21d50019ca
Introduce a function __scudo_get_error_info() that may be called to interpret a crash resulting from a memory error, potentially in another process, given information extracted from the crashing process. The crash may be interpreted as a use-after-free, buffer overflow or buffer underflow. Also introduce a feature to optionally record a stack trace for each allocation and deallocation. If this feature is enabled, a stack trace for the allocation and (if applicable) the deallocation will also be available via __scudo_get_error_info(). Differential Revision: https://reviews.llvm.org/D77283
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
//===-- wrappers_c_bionic.cpp -----------------------------------*- 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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#include "platform.h"
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// This is only used when compiled as part of Bionic.
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#if SCUDO_ANDROID && _BIONIC
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#include "allocator_config.h"
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#include "wrappers_c.h"
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#include "wrappers_c_checks.h"
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#include <stdint.h>
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#include <stdio.h>
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// Regular MallocDispatch definitions.
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#define SCUDO_PREFIX(name) CONCATENATE(scudo_, name)
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#define SCUDO_ALLOCATOR Allocator
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extern "C" void SCUDO_PREFIX(malloc_postinit)();
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static scudo::Allocator<scudo::AndroidConfig, SCUDO_PREFIX(malloc_postinit)>
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SCUDO_ALLOCATOR;
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#include "wrappers_c.inc"
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#undef SCUDO_ALLOCATOR
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#undef SCUDO_PREFIX
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// Svelte MallocDispatch definitions.
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#define SCUDO_PREFIX(name) CONCATENATE(scudo_svelte_, name)
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#define SCUDO_ALLOCATOR SvelteAllocator
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extern "C" void SCUDO_PREFIX(malloc_postinit)();
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static scudo::Allocator<scudo::AndroidSvelteConfig,
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SCUDO_PREFIX(malloc_postinit)>
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SCUDO_ALLOCATOR;
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#include "wrappers_c.inc"
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#undef SCUDO_ALLOCATOR
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#undef SCUDO_PREFIX
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// TODO(kostyak): support both allocators.
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INTERFACE void __scudo_print_stats(void) { Allocator.printStats(); }
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INTERFACE void __scudo_get_error_info(
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struct scudo_error_info *error_info, uintptr_t fault_addr,
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const char *stack_depot, const char *region_info, const char *memory,
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const char *memory_tags, uintptr_t memory_addr, size_t memory_size) {
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Allocator.getErrorInfo(error_info, fault_addr, stack_depot, region_info,
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memory, memory_tags, memory_addr, memory_size);
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}
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INTERFACE const char *__scudo_get_stack_depot_addr() {
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return Allocator.getStackDepotAddress();
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}
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INTERFACE size_t __scudo_get_stack_depot_size() {
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return sizeof(scudo::StackDepot);
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}
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INTERFACE const char *__scudo_get_region_info_addr() {
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return Allocator.getRegionInfoArrayAddress();
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}
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INTERFACE size_t __scudo_get_region_info_size() {
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return Allocator.getRegionInfoArraySize();
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}
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#endif // SCUDO_ANDROID && _BIONIC
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