debug.cc revision 11164 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 *          Steve Reinhardt
30 */
31
32#include <string>
33#include <vector>
34
35#include "base/debug.hh"
36#include "sim/debug.hh"
37#include "sim/eventq_impl.hh"
38#include "sim/global_event.hh"
39#include "sim/sim_events.hh"
40#include "sim/sim_exit.hh"
41#include "cpu/pc_event.hh"
42#include "sim/system.hh"
43
44using namespace std;
45
46//
47// Debug event: place a breakpoint on the process function and
48// schedule the event to break at a particular cycle
49//
50struct DebugBreakEvent : public GlobalEvent
51{
52    DebugBreakEvent(Tick when);
53    void process();     // process event
54    virtual const char *description() const;
55};
56
57//
58// constructor: schedule at specified time
59//
60DebugBreakEvent::DebugBreakEvent(Tick when)
61    : GlobalEvent(when, Debug_Break_Pri, AutoDelete)
62{
63}
64
65//
66// handle debug event: set debugger breakpoint on this function
67//
68void
69DebugBreakEvent::process()
70{
71    Debug::breakpoint();
72}
73
74
75const char *
76DebugBreakEvent::description() const
77{
78    return "debug breakpoint";
79}
80
81//
82// handy function to schedule DebugBreakEvent on main event queue
83// (callable from debugger)
84//
85void
86schedBreak(Tick when)
87{
88    new DebugBreakEvent(when);
89    warn("need to stop all queues");
90}
91
92void
93schedRelBreak(Tick delta)
94{
95    schedBreak(curTick() + delta);
96}
97
98void
99breakAtKernelFunction(const char* funcName)
100{
101    System* curSystem = System::systemList[0];
102    curSystem->addKernelFuncEvent<BreakPCEvent>(funcName,
103                                                "GDB scheduled break", true);
104}
105
106///
107/// Function to cause the simulator to take a checkpoint from the debugger
108///
109void
110takeCheckpoint(Tick when)
111{
112    if (!when)
113        when = curTick() + 1;
114    exitSimLoop("checkpoint", 0, when, 0);
115}
116
117void
118eventqDump()
119{
120    for (uint32_t i = 0; i < numMainEventQueues; ++i) {
121        mainEventQueue[i]->dump();
122    }
123}
124
125int remote_gdb_base_port = 7000;
126
127int
128getRemoteGDBPort()
129{
130    return remote_gdb_base_port;
131}
132
133// Set remote GDB base port.  0 means disable remote GDB.
134// Callable from python.
135void
136setRemoteGDBPort(int port)
137{
138    remote_gdb_base_port = port;
139}
140
141