[RFC] Implement Undefined Behavior Sanitizer
Marek Polacek
polacek@redhat.com
Wed Jun 5 17:57:00 GMT 2013
Hi!
This is an attempt to add the Undefined Behavior Sanitizer to GCC.
Note that it's very alpha version; so far it doesn't do that much,
at the moment it should handle division by zero cases, INT_MIN / -1,
and various shift cases (shifting by a negative value, shifting when
second operand is >= than TYPE_PRECISION (first_operand) and suchlike.
(On integer types, so far.)
It works by creating a COMPOUND_EXPR around original expression, so e.g.
it creates:
if (b < 0 || (b > 31 || a < 0))
{
__builtin___ubsan_handle_shift_out_of_bounds ();
}
else
{
0
}, a << b;
from original "a <<= b;".
There is of course a lot of stuff that needs to be done, more
specifically:
0) fix an ICE which I've noticed right now ;(
long a = 1;
int b = 3;
a <<= b;
(error: mismatching comparison operand types)
temporarily solved by surrounding "doing_shift = true;"
with if (comptypes (type0, type1))
But that needs a better solution I'm afraid. Bah.
1) import & build the ubsan library from LLVM
I've already spent some time on this, but failed miserably. I've thought
that importing ubsan/ from LLVM into libsanitizer/, adding
libsanitizer/ubsan/Makefile.{am,in}, editing libsanitizer/Makefile.am
and libsanitizer/configure.ac, then something like aclocal && automake
could be sufficient, but no. I'd very much appreciate any help with
this; is someone willing to help me with this one? And it seemed so easy...
2) construct arguments for ubsan library
I guess that if we want to call for instance
void __ubsan::__ubsan_handle_shift_out_of_bounds(ShiftOutOfBoundsData *Data,
ValueHandle LHS, ValueHandle RHS)
from GCC, we need to construct arguments compatible with
ShiftOutOfBoundsData/ValueHandle.
So, perhaps we need some helper function that constructs the CALL_EXPR
for the builtin; so far I haven't spent much time on this and don't know
what exactly to do here. Time to look at what asan/tsan do.
3) add parsing of -fsanitize=<...>
LLVM supports e.g. -fsanitize=shift,divbyzero combination, we should too.
This doesn't sound like a big deal; just parse the arguments and set
various flags, or error out on invalid combinations.
4) and of course, more instrumentation (C/C++ FE, gimple level)
What comes to mind is:
- float/double to integer conversions,
- integer overflows (a long list of various cases here),
- invalid conversions of int to bool,
- reaching a __builtin_unreachable() call,
- VLAs size (e.g. negative size),
- store to/load of misaligned address,
- store to/load of null pointer,
- etc.
For the time being, I plan to work on overflows instrumentation.
Regtested/bootstrapped on x86_64-linux.
Comments, please?
2013-06-05 Marek Polacek <polacek@redhat.com>
* Makefile.in: Add ubsan.c
* common.opt: Add -fsanitize=undefined option.
* doc/invoke.texi: Document the new flag.
* ubsan.h: New file.
* ubsan.c): New file.
* sanitizer.def (DEF_SANITIZER_BUILTIN):
* builtins.def: Define BUILT_IN_UBSAN_HANDLE_DIVREM_OVERFLOW and
BUILT_IN_UBSAN_HANDLE_SHIFT_OUT_OF_BOUNDS.
* cp/typeck.c (cp_build_binary_op): Add division by zero and shift
instrumentation.
* c/c-typeck.c (build_binary_op): Likewise.
* builtin-attrs.def: Define ATTR_COLD.
* asan.c (initialize_sanitizer_builtins): Build
BT_FN_VOID_PTR_PTR_PTR.
