From bf2b7c225c336e6e5acc38b731e62caa11e74976 Mon Sep 17 00:00:00 2001 From: chefmax Date: Thu, 9 Jan 2014 07:31:05 +0000 Subject: 2014-01-09 Max Ostapenko * 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 * 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 --- gcc/asan.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'gcc/asan.c') 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); -- cgit v1.2.1