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-rw-r--r--test/Analysis/casts.c247
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diff --git a/test/Analysis/casts.c b/test/Analysis/casts.c
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-// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -verify -analyzer-config eagerly-assume=false %s
-// RUN: %clang_analyze_cc1 -triple i386-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-store=region -verify -analyzer-config eagerly-assume=false %s
-// RUN: %clang_analyze_cc1 -triple x86_64-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -verify -DEAGERLY_ASSUME=1 -w %s
-// RUN: %clang_analyze_cc1 -triple i386-apple-darwin9 -analyzer-checker=core,alpha.core,debug.ExprInspection -verify -DEAGERLY_ASSUME=1 -DBIT32=1 -w %s
-
-extern void clang_analyzer_eval(_Bool);
-
-// Test if the 'storage' region gets properly initialized after it is cast to
-// 'struct sockaddr *'.
-
-typedef unsigned char __uint8_t;
-typedef unsigned int __uint32_t;
-typedef __uint32_t __darwin_socklen_t;
-typedef __uint8_t sa_family_t;
-typedef __darwin_socklen_t socklen_t;
-struct sockaddr { sa_family_t sa_family; };
-struct sockaddr_storage {};
-
-void getsockname();
-
-#ifndef EAGERLY_ASSUME
-
-void f(int sock) {
- struct sockaddr_storage storage;
- 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}}
- socklen_t addrlen = sizeof(storage);
- getsockname(sock, sockaddr, &addrlen);
- switch (sockaddr->sa_family) { // no-warning
- default:
- ;
- }
-}
-
-struct s {
- struct s *value;
-};
-
-void f1(struct s **pval) {
- int *tbool = ((void*)0);
- struct s *t = *pval;
- pval = &(t->value);
- tbool = (int *)pval; // use the cast-to type 'int *' to create element region.
- char c = (unsigned char) *tbool; // Should use cast-to type to create symbol.
- if (*tbool == -1) // here load the element region with the correct type 'int'
- (void)3;
-}
-
-void f2(const char *str) {
- unsigned char ch, cl, *p;
-
- p = (unsigned char *)str;
- ch = *p++; // use cast-to type 'unsigned char' to create element region.
- cl = *p++;
- if(!cl)
- cl = 'a';
-}
-
-// Test cast VariableSizeArray to pointer does not crash.
-void *memcpy(void *, void const *, unsigned long);
-typedef unsigned char Byte;
-void doit(char *data, int len) {
- if (len) {
- Byte buf[len];
- memcpy(buf, data, len);
- }
-}
-
-// PR 6013 and 6035 - Test that a cast of a pointer to long and then to int does not crash SValuator.
-void pr6013_6035_test(void *p) {
- unsigned int foo;
- foo = ((long)(p));
- (void) foo;
-}
-
-// PR12511 and radar://11215362 - Test that we support SymCastExpr, which represents symbolic int to float cast.
-char ttt(int intSeconds) {
- double seconds = intSeconds;
- if (seconds)
- return 0;
- return 0;
-}
-
-int foo (int* p) {
- int y = 0;
- if (p == 0) {
- if ((*((void**)&p)) == (void*)0) // Test that the cast to void preserves the symbolic region.
- return 0;
- else
- return 5/y; // This code should be unreachable: no-warning.
- }
- return 0;
-}
-
-void castsToBool() {
- clang_analyzer_eval(0); // expected-warning{{FALSE}}
- clang_analyzer_eval(0U); // expected-warning{{FALSE}}
- clang_analyzer_eval((void *)0); // expected-warning{{FALSE}}
-
- clang_analyzer_eval(1); // expected-warning{{TRUE}}
- clang_analyzer_eval(1U); // expected-warning{{TRUE}}
- clang_analyzer_eval(-1); // expected-warning{{TRUE}}
- clang_analyzer_eval(0x100); // expected-warning{{TRUE}}
- clang_analyzer_eval(0x100U); // expected-warning{{TRUE}}
- clang_analyzer_eval((void *)0x100); // expected-warning{{TRUE}}
-
- extern int symbolicInt;
- clang_analyzer_eval(symbolicInt); // expected-warning{{UNKNOWN}}
- if (symbolicInt)
- clang_analyzer_eval(symbolicInt); // expected-warning{{TRUE}}
-
- extern void *symbolicPointer;
- clang_analyzer_eval(symbolicPointer); // expected-warning{{UNKNOWN}}
- if (symbolicPointer)
- clang_analyzer_eval(symbolicPointer); // expected-warning{{TRUE}}
-
- int localInt;
- int* ptr = &localInt;
- clang_analyzer_eval(ptr); // expected-warning{{TRUE}}
- clang_analyzer_eval(&castsToBool); // expected-warning{{TRUE}}
- clang_analyzer_eval("abc"); // expected-warning{{TRUE}}
-
- extern float globalFloat;
- clang_analyzer_eval(globalFloat); // expected-warning{{UNKNOWN}}
-}
-
-void locAsIntegerCasts(void *p) {
- int x = (int) p;
- clang_analyzer_eval(++x < 10); // no-crash // expected-warning{{UNKNOWN}}
-}
-
-void multiDimensionalArrayPointerCasts() {
- static int x[10][10];
- int *y1 = &(x[3][5]);
- char *z = ((char *) y1) + 2;
- int *y2 = (int *)(z - 2);
- int *y3 = ((int *)x) + 35; // This is offset for [3][5].
