1 // RUN: %clang_cc1 -fsanitize=local-bounds -emit-llvm -triple x86_64-apple-darwin10 %s -o - | FileCheck %s 2 // 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 3 // 4 // REQUIRES: x86-registered-target 5 6 // CHECK-LABEL: @f 7 double f(int b, int i) { 8 double a[b]; 9 // CHECK: call {{.*}} @llvm.{{(ubsan)?trap}} 10 return a[i]; 11 } 12 13 // CHECK-LABEL: @f2 14 void f2(void) { 15 // everything is constant; no trap possible 16 // CHECK-NOT: call {{.*}} @llvm.{{(ubsan)?trap}} 17 int a[2]; 18 a[1] = 42; 19 20 #ifndef NO_DYNAMIC 21 short *b = malloc(64); 22 b[5] = *a + a[1] + 2; 23 #endif 24 } 25 26 // CHECK-LABEL: @f3 27 void f3(void) { 28 int a[1]; 29 // CHECK: call {{.*}} @llvm.{{(ubsan)?trap}} 30 a[2] = 1; 31 } 32 33 union U { int a[0]; int b[1]; int c[2]; }; 34 35 // CHECK-LABEL: define {{.*}} @f4 36 int f4(union U *u, int i) { 37 // a and b are treated as flexible array members. 38 // CHECK-NOT: @llvm.ubsantrap 39 return u->a[i] + u->b[i]; 40 // CHECK: } 41 } 42 43 // CHECK-LABEL: define {{.*}} @f5 44 int f5(union U *u, int i) { 45 // c is not a flexible array member. 46 // NONLOCAL: call {{.*}} @llvm.ubsantrap 47 return u->c[i]; 48 // CHECK: } 49 } 50 51 __attribute__((no_sanitize("bounds"))) 52 int f6(int i) { 53 int b[64]; 54 // CHECK-NOT: call void @llvm.trap() 55 // CHECK-NOT: trap: 56 // CHECK-NOT: cont: 57 return b[i]; 58 } 59