| // RUN: %clang_analyze_cc1 -verify %s \ |
| // RUN: -analyzer-checker=core \ |
| // RUN: -analyzer-checker=debug.ExprInspection \ |
| // RUN: -analyzer-checker=unix.StdCLibraryFunctions \ |
| // RUN: -analyzer-checker=apiModeling.Errno \ |
| // RUN: -analyzer-checker=unix.Errno \ |
| // RUN: -analyzer-config unix.StdCLibraryFunctions:ModelPOSIX=true |
| |
| #include "Inputs/errno_var.h" |
| #include "Inputs/std-c-library-functions-POSIX.h" |
| |
| #define NULL ((void *) 0) |
| |
| void clang_analyzer_warnIfReached(); |
| void clang_analyzer_eval(int); |
| |
| int unsafe_errno_read(int sock, void *data, int data_size) { |
| if (send(sock, data, data_size, 0) != data_size) { |
| if (errno == 1) { |
| // expected-warning@-1{{An undefined value may be read from 'errno'}} |
| return 0; |
| } |
| } |
| return 1; |
| } |
| |
| int errno_lseek(int fildes, off_t offset) { |
| off_t result = lseek(fildes, offset, 0); |
| if (result == (off_t)-1) { |
| // Failure path. |
| // check if the function is modeled |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| return 2; |
| } |
| if (result != offset) { |
| // Not success path (?) |
| // not sure if this is a valid case, allow to check 'errno' |
| if (errno == 1) { // no warning |
| return 1; |
| } |
| clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} |
| } |
| if (result == offset) { |
| // The checker does not differentiate for this case. |
| // In general case no relation exists between the arg 2 and the returned |
| // value, only for SEEK_SET. |
| if (errno == 1) { // no warning |
| return 1; |
| } |
| clang_analyzer_warnIfReached(); // expected-warning{{REACHABLE}} |
| } |
| return 0; |
| } |
| |
| void errno_mkstemp(char *template) { |
| int FD = mkstemp(template); |
| if (FD >= 0) { |
| if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}} |
| close(FD); |
| } else { |
| clang_analyzer_eval(FD == -1); // expected-warning{{TRUE}} |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| if (errno) {} // no warning |
| } |
| } |
| |
| void errno_mkdtemp(char *template) { |
| char *Dir = mkdtemp(template); |
| if (Dir == NULL) { |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| if (errno) {} // no warning |
| } else { |
| clang_analyzer_eval(Dir == template); // expected-warning{{TRUE}} |
| if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}} |
| } |
| } |
| |
| void errno_getcwd(char *Buf, size_t Sz) { |
| char *Path = getcwd(Buf, Sz); |
| if (Sz == 0) { |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| clang_analyzer_eval(Path == NULL); // expected-warning{{TRUE}} |
| if (errno) {} // no warning |
| } else if (Path == NULL) { |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| if (errno) {} // no warning |
| } else { |
| clang_analyzer_eval(Path == Buf); // expected-warning{{TRUE}} |
| if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}} |
| } |
| } |
| |
| void errno_execv(char *Path, char * Argv[]) { |
| int Ret = execv(Path, Argv); |
| clang_analyzer_eval(Ret == -1); // expected-warning{{TRUE}} |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| if (errno) {} // no warning |
| } |
| |
| void errno_execvp(char *File, char * Argv[]) { |
| int Ret = execvp(File, Argv); |
| clang_analyzer_eval(Ret == -1); // expected-warning{{TRUE}} |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| if (errno) {} // no warning |
| } |
| |
| void errno_popen(void) { |
| FILE *F = popen("xxx", "r"); |
| if (!F) { |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| if (errno) {} // no-warning |
| } else { |
| if (errno) {} // expected-warning{{An undefined value may be read from 'errno' [unix.Errno]}} |
| pclose(F); |
| } |
| } |
| |
| void errno_pclose(void) { |
| FILE *F = popen("xx", "w"); |
| if (!F) |
| return; |
| int Ret = pclose(F); |
| if (Ret == -1) { |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| if (errno) {} // no-warning |
| } else { |
| clang_analyzer_eval(Ret >= 0); // expected-warning{{TRUE}} |
| if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}} |
| } |
| } |
| |
| void errno_realpath(char *Path, char *Buf) { |
| char *Ret = realpath(Path, Buf); |
| if (!Ret) { |
| clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}} |
| if (errno) {} // no-warning |
| } else { |
| if (errno) {} // expected-warning{{An undefined value may be read from 'errno'}} |
| } |
| } |