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// RUN: %clangxx_asan -O0 %s -o %t -mllvm -asan-detect-invalid-pointer-pair
// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 %run %t k 2>&1 | FileCheck %s -check-prefix=OK -allow-empty
// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 not %run %t g 2>&1 | FileCheck %s -check-prefix=CMP -check-prefix=ALL-ERRORS
// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 not %run %t s 2>&1 | FileCheck %s -check-prefix=SUB -check-prefix=ALL-ERRORS
// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 not %run %t f 2>&1 | FileCheck %s -check-prefix=FREE -check-prefix=ALL-ERRORS
#include <assert.h>
#include <stdlib.h>
int f(char c, char *p, char *q) {
// ALL-ERRORS: ERROR: AddressSanitizer: invalid-pointer-pair
// [[PTR1:0x[0-9a-f]+]] [[PTR2:0x[0-9a-f]+]]
switch (c) {
case 'g':
// CMP: #{{[0-9]+ .*}} in f({{char, *char *\*, *char *\*}}) {{.*}}invalid-pointer-pairs.cpp:[[@LINE+1]]
return p > q;
case 's':
// SUB: #{{[0-9]+ .*}} in f({{char, *char *\*, *char *\*}}) {{.*}}invalid-pointer-pairs.cpp:[[@LINE+1]]
return p - q;
case 'k': {
// OK-NOT: ERROR
char *p2 = p + 20;
return p > p2;
}
case 'f': {
char *p3 = p + 20;
free(p);
// FREE: #{{[0-9]+ .*}} in f({{char, *char *\*, *char *\*}}) {{.*}}invalid-pointer-pairs.cpp:[[@LINE+2]]
// FREE: freed by thread
return p < p3;
}
}
assert(0);
}
int main(int argc, char **argv) {
char *p = (char *)malloc(42);
char *q = (char *)malloc(42);
assert(argc >= 2);
f(argv[1][0], p, q);
free(p);
free(q);
}
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