mirror of
https://github.com/Gericom/teak-llvm.git
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f0fbeaf44a
Summary: This tunes several of the default parameters used within the allocator: - disable the deallocation type mismatch on Android by default; this was causing too many issues with third party libraries; - change the default `SizeClassMap` to `Dense`, it caches less entries and is way more memory efficient overall; - relax the timing of the RSS checks, 10 times per second was too much, lower it to 4 times (every 250ms), and update the test so that it passes with the new default. Reviewers: eugenis Reviewed By: eugenis Subscribers: srhines, delcypher, #sanitizers, llvm-commits Differential Revision: https://reviews.llvm.org/D57116 llvm-svn: 352057
94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
//===-- scudo_platform.h ----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// Scudo platform specific definitions.
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/// TODO(kostyak): add tests for the compile time defines.
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///
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//===----------------------------------------------------------------------===//
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#ifndef SCUDO_PLATFORM_H_
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#define SCUDO_PLATFORM_H_
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#include "sanitizer_common/sanitizer_allocator.h"
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#if !SANITIZER_LINUX && !SANITIZER_FUCHSIA
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# error "The Scudo hardened allocator is not supported on this platform."
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#endif
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#define SCUDO_TSD_EXCLUSIVE_SUPPORTED (!SANITIZER_ANDROID && !SANITIZER_FUCHSIA)
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#ifndef SCUDO_TSD_EXCLUSIVE
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// SCUDO_TSD_EXCLUSIVE wasn't defined, use a default TSD model for the platform.
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# if SANITIZER_ANDROID || SANITIZER_FUCHSIA
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// Android and Fuchsia use a pool of TSDs shared between threads.
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# define SCUDO_TSD_EXCLUSIVE 0
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# elif SANITIZER_LINUX && !SANITIZER_ANDROID
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// Non-Android Linux use an exclusive TSD per thread.
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# define SCUDO_TSD_EXCLUSIVE 1
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# else
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# error "No default TSD model defined for this platform."
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# endif // SANITIZER_ANDROID || SANITIZER_FUCHSIA
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#endif // SCUDO_TSD_EXCLUSIVE
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// If the exclusive TSD model is chosen, make sure the platform supports it.
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#if SCUDO_TSD_EXCLUSIVE && !SCUDO_TSD_EXCLUSIVE_SUPPORTED
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# error "The exclusive TSD model is not supported on this platform."
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#endif
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// Maximum number of TSDs that can be created for the Shared model.
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#ifndef SCUDO_SHARED_TSD_POOL_SIZE
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# if SANITIZER_ANDROID
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# define SCUDO_SHARED_TSD_POOL_SIZE 2U
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# else
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# define SCUDO_SHARED_TSD_POOL_SIZE 32U
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# endif // SANITIZER_ANDROID
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#endif // SCUDO_SHARED_TSD_POOL_SIZE
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// The following allows the public interface functions to be disabled.
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#ifndef SCUDO_CAN_USE_PUBLIC_INTERFACE
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# define SCUDO_CAN_USE_PUBLIC_INTERFACE 1
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#endif
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// Hooks in the allocation & deallocation paths can become a security concern if
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// implemented improperly, or if overwritten by an attacker. Use with caution.
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#ifndef SCUDO_CAN_USE_HOOKS
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# if SANITIZER_FUCHSIA
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# define SCUDO_CAN_USE_HOOKS 1
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# else
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# define SCUDO_CAN_USE_HOOKS 0
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# endif // SANITIZER_FUCHSIA
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#endif // SCUDO_CAN_USE_HOOKS
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namespace __scudo {
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#if SANITIZER_CAN_USE_ALLOCATOR64
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# if defined(__aarch64__) && SANITIZER_ANDROID
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const uptr AllocatorSize = 0x4000000000ULL; // 256G.
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# elif defined(__aarch64__)
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const uptr AllocatorSize = 0x10000000000ULL; // 1T.
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# else
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const uptr AllocatorSize = 0x40000000000ULL; // 4T.
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# endif
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#else
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const uptr RegionSizeLog = SANITIZER_ANDROID ? 19 : 20;
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#endif // SANITIZER_CAN_USE_ALLOCATOR64
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#if !defined(SCUDO_SIZE_CLASS_MAP)
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# define SCUDO_SIZE_CLASS_MAP Dense
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#endif
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#define SIZE_CLASS_MAP_TYPE SIZE_CLASS_MAP_TYPE_(SCUDO_SIZE_CLASS_MAP)
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#define SIZE_CLASS_MAP_TYPE_(T) SIZE_CLASS_MAP_TYPE__(T)
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#define SIZE_CLASS_MAP_TYPE__(T) T##SizeClassMap
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typedef SIZE_CLASS_MAP_TYPE SizeClassMap;
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} // namespace __scudo
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#endif // SCUDO_PLATFORM_H_
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