8ef3f0fa5b
Summary: Adds iteration of all application memory in an efficient manner using shadow faults. Shadow memory starts out inaccessible and we mark it writable one page at a time on each fault when the instrumentation touches it. This allows iteration over just the mapped shadow memory, saving significant time. Adds a process-end iteration and pretty-printing of the final result. Adds a new test and updates the existing tests. Reviewers: aizatsky, filcab Subscribers: vitalybuka, zhaoqin, kcc, eugenis, llvm-commits, kubabrecka Differential Revision: http://reviews.llvm.org/D20578 llvm-svn: 271277
21 lines
630 B
C++
21 lines
630 B
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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#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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#include <string.h>
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int main(int argc, char **argv) {
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const int size = 128*1024*1024;
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char *p = (char *)mmap(0, size, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_PRIVATE, -1, 0);
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// Test the slowpath at different cache line boundaries.
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for (int i = 0; i < 630; i++)
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memset((char *)p + 63*i, i, 63*i);
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munmap(p, size);
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return 0;
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// CHECK: {{.*}} EfficiencySanitizer: the total working set size: 77 KB (12{{[0-9]+}} cache lines)
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}
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