Reimplement -fsanitize-recover family of flags.
Introduce the following -fsanitize-recover flags:
- -fsanitize-recover=<list>: Enable recovery for selected checks or
group of checks. It is forbidden to explicitly list unrecoverable
sanitizers here (that is, "address", "unreachable", "return").
- -fno-sanitize-recover=<list>: Disable recovery for selected checks or
group of checks.
- -f(no-)?sanitize-recover is now a synonym for
-f(no-)?sanitize-recover=undefined,integer and will soon be deprecated.
These flags are parsed left to right, and mask of "recoverable"
sanitizer is updated accordingly, much like what we do for -fsanitize= flags.
-fsanitize= and -fsanitize-recover= flag families are independent.
CodeGen change: If there is a single UBSan handler function, responsible
for implementing multiple checks, which have different recoverable setting,
then we emit two handler calls instead of one:
the first one for the set of "unrecoverable" checks, another one - for
set of "recoverable" checks. If all checks implemented by a handler have the
same recoverability setting, then the generated code will be the same.
llvm-svn: 225719
2015-01-13 06:39:12 +08:00
|
|
|
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsanitize=unsigned-integer-overflow -fsanitize-recover=unsigned-integer-overflow %s -emit-llvm -o - | FileCheck %s --check-prefix=RECOVER
|
|
|
|
|
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsanitize=unsigned-integer-overflow %s -emit-llvm -o - | FileCheck %s --check-prefix=ABORT
|
|
|
|
|
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsanitize=null,object-size,alignment -fsanitize-recover=object-size %s -emit-llvm -o - | FileCheck %s --check-prefix=PARTIAL
|
2012-12-03 03:50:33 +08:00
|
|
|
|
|
|
|
|
// RECOVER: @test
|
|
|
|
|
// ABORT: @test
|
|
|
|
|
void test() {
|
|
|
|
|
extern volatile unsigned x, y, z;
|
|
|
|
|
|
|
|
|
|
// RECOVER: uadd.with.overflow.i32
|
|
|
|
|
// RECOVER: ubsan_handle_add_overflow(
|
|
|
|
|
// RECOVER-NOT: unreachable
|
|
|
|
|
// ABORT: uadd.with.overflow.i32
|
|
|
|
|
// ABORT: ubsan_handle_add_overflow_abort(
|
|
|
|
|
// ABORT: unreachable
|
|
|
|
|
x = y + z;
|
|
|
|
|
}
|
Reimplement -fsanitize-recover family of flags.
Introduce the following -fsanitize-recover flags:
- -fsanitize-recover=<list>: Enable recovery for selected checks or
group of checks. It is forbidden to explicitly list unrecoverable
sanitizers here (that is, "address", "unreachable", "return").
- -fno-sanitize-recover=<list>: Disable recovery for selected checks or
group of checks.
- -f(no-)?sanitize-recover is now a synonym for
-f(no-)?sanitize-recover=undefined,integer and will soon be deprecated.
These flags are parsed left to right, and mask of "recoverable"
sanitizer is updated accordingly, much like what we do for -fsanitize= flags.
-fsanitize= and -fsanitize-recover= flag families are independent.
CodeGen change: If there is a single UBSan handler function, responsible
for implementing multiple checks, which have different recoverable setting,
then we emit two handler calls instead of one:
the first one for the set of "unrecoverable" checks, another one - for
set of "recoverable" checks. If all checks implemented by a handler have the
same recoverability setting, then the generated code will be the same.
llvm-svn: 225719
2015-01-13 06:39:12 +08:00
|
|
|
|
|
|
|
|
void foo() {
|
|
|
|
|
union { int i; } u;
|
|
|
|
|
u.i=1;
|
|
|
|
|
// PARTIAL: %[[CHECK0:.*]] = icmp ne {{.*}}* %[[PTR:.*]], null
|
|
|
|
|
|
|
|
|
|
// PARTIAL: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(i8* {{.*}}, i1 false)
|
|
|
|
|
// PARTIAL-NEXT: %[[CHECK1:.*]] = icmp uge i64 %[[SIZE]], 4
|
|
|
|
|
|
|
|
|
|
// PARTIAL: %[[MISALIGN:.*]] = and i64 {{.*}}, 3
|
|
|
|
|
// PARTIAL-NEXT: %[[CHECK2:.*]] = icmp eq i64 %[[MISALIGN]], 0
|
|
|
|
|
|
|
|
|
|
// PARTIAL: %[[CHECK02:.*]] = and i1 %[[CHECK0]], %[[CHECK2]]
|
|
|
|
|
// PARTIAL-NEXT: %[[CHECK012:.*]] = and i1 %[[CHECK02]], %[[CHECK1]]
|
|
|
|
|
|
|
|
|
|
// PARTIAL: br i1 %[[CHECK012]], {{.*}} !prof ![[WEIGHT_MD:.*]], !nosanitize
|
|
|
|
|
|
|
|
|
|
// PARTIAL: br i1 %[[CHECK02]], {{.*}}
|
|
|
|
|
// PARTIAL: call void @__ubsan_handle_type_mismatch_abort(
|
|
|
|
|
// PARTIAL-NEXT: unreachable
|
|
|
|
|
// PARTIAL: call void @__ubsan_handle_type_mismatch(
|
|
|
|
|
}
|