1 //===-- flags.inc -----------------------------------------------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
10 #error "Define SCUDO_FLAG prior to including this file!"
13 SCUDO_FLAG(int, quarantine_size_kb, 0,
14 "Size (in kilobytes) of quarantine used to delay the actual "
15 "deallocation of chunks. Lower value may reduce memory usage but "
16 "decrease the effectiveness of the mitigation.")
18 SCUDO_FLAG(int, thread_local_quarantine_size_kb, 0,
19 "Size (in kilobytes) of per-thread cache used to offload the global "
20 "quarantine. Lower value may reduce memory usage but might increase "
21 "the contention on the global quarantine.")
23 SCUDO_FLAG(int, quarantine_max_chunk_size, 0,
24 "Size (in bytes) up to which chunks will be quarantined (if lower "
27 SCUDO_FLAG(bool, dealloc_type_mismatch, false,
28 "Terminate on a type mismatch in allocation-deallocation functions, "
29 "eg: malloc/delete, new/free, new/delete[], etc.")
31 SCUDO_FLAG(bool, delete_size_mismatch, true,
32 "Terminate on a size mismatch between a sized-delete and the actual "
33 "size of a chunk (as provided to new/new[]).")
35 SCUDO_FLAG(bool, zero_contents, false, "Zero chunk contents on allocation.")
37 SCUDO_FLAG(bool, pattern_fill_contents, false,
38 "Pattern fill chunk contents on allocation.")
40 SCUDO_FLAG(bool, may_return_null, true,
41 "Indicate whether the allocator should terminate instead of "
42 "returning NULL in otherwise non-fatal error scenarios, eg: OOM, "
43 "invalid allocation alignments, etc.")
45 SCUDO_FLAG(int, release_to_os_interval_ms, SCUDO_ANDROID ? INT32_MIN : 5000,
46 "Interval (in milliseconds) at which to attempt release of unused "
47 "memory to the OS. Negative values disable the feature.")
49 SCUDO_FLAG(int, allocation_ring_buffer_size, 32768,
50 "Entries to keep in the allocation ring buffer for scudo.")