--- gcc/sanitizer.def.mp 2013-06-05 18:23:41.077439836 +0200
+++ gcc/sanitizer.def 2013-06-05 18:26:04.749921181 +0200
@@ -283,3 +283,13 @@ DEF_SANITIZER_BUILTIN(BUILT_IN_TSAN_ATOM
DEF_SANITIZER_BUILTIN(BUILT_IN_TSAN_ATOMIC_SIGNAL_FENCE,
"__tsan_atomic_signal_fence",
BT_FN_VOID_INT, ATTR_NOTHROW_LEAF_LIST)
+
+/* Undefined Behavior Sanitizer */
+DEF_SANITIZER_BUILTIN(BUILT_IN_UBSAN_HANDLE_DIVREM_OVERFLOW,
+ "__ubsan_handle_divrem_overflow",
+ BT_FN_VOID_PTR_PTR_PTR,
+ ATTR_COLD_NORETURN_NOTHROW_LEAF_LIST)
+DEF_SANITIZER_BUILTIN(BUILT_IN_UBSAN_HANDLE_SHIFT_OUT_OF_BOUNDS,
+ "__ubsan_handle_shift_out_of_bounds",
+ BT_FN_VOID_PTR_PTR_PTR,
+ ATTR_COLD_NORETURN_NOTHROW_LEAF_LIST)
--- gcc/builtins.def.mp 2013-06-05 18:23:41.072439816 +0200
+++ gcc/builtins.def 2013-06-05 18:26:04.728921097 +0200
@@ -155,7 +155,7 @@ along with GCC; see the file COPYING3.
#define DEF_SANITIZER_BUILTIN(ENUM, NAME, TYPE, ATTRS) \
DEF_BUILTIN (ENUM, "__builtin_" NAME, BUILT_IN_NORMAL, TYPE, TYPE, \
true, true, true, ATTRS, true, \
- (flag_asan || flag_tsan))
+ (flag_asan || flag_tsan || flag_ubsan))
#undef DEF_CILKPLUS_BUILTIN
#define DEF_CILKPLUS_BUILTIN(ENUM, NAME, TYPE, ATTRS) \
--- gcc/Makefile.in.mp 2013-06-05 18:23:25.807388466 +0200
+++ gcc/Makefile.in 2013-06-05 18:26:04.723921077 +0200
@@ -1377,6 +1377,7 @@ OBJS = \
tree-affine.o \
asan.o \
tsan.o \
+ ubsan.o \
tree-call-cdce.o \
tree-cfg.o \
tree-cfgcleanup.o \
@@ -2259,6 +2260,10 @@ tsan.o : $(CONFIG_H) $(SYSTEM_H) $(TREE_
$(TM_P_H) $(TREE_FLOW_H) $(DIAGNOSTIC_CORE_H) $(GIMPLE_H) tree-iterator.h \
intl.h cfghooks.h output.h options.h c-family/c-common.h tsan.h asan.h \
tree-ssa-propagate.h
+ubsan.o : ubsan.c $(CONFIG_H) $(SYSTEM_H) $(GIMPLE_H) \
+ output.h coretypes.h $(GIMPLE_PRETTY_PRINT_H) $(CFGLOOP_H) \
+ tree-iterator.h $(TREE_FLOW_H) $(TREE_PASS_H) \
+ $(TARGET_H) $(EXPR_H) $(OPTABS_H) $(TM_P_H) langhooks.h
tree-ssa-tail-merge.o: tree-ssa-tail-merge.c \
$(SYSTEM_H) $(CONFIG_H) coretypes.h $(TM_H) $(BITMAP_H) \
$(FLAGS_H) $(TM_P_H) $(BASIC_BLOCK_H) $(CFGLOOP_H) \
--- gcc/doc/invoke.texi.mp 2013-06-05 18:29:18.301611796 +0200
+++ gcc/doc/invoke.texi 2013-06-05 18:33:53.756623280 +0200
@@ -5143,6 +5143,11 @@ Memory access instructions will be instr
data race bugs.
See @uref{http://code.google.com/p/data-race-test/wiki/ThreadSanitizer} for more details.
+@item -fsanitize=undefined
+Enable UndefinedBehaviorSanitizer, a fast undefined behavior detector
+Various computations will be instrumented to detect
+undefined behavior, e.g. division by zero or various overflows.
