projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 37d6f666 | 1 | /* AddressSanitizer, a fast memory error detector. |
| d1e082c2 | 2 | Copyright (C) 2011-2013 Free Software Foundation, Inc. |
| 37d6f666 WM |
3 | Contributed by Kostya Serebryany <kcc@google.com> |
| 4 | ||
| 5 | This file is part of GCC. | |
| 6 | ||
| 7 | GCC is free software; you can redistribute it and/or modify it under | |
| 8 | the terms of the GNU General Public License as published by the Free | |
| 9 | Software Foundation; either version 3, or (at your option) any later | |
| 10 | version. | |
| 11 | ||
| 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 | for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU General Public License | |
| 18 | along with GCC; see the file COPYING3. If not see | |
| 19 | <http://www.gnu.org/licenses/>. */ | |
| 20 | ||
| 21 | #ifndef TREE_ASAN | |
| 22 | #define TREE_ASAN | |
| 23 | ||
| ef1b3fda | 24 | extern void asan_function_start (void); |
| f3ddd692 JJ |
25 | extern void asan_finish_file (void); |
| 26 | extern rtx asan_emit_stack_protection (rtx, HOST_WIDE_INT *, tree *, int); | |
| 8240018b | 27 | extern bool asan_protect_global (tree); |
| 0e668eaf | 28 | extern void initialize_sanitizer_builtins (void); |
| 59b36ecf | 29 | extern tree asan_dynamic_init_call (bool); |
| f3ddd692 JJ |
30 | |
| 31 | /* Alias set for accessing the shadow memory. */ | |
| 32 | extern alias_set_type asan_shadow_set; | |
| 37d6f666 | 33 | |
| dfe06d3e | 34 | /* Shadow memory is found at |
| f6d98484 | 35 | (address >> ASAN_SHADOW_SHIFT) + targetm.asan_shadow_offset (). */ |
| dfe06d3e JJ |
36 | #define ASAN_SHADOW_SHIFT 3 |
| 37 | ||
| f3ddd692 JJ |
38 | /* Red zone size, stack and global variables are padded by ASAN_RED_ZONE_SIZE |
| 39 | up to 2 * ASAN_RED_ZONE_SIZE - 1 bytes. */ | |
| 40 | #define ASAN_RED_ZONE_SIZE 32 | |
| 41 | ||
| 42 | /* Shadow memory values for stack protection. Left is below protected vars, | |
| 43 | the first pointer in stack corresponding to that offset contains | |
| 44 | ASAN_STACK_FRAME_MAGIC word, the second pointer to a string describing | |
| 45 | the frame. Middle is for padding in between variables, right is | |
| 46 | above the last protected variable and partial immediately after variables | |
| 47 | up to ASAN_RED_ZONE_SIZE alignment. */ | |
| 48 | #define ASAN_STACK_MAGIC_LEFT 0xf1 | |
| 49 | #define ASAN_STACK_MAGIC_MIDDLE 0xf2 | |
| 50 | #define ASAN_STACK_MAGIC_RIGHT 0xf3 | |
| 51 | #define ASAN_STACK_MAGIC_PARTIAL 0xf4 | |
| 52 | ||
| 53 | #define ASAN_STACK_FRAME_MAGIC 0x41b58ab3 | |
| 54 | ||
| 55 | /* Return true if DECL should be guarded on the stack. */ | |
| 56 | ||
| 57 | static inline bool | |
| 58 | asan_protect_stack_decl (tree decl) | |
| 59 | { | |
| 60 | return DECL_P (decl) && !DECL_ARTIFICIAL (decl); | |
| 61 | } | |
| 62 | ||
| 8240018b JJ |
63 | /* Return the size of padding needed to insert after a protected |
| 64 | decl of SIZE. */ | |
| 65 | ||
| 66 | static inline unsigned int | |
| 67 | asan_red_zone_size (unsigned int size) | |
| 68 | { | |
| 69 | unsigned int c = size & (ASAN_RED_ZONE_SIZE - 1); | |
| 70 | return c ? 2 * ASAN_RED_ZONE_SIZE - c : ASAN_RED_ZONE_SIZE; | |
| 71 | } | |
| 72 | ||
| 37d6f666 | 73 | #endif /* TREE_ASAN */ |