65 lines · c
1// RUN: %clang_dfsan -gmlt %s -o %t && %run %t >%t.out 2>&12// RUN: FileCheck %s < %t.out3 4#include <assert.h>5#include <sanitizer/dfsan_interface.h>6#include <stdio.h>7#include <string.h>8 9#define NOINLINE __attribute__((noinline))10 11NOINLINE size_t bar(int depth, char *buf, size_t len) {12 if (!depth) {13 return dfsan_sprint_stack_trace(buf, len);14 }15 16 return bar(depth - 1, buf, len);17}18 19NOINLINE size_t baz(int depth, char *buf, size_t len) {20 return bar(depth, buf, len);21}22 23int main(int argc, char *argv[]) {24 char buf[3000];25 size_t length = dfsan_sprint_stack_trace(buf, sizeof(buf));26 assert(length < sizeof(buf));27 printf("==OUTPUT==\n%s==EOS==\n", buf);28 29 // CHECK: ==OUTPUT==30 // CHECK: #0 {{.*}} in main [[FILEPATH:.*]]/stack_trace.c:[[# @LINE - 5 ]]31 // CHECK: ==EOS==32 33 length = baz(8, buf, sizeof(buf));34 printf("==OUTPUT==\n%s==EOS==\n", buf);35 36 // CHECK: ==OUTPUT==37 // CHECK: #0 {{.*}} in bar.dfsan [[FILEPATH]]/stack_trace.c:1338 // CHECK-COUNT-8: #{{[1-9]+}} {{.*}} in bar.dfsan [[FILEPATH]]/stack_trace.c:1639 // CHECK: #9 {{.*}} in baz.dfsan [[FILEPATH]]/stack_trace.c:2040 // CHECK: #10 {{.*}} in main [[FILEPATH]]/stack_trace.c:[[# @LINE - 7 ]]41 // CHECK: ==EOS==42 43 char tinybuf[8];44 size_t same_length = baz(8, tinybuf, sizeof(tinybuf));45 46 printf("==TRUNCATED OUTPUT==\n%s==EOS==\n", tinybuf);47 // CHECK: ==TRUNCATED OUTPUT==48 // CHECK: #0 ==EOS==49 50 printf("Returned length: %zu\n", length);51 printf("Actual length: %zu\n", strlen(buf));52 printf("Returned length with truncation: %zu\n", same_length);53 54 // CHECK: Returned length: [[#LEN:]]55 // CHECK: Actual length: [[#LEN]]56 // CHECK: Returned length with truncation: [[#LEN]]57 58 buf[0] = '\0';59 length = baz(8, buf, 0);60 printf("Output=\"%s\"\n", buf);61 printf("Returned length: %zu\n", length);62 // CHECK: Output=""63 // CHECK: Returned length: [[#LEN]]64}65