+
@item -fdump-final-insns@r{[}=@var{file}@r{]}
@opindex fdump-final-insns
Dump the final internal representation (RTL) to @var{file}. If the
--- gcc/ubsan.h.mp 2013-06-05 18:23:55.083486235 +0200
+++ gcc/ubsan.h 2013-06-05 18:10:21.284693807 +0200
@@ -0,0 +1,27 @@
+/* UndefinedBehaviorSanitizer, undefined behavior detector.
+ Copyright (C) 2013 Free Software Foundation, Inc.
+ Contributed by Marek Polacek <polacek@redhat.com>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef GCC_UBSAN_H
+#define GCC_UBSAN_H
+
+extern tree ubsan_instrument_division (location_t, enum tree_code, tree, tree);
+extern tree ubsan_instrument_shift (location_t, enum tree_code, tree, tree);
+
+#endif /* GCC_UBSAN_H */
--- gcc/ubsan.c.mp 2013-06-05 18:23:49.411467508 +0200
+++ gcc/ubsan.c 2013-06-05 18:00:25.000000000 +0200
@@ -0,0 +1,107 @@
+/* UndefinedBehaviorSanitizer, undefined behavior detector.
+ Copyright (C) 2013 Free Software Foundation, Inc.
+ Contributed by Marek Polacek <polacek@redhat.com>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tree.h"
+#include "c-family/c-common.h"
+
+/* Instrument division by zero and INT_MIN / -1. */
+
+tree
+ubsan_instrument_division (location_t loc, enum tree_code code,
+ tree op0, tree op1)
+{
+ tree t, tt;
+ tree orig = build2 (code, TREE_TYPE (op0), op0, op1);
+
+ if (TREE_CODE (TREE_TYPE (op0)) != INTEGER_TYPE
+ || TREE_CODE (TREE_TYPE (op1)) != INTEGER_TYPE)
+ return orig;
+
+ /* If we *know* that the divisor is not -1 or 0, we don't have to
+ instrument this expression.
+ ??? We could use decl_constant_value to cover up more cases. */
+ if (TREE_CODE (op1) == INTEGER_CST
+ && integer_nonzerop (op1)
+ && !integer_minus_onep (op1))
+ return orig;
+
+ tt = fold_build2 (EQ_EXPR, boolean_type_node, op1,
+ integer_minus_one_node);
+ t = fold_build2 (EQ_EXPR, boolean_type_node, op0,
+ TYPE_MIN_VALUE (TREE_TYPE (op0)));
+ t = fold_build2 (TRUTH_AND_EXPR, boolean_type_node, t, tt);
+ tt = build2 (EQ_EXPR, boolean_type_node,
+ op1, integer_zero_node);
+ t = fold_build2 (TRUTH_OR_EXPR, boolean_type_node, tt, t);
+ tt = builtin_decl_explicit (BUILT_IN_UBSAN_HANDLE_DIVREM_OVERFLOW);
+ // XXX Do we want _loc version here?
