| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <errno.h> |
| #include <malloc.h> |
| #include <stdlib.h> |
| #include <sys/mman.h> |
| #include <sys/param.h> |
| #include <sys/prctl.h> |
| |
| #include "private/bionic_macros.h" |
| |
| #include "scudo.h" |
| |
| // Disable Scudo's mismatch allocation check, as it is being triggered |
| // by some third party code. |
| extern "C" const char *__scudo_default_options() { |
| return "DeallocationTypeMismatch=false"; |
| } |
| |
| static inline bool AllocTooBig(size_t bytes) { |
| #if defined(__LP64__) |
| if (__predict_false(bytes > 0x10000000000ULL)) { |
| #else |
| if (__predict_false(bytes > 0x80000000ULL)) { |
| #endif |
| return true; |
| } |
| return false; |
| } |
| |
| void* scudo_aligned_alloc(size_t alignment, size_t size) { |
| if (alignment == 0 || !powerof2(alignment) || (size % alignment) != 0) { |
| errno = EINVAL; |
| return nullptr; |
| } |
| if (AllocTooBig(size)) { |
| errno = ENOMEM; |
| return nullptr; |
| } |
| |
| return aligned_alloc(alignment, size); |
| } |
| |
| void* scudo_calloc(size_t item_count, size_t item_size) { |
| size_t total; |
| if (__builtin_mul_overflow(item_count, item_size, &total) || AllocTooBig(total)) { |
| errno = ENOMEM; |
| return nullptr; |
| } |
| return calloc(item_count, item_size); |
| } |
| |
| void scudo_free(void* ptr) { |
| free(ptr); |
| } |
| |
| extern "C" size_t __sanitizer_get_current_allocated_bytes(); |
| extern "C" size_t __sanitizer_get_heap_size(); |
| |
| struct mallinfo scudo_mallinfo() { |
| struct mallinfo info {}; |
| info.uordblks = __sanitizer_get_current_allocated_bytes(); |
| info.hblkhd = __sanitizer_get_heap_size(); |
| info.usmblks = info.hblkhd; |
| return info; |
| } |
| |
| void* scudo_malloc(size_t byte_count) { |
| if (AllocTooBig(byte_count)) { |
| errno = ENOMEM; |
| return nullptr; |
| } |
| return malloc(byte_count); |
| } |
| |
| size_t scudo_malloc_usable_size(const void* ptr) { |
| return malloc_usable_size(ptr); |
| } |
| |
| void* scudo_memalign(size_t alignment, size_t byte_count) { |
| if (AllocTooBig(byte_count)) { |
| errno = ENOMEM; |
| return nullptr; |
| } |
| if (alignment != 0) { |
| if (!powerof2(alignment)) { |
| alignment = BIONIC_ROUND_UP_POWER_OF_2(alignment); |
| } |
| } else { |
| alignment = 1; |
| } |
| return memalign(alignment, byte_count); |
| } |
| |
| void* scudo_realloc(void* ptr, size_t byte_count) { |
| if (AllocTooBig(byte_count)) { |
| errno = ENOMEM; |
| return nullptr; |
| } |
| return realloc(ptr, byte_count); |
| } |
| |
| int scudo_posix_memalign(void** memptr, size_t alignment, size_t size) { |
| if (alignment < sizeof(void*) || !powerof2(alignment)) { |
| return EINVAL; |
| } |
| if (AllocTooBig(size)) { |
| return ENOMEM; |
| } |
| return posix_memalign(memptr, alignment, size); |
| } |
| |
| #if defined(HAVE_DEPRECATED_MALLOC_FUNCS) |
| extern "C" void* pvalloc(size_t); |
| |
| void* scudo_pvalloc(size_t size) { |
| if (AllocTooBig(size)) { |
| errno = ENOMEM; |
| return nullptr; |
| } |
| return pvalloc(size); |
| } |
| |
| extern "C" void* valloc(size_t); |
| |
| void* scudo_valloc(size_t size) { |
| if (AllocTooBig(size)) { |
| errno = ENOMEM; |
| return nullptr; |
| } |
| return valloc(size); |
| } |
| #endif |
| |
| // Do not try and name the scudo maps by overriding __sanitizer::internal_mmap. |
| // There is already a function called MmapNamed that names the maps. |
| // Unfortunately, there is no easy way to override MmapNamed because |
| // too much of the code is not compiled into functions available in the |
| // library, and the code is complicated. |