1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <string>
#include <atomic>
#include <stdint.h>
#include <mutex>
#include <map>
#include <vector>
/* please do NOT add PowerDNS specific includes/things to this file, we're trying
to make it useful for other projects as well! */
/* Goal: you can compile this in safely, but it won't do anything unless PDNS_TRACE_MEMORY is defined. */
class MallocTracer
{
public:
void* malloc (size_t size);
void free(void*);
uint64_t getAllocs(const std::string& = std::string()) const { return d_allocs; }
uint64_t getAllocFlux(const std::string& = std::string()) const { return d_allocflux; }
uint64_t getTotAllocated(const std::string& = std::string()) const { return d_totAllocated; }
uint64_t getNumOut() { std::lock_guard<std::mutex> lock(d_mut); return d_sizes.size(); }
struct AllocStats
{
int count;
std::map<unsigned int, unsigned int> sizes;
};
typedef std::vector<std::pair<MallocTracer::AllocStats,
std::vector<void*> > > allocators_t;
allocators_t topAllocators(int num=-1);
std::string topAllocatorsString(int num=-1);
void clearAllocators();
private:
static std::vector<void*> makeBacktrace();
std::atomic<uint64_t> d_allocs{0}, d_allocflux{0}, d_totAllocated{0};
std::map<std::vector<void*>, AllocStats> d_stats;
std::map<void*, size_t> d_sizes;
std::mutex d_mut;
};
extern MallocTracer* g_mtracer;
|
