c5978f42ec
Sometimes people get minimal crash reports after a UBSAN incident. This change tags each trap with an integer representing the kind of failure encountered, which can aid in tracking down the root cause of the problem.
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
// RUN: %clang_cc1 -fsanitize=local-bounds -emit-llvm -triple x86_64-apple-darwin10 %s -o - | FileCheck %s
|
|
// RUN: %clang_cc1 -fsanitize=local-bounds -fexperimental-new-pass-manager -emit-llvm -triple x86_64-apple-darwin10 %s -o - | FileCheck %s
|
|
// RUN: %clang_cc1 -fsanitize=array-bounds -O -fsanitize-trap=array-bounds -emit-llvm -triple x86_64-apple-darwin10 -DNO_DYNAMIC %s -o - | FileCheck %s --check-prefixes=CHECK,NONLOCAL
|
|
// RUN: %clang_cc1 -fsanitize=array-bounds -O -fsanitize-trap=array-bounds -fexperimental-new-pass-manager -emit-llvm -triple x86_64-apple-darwin10 -DNO_DYNAMIC %s -o - | FileCheck %s --check-prefixes=CHECK,NONLOCAL
|
|
//
|
|
// REQUIRES: x86-registered-target
|
|
|
|
// CHECK-LABEL: @f
|
|
double f(int b, int i) {
|
|
double a[b];
|
|
// CHECK: call {{.*}} @llvm.{{(ubsan)?trap}}
|
|
return a[i];
|
|
}
|
|
|
|
// CHECK-LABEL: @f2
|
|
void f2() {
|
|
// everything is constant; no trap possible
|
|
// CHECK-NOT: call {{.*}} @llvm.{{(ubsan)?trap}}
|
|
int a[2];
|
|
a[1] = 42;
|
|
|
|
#ifndef NO_DYNAMIC
|
|
short *b = malloc(64);
|
|
b[5] = *a + a[1] + 2;
|
|
#endif
|
|
}
|
|
|
|
// CHECK-LABEL: @f3
|
|
void f3() {
|
|
int a[1];
|
|
// CHECK: call {{.*}} @llvm.{{(ubsan)?trap}}
|
|
a[2] = 1;
|
|
}
|
|
|
|
union U { int a[0]; int b[1]; int c[2]; };
|
|
|
|
// CHECK-LABEL: define {{.*}} @f4
|
|
int f4(union U *u, int i) {
|
|
// a and b are treated as flexible array members.
|
|
// CHECK-NOT: @llvm.ubsantrap
|
|
return u->a[i] + u->b[i];
|
|
// CHECK: }
|
|
}
|
|
|
|
// CHECK-LABEL: define {{.*}} @f5
|
|
int f5(union U *u, int i) {
|
|
// c is not a flexible array member.
|
|
// NONLOCAL: call {{.*}} @llvm.ubsantrap
|
|
return u->c[i];
|
|
// CHECK: }
|
|
}
|