch initialization order issues. 47 bool check_initialization_order; 48 // Max number of stack frames kept for each allocation. 49 int malloc_context_size; 50 // If set, uses custom wrappers and replacements for libc string functions 51 // to find more errors. 52 bool replace_str; 53 // If set, uses custom wrappers for memset/memcpy/memmove intinsics. 54 bool replace_intrin; 55 // Used on Mac only. See comments in asan_mac.cc and asan_malloc_mac.cc. 56 bool replace_cfallocator; 57 // Used on Mac only. 58 bool mac_ignore_invalid_free; 59 // ASan allocator flag. See asan_allocator.cc. 60 bool use_fake_stack; 61 // ASan allocator flag. Sets the maximal size of allocation request 62 // that would return memory filled with zero bytes. 63 int max_malloc_fill_size; 64 // Override exit status if something was reported. 65 int exitcode; 66 // If set, user may manually mark memory regions as poisoned or unpoisoned. 67 bool allow_user_poisoning; 68 // Number of seconds to sleep between printing an error report and 69 // terminating application. Useful for debug purposes (when one needs 70 // to attach gdb, for example). 71 int sleep_before_dying; 72 // If set, registers ASan custom segv handler. 73 bool handle_segv; 74 // If set, uses alternate stack for signal handling. 75 bool use_sigaltstack; 76 // Allow the users to work around the bug in Nvidia drivers prior to 295.*. 77 bool check_malloc_usable_size; 78 // If set, explicitly unmaps (huge) shadow at exit. 79 bool unmap_shadow_on_exit; 80 // If set, calls abort() instead of _exit() after printing an error report. 81 bool abort_on_error; 82 // If set, prints ASan exit stats even after program terminates successfully. 83 bool atexit; 84 // By default, disable core dumper on 64-bit - it makes little sense 85 // to dump 16T+ core. 86 bool disable_core; 87 // Allow the tool to re-exec the program. This may interfere badly with the 88 // debugger. 89 bool allow_reexec; 90 // Strips this prefix from file paths in error reports. 91 const char *strip_path_prefix; 92 // If set, prints not only thread creation stacks for threads in error report, 93 // but also thread creation stacks for threads that created those threads, 94 // etc. up to main thread. 95 bool print_full_thread_history; 96 }; 97 98 Flags *flags(); 99 void InitializeFlags(Flags *f, const char *env); 100 101 } // namespace __asan 102 103 #endif // ASAN_FLAGS_H 104
