// Test the behavior of malloc/calloc/realloc when the allocation size is huge.
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// By default (allocator_may_return_null=0) the process should crash.
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// With allocator_may_return_null=1 the allocator should return 0.
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//
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// RUN: %clangxx_msan -O0 %s -o %t
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// RUN: not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
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// RUN: MSAN_OPTIONS=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
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// RUN: MSAN_OPTIONS=allocator_may_return_null=1 %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mNULL
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// RUN: MSAN_OPTIONS=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cCRASH
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// RUN: MSAN_OPTIONS=allocator_may_return_null=1 %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cNULL
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// RUN: MSAN_OPTIONS=allocator_may_return_null=0 not %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coCRASH
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// RUN: MSAN_OPTIONS=allocator_may_return_null=1 %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coNULL
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// RUN: MSAN_OPTIONS=allocator_may_return_null=0 not %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rCRASH
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// RUN: MSAN_OPTIONS=allocator_may_return_null=1 %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rNULL
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// RUN: MSAN_OPTIONS=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrCRASH
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// RUN: MSAN_OPTIONS=allocator_may_return_null=1 %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrNULL
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <assert.h>
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#include <limits>
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int main(int argc, char **argv) {
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volatile size_t size = std::numeric_limits<size_t>::max() - 10000;
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assert(argc == 2);
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char *x = 0;
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if (!strcmp(argv[1], "malloc")) {
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fprintf(stderr, "malloc:\n");
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x = (char*)malloc(size);
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}
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if (!strcmp(argv[1], "calloc")) {
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fprintf(stderr, "calloc:\n");
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x = (char*)calloc(size / 4, 4);
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}
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if (!strcmp(argv[1], "calloc-overflow")) {
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fprintf(stderr, "calloc-overflow:\n");
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volatile size_t kMaxSizeT = std::numeric_limits<size_t>::max();
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size_t kArraySize = 4096;
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volatile size_t kArraySize2 = kMaxSizeT / kArraySize + 10;
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x = (char*)calloc(kArraySize, kArraySize2);
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}
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if (!strcmp(argv[1], "realloc")) {
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fprintf(stderr, "realloc:\n");
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x = (char*)realloc(0, size);
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}
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if (!strcmp(argv[1], "realloc-after-malloc")) {
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fprintf(stderr, "realloc-after-malloc:\n");
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char *t = (char*)malloc(100);
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*t = 42;
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x = (char*)realloc(t, size);
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assert(*t == 42);
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}
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// The NULL pointer is printed differently on different systems, while (long)0
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// is always the same.
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fprintf(stderr, "x: %lx\n", (long)x);
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return x != 0;
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}
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// CHECK-mCRASH: malloc:
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// CHECK-mCRASH: MemorySanitizer's allocator is terminating the process
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// CHECK-cCRASH: calloc:
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// CHECK-cCRASH: MemorySanitizer's allocator is terminating the process
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// CHECK-coCRASH: calloc-overflow:
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// CHECK-coCRASH: MemorySanitizer's allocator is terminating the process
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// CHECK-rCRASH: realloc:
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// CHECK-rCRASH: MemorySanitizer's allocator is terminating the process
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// CHECK-mrCRASH: realloc-after-malloc:
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// CHECK-mrCRASH: MemorySanitizer's allocator is terminating the process
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// CHECK-mNULL: malloc:
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// CHECK-mNULL: x: 0
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// CHECK-cNULL: calloc:
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// CHECK-cNULL: x: 0
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// CHECK-coNULL: calloc-overflow:
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// CHECK-coNULL: x: 0
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// CHECK-rNULL: realloc:
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// CHECK-rNULL: x: 0
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// CHECK-mrNULL: realloc-after-malloc:
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// CHECK-mrNULL: x: 0
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