+ tt = build_call_expr_loc (loc, tt, 0);
+ t = fold_build3 (COND_EXPR, void_type_node, t, tt, void_zero_node);
+ t = fold_build2 (COMPOUND_EXPR, TREE_TYPE (orig), t, orig);
+
+ return t;
+}
+
+/* Instrument left and right shifts. */
+
+tree
+ubsan_instrument_shift (location_t loc, enum tree_code code,
+ tree op0, tree op1)
+{
+ tree t, tt;
+ tree orig = build2 (code, TREE_TYPE (op0), op0, op1);
+ tree prec = build_int_cst (TREE_TYPE (op0),
+ TYPE_PRECISION (TREE_TYPE (op0)));
+
+ t = fold_build2 (LT_EXPR, boolean_type_node, op1, integer_zero_node);
+ tt = fold_build2 (GE_EXPR, boolean_type_node, op1, prec);
+
+ /* int a = 1;
+ a <<= 31;
+ is undefined in C99/C11. */
+ if (code == LSHIFT_EXPR
+ && !TYPE_UNSIGNED (TREE_TYPE (op0))
+ && (flag_isoc99 || flag_isoc11))
+ {
+ tree prec1 = build_int_cst (TREE_TYPE (op1),
+ TYPE_PRECISION (TREE_TYPE (op1)) - 1);
+ tree x = fold_build2 (EQ_EXPR, boolean_type_node, op1, prec1);
+ tt = fold_build2 (TRUTH_OR_EXPR, boolean_type_node, tt, x);
+ }
+
+ /* For left shift, shifting a negative value is undefined. */
+ if (code == LSHIFT_EXPR)
+ {
+ tree x = fold_build2 (LT_EXPR, boolean_type_node, op0,
+ integer_zero_node);
+ tt = fold_build2 (TRUTH_OR_EXPR, boolean_type_node, tt, x);
+ }
+
+ t = fold_build2 (TRUTH_OR_EXPR, boolean_type_node, t, tt);
+ tt = builtin_decl_explicit (BUILT_IN_UBSAN_HANDLE_SHIFT_OUT_OF_BOUNDS);
+ tt = build_call_expr_loc (loc, tt, 0);
+ t = fold_build3 (COND_EXPR, void_type_node, t, tt, void_zero_node);
+ t = fold_build2 (COMPOUND_EXPR, TREE_TYPE (orig), t, orig);
+
+ return t;
+}
--- gcc/cp/typeck.c.mp 2013-06-05 18:23:41.076439832 +0200
+++ gcc/cp/typeck.c 2013-06-05 18:26:04.746921169 +0200
@@ -35,6 +35,7 @@ along with GCC; see the file COPYING3.
#include "intl.h"
#include "target.h"
#include "convert.h"
+#include "ubsan.h"
#include "c-family/c-common.h"
#include "c-family/c-objc.h"
#include "params.h"
@@ -3891,6 +3892,12 @@ cp_build_binary_op (location_t location,
op0 = orig_op0;
op1 = orig_op1;
+ /* Remember whether we're doing / or %. */
+ bool doing_div_or_mod = false;
+
+ /* Remember whether we're doing << or >>. */
+ bool doing_shift = false;
+
if (code == TRUTH_AND_EXPR || code == TRUTH_ANDIF_EXPR
|| code == TRUTH_OR_EXPR || code == TRUTH_ORIF_EXPR
|| code == TRUTH_XOR_EXPR)
@@ -4070,8 +4077,15 @@ cp_build_binary_op (location_t location,
{
enum tree_code tcode0 = code0, tcode1 = code1;
tree cop1 = fold_non_dependent_expr_sfinae (op1, tf_none);
+ cop1 = maybe_constant_value (cop1);
+
+ if (!processing_template_decl && tcode0 == INTEGER_TYPE
+ && (TREE_CODE (cop1) != INTEGER_CST
+ || integer_zerop (cop1)
+ || integer_minus_onep (cop1)))
+ doing_div_or_mod = true;
- warn_for_div_by_zero (location, maybe_constant_value (cop1));
+ warn_for_div_by_zero (location, cop1);
if (tcode0 == COMPLEX_TYPE || tcode0 == VECTOR_TYPE)
tcode0 = TREE_CODE (TREE_TYPE (TREE_TYPE (op0)));
@@ -4109,8 +4123,14 @@ cp_build_binary_op (location_t location,
case FLOOR_MOD_EXPR:
{
tree cop1 = fold_non_dependent_expr_sfinae (op1, tf_none);
