forked from OSchip/llvm-project
248 lines
7.1 KiB
C
248 lines
7.1 KiB
C
// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -Wno-pointer-to-int-cast -verify -analyzer-config eagerly-assume=false %s
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// RUN: %clang_analyze_cc1 -triple i386-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -Wno-pointer-to-int-cast -verify -analyzer-config eagerly-assume=false %s
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// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -Wno-pointer-to-int-cast -verify -DEAGERLY_ASSUME=1 -w %s
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// RUN: %clang_analyze_cc1 -triple i386-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -Wno-pointer-to-int-cast -verify -DEAGERLY_ASSUME=1 -DBIT32=1 -w %s
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extern void clang_analyzer_eval(_Bool);
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// Test if the 'storage' region gets properly initialized after it is cast to
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// 'struct sockaddr *'.
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typedef unsigned char __uint8_t;
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typedef unsigned int __uint32_t;
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typedef __uint32_t __darwin_socklen_t;
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typedef __uint8_t sa_family_t;
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typedef __darwin_socklen_t socklen_t;
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struct sockaddr { sa_family_t sa_family; };
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struct sockaddr_storage {};
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void getsockname();
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#ifndef EAGERLY_ASSUME
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void f(int sock) {
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struct sockaddr_storage storage;
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struct sockaddr* sockaddr = (struct sockaddr*)&storage; // expected-warning{{Casting data to a larger structure type and accessing a field can lead to memory access errors or data corruption}}
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socklen_t addrlen = sizeof(storage);
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getsockname(sock, sockaddr, &addrlen);
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switch (sockaddr->sa_family) { // no-warning
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default:
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;
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}
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}
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struct s {
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struct s *value;
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};
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void f1(struct s **pval) {
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int *tbool = ((void*)0);
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struct s *t = *pval;
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pval = &(t->value);
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tbool = (int *)pval; // use the cast-to type 'int *' to create element region.
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char c = (unsigned char) *tbool; // Should use cast-to type to create symbol.
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if (*tbool == -1) // here load the element region with the correct type 'int'
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(void)3;
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}
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void f2(const char *str) {
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unsigned char ch, cl, *p;
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p = (unsigned char *)str;
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ch = *p++; // use cast-to type 'unsigned char' to create element region.
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cl = *p++;
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if(!cl)
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cl = 'a';
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}
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// Test cast VariableSizeArray to pointer does not crash.
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void *memcpy(void *, void const *, unsigned long);
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typedef unsigned char Byte;
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void doit(char *data, int len) {
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if (len) {
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Byte buf[len];
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memcpy(buf, data, len);
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}
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}
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// PR 6013 and 6035 - Test that a cast of a pointer to long and then to int does not crash SValuator.
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void pr6013_6035_test(void *p) {
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unsigned int foo;
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foo = ((long)(p));
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(void) foo;
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}
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// PR12511 and radar://11215362 - Test that we support SymCastExpr, which represents symbolic int to float cast.
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char ttt(int intSeconds) {
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double seconds = intSeconds;
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if (seconds)
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return 0;
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return 0;
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}
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int foo (int* p) {
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int y = 0;
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if (p == 0) {
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if ((*((void**)&p)) == (void*)0) // Test that the cast to void preserves the symbolic region.
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return 0;
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else
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return 5/y; // This code should be unreachable: no-warning.
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}
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return 0;
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}
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void castsToBool() {
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clang_analyzer_eval(0); // expected-warning{{FALSE}}
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clang_analyzer_eval(0U); // expected-warning{{FALSE}}
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clang_analyzer_eval((void *)0); // expected-warning{{FALSE}}
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clang_analyzer_eval(1); // expected-warning{{TRUE}}
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clang_analyzer_eval(1U); // expected-warning{{TRUE}}
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clang_analyzer_eval(-1); // expected-warning{{TRUE}}
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clang_analyzer_eval(0x100); // expected-warning{{TRUE}}
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clang_analyzer_eval(0x100U); // expected-warning{{TRUE}}
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clang_analyzer_eval((void *)0x100); // expected-warning{{TRUE}}
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extern int symbolicInt;
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clang_analyzer_eval(symbolicInt); // expected-warning{{UNKNOWN}}
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if (symbolicInt)
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clang_analyzer_eval(symbolicInt); // expected-warning{{TRUE}}
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extern void *symbolicPointer;
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clang_analyzer_eval(symbolicPointer); // expected-warning{{UNKNOWN}}
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if (symbolicPointer)
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clang_analyzer_eval(symbolicPointer); // expected-warning{{TRUE}}
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int localInt;
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int* ptr = &localInt;
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clang_analyzer_eval(ptr); // expected-warning{{TRUE}}
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clang_analyzer_eval(&castsToBool); // expected-warning{{TRUE}}
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clang_analyzer_eval("abc"); // expected-warning{{TRUE}}
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extern float globalFloat;
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clang_analyzer_eval(globalFloat); // expected-warning{{UNKNOWN}}
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}
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void locAsIntegerCasts(void *p) {
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int x = (int) p;
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clang_analyzer_eval(++x < 10); // no-crash // expected-warning{{UNKNOWN}}
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}
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void multiDimensionalArrayPointerCasts() {
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static int x[10][10];
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int *y1 = &(x[3][5]);
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char *z = ((char *) y1) + 2;
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int *y2 = (int *)(z - 2);
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int *y3 = ((int *)x) + 35; // This is offset for [3][5].
