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| author | Maxim Ostapenko <m.ostapenko@samsung.com> | 2017-07-06 16:02:06 +0000 |
|---|---|---|
| committer | Maxim Ostapenko <chefmax@gcc.gnu.org> | 2017-07-06 19:02:06 +0300 |
| commit | e3174bdf35c172f69daf08350401aa177f8f1498 (patch) | |
| tree | e7632bf6f8c4e541f5dbf209ad90d807a7b79318 /gcc/cfgexpand.c | |
| parent | b6f4312871d39547c2e286b6eadac4408ab494ae (diff) | |
| download | gcc-e3174bdf35c172f69daf08350401aa177f8f1498.zip gcc-e3174bdf35c172f69daf08350401aa177f8f1498.tar.gz gcc-e3174bdf35c172f69daf08350401aa177f8f1498.tar.bz2 | |
ASAN: Implement dynamic allocas/VLAs sanitization.
gcc/
* asan.c: Include gimple-fold.h.
(get_last_alloca_addr): New function.
(handle_builtin_stackrestore): Likewise.
(handle_builtin_alloca): Likewise.
(asan_emit_allocas_unpoison): Likewise.
(get_mem_refs_of_builtin_call): Add new parameter, remove const
quallifier from first paramerer. Handle BUILT_IN_ALLOCA,
BUILT_IN_ALLOCA_WITH_ALIGN and BUILT_IN_STACK_RESTORE builtins.
(instrument_builtin_call): Pass gimple iterator to
get_mem_refs_of_builtin_call.
(last_alloca_addr): New global.
* asan.h (asan_emit_allocas_unpoison): Declare.
* builtins.c (expand_asan_emit_allocas_unpoison): New function.
(expand_builtin): Handle BUILT_IN_ASAN_ALLOCAS_UNPOISON.
* cfgexpand.c (expand_used_vars): Call asan_emit_allocas_unpoison
if function calls alloca.
* gimple-fold.c (replace_call_with_value): Remove static keyword.
* gimple-fold.h (replace_call_with_value): Declare.
* internal-fn.c: Include asan.h.
* sanitizer.def (BUILT_IN_ASAN_ALLOCA_POISON,
BUILT_IN_ASAN_ALLOCAS_UNPOISON): New builtins.
gcc/testsuite/
* c-c++-common/asan/alloca_big_alignment.c: New test.
* c-c++-common/asan/alloca_detect_custom_size.c: Likewise.
* c-c++-common/asan/alloca_instruments_all_paddings.c: Likewise.
* c-c++-common/asan/alloca_loop_unpoisoning.c: Likewise.
* c-c++-common/asan/alloca_overflow_partial.c: Likewise.
* c-c++-common/asan/alloca_overflow_right.c: Likewise.
* c-c++-common/asan/alloca_safe_access.c: Likewise.
* c-c++-common/asan/alloca_underflow_left.c: Likewise.
From-SVN: r250031
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index 3b5f2fe..dd7277f 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -2241,6 +2241,11 @@ expand_used_vars (void) expand_stack_vars (NULL, &data); } + if ((flag_sanitize & SANITIZE_ADDRESS) && cfun->calls_alloca) + var_end_seq = asan_emit_allocas_unpoison (virtual_stack_dynamic_rtx, + virtual_stack_vars_rtx, + var_end_seq); + fini_vars_expansion (); /* If there were any artificial non-ignored vars without rtl |