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// Regression test for https://github.com/google/sanitizers/issues/691
// RUN: %clangxx_asan -O0 %s -o %t -fstack-protector
// RUN: %run %t 1 2>&1 | FileCheck %s
// RUN: %run %t 2 2>&1 | FileCheck %s
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
// MSVC provides _alloca instead of alloca.
#if defined(_MSC_VER) && !defined(alloca)
# define alloca _alloca
#endif
#if defined(__sun__) && defined(__svr4__)
#include <alloca.h>
#endif
void f1_alloca() {
char *dynamic_buffer = (char *)alloca(200);
fprintf(stderr, "dynamic_buffer = %p\n", dynamic_buffer);
memset(dynamic_buffer, 'y', 200);
return;
}
static const int kDynamicArraySize = 200;
void f1_vla() {
char dynamic_buffer[kDynamicArraySize];
fprintf(stderr, "dynamic_buffer = %p\n", dynamic_buffer);
memset(dynamic_buffer, 'y', kDynamicArraySize);
return;
}
void f2() {
char buf[1024];
memset(buf, 'x', 1024);
}
int main(int argc, const char *argv[]) {
if (!strcmp(argv[1], "1")) {
f1_alloca();
} else if (!strcmp(argv[1], "2")) {
f1_vla();
}
f2();
fprintf(stderr, "Done.\n");
return 0;
}
// CHECK-NOT: ERROR: AddressSanitizer
// CHECK: Done.
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