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clang_analyzer_eval(y1 == y2); // expected-warning{{TRUE}}
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// FIXME: should be FALSE (i.e. equal pointers).
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clang_analyzer_eval(y1 - y2); // expected-warning{{UNKNOWN}}
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// FIXME: should be TRUE (i.e. same symbol).
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clang_analyzer_eval(*y1 == *y2); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(*((char *)y1) == *((char *) y2)); // expected-warning{{TRUE}}
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clang_analyzer_eval(y1 == y3); // expected-warning{{TRUE}}
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// FIXME: should be FALSE (i.e. equal pointers).
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clang_analyzer_eval(y1 - y3); // expected-warning{{UNKNOWN}}
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// FIXME: should be TRUE (i.e. same symbol).
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clang_analyzer_eval(*y1 == *y3); // expected-warning{{UNKNOWN}}
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clang_analyzer_eval(*((char *)y1) == *((char *) y3)); // expected-warning{{TRUE}}
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}
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void *getVoidPtr();
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void testCastVoidPtrToIntPtrThroughIntTypedAssignment() {
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int *x;
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(*((int *)(&x))) = (int)getVoidPtr();
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*x = 1; // no-crash
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}
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void testCastUIntPtrToIntPtrThroughIntTypedAssignment() {
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unsigned u;
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int *x;
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(*((int *)(&x))) = (int)&u;
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*x = 1;
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clang_analyzer_eval(u == 1); // expected-warning{{TRUE}}
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}
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void testCastVoidPtrToIntPtrThroughUIntTypedAssignment() {
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int *x;
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(*((int *)(&x))) = (int)(unsigned *)getVoidPtr();
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*x = 1; // no-crash
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}
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void testLocNonLocSymbolAssume(int a, int *b) {
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if ((int)b < a) {} // no-crash
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}
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void testLocNonLocSymbolRemainder(int a, int *b) {
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int c = ((int)b) % a;
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if (a == 1) {
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c += 1;
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}
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}
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void testSwitchWithSizeofs() {
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switch (sizeof(char) == 1) { // expected-warning{{switch condition has boolean value}}
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case sizeof(char):; // no-crash
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}
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}
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#endif
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#ifdef EAGERLY_ASSUME
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int globalA;
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extern int globalFunc();
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void no_crash_on_symsym_cast_to_long() {
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char c = globalFunc() - 5;
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c == 0;
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globalA -= c;
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globalA == 3;
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(long)globalA << 48;
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#ifdef BIT32
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// expected-warning@-2{{The result of the left shift is undefined due to shifting by '48', which is greater or equal to the width of type 'long'}}
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#else
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// expected-no-diagnostics
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#endif
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}
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#endif
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char no_crash_SymbolCast_of_float_type_aux(int *p) {
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*p += 1;
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return *p;
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}
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void no_crash_SymbolCast_of_float_type() {
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extern float x;
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char (*f)() = no_crash_SymbolCast_of_float_type_aux;
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f(&x);
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}
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double no_crash_reinterpret_double_as_int(double a) {
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*(int *)&a = 1;
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return a * a;
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}
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double no_crash_reinterpret_double_as_ptr(double a) {
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*(void **)&a = 0;
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return a * a;
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}
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double no_crash_reinterpret_double_as_sym_int(double a, int b) {
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*(int *)&a = b;
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return a * a;
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}
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double no_crash_reinterpret_double_as_sym_ptr(double a, void * b) {
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*(void **)&a = b;
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return a * a;
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}
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