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// RUN: %clang_analyze_cc1 -verify %s \
// RUN: -analyzer-checker=core \
// RUN: -analyzer-checker=debug.ExprInspection \
// RUN: -analyzer-checker=apiModeling.StdCLibraryFunctions \
// RUN: -analyzer-checker=apiModeling.Errno \
// RUN: -analyzer-checker=alpha.unix.Errno \
// RUN: -analyzer-config apiModeling.StdCLibraryFunctions:ModelPOSIX=true
#include "Inputs/errno_var.h"
typedef typeof(sizeof(int)) size_t;
typedef __typeof(sizeof(int)) off_t;
typedef size_t ssize_t;
ssize_t send(int sockfd, const void *buf, size_t len, int flags);
off_t lseek(int fildes, off_t offset, int whence);
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;
}
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