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// RUN: %clang_tysan -O0 %s -o %t && %run %t 10 >%t.out.0 2>&1
// RUN: FileCheck %s < %t.out.0
// RUN: %clang_tysan -O2 %s -o %t && %run %t 10 >%t.out 2>&1
// RUN: FileCheck %s < %t.out
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void __attribute__((noinline)) add_flt(float *a) {
*a += 2.0f;
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: READ of size 4 at {{.*}} with type float accesses an existing object of type int
// CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-3]]
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: WRITE of size 4 at {{.*}} with type float accesses an existing object of type int
// CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-6]]
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: READ of size 4 at {{.*}} with type float accesses an existing object of type long
// CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-9]]
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: WRITE of size 4 at {{.*}} with type float accesses an existing object of type long
// CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-12]]
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: READ of size 4 at {{.*}} with type float accesses part of an existing object of type long that starts at offset -4
// CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-15]]
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: WRITE of size 4 at {{.*}} with type float accesses part of an existing object of type long that starts at offset -4
// CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-18]]
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: READ of size 4 at {{.*}} with type float partially accesses an object of type short that starts at offset 2
// CHECK: {{#0 0x.* in add_flt .*basic.c:}}[[@LINE-21]]
}
int main(int argc, char *argv[]) {
int x = atoi(argv[1]);
add_flt((float *)&x);
printf("x = %d\n", x);
long y = x;
add_flt((float *)&y);
printf("y = %ld\n", y);
add_flt(((float *)&y) + 1);
printf("y = %ld\n", y);
char *mem = (char *)malloc(4 * sizeof(short));
memset(mem, 0, 4 * sizeof(short));
*(short *)(mem + 2) = x;
add_flt((float *)mem);
short s1 = *(short *)mem;
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: READ of size 2 at {{.*}} with type short accesses an existing object of type float
// CHECK: {{#0 0x.* in main .*basic.c:}}[[@LINE-3]]
short s2 = *(short *)(mem + 2);
// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
// CHECK: READ of size 2 at {{.*}} with type short accesses part of an existing object of type float that starts at offset -2
// CHECK: {{#0 0x.* in main .*basic.c:}}[[@LINE-3]]
printf("m[0] = %d, m[1] = %d\n", s1, s2);
free(mem);
return 0;
}
// CHECK-NOT: ERROR: TypeSanitizer: type-aliasing-violation
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