path: root/test/Analysis/malloc.c

// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.deadcode.UnreachableCode,alpha.core.CastSize,unix.Malloc,debug.ExprInspection -analyzer-store=region -verify %s

#include "Inputs/system-header-simulator.h"

void clang_analyzer_eval(int);

typedef __typeof(sizeof(int)) size_t;
void *malloc(size_t);
void *valloc(size_t);
void free(void *);
void *realloc(void *ptr, size_t size);
void *reallocf(void *ptr, size_t size);
void *calloc(size_t nmemb, size_t size);
char *strdup(const char *s);
char *strndup(const char *s, size_t n);

void myfoo(int *p);
void myfooint(int p);
char *fooRetPtr();

void f1() {
  int *p = malloc(12);
  return; // expected-warning{{Memory is never released; potential leak of memory pointed to by 'p'}}
}

void f2() {
  int *p = malloc(12);
  free(p);
  free(p); // expected-warning{{Attempt to free released memory}}
}

void f2_realloc_0() {
  int *p = malloc(12);
  realloc(p,0);
  realloc(p,0); // expected-warning{{Attempt to free released memory}}
}

void f2_realloc_1() {
  int *p = malloc(12);
  int *q = realloc(p,0); // no-warning
}

void reallocNotNullPtr(unsigned sizeIn) {
  unsigned size = 12;
  char *p = (char*)malloc(size);
  if (p) {
    char *q = (char*)realloc(p, sizeIn);
    char x = *q; // expected-warning {{Memory is never released; potential leak of memory pointed to by 'q'}}
  }
}

int *realloctest1() {
  int *q = malloc(12);
  q = realloc(q, 20);
  return q; // no warning - returning the allocated value
}

// p should be freed if realloc fails.
void reallocFails() {
  char *p = malloc(12);
  char *r = realloc(p, 12+1);
  if (!r) {
    free(p);
  } else {
    free(r);
  }
}

void reallocSizeZero1() {
  char *p = malloc(12);
  char *r = realloc(p, 0);
  if (!r) {
    free(p); // expected-warning {{Attempt to free released memory}}
  } else {
    free(r);
  }
}

void reallocSizeZero2() {
  char *p = malloc(12);
  char *r = realloc(p, 0);
  if (!r) {
    free(p); // expected-warning {{Attempt to free released memory}}
  } else {
    free(r);
  }
  free(p); // expected-warning {{Attempt to free released memory}}
}

void reallocSizeZero3() {
  char *p = malloc(12);
  char *r = realloc(p, 0);
  free(r);
}

void reallocSizeZero4() {
  char *r = realloc(0, 0);
  free(r);
}

void reallocSizeZero5() {
  char *r = realloc(0, 0);
}

void reallocPtrZero1() {
  char *r = realloc(0, 12);
} // expected-warning {{Memory is never released; potential leak of memory pointed to by 'r'}}

void reallocPtrZero2() {
  char *r = realloc(0, 12);
  if (r)
    free(r);
}

void reallocPtrZero3() {
  char *r = realloc(0, 12);
  free(r);
}

void reallocRadar6337483_1() {
    char *buf = malloc(100);
    buf = (char*)realloc(buf, 0x1000000);
    if (!buf) {
        return;