forked from OSchip/llvm-project
119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
// RUN: %clang_analyze_cc1 -fblocks -verify %s -analyzer-store=region \
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// RUN: -analyzer-checker=core \
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// RUN: -analyzer-checker=unix.Malloc
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//
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// RUN: %clang_analyze_cc1 -fblocks -verify %s -analyzer-store=region \
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// RUN: -analyzer-checker=core \
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// RUN: -analyzer-checker=unix.Malloc \
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// RUN: -analyzer-config unix.DynamicMemoryModeling:Optimistic=true
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typedef __typeof(sizeof(int)) size_t;
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void free(void *);
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void *alloca(size_t);
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void t1 () {
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int a[] = { 1 };
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free(a);
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// expected-warning@-1{{Argument to free() is the address of the local variable 'a', which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object 'a'}}
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}
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void t2 () {
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int a = 1;
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free(&a);
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// expected-warning@-1{{Argument to free() is the address of the local variable 'a', which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object 'a'}}
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}
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void t3 () {
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static int a[] = { 1 };
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free(a);
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// expected-warning@-1{{Argument to free() is the address of the static variable 'a', which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object 'a'}}
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}
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void t4 (char *x) {
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free(x); // no-warning
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}
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void t5 () {
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extern char *ptr();
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free(ptr()); // no-warning
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}
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void t6 () {
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free((void*)1000);
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// expected-warning@-1{{Argument to free() is a constant address (1000), which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object '(void *)1000'}}
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}
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void t7 (char **x) {
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free(*x); // no-warning
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}
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void t8 (char **x) {
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// ugh
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free((*x)+8); // no-warning
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}
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void t9 () {
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label:
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free(&&label);
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// expected-warning@-1{{Argument to free() is the address of the label 'label', which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object 'label'}}
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}
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void t10 () {
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free((void*)&t10);
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// expected-warning@-1{{Argument to free() is the address of the function 't10', which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object 't10'}}
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}
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void t11 () {
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char *p = (char*)alloca(2);
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free(p); // expected-warning {{Memory allocated by alloca() should not be deallocated}}
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}
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void t12 () {
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char *p = (char*)__builtin_alloca(2);
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free(p); // expected-warning {{Memory allocated by alloca() should not be deallocated}}
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}
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void t13 () {
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free(^{return;});
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// expected-warning@-1{{Argument to free() is a block, which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object: block expression}}
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}
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void t14 (char a) {
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free(&a);
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// expected-warning@-1{{Argument to free() is the address of the parameter 'a', which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object 'a'}}
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}
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static int someGlobal[2];
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void t15 () {
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free(someGlobal);
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// expected-warning@-1{{Argument to free() is the address of the global variable 'someGlobal', which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object 'someGlobal'}}
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}
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void t16 (char **x, int offset) {
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// Unknown value
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free(x[offset]); // no-warning
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}
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int *iptr(void);
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void t17(void) {
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free(iptr); // Oops, forgot to call iptr().
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// expected-warning@-1{{Argument to free() is the address of the function 'iptr', which is not memory allocated by malloc()}}
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// expected-warning@-2{{attempt to call free on non-heap object 'iptr'}}
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}
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struct S {
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const char* p;
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};
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void t18 (struct S s) {
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free((void*)(unsigned long long)s.p); // no warning
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}
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