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use-after-scope fallout 

PR testsuite/78242
	* g++.dg/asan/use-after-scope-4.C: New test.
	* g++.dg/asan/use-after-scope-types-4.C: Update scanned pattern.
	* gcc.dg/asan/use-after-scope-8.c: Remove.
	PR testsuite/78242
	* dbgcnt.def: Add new debug counter asan_use_after_scope.
	* gimplify.c (gimplify_decl_expr): Do not sanitize vars
	with a value expr.  Do not add artificial variables to
	live_switch_vars.  Use the debug counter.
	(gimplify_target_expr): Use the debug counter.
	* internal-fn.def: Remove ECF_TM_PURE from ASAN_MARK builtin.
	* sanitizer.def: Set ATTR_NOTHROW_LEAF_LIST to
	BUILT_IN_ASAN_CLOBBER_N and BUILT_IN_ASAN_UNCLOBBER_N.

From-SVN: r241961
This commit is contained in:
Martin Liska 2016-11-08 13:28:33 +01:00 committed by Martin Liska
parent f9ef2c765a
commit fcd1b8dffc
9 changed files with 67 additions and 21 deletions
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12
gcc/ChangeLog
View File

@ -1,3 +1,15 @@
2016-11-08 Martin Liska <mliska@suse.cz>
PR testsuite/78242
* dbgcnt.def: Add new debug counter asan_use_after_scope.
* gimplify.c (gimplify_decl_expr): Do not sanitize vars
with a value expr. Do not add artificial variables to
live_switch_vars. Use the debug counter.
(gimplify_target_expr): Use the debug counter.
* internal-fn.def: Remove ECF_TM_PURE from ASAN_MARK builtin.
* sanitizer.def: Set ATTR_NOTHROW_LEAF_LIST to
BUILT_IN_ASAN_CLOBBER_N and BUILT_IN_ASAN_UNCLOBBER_N.
2016-11-08 Richard Biener <rguenther@suse.de>
* tree-vect-stmts.c (get_group_load_store_type): If the

1
gcc/dbgcnt.def
View File

@ -141,6 +141,7 @@ echo ubound: $ub
*/
/* Debug counter definitions. */
DEBUG_COUNTER (asan_use_after_scope)
DEBUG_COUNTER (auto_inc_dec)
DEBUG_COUNTER (ccp)
DEBUG_COUNTER (cfg_cleanup)

10
gcc/gimplify.c
View File

@ -60,6 +60,7 @@ along with GCC; see the file COPYING3. If not see
#include "langhooks-def.h" /* FIXME: for lhd_set_decl_assembler_name */
#include "builtins.h"
#include "asan.h"
#include "dbgcnt.h"
/* Hash set of poisoned variables in a bind expr. */
static hash_set<tree> *asan_poisoned_variables = NULL;
@ -1622,11 +1623,13 @@ gimplify_decl_expr (tree *stmt_p, gimple_seq *seq_p)
&& !asan_no_sanitize_address_p ()
&& !is_vla
&& TREE_ADDRESSABLE (decl)
&& !TREE_STATIC (decl))
&& !TREE_STATIC (decl)
&& !DECL_HAS_VALUE_EXPR_P (decl)
&& dbg_cnt (asan_use_after_scope))
{
asan_poisoned_variables->add (decl);
asan_poison_variable (decl, false, seq_p);
if (gimplify_ctxp->live_switch_vars)
if (!DECL_ARTIFICIAL (decl) && gimplify_ctxp->live_switch_vars)
gimplify_ctxp->live_switch_vars->add (decl);
}
@ -6399,7 +6402,8 @@ gimplify_target_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
else
cleanup = clobber;
}
if (asan_sanitize_use_after_scope ())
if (asan_sanitize_use_after_scope ()
&& dbg_cnt (asan_use_after_scope))
{
tree asan_cleanup = build_asan_poison_call_expr (temp);
if (asan_cleanup)

