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