+ cop1 = maybe_constant_value (cop1);
- warn_for_div_by_zero (location, maybe_constant_value (cop1));
+ if (!processing_template_decl && code0 == INTEGER_TYPE
+ && (TREE_CODE (cop1) != INTEGER_CST
+ || integer_zerop (cop1)
+ || integer_minus_onep (cop1)))
+ doing_div_or_mod = true;
+ warn_for_div_by_zero (location, cop1);
}
if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE
@@ -4164,6 +4184,7 @@ cp_build_binary_op (location_t location,
if (TREE_CODE (const_op1) != INTEGER_CST)
const_op1 = op1;
result_type = type0;
+ doing_shift = true;
if (TREE_CODE (const_op1) == INTEGER_CST)
{
if (tree_int_cst_lt (const_op1, integer_zero_node))
@@ -4211,6 +4232,7 @@ cp_build_binary_op (location_t location,
if (TREE_CODE (const_op1) != INTEGER_CST)
const_op1 = op1;
result_type = type0;
+ doing_shift = true;
if (TREE_CODE (const_op1) == INTEGER_CST)
{
if (tree_int_cst_lt (const_op1, integer_zero_node))
@@ -4607,6 +4629,18 @@ cp_build_binary_op (location_t location,
break;
}
+ if (flag_ubsan && doing_div_or_mod)
+ {
+ resultcode = COMPOUND_EXPR;
+ return ubsan_instrument_division (location, code, op0, op1);
+ }
+
+ if (flag_ubsan && doing_shift)
+ {
+ resultcode = COMPOUND_EXPR;
+ return ubsan_instrument_shift (location, code, op0, op1);
+ }
+
if (((code0 == INTEGER_TYPE || code0 == REAL_TYPE || code0 == COMPLEX_TYPE
|| code0 == ENUMERAL_TYPE)
&& (code1 == INTEGER_TYPE || code1 == REAL_TYPE
--- gcc/common.opt.mp 2013-06-05 18:23:41.075439828 +0200
+++ gcc/common.opt 2013-06-05 18:26:04.740921145 +0200
@@ -858,6 +858,10 @@ fsanitize=thread
Common Report Var(flag_tsan)
Enable ThreadSanitizer, a data race detector
+fsanitize=undefined
+Common Report Var(flag_ubsan)
+Enable UndefinedBehaviorSanitizer, an undefined behavior detector
+
fasynchronous-unwind-tables
Common Report Var(flag_asynchronous_unwind_tables) Optimization
Generate unwind tables that are exact at each instruction boundary
--- gcc/builtin-attrs.def.mp 2013-06-05 18:23:41.071439812 +0200
+++ gcc/builtin-attrs.def 2013-06-05 18:26:04.727921093 +0200
@@ -83,6 +83,7 @@ DEF_LIST_INT_INT (5,6)
#undef DEF_LIST_INT_INT
/* Construct trees for identifiers. */
+DEF_ATTR_IDENT (ATTR_COLD, "cold")
DEF_ATTR_IDENT (ATTR_CONST, "const")
DEF_ATTR_IDENT (ATTR_FORMAT, "format")
DEF_ATTR_IDENT (ATTR_FORMAT_ARG, "format_arg")
@@ -130,6 +131,8 @@ DEF_ATTR_TREE_LIST (ATTR_NORETURN_NOTHRO
ATTR_NULL, ATTR_NOTHROW_LIST)
DEF_ATTR_TREE_LIST (ATTR_NORETURN_NOTHROW_LEAF_LIST, ATTR_NORETURN,\
ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
+DEF_ATTR_TREE_LIST (ATTR_COLD_NORETURN_NOTHROW_LEAF_LIST, ATTR_COLD,\
+ ATTR_NULL, ATTR_NORETURN_NOTHROW_LEAF_LIST)
DEF_ATTR_TREE_LIST (ATTR_CONST_NORETURN_NOTHROW_LEAF_LIST, ATTR_CONST,\
ATTR_NULL, ATTR_NORETURN_NOTHROW_LEAF_LIST)
DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_LIST, ATTR_MALLOC, \
--- gcc/c/c-typeck.c.mp 2013-06-05 18:23:41.073439820 +0200
+++ gcc/c/c-typeck.c 2013-06-05 18:26:04.736921129 +0200
@@ -37,6 +37,7 @@ along with GCC; see the file COPYING3.
