e0ac46e69d
This reverts commit d618f1c3b12effd0c2bdb7d02108d3551f389d3d. This commit wasn't reviewed ahead of time and significant concerns were raised immediately after it landed. According to our developer policy this warrants immediate revert of the commit. https://llvm.org/docs/DeveloperPolicy.html#patch-reversion-policy Differential Revision: https://reviews.llvm.org/D155509
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
// RUN: %clang_analyze_cc1 -analyzer-checker=unix.Malloc -analyzer-inline-max-stack-depth=5 -verify %s
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#include "Inputs/system-header-simulator.h"
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void *malloc(size_t);
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void *valloc(size_t);
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void free(void *);
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void *realloc(void *ptr, size_t size);
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void *reallocf(void *ptr, size_t size);
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void *calloc(size_t nmemb, size_t size);
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void exit(int) __attribute__ ((__noreturn__));
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void *memcpy(void * restrict s1, const void * restrict s2, size_t n);
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size_t strlen(const char *);
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static void my_malloc1(void **d, size_t size) {
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*d = malloc(size);
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}
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static void *my_malloc2(int elevel, size_t size) {
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void *data;
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data = malloc(size);
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if (data == 0)
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exit(0);
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return data;
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}
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static void my_free1(void *p) {
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free(p);
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}
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static void test1(void) {
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void *data = 0;
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my_malloc1(&data, 4);
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} // expected-warning {{Potential leak of memory pointed to by 'data'}}
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static void test11(void) {
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void *data = 0;
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my_malloc1(&data, 4);
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my_free1(data);
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}
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static void testUniqueingByallocationSiteInTopLevelFunction(void) {
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void *data = my_malloc2(1, 4);
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data = 0;
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int x = 5;// expected-warning {{Potential leak of memory pointed to by 'data'}}
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data = my_malloc2(1, 4);
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} // expected-warning {{Potential leak of memory pointed to by 'data'}}
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static void test3(void) {
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void *data = my_malloc2(1, 4);
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free(data);
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data = my_malloc2(1, 4);
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free(data);
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}
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int test4(void) {
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int *data = (int*)my_malloc2(1, 4);
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my_free1(data);
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data = (int *)my_malloc2(1, 4);
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my_free1(data);
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return *data; // expected-warning {{Use of memory after it is freed}}
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}
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void test6(void) {
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int *data = (int *)my_malloc2(1, 4);
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my_free1((int*)data);
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my_free1((int*)data); // expected-warning{{Use of memory after it is freed}}
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}
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// TODO: We should warn here.
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void test5(void) {
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int *data;
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my_free1((int*)data);
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}
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static char *reshape(char *in) {
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return 0;
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}
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void testThatRemoveDeadBindingsRunBeforeEachCall(void) {
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char *v = malloc(12);
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v = reshape(v);
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v = reshape(v);// expected-warning {{Potential leak of memory pointed to by 'v'}}
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}
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// Test that we keep processing after 'return;'
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void fooWithEmptyReturn(int x) {
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if (x)
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return;
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x++;
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return;
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}
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int uafAndCallsFooWithEmptyReturn(void) {
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int *x = (int*)malloc(12);
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free(x);
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fooWithEmptyReturn(12);
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return *x; // expected-warning {{Use of memory after it is freed}}
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}
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// If we inline any of the malloc-family functions, the checker shouldn't also
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// try to do additional modeling. <rdar://problem/12317671>
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char *strndup(const char *str, size_t n) {
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if (!str)
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return 0;
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// DO NOT FIX. This is to test that we are actually using the inlined
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// behavior!
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if (n < 5)
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return 0;
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size_t length = strlen(str);
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if (length < n)
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n = length;
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char *result = malloc(n + 1);
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memcpy(result, str, n);
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result[n] = '\0';
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return result;
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}
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void useStrndup(size_t n) {
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if (n == 0) {
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(void)strndup(0, 20); // no-warning
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return;
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} else if (n < 5) {
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(void)strndup("hi there", n); // no-warning
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return;
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} else {
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(void)strndup("hi there", n);
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return; // expected-warning{{leak}}
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}
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}
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