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//===-- ----------------------------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// Hwasan runtime flags.
# error "Define HWASAN_FLAG prior to including this file!"
// HWASAN_FLAG(Type, Name, DefaultValue, Description)
// See COMMON_FLAG in for more details.
HWASAN_FLAG(bool, verbose_threads, false,
"inform on thread creation/destruction")
HWASAN_FLAG(bool, tag_in_malloc, true, "")
HWASAN_FLAG(bool, tag_in_free, true, "")
HWASAN_FLAG(bool, print_stats, false, "")
HWASAN_FLAG(bool, halt_on_error, true, "")
HWASAN_FLAG(bool, atexit, false, "")
// Test only flag to disable malloc/realloc/free memory tagging on startup.
// Tagging can be reenabled with __hwasan_enable_allocator_tagging().
HWASAN_FLAG(bool, disable_allocator_tagging, false, "")
// If false, use simple increment of a thread local counter to generate new
// tags.
HWASAN_FLAG(bool, random_tags, true, "")
int, max_malloc_fill_size, 0,
"HWASan allocator flag. max_malloc_fill_size is the maximal amount of "
"bytes that will be filled with malloc_fill_byte on malloc.")
HWASAN_FLAG(bool, free_checks_tail_magic, 1,
"If set, free() will check the magic values "
"to the right of the allocated object "
"if the allocation size is not a divident of the granule size")
int, max_free_fill_size, 0,
"HWASan allocator flag. max_free_fill_size is the maximal amount of "
"bytes that will be filled with free_fill_byte during free.")
HWASAN_FLAG(int, malloc_fill_byte, 0xbe,
"Value used to fill the newly allocated memory.")
HWASAN_FLAG(int, free_fill_byte, 0x55,
"Value used to fill deallocated memory.")
HWASAN_FLAG(int, heap_history_size, 1023,
"The number of heap (de)allocations remembered per thread. "
"Affects the quality of heap-related reports, but not the ability "
"to find bugs.")
HWASAN_FLAG(bool, export_memory_stats, true,
"Export up-to-date memory stats through /proc")
HWASAN_FLAG(int, stack_history_size, 1024,
"The number of stack frames remembered per thread. "
"Affects the quality of stack-related reports, but not the ability "
"to find bugs.")
// Malloc / free bisection. Only tag malloc and free calls when a hash of
// allocation size and stack trace is between malloc_bisect_left and
// malloc_bisect_right (both inclusive). [0, 0] range is special and disables
// bisection (i.e. everything is tagged). Once the range is narrowed down
// enough, use malloc_bisect_dump to see interesting allocations.
HWASAN_FLAG(uptr, malloc_bisect_left, 0,
"Left bound of malloc bisection, inclusive.")
HWASAN_FLAG(uptr, malloc_bisect_right, 0,
"Right bound of malloc bisection, inclusive.")
HWASAN_FLAG(bool, malloc_bisect_dump, false,
"Print all allocations within [malloc_bisect_left, "
"malloc_bisect_right] range ")
// Exit if we fail to enable the AArch64 kernel ABI relaxation which allows
// tagged pointers in syscalls. This is the default, but being able to disable
// that behaviour is useful for running the testsuite on more platforms (the
// testsuite can run since we manually ensure any pointer arguments to syscalls
// are untagged before the call.
HWASAN_FLAG(bool, fail_without_syscall_abi, true,
"Exit if fail to request relaxed syscall ABI.")