diff options
Diffstat (limited to 'gcc/asan.h')
| -rw-r--r-- | gcc/asan.h | 66 |
1 files changed, 55 insertions, 11 deletions
diff --git a/gcc/asan.h b/gcc/asan.h index 7ec693f2b3c..042af1ff799 100644 --- a/gcc/asan.h +++ b/gcc/asan.h @@ -29,6 +29,7 @@ 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 bool asan_expand_mark_ifn (gimple_stmt_iterator *); extern gimple_stmt_iterator create_cond_insert_point (gimple_stmt_iterator *, bool, bool, bool, basic_block *, basic_block *); @@ -36,9 +37,14 @@ extern gimple_stmt_iterator create_cond_insert_point /* Alias set for accessing the shadow memory. */ extern alias_set_type asan_shadow_set; +/* Hash set of labels that are either used in a goto, or their address + has been taken. */ +extern hash_set <tree> *asan_used_labels; + /* Shadow memory is found at (address >> ASAN_SHADOW_SHIFT) + asan_shadow_offset (). */ #define ASAN_SHADOW_SHIFT 3 +#define ASAN_SHADOW_GRANULARITY (1UL << ASAN_SHADOW_SHIFT) /* Red zone size, stack and global variables are padded by ASAN_RED_ZONE_SIZE up to 2 * ASAN_RED_ZONE_SIZE - 1 bytes. */ @@ -50,22 +56,32 @@ extern alias_set_type asan_shadow_set; 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_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_MAGIC_USE_AFTER_SCOPE 0xf8 #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) +/* Various flags for Asan builtins. */ +enum asan_check_flags { - return DECL_P (decl) && !DECL_ARTIFICIAL (decl); -} + ASAN_CHECK_STORE = 1 << 0, + ASAN_CHECK_SCALAR_ACCESS = 1 << 1, + ASAN_CHECK_NON_ZERO_LEN = 1 << 2, + ASAN_CHECK_LAST = 1 << 3 +}; + +/* Flags for Asan check builtins. */ +enum asan_mark_flags +{ + ASAN_MARK_CLOBBER = 1 << 0, + ASAN_MARK_UNCLOBBER = 1 << 1, + ASAN_MARK_LAST = 1 << 2 +}; /* Return the size of padding needed to insert after a protected decl of SIZE. */ @@ -81,6 +97,8 @@ extern bool set_asan_shadow_offset (const char *); extern void set_sanitized_sections (const char *); +extern bool asan_sanitize_stack_p (void); + /* Return TRUE if builtin with given FCODE will be intercepted by libasan. */ @@ -105,4 +123,30 @@ asan_intercepted_p (enum built_in_function fcode) || fcode == BUILT_IN_STRNCMP || fcode == BUILT_IN_STRNCPY; } + +/* Return TRUE if we should instrument for use-after-scope sanity checking. */ + +static inline bool +asan_sanitize_use_after_scope (void) +{ + return (flag_sanitize_address_use_after_scope && asan_sanitize_stack_p ()); +} + +static inline bool +asan_no_sanitize_address_p (void) +{ + return lookup_attribute ("no_sanitize_address", + DECL_ATTRIBUTES (current_function_decl)); +} + +/* 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) + || (asan_sanitize_use_after_scope () && TREE_ADDRESSABLE (decl))); +} + #endif /* TREE_ASAN */ |