-
- clang_analyzer_eval(y1 == y2); // expected-warning{{TRUE}}
-
- // FIXME: should be FALSE (i.e. equal pointers).
- clang_analyzer_eval(y1 - y2); // expected-warning{{UNKNOWN}}
- // FIXME: should be TRUE (i.e. same symbol).
- clang_analyzer_eval(*y1 == *y2); // expected-warning{{UNKNOWN}}
-
- clang_analyzer_eval(*((char *)y1) == *((char *) y2)); // expected-warning{{TRUE}}
-
- clang_analyzer_eval(y1 == y3); // expected-warning{{TRUE}}
-
- // FIXME: should be FALSE (i.e. equal pointers).
- clang_analyzer_eval(y1 - y3); // expected-warning{{UNKNOWN}}
- // FIXME: should be TRUE (i.e. same symbol).
- clang_analyzer_eval(*y1 == *y3); // expected-warning{{UNKNOWN}}
-
- clang_analyzer_eval(*((char *)y1) == *((char *) y3)); // expected-warning{{TRUE}}
-}
-
-void *getVoidPtr();
-
-void testCastVoidPtrToIntPtrThroughIntTypedAssignment() {
- int *x;
- (*((int *)(&x))) = (int)getVoidPtr();
- *x = 1; // no-crash
-}
-
-void testCastUIntPtrToIntPtrThroughIntTypedAssignment() {
- unsigned u;
- int *x;
- (*((int *)(&x))) = (int)&u;
- *x = 1;
- clang_analyzer_eval(u == 1); // expected-warning{{TRUE}}
-}
-
-void testCastVoidPtrToIntPtrThroughUIntTypedAssignment() {
- int *x;
- (*((int *)(&x))) = (int)(unsigned *)getVoidPtr();
- *x = 1; // no-crash
-}
-
-void testLocNonLocSymbolAssume(int a, int *b) {
- if ((int)b < a) {} // no-crash
-}
-
-void testLocNonLocSymbolRemainder(int a, int *b) {
- int c = ((int)b) % a;
- if (a == 1) {
- c += 1;
- }
-}
-
-void testSwitchWithSizeofs() {
- switch (sizeof(char) == 1) { // expected-warning{{switch condition has boolean value}}
- case sizeof(char):; // no-crash
- }
-}
-
-#endif
-
-#ifdef EAGERLY_ASSUME
-
-int globalA;
-extern int globalFunc();
-void no_crash_on_symsym_cast_to_long() {
- char c = globalFunc() - 5;
- c == 0;
- globalA -= c;
- globalA == 3;
- (long)globalA << 48;
- #ifdef BIT32
- // 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'}}
- #else
- // expected-no-diagnostics
- #endif
-}
-
-#endif
-
-char no_crash_SymbolCast_of_float_type_aux(int *p) {
- *p += 1;
- return *p;
-}
-
-void no_crash_SymbolCast_of_float_type() {
- extern float x;
- char (*f)() = no_crash_SymbolCast_of_float_type_aux;
- f(&x);
-}
-
-double no_crash_reinterpret_double_as_int(double a) {
- *(int *)&a = 1;
- return a * a;
-}
-
-double no_crash_reinterpret_double_as_ptr(double a) {
- *(void **)&a = 0;
- return a * a;
-}
-
-double no_crash_reinterpret_double_as_sym_int(double a, int b) {
- *(int *)&a = b;
- return a * a;
-}
-
-double no_crash_reinterpret_double_as_sym_ptr(double a, void * b) {
- *(void **)&a = b;
- return a * a;
-}
-
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