stack-oob-frames.cpp
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// RUN: %clangxx_asan -O1 %s -o %t
// RUN: not %run %t 0 2>&1 | FileCheck %s --check-prefix=CHECK0
// RUN: not %run %t 1 2>&1 | FileCheck %s --check-prefix=CHECK1
// RUN: not %run %t 2 2>&1 | FileCheck %s --check-prefix=CHECK2
// RUN: not %run %t 3 2>&1 | FileCheck %s --check-prefix=CHECK3
#define NOINLINE __attribute__((noinline))
inline void break_optimization(void *arg) {
__asm__ __volatile__("" : : "r" (arg) : "memory");
}
NOINLINE static void Frame0(int frame, char *a, char *b, char *c) {
char s[4] = {0};
char *d = s;
break_optimization(&d);
switch (frame) {
case 3: a[5]++; break;
case 2: b[5]++; break;
case 1: c[5]++; break;
case 0: d[5]++; break;
}
}
NOINLINE static void Frame1(int frame, char *a, char *b) {
char c[4] = {0}; Frame0(frame, a, b, c);
break_optimization(0);
}
NOINLINE static void Frame2(int frame, char *a) {
char b[4] = {0}; Frame1(frame, a, b);
break_optimization(0);
}
NOINLINE static void Frame3(int frame) {
char a[4] = {0}; Frame2(frame, a);
break_optimization(0);
}
int main(int argc, char **argv) {
if (argc != 2) return 1;
Frame3(argv[1][0] - '0');
}
// CHECK0: AddressSanitizer: stack-buffer-overflow
// CHECK0: #0{{.*}}Frame0
// CHECK0: #1{{.*}}Frame1
// CHECK0: #2{{.*}}Frame2
// CHECK0: #3{{.*}}Frame3
// CHECK0: is located in stack of thread T0 at offset
// CHECK0-NEXT: #0{{.*}}Frame0
//
// CHECK1: AddressSanitizer: stack-buffer-overflow
// CHECK1: is located in stack of thread T0 at offset
// CHECK1-NEXT: #0{{.*}}Frame1
//
// CHECK2: AddressSanitizer: stack-buffer-overflow
// CHECK2: is located in stack of thread T0 at offset
// CHECK2-NEXT: #0{{.*}}Frame2
//
// CHECK3: AddressSanitizer: stack-buffer-overflow
// CHECK3: is located in stack of thread T0 at offset
// CHECK3-NEXT: #0{{.*}}Frame3