34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
// RUN: %clang_esan_wset -O0 %s -o %t 2>&1
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// RUN: %run %t 2>&1 | FileCheck %s
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// FIXME: Re-enable once PR33590 is fixed.
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// UNSUPPORTED: x86_64
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <assert.h>
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const int size = 0x1 << 25; // 523288 cache lines
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const int line_size = 64;
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int main(int argc, char **argv) {
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char *bufA = (char *)malloc(sizeof(char) * line_size);
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char bufB[64];
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char *bufC = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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bufA[0] = 0;
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// This additional access to the same line should not increase the line
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// count: but it's difficult to make a non-flaky test that measures the
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// lines down to the ones digit so right now we're not really testing that.
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// If we add a heap-only mode we may be able to be more precise.
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bufA[1] = 0;
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bufB[33] = 1;
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for (int i = 0; i < size; i += line_size)
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bufC[i] = 0;
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free(bufA);
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munmap(bufC, 0x4000);
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// CHECK: {{.*}} EfficiencySanitizer: the total working set size: 32 MB (524{{[0-9][0-9][0-9]}} cache lines)
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return 0;
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}
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