07814769a8
Summary: Adds support for creating a separate thread for performing "sideline" actions on a periodic basis via an itimer. A new class SidelineThread implements this feature, exposing a sampling callback to the caller. Adds initial usage of sideline sampling to the working set tool. For now it simply prints the usage at each snapshot at verbosity level 1. Adds a test of this behavior. Adds a new option -record_snapshots to control whether we sample and a new option -sample_freq to control the periodicity of the sampling. Reviewers: aizatsky Subscribers: vitalybuka, zhaoqin, kcc, eugenis, llvm-commits, kubabrecka Differential Revision: http://reviews.llvm.org/D20751 llvm-svn: 271682
62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
// RUN: %clangxx_unit -O0 %s -o %t 2>&1
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// RUN: %env_esan_opts="record_snapshots=0" %run %t 2>&1 | FileCheck %s
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#include "esan/esan_circular_buffer.h"
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#include "sanitizer_common/sanitizer_placement_new.h"
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#include <assert.h>
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#include <stdio.h>
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static const int TestBufCapacity = 4;
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// The buffer should have a capacity of TestBufCapacity.
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void testBuffer(__esan::CircularBuffer<int> *Buf) {
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assert(Buf->size() == 0);
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assert(Buf->empty());
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Buf->push_back(1);
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assert(Buf->back() == 1);
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assert((*Buf)[0] == 1);
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assert(Buf->size() == 1);
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assert(!Buf->empty());
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Buf->push_back(2);
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Buf->push_back(3);
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Buf->push_back(4);
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Buf->push_back(5);
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assert((*Buf)[0] == 2);
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assert(Buf->size() == 4);
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Buf->pop_back();
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assert((*Buf)[0] == 2);
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assert(Buf->size() == 3);
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Buf->pop_back();
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Buf->pop_back();
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assert((*Buf)[0] == 2);
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assert(Buf->size() == 1);
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assert(!Buf->empty());
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Buf->pop_back();
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assert(Buf->empty());
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}
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int main()
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{
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// Test initialize/free.
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__esan::CircularBuffer<int> GlobalBuf;
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GlobalBuf.initialize(TestBufCapacity);
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testBuffer(&GlobalBuf);
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GlobalBuf.free();
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// Test constructor/free.
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__esan::CircularBuffer<int> *LocalBuf;
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static char placeholder[sizeof(*LocalBuf)];
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LocalBuf = new(placeholder) __esan::CircularBuffer<int>(TestBufCapacity);
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testBuffer(LocalBuf);
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LocalBuf->free();
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fprintf(stderr, "All checks passed.\n");
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// CHECK: All checks passed.
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return 0;
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}
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