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Diffstat (limited to 'gcc-4.8.3/gcc/asan.h')
| -rw-r--r-- | gcc-4.8.3/gcc/asan.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/asan.h b/gcc-4.8.3/gcc/asan.h new file mode 100644 index 000000000..62dbe9849 --- /dev/null +++ b/gcc-4.8.3/gcc/asan.h @@ -0,0 +1,71 @@ +/* AddressSanitizer, a fast memory error detector. + Copyright (C) 2011-2013 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_finish_file (void); +extern rtx asan_emit_stack_protection (rtx, HOST_WIDE_INT *, tree *, int); +extern bool asan_protect_global (tree); +extern void initialize_sanitizer_builtins (void); + +/* Alias set for accessing the shadow memory. */ +extern alias_set_type asan_shadow_set; + +/* Shadow memory is found at + (address >> ASAN_SHADOW_SHIFT) + targetm.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_FRAME_MAGIC 0x41b58ab3 + +/* 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; +} + +#endif /* TREE_ASAN */ |