#include "tree-iterator.h"
#include "bitmap.h"
#include "gimple.h"
+#include "ubsan.h"
#include "c-family/c-objc.h"
#include "c-family/c-common.h"
@@ -9542,6 +9543,12 @@ build_binary_op (location_t location, en
operands to truth-values. */
bool boolean_op = false;
+ /* Remember whether we're doing / or %. */
+ bool doing_div_or_mod = false;
+
+ /* Remember whether we're doing << or >>. */
+ bool doing_shift = false;
+
if (location == UNKNOWN_LOCATION)
location = input_location;
@@ -9743,6 +9750,7 @@ build_binary_op (location_t location, en
case FLOOR_DIV_EXPR:
case ROUND_DIV_EXPR:
case EXACT_DIV_EXPR:
+ doing_div_or_mod = true;
warn_for_div_by_zero (location, op1);
if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE
@@ -9790,6 +9798,7 @@ build_binary_op (location_t location, en
case TRUNC_MOD_EXPR:
case FLOOR_MOD_EXPR:
+ doing_div_or_mod = true;
warn_for_div_by_zero (location, op1);
if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE
@@ -9888,6 +9897,7 @@ build_binary_op (location_t location, en
else if ((code0 == INTEGER_TYPE || code0 == FIXED_POINT_TYPE)
&& code1 == INTEGER_TYPE)
{
+ doing_shift = true;
if (TREE_CODE (op1) == INTEGER_CST)
{
if (tree_int_cst_sgn (op1) < 0)
@@ -9940,6 +9950,7 @@ build_binary_op (location_t location, en
else if ((code0 == INTEGER_TYPE || code0 == FIXED_POINT_TYPE)
&& code1 == INTEGER_TYPE)
{
+ doing_shift = true;
if (TREE_CODE (op1) == INTEGER_CST)
{
if (tree_int_cst_sgn (op1) < 0)
@@ -10224,6 +10235,20 @@ build_binary_op (location_t location, en
return error_mark_node;
}
+ if (flag_ubsan && doing_div_or_mod)
+ {
+ ret = ubsan_instrument_division (location, code, op0, op1);
+ resultcode = COMPOUND_EXPR;
+ goto return_build_binary_op;
+ }
+
+ if (flag_ubsan && doing_shift)
+ {
+ ret = ubsan_instrument_shift (location, code, op0, op1);
+ resultcode = COMPOUND_EXPR;
+ goto return_build_binary_op;
+ }
+
if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE || code0 == COMPLEX_TYPE
|| code0 == FIXED_POINT_TYPE || code0 == VECTOR_TYPE)
&&
--- gcc/asan.c.mp 2013-06-05 18:23:41.070439808 +0200
+++ gcc/asan.c 2013-06-05 18:26:04.726921089 +0200
@@ -2034,6 +2034,9 @@ initialize_sanitizer_builtins (void)
tree BT_FN_VOID = build_function_type_list (void_type_node, NULL_TREE);
tree BT_FN_VOID_PTR
= build_function_type_list (void_type_node, ptr_type_node, NULL_TREE);
+ tree BT_FN_VOID_PTR_PTR_PTR
+ = build_function_type_list (void_type_node, ptr_type_node,
+ ptr_type_node, ptr_type_node, NULL_TREE);
tree BT_FN_VOID_PTR_PTRMODE
= build_function_type_list (void_type_node, ptr_type_node,
build_nonstandard_integer_type (POINTER_SIZE,
@@ -2099,6 +2102,9 @@ initialize_sanitizer_builtins (void)
#undef ATTR_TMPURE_NORETURN_NOTHROW_LEAF_LIST
#define ATTR_TMPURE_NORETURN_NOTHROW_LEAF_LIST \
ECF_TM_PURE | ATTR_NORETURN_NOTHROW_LEAF_LIST
+#undef ATTR_COLD_NORETURN_NOTHROW_LEAF_LIST
+#define ATTR_COLD_NORETURN_NOTHROW_LEAF_LIST \
+ /* ECF_COLD missing */ ATTR_NORETURN_NOTHROW_LEAF_LIST
#undef DEF_SANITIZER_BUILTIN
#define DEF_SANITIZER_BUILTIN(ENUM, NAME, TYPE, ATTRS) \
decl = add_builtin_function ("__builtin_" NAME, TYPE, ENUM, \
Marek
More information about the Gcc-patches
mailing list