570bf972f5
The case of NULL stream passed to stream functions was reported by StreamChecker. The same condition is checked already by StdLibraryFunctionsChecker and it is enough to check at one place. The StreamChecker stops now analysis if a passed NULL stream is encountered but generates no report. This change removes a dependency between StdCLibraryFunctionArgs checker and StreamChecker. There is now no more specific message reported by StreamChecker, the previous weak-dependency is not needed. And StreamChecker can be used without StdCLibraryFunctions checker or its ModelPOSIX option. Reviewed By: Szelethus Differential Revision: https://reviews.llvm.org/D137790
203 lines
6.7 KiB
C
203 lines
6.7 KiB
C
// RUN: %clang_analyze_cc1 -verify %s \
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// RUN: -analyzer-checker=core \
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// RUN: -analyzer-checker=alpha.unix.Errno \
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// RUN: -analyzer-checker=alpha.unix.Stream \
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// RUN: -analyzer-checker=apiModeling.StdCLibraryFunctions \
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// RUN: -analyzer-config apiModeling.StdCLibraryFunctions:ModelPOSIX=true \
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// RUN: -analyzer-checker=debug.ExprInspection
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// enable only StdCLibraryFunctions checker
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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=alpha.unix.Errno \
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// RUN: -analyzer-checker=apiModeling.StdCLibraryFunctions \
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// RUN: -analyzer-config apiModeling.StdCLibraryFunctions:ModelPOSIX=true \
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// RUN: -analyzer-checker=debug.ExprInspection
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#include "Inputs/system-header-simulator.h"
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#include "Inputs/errno_var.h"
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void clang_analyzer_eval(int);
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const char *WBuf = "123456789";
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char RBuf[10];
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void test_freopen(FILE *F) {
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F = freopen("xxx", "w", F);
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if (F) {
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if (errno) {} // expected-warning{{undefined}}
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} else {
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clang_analyzer_eval(errno != 0); // expected-warning {{TRUE}}
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}
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}
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void test_fread(FILE *F) {
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size_t Ret = fread(RBuf, 1, 10, F);
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clang_analyzer_eval(F != NULL); // expected-warning {{TRUE}}
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if (Ret == 10) {
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if (errno) {} // expected-warning{{undefined}}
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} else {
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clang_analyzer_eval(Ret < 10); // expected-warning {{TRUE}}
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clang_analyzer_eval(errno != 0); // expected-warning {{TRUE}}
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}
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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}
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void test_fwrite(FILE *F) {
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size_t Ret = fwrite(WBuf, 1, 10, F);
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clang_analyzer_eval(F != NULL); // expected-warning {{TRUE}}
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if (Ret == 10) {
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if (errno) {} // expected-warning{{undefined}}
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} else {
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clang_analyzer_eval(Ret < 10); // expected-warning {{TRUE}}
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clang_analyzer_eval(errno != 0); // expected-warning {{TRUE}}
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}
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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}
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void test_fclose(FILE *F) {
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int Ret = fclose(F);
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clang_analyzer_eval(F != NULL); // expected-warning {{TRUE}}
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if (Ret == 0) {
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if (errno) {} // expected-warning{{undefined}}
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} else {
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clang_analyzer_eval(Ret == EOF); // expected-warning {{TRUE}}
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clang_analyzer_eval(errno != 0); // expected-warning {{TRUE}}
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}
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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}
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void test_fseek(FILE *F) {
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int Ret = fseek(F, SEEK_SET, 1);
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clang_analyzer_eval(F != NULL); // expected-warning {{TRUE}}
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if (Ret == 0) {
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if (errno) {} // expected-warning{{undefined}}
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} else {
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clang_analyzer_eval(Ret == -1); // expected-warning {{TRUE}}
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clang_analyzer_eval(errno != 0); // expected-warning {{TRUE}}
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}
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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}
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void check_fgetpos(FILE *F) {
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errno = 0;
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fpos_t Pos;
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int Ret = fgetpos(F, &Pos);
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clang_analyzer_eval(F != NULL); // expected-warning {{TRUE}}
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if (Ret)
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clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
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else
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clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
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// expected-warning@-1{{FALSE}}
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if (errno) {} // no-warning
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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}
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void check_fsetpos(FILE *F) {
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errno = 0;
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fpos_t Pos;
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int Ret = fsetpos(F, &Pos);
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clang_analyzer_eval(F != NULL); // expected-warning {{TRUE}}
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if (Ret)
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clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
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else
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clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
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// expected-warning@-1{{FALSE}}
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if (errno) {} // no-warning
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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}
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void check_ftell(FILE *F) {
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errno = 0;
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long Ret = ftell(F);
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clang_analyzer_eval(F != NULL); // expected-warning {{TRUE}}
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if (Ret == -1) {
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clang_analyzer_eval(errno != 0); // expected-warning{{TRUE}}
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} else {
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clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
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// expected-warning@-1{{FALSE}}
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clang_analyzer_eval(Ret >= 0); // expected-warning{{TRUE}}
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}
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if (errno) {} // no-warning
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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}
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void test_rewind(FILE *F) {
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errno = 0;
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rewind(F);
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clang_analyzer_eval(F != NULL); // expected-warning{{TRUE}}
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clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
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// expected-warning@-1{{FALSE}}
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rewind(F);
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}
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void test_feof(FILE *F) {
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errno = 0;
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feof(F);
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clang_analyzer_eval(F != NULL); // expected-warning{{TRUE}}
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if (errno) {} // no-warning
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clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
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// expected-warning@-1{{FALSE}}
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}
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void test_ferror(FILE *F) {
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errno = 0;
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ferror(F);
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clang_analyzer_eval(F != NULL); // expected-warning{{TRUE}}
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if (errno) {} // no-warning
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clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
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// expected-warning@-1{{FALSE}}
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}
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void test_clearerr(FILE *F) {
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errno = 0;
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clearerr(F);
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clang_analyzer_eval(F != NULL); // expected-warning{{TRUE}}
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if (errno) {} // no-warning
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clang_analyzer_eval(errno == 0); // expected-warning{{TRUE}}
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// expected-warning@-1{{FALSE}}
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}
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void freadwrite_zerosize(FILE *F) {
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fwrite(WBuf, 1, 0, F);
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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fwrite(WBuf, 0, 1, F);
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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fread(RBuf, 1, 0, F);
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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fread(RBuf, 0, 1, F);
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clang_analyzer_eval(feof(F)); // expected-warning {{UNKNOWN}}
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clang_analyzer_eval(ferror(F)); // expected-warning {{UNKNOWN}}
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}
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void freadwrite_zerosize_errno(FILE *F, int A) {
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switch (A) {
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case 1:
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fwrite(WBuf, 1, 0, F);
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if (errno) {} // expected-warning{{undefined}}
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break;
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case 2:
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fwrite(WBuf, 0, 1, F);
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if (errno) {} // expected-warning{{undefined}}
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break;
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case 3:
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fread(RBuf, 1, 0, F);
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if (errno) {} // expected-warning{{undefined}}
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break;
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case 4:
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fread(RBuf, 0, 1, F);
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if (errno) {} // expected-warning{{undefined}}
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break;
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}
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}
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