| //===-- dfsan.h -------------------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of DataFlowSanitizer. |
| // |
| // Private DFSan header. |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef DFSAN_H |
| #define DFSAN_H |
| |
| #include "sanitizer_common/sanitizer_internal_defs.h" |
| |
| #include "dfsan_platform.h" |
| |
| using __sanitizer::u32; |
| using __sanitizer::u8; |
| using __sanitizer::uptr; |
| |
| // Copy declarations from public sanitizer/dfsan_interface.h header here. |
| typedef u8 dfsan_label; |
| typedef u32 dfsan_origin; |
| |
| extern "C" { |
| void dfsan_add_label(dfsan_label label, void *addr, uptr size); |
| void dfsan_set_label(dfsan_label label, void *addr, uptr size); |
| dfsan_label dfsan_read_label(const void *addr, uptr size); |
| dfsan_label dfsan_union(dfsan_label l1, dfsan_label l2); |
| // Zero out [offset, offset+size) from __dfsan_arg_tls. |
| void dfsan_clear_arg_tls(uptr offset, uptr size); |
| // Zero out the TLS storage. |
| void dfsan_clear_thread_local_state(); |
| |
| // Set DFSan label and origin TLS of argument for a call. |
| // Note that offset may not correspond with argument number. |
| // Some arguments (aggregate/array) will use several offsets. |
| void dfsan_set_arg_tls(uptr offset, dfsan_label label); |
| void dfsan_set_arg_origin_tls(uptr offset, dfsan_origin o); |
| |
| // Return the origin associated with the first taint byte in the size bytes |
| // from the address addr. |
| dfsan_origin dfsan_read_origin_of_first_taint(const void *addr, uptr size); |
| |
| // Set the data within [addr, addr+size) with label and origin. |
| void dfsan_set_label_origin(dfsan_label label, dfsan_origin origin, void *addr, |
| uptr size); |
| |
| // Copy or move the origins of the len bytes from src to dst. |
| void dfsan_mem_origin_transfer(const void *dst, const void *src, uptr len); |
| |
| // Copy shadow bytes from src to dst. |
| // Note this preserves distinct taint labels at specific offsets. |
| void dfsan_mem_shadow_transfer(void *dst, const void *src, uptr len); |
| } // extern "C" |
| |
| template <typename T> |
| void dfsan_set_label(dfsan_label label, T &data) { |
| dfsan_set_label(label, (void *)&data, sizeof(T)); |
| } |
| |
| namespace __dfsan { |
| |
| extern bool dfsan_inited; |
| extern bool dfsan_init_is_running; |
| |
| void initialize_interceptors(); |
| |
| inline dfsan_label *shadow_for(void *ptr) { |
| return (dfsan_label *)MEM_TO_SHADOW(ptr); |
| } |
| |
| inline const dfsan_label *shadow_for(const void *ptr) { |
| return shadow_for(const_cast<void *>(ptr)); |
| } |
| |
| inline uptr unaligned_origin_for(uptr ptr) { return MEM_TO_ORIGIN(ptr); } |
| |
| inline dfsan_origin *origin_for(void *ptr) { |
| auto aligned_addr = unaligned_origin_for(reinterpret_cast<uptr>(ptr)) & |
| ~(sizeof(dfsan_origin) - 1); |
| return reinterpret_cast<dfsan_origin *>(aligned_addr); |
| } |
| |
| inline const dfsan_origin *origin_for(const void *ptr) { |
| return origin_for(const_cast<void *>(ptr)); |
| } |
| |
| void dfsan_copy_memory(void *dst, const void *src, uptr size); |
| |
| void dfsan_allocator_init(); |
| void dfsan_deallocate(void *ptr); |
| |
| void *dfsan_malloc(uptr size); |
| void *dfsan_calloc(uptr nmemb, uptr size); |
| void *dfsan_realloc(void *ptr, uptr size); |
| void *dfsan_reallocarray(void *ptr, uptr nmemb, uptr size); |
| void *dfsan_valloc(uptr size); |
| void *dfsan_pvalloc(uptr size); |
| void *dfsan_aligned_alloc(uptr alignment, uptr size); |
| void *dfsan_memalign(uptr alignment, uptr size); |
| int dfsan_posix_memalign(void **memptr, uptr alignment, uptr size); |
| |
| void dfsan_init(); |
| |
| } // namespace __dfsan |
| |
| #endif // DFSAN_H |