forked from OSchip/llvm-project
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
// Test basic realloc functionality.
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// RUN: %clang_hwasan %s -o %t && %run %t
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// RUN: %clang_hwasan %s -DREALLOCARRAY -o %t && %run %t
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#include <assert.h>
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#include <sanitizer/hwasan_interface.h>
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#ifdef REALLOCARRAY
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extern "C" void *reallocarray(void *, size_t nmemb, size_t size);
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#define REALLOC(p, s) reallocarray(p, 1, s)
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#else
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#include <stdlib.h>
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#define REALLOC(p, s) realloc(p, s)
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#endif
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int main() {
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__hwasan_enable_allocator_tagging();
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char *x = (char*)REALLOC(nullptr, 4);
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x[0] = 10;
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x[1] = 20;
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x[2] = 30;
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x[3] = 40;
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char *x1 = (char*)REALLOC(x, 5);
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assert(x1 != x); // not necessary true for C,
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// but true today for hwasan.
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assert(x1[0] == 10 && x1[1] == 20 && x1[2] == 30 && x1[3] == 40);
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x1[4] = 50;
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char *x2 = (char*)REALLOC(x1, 6);
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x2[5] = 60;
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assert(x2 != x1);
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assert(x2[0] == 10 && x2[1] == 20 && x2[2] == 30 && x2[3] == 40 &&
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x2[4] == 50 && x2[5] == 60);
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char *x3 = (char*)REALLOC(x2, 6);
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assert(x3 != x2);
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assert(x3[0] == 10 && x3[1] == 20 && x3[2] == 30 && x3[3] == 40 &&
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x3[4] == 50 && x3[5] == 60);
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char *x4 = (char*)REALLOC(x3, 5);
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assert(x4 != x3);
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assert(x4[0] == 10 && x4[1] == 20 && x4[2] == 30 && x4[3] == 40 &&
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x4[4] == 50);
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}
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