120 lines
4.7 KiB
C++
120 lines
4.7 KiB
C++
//===-- asan_flags.h -------------------------------------------*- C++ -*-===//
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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 runtime flags.
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//===----------------------------------------------------------------------===//
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#ifndef ASAN_FLAGS_H
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#define ASAN_FLAGS_H
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#include "sanitizer_common/sanitizer_internal_defs.h"
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// ASan flag values can be defined in four ways:
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// 1) initialized with default values at startup.
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// 2) overriden during compilation of ASan runtime by providing
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// compile definition ASAN_DEFAULT_OPTIONS.
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// 3) overriden from string returned by user-specified function
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// __asan_default_options().
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// 4) overriden from env variable ASAN_OPTIONS.
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namespace __asan {
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struct Flags {
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// Size (in bytes) of quarantine used to detect use-after-free errors.
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// Lower value may reduce memory usage but increase the chance of
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// false negatives.
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int quarantine_size;
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// Verbosity level (0 - silent, 1 - a bit of output, 2+ - more output).
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int verbosity;
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// Size (in bytes) of redzones around heap objects.
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// Requirement: redzone >= 32, is a power of two.
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int redzone;
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// If set, prints some debugging information and does additional checks.
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bool debug;
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// Controls the way to handle globals (0 - don't detect buffer overflow
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// on globals, 1 - detect buffer overflow, 2 - print data about registered
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// globals).
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int report_globals;
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// If set, attempts to catch initialization order issues.
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bool check_initialization_order;
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// If set, uses custom wrappers and replacements for libc string functions
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// to find more errors.
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bool replace_str;
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// If set, uses custom wrappers for memset/memcpy/memmove intinsics.
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bool replace_intrin;
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// Used on Mac only.
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bool mac_ignore_invalid_free;
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// Enables stack-use-after-return checking at run-time.
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bool detect_stack_use_after_return;
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// The minimal fake stack size log.
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int uar_stack_size_log;
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// ASan allocator flag. max_malloc_fill_size is the maximal amount of bytes
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// that will be filled with malloc_fill_byte on malloc.
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int max_malloc_fill_size, malloc_fill_byte;
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// Override exit status if something was reported.
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int exitcode;
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// If set, user may manually mark memory regions as poisoned or unpoisoned.
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bool allow_user_poisoning;
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// Number of seconds to sleep between printing an error report and
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// terminating application. Useful for debug purposes (when one needs
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// to attach gdb, for example).
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int sleep_before_dying;
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// If set, registers ASan custom segv handler.
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bool handle_segv;
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// If set, allows user register segv handler even if ASan registers one.
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bool allow_user_segv_handler;
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// If set, uses alternate stack for signal handling.
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bool use_sigaltstack;
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// Allow the users to work around the bug in Nvidia drivers prior to 295.*.
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bool check_malloc_usable_size;
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// If set, explicitly unmaps (huge) shadow at exit.
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bool unmap_shadow_on_exit;
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// If set, calls abort() instead of _exit() after printing an error report.
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bool abort_on_error;
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// Print various statistics after printing an error message or if atexit=1.
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bool print_stats;
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// Print the legend for the shadow bytes.
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bool print_legend;
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// If set, prints ASan exit stats even after program terminates successfully.
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bool atexit;
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// By default, disable core dumper on 64-bit - it makes little sense
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// to dump 16T+ core.
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bool disable_core;
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// Allow the tool to re-exec the program. This may interfere badly with the
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// debugger.
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bool allow_reexec;
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// If set, prints not only thread creation stacks for threads in error report,
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// but also thread creation stacks for threads that created those threads,
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// etc. up to main thread.
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bool print_full_thread_history;
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// Poison (or not) the heap memory on [de]allocation. Zero value is useful
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// for benchmarking the allocator or instrumentator.
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bool poison_heap;
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// Report errors on malloc/delete, new/free, new/delete[], etc.
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bool alloc_dealloc_mismatch;
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// Use stack depot instead of storing stacks in the redzones.
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bool use_stack_depot;
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// If true, assume that memcmp(p1, p2, n) always reads n bytes before
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// comparing p1 and p2.
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bool strict_memcmp;
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// If true, assume that dynamic initializers can never access globals from
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// other modules, even if the latter are already initialized.
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bool strict_init_order;
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};
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extern Flags asan_flags_dont_use_directly;
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inline Flags *flags() {
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return &asan_flags_dont_use_directly;
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}
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void InitializeFlags(Flags *f, const char *env);
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} // namespace __asan
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#endif // ASAN_FLAGS_H
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