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| // RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.unix.SimpleStream -verify %s
#include "Inputs/system-header-simulator-for-simple-stream.h"
void checkDoubleFClose(int *Data) {
FILE *F = fopen("myfile.txt", "w");
if (F != 0) {
fputs ("fopen example", F);
if (!Data)
fclose(F);
else
fputc(*Data, F);
fclose(F); // expected-warning {{Closing a previously closed file stream}}
}
}
int checkLeak(int *Data) {
FILE *F = fopen("myfile.txt", "w");
if (F != 0) {
fputs ("fopen example", F);
}
if (Data) // expected-warning {{Opened file is never closed; potential resource leak}}
return *Data;
else
return 0;
}
void checkLeakFollowedByAssert(int *Data) {
FILE *F = fopen("myfile.txt", "w");
if (F != 0) {
fputs ("fopen example", F);
if (!Data)
exit(0);
fclose(F);
}
}
void CloseOnlyOnValidFileHandle() {
FILE *F = fopen("myfile.txt", "w");
if (F)
fclose(F);
int x = 0; // no warning
}
void leakOnEnfOfPath1(int *Data) {
FILE *F = fopen("myfile.txt", "w");
} // expected-warning {{Opened file is never closed; potential resource leak}}
void leakOnEnfOfPath2(int *Data) {
FILE *F = fopen("myfile.txt", "w");
return; // expected-warning {{Opened file is never closed; potential resource leak}}
}
FILE *leakOnEnfOfPath3(int *Data) {
FILE *F = fopen("myfile.txt", "w");
return F;
}
void myfclose(FILE *F);
void SymbolEscapedThroughFunctionCall() {
FILE *F = fopen("myfile.txt", "w");
myfclose(F);
return; // no warning
}
FILE *GlobalF;
void SymbolEscapedThroughAssignmentToGlobal() {
FILE *F = fopen("myfile.txt", "w");
GlobalF = F;
return; // no warning
}
void SymbolDoesNotEscapeThoughStringAPIs(char *Data) {
FILE *F = fopen("myfile.txt", "w");
fputc(*Data, F);
return; // expected-warning {{Opened file is never closed; potential resource leak}}
}
void passConstPointer(const FILE * F);
void testPassConstPointer() {
FILE *F = fopen("myfile.txt", "w");
passConstPointer(F);
return; // expected-warning {{Opened file is never closed; potential resource leak}}
}
void testPassToSystemHeaderFunctionIndirectly() {
FileStruct fs;
fs.p = fopen("myfile.txt", "w");
fakeSystemHeaderCall(&fs); // invalidates fs, making fs.p unreachable
} // no-warning
void testOverwrite() {
FILE *fp = fopen("myfile.txt", "w");
fp = 0;
} // expected-warning {{Opened file is never closed; potential resource leak}}
|