| // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.unix.Stream -analyzer-output text -verify %s |
| |
| #include "Inputs/system-header-simulator.h" |
| |
| void check_note_at_correct_open() { |
| FILE *F1 = tmpfile(); // expected-note {{Stream opened here}} |
| if (!F1) |
| // expected-note@-1 {{'F1' is non-null}} |
| // expected-note@-2 {{Taking false branch}} |
| return; |
| FILE *F2 = tmpfile(); |
| if (!F2) { |
| // expected-note@-1 {{'F2' is non-null}} |
| // expected-note@-2 {{Taking false branch}} |
| fclose(F1); |
| return; |
| } |
| rewind(F2); |
| fclose(F2); |
| rewind(F1); |
| } |
| // expected-warning@-1 {{Opened stream never closed. Potential resource leak}} |
| // expected-note@-2 {{Opened stream never closed. Potential resource leak}} |
| |
| void check_note_fopen() { |
| FILE *F = fopen("file", "r"); // expected-note {{Stream opened here}} |
| if (!F) |
| // expected-note@-1 {{'F' is non-null}} |
| // expected-note@-2 {{Taking false branch}} |
| return; |
| } |
| // expected-warning@-1 {{Opened stream never closed. Potential resource leak}} |
| // expected-note@-2 {{Opened stream never closed. Potential resource leak}} |
| |
| void check_note_freopen() { |
| FILE *F = fopen("file", "r"); // expected-note {{Stream opened here}} |
| if (!F) |
| // expected-note@-1 {{'F' is non-null}} |
| // expected-note@-2 {{Taking false branch}} |
| return; |
| F = freopen(0, "w", F); // expected-note {{Stream reopened here}} |
| if (!F) |
| // expected-note@-1 {{'F' is non-null}} |
| // expected-note@-2 {{Taking false branch}} |
| return; |
| } |
| // expected-warning@-1 {{Opened stream never closed. Potential resource leak}} |
| // expected-note@-2 {{Opened stream never closed. Potential resource leak}} |
| |
| void check_note_leak_2(int c) { |
| FILE *F1 = fopen("foo1.c", "r"); // expected-note {{Stream opened here}} |
| if (!F1) |
| // expected-note@-1 {{'F1' is non-null}} |
| // expected-note@-2 {{Taking false branch}} |
| // expected-note@-3 {{'F1' is non-null}} |
| // expected-note@-4 {{Taking false branch}} |
| return; |
| FILE *F2 = fopen("foo2.c", "r"); // expected-note {{Stream opened here}} |
| if (!F2) { |
| // expected-note@-1 {{'F2' is non-null}} |
| // expected-note@-2 {{Taking false branch}} |
| // expected-note@-3 {{'F2' is non-null}} |
| // expected-note@-4 {{Taking false branch}} |
| fclose(F1); |
| return; |
| } |
| if (c) |
| // expected-note@-1 {{Assuming 'c' is not equal to 0}} |
| // expected-note@-2 {{Taking true branch}} |
| // expected-note@-3 {{Assuming 'c' is not equal to 0}} |
| // expected-note@-4 {{Taking true branch}} |
| return; |
| // expected-warning@-1 {{Opened stream never closed. Potential resource leak}} |
| // expected-note@-2 {{Opened stream never closed. Potential resource leak}} |
| // expected-warning@-3 {{Opened stream never closed. Potential resource leak}} |
| // expected-note@-4 {{Opened stream never closed. Potential resource leak}} |
| fclose(F1); |
| fclose(F2); |
| } |
| |
| void check_track_null() { |
| FILE *F; |
| F = fopen("foo1.c", "r"); // expected-note {{Value assigned to 'F'}} expected-note {{Assuming pointer value is null}} |
| if (F != NULL) { // expected-note {{Taking false branch}} expected-note {{'F' is equal to NULL}} |
| fclose(F); |
| return; |
| } |
| fclose(F); // expected-warning {{Stream pointer might be NULL}} |
| // expected-note@-1 {{Stream pointer might be NULL}} |
| } |
| |
| void check_eof_notes_feof_after_feof() { |
| FILE *F; |
| char Buf[10]; |
| F = fopen("foo1.c", "r"); |
| if (F == NULL) { // expected-note {{Taking false branch}} expected-note {{'F' is not equal to NULL}} |
| return; |
| } |
| fread(Buf, 1, 1, F); |
| if (feof(F)) { // expected-note {{Taking true branch}} |
| clearerr(F); |
| fread(Buf, 1, 1, F); // expected-note {{Assuming stream reaches end-of-file here}} |
| if (feof(F)) { // expected-note {{Taking true branch}} |
| fread(Buf, 1, 1, F); // expected-warning {{Read function called when stream is in EOF state. Function has no effect}} |
| // expected-note@-1 {{Read function called when stream is in EOF state. Function has no effect}} |
| } |
| } |
| fclose(F); |
| } |
| |
| void check_eof_notes_feof_after_no_feof() { |
| FILE *F; |
| char Buf[10]; |
| F = fopen("foo1.c", "r"); |
| if (F == NULL) { // expected-note {{Taking false branch}} expected-note {{'F' is not equal to NULL}} |
| return; |
| } |
| fread(Buf, 1, 1, F); |
| if (feof(F)) { // expected-note {{Taking false branch}} |
| fclose(F); |
| return; |
| } else if (ferror(F)) { // expected-note {{Taking false branch}} |
| fclose(F); |
| return; |
| } |
| fread(Buf, 1, 1, F); // expected-note {{Assuming stream reaches end-of-file here}} |
| if (feof(F)) { // expected-note {{Taking true branch}} |
| fread(Buf, 1, 1, F); // expected-warning {{Read function called when stream is in EOF state. Function has no effect}} |
| // expected-note@-1 {{Read function called when stream is in EOF state. Function has no effect}} |
| } |
| fclose(F); |
| } |
| |
| void check_eof_notes_feof_or_no_error() { |
| FILE *F; |
| char Buf[10]; |
| F = fopen("foo1.c", "r"); |
| if (F == NULL) // expected-note {{Taking false branch}} expected-note {{'F' is not equal to NULL}} |
| return; |
| int RRet = fread(Buf, 1, 1, F); // expected-note {{Assuming stream reaches end-of-file here}} |
| if (ferror(F)) { // expected-note {{Taking false branch}} |
| } else { |
| fread(Buf, 1, 1, F); // expected-warning {{Read function called when stream is in EOF state. Function has no effect}} |
| // expected-note@-1 {{Read function called when stream is in EOF state. Function has no effect}} |
| } |
| fclose(F); |
| } |