| // 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]] |
| } |