mem_trace.cc revision 12189:18937fe3cc31 
1/*
2 * Copyright (c) 2015 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Andreas Hansson
38 *          Andreas Sandberg
39 */
40
41#include "mem/probes/mem_trace.hh"
42
43#include "base/callback.hh"
44#include "base/output.hh"
45#include "params/MemTraceProbe.hh"
46#include "proto/packet.pb.h"
47
48MemTraceProbe::MemTraceProbe(MemTraceProbeParams *p)
49    : BaseMemProbe(p),
50      traceStream(nullptr),
51      withPC(p->with_pc)
52{
53    std::string filename;
54    if (p->trace_file != "") {
55        // If the trace file is not specified as an absolute path,
56        // append the current simulation output directory
57        filename = simout.resolve(p->trace_file);
58
59        const std::string suffix = ".gz";
60        // If trace_compress has been set, check the suffix. Append
61        // accordingly.
62        if (p->trace_compress &&
63            filename.compare(filename.size() - suffix.size(), suffix.size(),
64                             suffix) != 0)
65            filename = filename + suffix;
66    } else {
67        // Generate a filename from the name of the SimObject. Append .trc
68        // and .gz if we want compression enabled.
69        filename = simout.resolve(name() + ".trc" +
70                                  (p->trace_compress ? ".gz" : ""));
71    }
72
73    traceStream = new ProtoOutputStream(filename);
74
75    // Create a protobuf message for the header and write it to
76    // the stream
77    ProtoMessage::PacketHeader header_msg;
78    header_msg.set_obj_id(name());
79    header_msg.set_tick_freq(SimClock::Frequency);
80    traceStream->write(header_msg);
81
82    // Register a callback to compensate for the destructor not
83    // being called. The callback forces the stream to flush and
84    // closes the output file.
85    registerExitCallback(
86        new MakeCallback<MemTraceProbe, &MemTraceProbe::closeStreams>(this));
87}
88
89void
90MemTraceProbe::closeStreams()
91{
92    if (traceStream != NULL)
93        delete traceStream;
94}
95
96void
97MemTraceProbe::handleRequest(const ProbePoints::PacketInfo &pkt_info)
98{
99    ProtoMessage::Packet pkt_msg;
100
101    pkt_msg.set_tick(curTick());
102    pkt_msg.set_cmd(pkt_info.cmd.toInt());
103    pkt_msg.set_flags(pkt_info.flags);
104    pkt_msg.set_addr(pkt_info.addr);
105    pkt_msg.set_size(pkt_info.size);
106    if (withPC && pkt_info.pc != 0)
107        pkt_msg.set_pc(pkt_info.pc);
108    pkt_msg.set_pkt_id(pkt_info.master);
109
110    traceStream->write(pkt_msg);
111}
112
113
114MemTraceProbe *
115MemTraceProbeParams::create()
116{
117    return new MemTraceProbe(this);
118}
119