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// RUN: %clang_dfsan -gmlt %s -o %t && %run %t >%t.out 2>&1
// RUN: FileCheck %s < %t.out
#include <assert.h>
#include <sanitizer/dfsan_interface.h>
#include <stdio.h>
#include <string.h>
#define NOINLINE __attribute__((noinline))
NOINLINE size_t bar(int depth, char *buf, size_t len) {
if (!depth) {
return dfsan_sprint_stack_trace(buf, len);
}
return bar(depth - 1, buf, len);
}
NOINLINE size_t baz(int depth, char *buf, size_t len) {
return bar(depth, buf, len);
}
int main(int argc, char *argv[]) {
char buf[3000];
size_t length = dfsan_sprint_stack_trace(buf, sizeof(buf));
assert(length < sizeof(buf));
printf("==OUTPUT==\n%s==EOS==\n", buf);
// CHECK: ==OUTPUT==
// CHECK: #0 {{.*}} in main [[FILEPATH:.*]]/stack_trace.c:[[# @LINE - 5 ]]
// CHECK: ==EOS==
length = baz(8, buf, sizeof(buf));
printf("==OUTPUT==\n%s==EOS==\n", buf);
// CHECK: ==OUTPUT==
// CHECK: #0 {{.*}} in bar.dfsan [[FILEPATH]]/stack_trace.c:13
// CHECK-COUNT-8: #{{[1-9]+}} {{.*}} in bar.dfsan [[FILEPATH]]/stack_trace.c:16
// CHECK: #9 {{.*}} in baz.dfsan [[FILEPATH]]/stack_trace.c:20
// CHECK: #10 {{.*}} in main [[FILEPATH]]/stack_trace.c:[[# @LINE - 7 ]]
// CHECK: ==EOS==
char tinybuf[8];
size_t same_length = baz(8, tinybuf, sizeof(tinybuf));
printf("==TRUNCATED OUTPUT==\n%s==EOS==\n", tinybuf);
// CHECK: ==TRUNCATED OUTPUT==
// CHECK: #0 ==EOS==
printf("Returned length: %zu\n", length);
printf("Actual length: %zu\n", strlen(buf));
printf("Returned length with truncation: %zu\n", same_length);
// CHECK: Returned length: [[#LEN:]]
// CHECK: Actual length: [[#LEN]]
// CHECK: Returned length with truncation: [[#LEN]]
buf[0] = '\0';
length = baz(8, buf, 0);
printf("Output=\"%s\"\n", buf);
printf("Returned length: %zu\n", length);
// CHECK: Output=""
// CHECK: Returned length: [[#LEN]]
}
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