| /* AddressSanitizer, a fast memory error detector. |
| Copyright (C) 2011-2015 Free Software Foundation, Inc. |
| Contributed by Kostya Serebryany <kcc@google.com> |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef TREE_ASAN |
| #define TREE_ASAN |
| |
| extern void asan_function_start (void); |
| extern void asan_finish_file (void); |
| extern rtx_insn *asan_emit_stack_protection (rtx, rtx, unsigned int, |
| HOST_WIDE_INT *, tree *, int); |
| extern bool asan_protect_global (tree); |
| extern void initialize_sanitizer_builtins (void); |
| extern tree asan_dynamic_init_call (bool); |
| extern bool asan_expand_check_ifn (gimple_stmt_iterator *, bool); |
| |
| extern gimple_stmt_iterator create_cond_insert_point |
| (gimple_stmt_iterator *, bool, bool, bool, basic_block *, basic_block *); |
| |
| /* Alias set for accessing the shadow memory. */ |
| extern alias_set_type asan_shadow_set; |
| |
| /* Shadow memory is found at |
| (address >> ASAN_SHADOW_SHIFT) + asan_shadow_offset (). */ |
| #define ASAN_SHADOW_SHIFT 3 |
| |
| /* Red zone size, stack and global variables are padded by ASAN_RED_ZONE_SIZE |
| up to 2 * ASAN_RED_ZONE_SIZE - 1 bytes. */ |
| #define ASAN_RED_ZONE_SIZE 32 |
| |
| /* Shadow memory values for stack protection. Left is below protected vars, |
| the first pointer in stack corresponding to that offset contains |
| ASAN_STACK_FRAME_MAGIC word, the second pointer to a string describing |
| the frame. Middle is for padding in between variables, right is |
| above the last protected variable and partial immediately after variables |
| up to ASAN_RED_ZONE_SIZE alignment. */ |
| #define ASAN_STACK_MAGIC_LEFT 0xf1 |
| #define ASAN_STACK_MAGIC_MIDDLE 0xf2 |
| #define ASAN_STACK_MAGIC_RIGHT 0xf3 |
| #define ASAN_STACK_MAGIC_PARTIAL 0xf4 |
| #define ASAN_STACK_MAGIC_USE_AFTER_RET 0xf5 |
| |
| #define ASAN_STACK_FRAME_MAGIC 0x41b58ab3 |
| #define ASAN_STACK_RETIRED_MAGIC 0x45e0360e |
| |
| /* Return true if DECL should be guarded on the stack. */ |
| |
| static inline bool |
| asan_protect_stack_decl (tree decl) |
| { |
| return DECL_P (decl) && !DECL_ARTIFICIAL (decl); |
| } |
| |
| /* Return the size of padding needed to insert after a protected |
| decl of SIZE. */ |
| |
| static inline unsigned int |
| asan_red_zone_size (unsigned int size) |
| { |
| unsigned int c = size & (ASAN_RED_ZONE_SIZE - 1); |
| return c ? 2 * ASAN_RED_ZONE_SIZE - c : ASAN_RED_ZONE_SIZE; |
| } |
| |
| extern bool set_asan_shadow_offset (const char *); |
| |
| /* Return TRUE if builtin with given FCODE will be intercepted by |
| libasan. */ |
| |
| static inline bool |
| asan_intercepted_p (enum built_in_function fcode) |
| { |
| return fcode == BUILT_IN_INDEX |
| || fcode == BUILT_IN_MEMCHR |
| || fcode == BUILT_IN_MEMCMP |
| || fcode == BUILT_IN_MEMCPY |
| || fcode == BUILT_IN_MEMMOVE |
| || fcode == BUILT_IN_MEMSET |
| || fcode == BUILT_IN_STRCASECMP |
| || fcode == BUILT_IN_STRCAT |
| || fcode == BUILT_IN_STRCHR |
| || fcode == BUILT_IN_STRCMP |
| || fcode == BUILT_IN_STRCPY |
| || fcode == BUILT_IN_STRDUP |
| || fcode == BUILT_IN_STRLEN |
| || fcode == BUILT_IN_STRNCASECMP |
| || fcode == BUILT_IN_STRNCAT |
| || fcode == BUILT_IN_STRNCMP |
| || fcode == BUILT_IN_STRNCPY; |
| } |
| #endif /* TREE_ASAN */ |
