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| author | chefmax <chefmax@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-01-09 07:31:05 +0000 |
|---|---|---|
| committer | chefmax <chefmax@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-01-09 07:31:05 +0000 |
| commit | bf2b7c225c336e6e5acc38b731e62caa11e74976 (patch) | |
| tree | 58efd7774e722299ff68ff8583b43da062decab9 /gcc/asan.c | |
| parent | 964c78273df75a75884113f4bcbab851fa074e0e (diff) | |
| download | gcc-bf2b7c225c336e6e5acc38b731e62caa11e74976.tar.gz | |
2014-01-09 Max Ostapenko <m.ostapenko@partner.samsung.com>
* cfgexpand.c (expand_stack_vars): Optionally disable
asan stack protection.
(expand_used_vars): Likewise.
(partition_stack_vars): Likewise.
* asan.c (asan_emit_stack_protection): Optionally disable
after return stack usage.
(instrument_derefs): Optionally disable memory
access instrumentation.
(instrument_builtin_call): Likewise.
(instrument_strlen_call): Likewise.
(asan_protect_global): Optionally disable
global variables protection.
* doc/invoke.texi: Added doc for new options.
* params.def: Added new options.
* params.h: Likewise.
2014-01-09 Max Ostapenko <m.ostapenko@partner.samsung.com>
* c-c++-common/asan/no-asan-globals.c: New test.
* c-c++-common/asan/no-instrument-reads.c: Likewise.
* c-c++-common/asan/no-instrument-writes.c: Likewise.
* c-c++-common/asan/use-after-return-1.c: Likewise.
* c-c++-common/asan/no-use-after-return.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@206458 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/asan.c')
| -rw-r--r-- | gcc/asan.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/gcc/asan.c b/gcc/asan.c index e077153a969..53992a81b18 100644 --- a/gcc/asan.c +++ b/gcc/asan.c @@ -53,6 +53,7 @@ along with GCC; see the file COPYING3. If not see #include "gimple-builder.h" #include "ubsan.h" #include "predict.h" +#include "params.h" /* AddressSanitizer finds out-of-bounds and use-after-free bugs with <2x slowdown on average. @@ -1003,7 +1004,8 @@ asan_emit_stack_protection (rtx base, rtx pbase, unsigned int alignb, str_cst = asan_pp_string (&asan_pp); /* Emit the prologue sequence. */ - if (asan_frame_size > 32 && asan_frame_size <= 65536 && pbase) + if (asan_frame_size > 32 && asan_frame_size <= 65536 && pbase + && ASAN_USE_AFTER_RETURN) { use_after_return_class = floor_log2 (asan_frame_size - 1) - 5; /* __asan_stack_malloc_N guarantees alignment @@ -1239,6 +1241,9 @@ asan_needs_local_alias (tree decl) bool asan_protect_global (tree decl) { + if (!ASAN_GLOBALS) + return false; + rtx rtl, symbol; if (TREE_CODE (decl) == STRING_CST) @@ -1568,6 +1573,11 @@ static void instrument_derefs (gimple_stmt_iterator *iter, tree t, location_t location, bool is_store) { + if (is_store && !ASAN_INSTRUMENT_WRITES) + return; + if (!is_store && !ASAN_INSTRUMENT_READS) + return; + tree type, base; HOST_WIDE_INT size_in_bytes; @@ -1897,6 +1907,9 @@ instrument_strlen_call (gimple_stmt_iterator *iter) static bool instrument_builtin_call (gimple_stmt_iterator *iter) { + if (!ASAN_MEMINTRIN) + return false; + bool iter_advanced_p = false; gimple call = gsi_stmt (*iter); |