2
gcc/internal-fn.def
View File

@ -158,7 +158,7 @@ DEF_INTERNAL_FN (UBSAN_OBJECT_SIZE, ECF_LEAF | ECF_NOTHROW, NULL)
DEF_INTERNAL_FN (ABNORMAL_DISPATCHER, ECF_NORETURN, NULL)
DEF_INTERNAL_FN (BUILTIN_EXPECT, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
DEF_INTERNAL_FN (ASAN_CHECK, ECF_TM_PURE | ECF_LEAF | ECF_NOTHROW, ".R...")
DEF_INTERNAL_FN (ASAN_MARK, ECF_TM_PURE | ECF_LEAF | ECF_NOTHROW, ".R..")
DEF_INTERNAL_FN (ASAN_MARK, ECF_LEAF | ECF_NOTHROW, ".R..")
DEF_INTERNAL_FN (ADD_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
DEF_INTERNAL_FN (SUB_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
DEF_INTERNAL_FN (MUL_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)

4
gcc/sanitizer.def
View File

@ -166,9 +166,9 @@ DEF_SANITIZER_BUILTIN(BUILT_IN_ASAN_AFTER_DYNAMIC_INIT,
"__asan_after_dynamic_init",
BT_FN_VOID, ATTR_NOTHROW_LEAF_LIST)
DEF_SANITIZER_BUILTIN(BUILT_IN_ASAN_CLOBBER_N, "__asan_poison_stack_memory",
BT_FN_VOID_PTR_PTRMODE, 0)
BT_FN_VOID_PTR_PTRMODE, ATTR_NOTHROW_LEAF_LIST)
DEF_SANITIZER_BUILTIN(BUILT_IN_ASAN_UNCLOBBER_N, "__asan_unpoison_stack_memory",
BT_FN_VOID_PTR_PTRMODE, 0)
BT_FN_VOID_PTR_PTRMODE, ATTR_NOTHROW_LEAF_LIST)
/* Thread Sanitizer */
DEF_SANITIZER_BUILTIN(BUILT_IN_TSAN_INIT, "__tsan_init",

7
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2016-11-08 Martin Liska <mliska@suse.cz>
PR testsuite/78242
* g++.dg/asan/use-after-scope-4.C: New test.
* g++.dg/asan/use-after-scope-types-4.C: Update scanned pattern.
* gcc.dg/asan/use-after-scope-8.c: Remove.
2016-11-08 Richard Biener <rguenther@suse.de>
* gcc.dg/vect/vect-nb-iter-ub-2.c: Adjust.

36
gcc/testsuite/g++.dg/asan/use-after-scope-4.C Normal file
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@ -0,0 +1,36 @@
/* Caused ICE in in make_decl_rtl, at varasm.c:1311. */
/* { dg-do compile } */
class A
{
public:
A () : value (123) {}
int value;
};
template <typename StoredFunction> class B
{
public:
template <typename F> B (F p1) : mFunction (p1) { mFunction (); }
StoredFunction mFunction;
};
template <typename Function>
void
NS_NewRunnableFunction (Function p1)
{
(B<Function> (p1));
}
class C
{
void DispatchConnectionCloseEvent (A);
void AsyncCloseConnectionWithErrorMsg (const A &);
};
void
C::AsyncCloseConnectionWithErrorMsg (const A &)
{
{
A message;
NS_NewRunnableFunction (
[this, message] { DispatchConnectionCloseEvent (message); });
}
}

2
gcc/testsuite/g++.dg/asan/use-after-scope-types-4.C
View File

@ -13,5 +13,5 @@ int main()
}
// { dg-output "ERROR: AddressSanitizer: stack-use-after-scope on address.*(\n|\r\n|\r)" }
// { dg-output "READ of size 8 at" }
// { dg-output "READ of size " }
// { dg-output ".*'x' <== Memory access at offset \[0-9\]* is inside this variable.*" }

14
gcc/testsuite/gcc.dg/asan/use-after-scope-8.c
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@ -1,14 +0,0 @@
// { dg-do compile }
// { dg-additional-options "-fdump-tree-asan0" }
/* { dg-skip-if "" { *-*-* } { "*" } { "-O0" } } */
int
fn1 ()
{
int x = 123;
register int a asm("rdi") = 123;
return x * x;
}
/* { dg-final { scan-tree-dump-not "ASAN_CHECK" "asan0" } } */