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72 lines
2.4 KiB
72 lines
2.4 KiB
7 months ago
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/**
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define MAX_ENTRIES (1024 * 1024)
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#define INITIAL_VAL (0xBE)
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#define MINIMUM_ALIGNMENT (16)
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#define DISABLE_MEM_ACCESS(mem, size)\
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mprotect((char *) mem, size, PROT_NONE);
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#define ENABLE_MEM_ACCESS(mem, size)\
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mprotect((char *) mem, size, PROT_READ | PROT_WRITE);
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#define ENABLE_NONE 0x00
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#define ENABLE_MEMALIGN_CHECK 0x01
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#define ENABLE_MALLOC_CHECK 0x02
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#define ENABLE_CALLOC_CHECK 0x04
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#define ENABLE_REALLOC_CHECK 0x08
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#define ENABLE_FREE_CHECK 0x10
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#define ENABLE_ALL ENABLE_MEMALIGN_CHECK | ENABLE_MALLOC_CHECK |\
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ENABLE_CALLOC_CHECK | ENABLE_REALLOC_CHECK | ENABLE_FREE_CHECK
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typedef struct _map_struct_t {
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void *start_ptr;
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void *mem_ptr;
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int num_pages;
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size_t mem_size;
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} map_struct_t;
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static void* (*real_memalign)(size_t, size_t) = NULL;
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#ifndef DISABLE_MALLOC_OVERLOADING
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static void* (*real_calloc)(size_t, size_t) = NULL;
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static void* (*real_malloc)(size_t) = NULL;
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static void* (*real_realloc)(void *ptr, size_t size) = NULL;
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#endif /* DISABLE_MALLOC_OVERLOADING */
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static void (*real_free)(void *) = NULL;
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static int s_memutils_initialized = 0;
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static int s_mem_map_index = 0;
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static struct sigaction new_sa, old_sa;
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#ifdef ENABLE_SELECTIVE_OVERLOADING
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extern char enable_selective_overload;
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#endif /* ENABLE_SELECTIVE_OVERLOADING */
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#ifdef CHECK_USE_AFTER_FREE_WITH_WINDOW_SIZE
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static int s_free_write_index = 0;
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static int s_free_read_index = 0;
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static int s_free_list_size = 0;
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map_struct_t s_free_list[MAX_ENTRIES];
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#endif /* CHECK_USE_AFTER_FREE_WITH_WINDOW_SIZE */
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map_struct_t s_mem_map[MAX_ENTRIES];
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#if (!(defined CHECK_OVERFLOW) && !(defined CHECK_UNDERFLOW))
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#error "CHECK MACROS NOT DEFINED"
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#endif
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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