diff options
| author | Martin Liska <mliska@suse.cz> | 2016-11-07 11:23:38 +0100 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2016-11-07 10:23:38 +0000 |
| commit | 6dc4a6045089adc9ec9efbbc07db25c4a21fc0ff (patch) | |
| tree | 8994878a3b2edbefb1b3d57b17318ab3eeb0db8f /gcc/params.def | |
| parent | 2447ab8593cace422936ef8ecbe67d32fe0f83ca (diff) | |
| download | gcc-6dc4a6045089adc9ec9efbbc07db25c4a21fc0ff.zip gcc-6dc4a6045089adc9ec9efbbc07db25c4a21fc0ff.tar.gz gcc-6dc4a6045089adc9ec9efbbc07db25c4a21fc0ff.tar.bz2 | |
Introduce -fsanitize-address-use-after-scope
* c-warn.c (warn_for_unused_label): Save all labels used
in goto or in &label.
* asan.c (enum asan_check_flags): Move the enum to header file.
(asan_init_shadow_ptr_types): Make type creation more generic.
(shadow_mem_size): New function.
(asan_emit_stack_protection): Use newly added ASAN_SHADOW_GRANULARITY.
Rewritten stack unpoisoning code.
(build_shadow_mem_access): Add new argument return_address.
(instrument_derefs): Instrument local variables if use after scope
sanitization is enabled.
(asan_store_shadow_bytes): New function.
(asan_expand_mark_ifn): Likewise.
(asan_sanitize_stack_p): Moved from asan_sanitize_stack_p.
* asan.h (enum asan_mark_flags): Moved here from asan.c
(asan_protect_stack_decl): Protect all declaration that need
to live in memory.
(asan_sanitize_use_after_scope): New function.
(asan_no_sanitize_address_p): Likewise.
* cfgexpand.c (partition_stack_vars): Consider
asan_sanitize_use_after_scope in condition.
(expand_stack_vars): Likewise.
* common.opt (-fsanitize-address-use-after-scope): New option.
* doc/invoke.texi (use-after-scope-direct-emission-threshold):
Explain the parameter.
* flag-types.h (enum sanitize_code): Define SANITIZE_USE_AFTER_SCOPE.
* gimplify.c (build_asan_poison_call_expr): New function.
(asan_poison_variable): Likewise.
(gimplify_bind_expr): Generate poisoning/unpoisoning for local
variables that have address taken.
(gimplify_decl_expr): Likewise.
(gimplify_target_expr): Likewise for C++ temporaries.
(sort_by_decl_uid): New function.
(gimplify_expr): Unpoison all variables for a label we can jump
from outside of a scope.
(gimplify_switch_expr): Unpoison variables defined in the switch
context.
(gimplify_function_tree): Clear asan_poisoned_variables.
(asan_poison_variables): New function.
(warn_switch_unreachable_r): Handle IFN_ASAN_MARK.
* internal-fn.c (expand_ASAN_MARK): New function.
* internal-fn.def (ASAN_MARK): Declare.
* opts.c (finish_options): Handle -fstack-reuse if
-fsanitize-address-use-after-scope is enabled.
(common_handle_option): Enable address sanitization if
-fsanitize-address-use-after-scope is enabled.
* params.def (PARAM_USE_AFTER_SCOPE_DIRECT_EMISSION_THRESHOLD):
New parameter.
* params.h: Likewise.
* sancov.c (pass_sanopt::execute): Handle IFN_ASAN_MARK.
* sanitizer.def: Define __asan_poison_stack_memory and
__asan_unpoison_stack_memory functions.
* asan.c (asan_mark_poison_p): New function.
(transform_statements): Handle asan_mark_poison_p calls.
* gimple.c (nonfreeing_call_p): Handle IFN_ASAN_MARK.
From-SVN: r241896
Diffstat (limited to 'gcc/params.def')
| -rw-r--r-- | gcc/params.def | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/params.def b/gcc/params.def index ab3eb3d..89f7093 100644 --- a/gcc/params.def +++ b/gcc/params.def @@ -1168,6 +1168,12 @@ DEFPARAM (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD, "in function becomes greater or equal to this number.", 7000, 0, INT_MAX) +DEFPARAM (PARAM_USE_AFTER_SCOPE_DIRECT_EMISSION_THRESHOLD, + "use-after-scope-direct-emission-threshold", + "Use direct poisoning/unpoisoning intructions for variables " + "smaller or equal to this number.", + 256, 0, INT_MAX) + DEFPARAM (PARAM_UNINIT_CONTROL_DEP_ATTEMPTS, "uninit-control-dep-attempts", "Maximum number of nested calls to search for control dependencies " |