forked from OSchip/llvm-project
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -disable-free -analyzer-eagerly-assume -analyzer-checker=core,deadcode,alpha.security.taint,debug.TaintTest,debug.ExprInspection -verify %s
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void clang_analyzer_eval(int);
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// Note, we do need to include headers here, since the analyzer checks if the function declaration is located in a system header.
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#include "Inputs/system-header-simulator.h"
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// Test that system header does not invalidate the internal global.
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int size_rdar9373039 = 1;
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int rdar9373039() {
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int x;
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int j = 0;
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for (int i = 0 ; i < size_rdar9373039 ; ++i)
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x = 1;
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// strlen doesn't invalidate the value of 'size_rdar9373039'.
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int extra = (2 + strlen ("Clang") + ((4 - ((unsigned int) (2 + strlen ("Clang")) % 4)) % 4)) + (2 + strlen ("1.0") + ((4 - ((unsigned int) (2 + strlen ("1.0")) % 4)) % 4));
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for (int i = 0 ; i < size_rdar9373039 ; ++i)
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j += x; // no-warning
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return j;
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}
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// Test stdin does not get invalidated by a system call nor by an internal call.
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void foo();
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int stdinTest() {
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int i = 0;
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fscanf(stdin, "%d", &i);
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foo();
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int m = i; // expected-warning + {{tainted}}
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fscanf(stdin, "%d", &i);
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int j = i; // expected-warning + {{tainted}}
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return m + j; // expected-warning + {{tainted}}
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}
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// Test errno gets invalidated by a system call.
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int testErrnoSystem() {
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int i;
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int *p = 0;
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fscanf(stdin, "%d", &i);
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if (errno == 0) {
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fscanf(stdin, "%d", &i); // errno gets invalidated here.
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return 5 / errno; // no-warning
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}
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return 0;
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}
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// Test that errno gets invalidated by internal calls.
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int testErrnoInternal() {
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int i;
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int *p = 0;
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fscanf(stdin, "%d", &i);
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if (errno == 0) {
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foo(); // errno gets invalidated here.
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return 5 / errno; // no-warning
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}
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return 0;
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}
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// Test that const integer does not get invalidated.
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const int x = 0;
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int constIntGlob() {
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const int *m = &x;
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foo();
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return 3 / *m; // expected-warning {{Division by zero}}
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}
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extern const int y;
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int constIntGlobExtern() {
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if (y == 0) {
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foo();
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return 5 / y; // expected-warning {{Division by zero}}
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}
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return 0;
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}
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static void * const ptr = 0;
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void constPtrGlob() {
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clang_analyzer_eval(ptr == 0); // expected-warning{{TRUE}}
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foo();
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clang_analyzer_eval(ptr == 0); // expected-warning{{TRUE}}
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}
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static const int x2 = x;
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void constIntGlob2() {
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clang_analyzer_eval(x2 == 0); // expected-warning{{TRUE}}
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foo();
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clang_analyzer_eval(x2 == 0); // expected-warning{{TRUE}}
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}
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void testAnalyzerEvalIsPure() {
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extern int someGlobal;
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if (someGlobal == 0) {
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clang_analyzer_eval(someGlobal == 0); // expected-warning{{TRUE}}
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clang_analyzer_eval(someGlobal == 0); // expected-warning{{TRUE}}
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}
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}
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// Test that static variables with initializers do not get reinitialized on
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// recursive calls.
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void Function2(void);
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int *getPtr();
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void Function1(void) {
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static unsigned flag;
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static int *p = 0;
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if (!flag) {
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flag = 1;
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p = getPtr();
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}
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int m = *p; // no-warning: p is never null.
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m++;
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Function2();
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}
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void Function2(void) {
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Function1();
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}
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void SetToNonZero(void) {
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static int g = 5;
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clang_analyzer_eval(g == 5); // expected-warning{{TRUE}}
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}
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