stacktrace.cc (5087:b332ea3bc5e6) stacktrace.cc (5499:8bfc7650c344)
1/*
2 * Copyright (c) 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 */
30
31#include <string>
32
33#include "arch/x86/isa_traits.hh"
34#include "arch/x86/stacktrace.hh"
35#include "arch/x86/vtophys.hh"
36#include "base/bitfield.hh"
37#include "base/trace.hh"
38#include "cpu/base.hh"
39#include "cpu/thread_context.hh"
40#include "sim/system.hh"
41
42using namespace std;
43namespace X86ISA
44{
45 ProcessInfo::ProcessInfo(ThreadContext *_tc)
46 : tc(_tc)
47 {
48 Addr addr = 0;
49
50 VirtualPort *vp;
51
52 vp = tc->getVirtPort();
53
54 if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_size", addr))
55 panic("thread info not compiled into kernel\n");
56 thread_info_size = vp->readGtoH<int32_t>(addr);
57
58 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_size", addr))
59 panic("thread info not compiled into kernel\n");
60 task_struct_size = vp->readGtoH<int32_t>(addr);
61
62 if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_task", addr))
63 panic("thread info not compiled into kernel\n");
64 task_off = vp->readGtoH<int32_t>(addr);
65
66 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_pid", addr))
67 panic("thread info not compiled into kernel\n");
68 pid_off = vp->readGtoH<int32_t>(addr);
69
70 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_comm", addr))
71 panic("thread info not compiled into kernel\n");
72 name_off = vp->readGtoH<int32_t>(addr);
1/*
2 * Copyright (c) 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 */
30
31#include <string>
32
33#include "arch/x86/isa_traits.hh"
34#include "arch/x86/stacktrace.hh"
35#include "arch/x86/vtophys.hh"
36#include "base/bitfield.hh"
37#include "base/trace.hh"
38#include "cpu/base.hh"
39#include "cpu/thread_context.hh"
40#include "sim/system.hh"
41
42using namespace std;
43namespace X86ISA
44{
45 ProcessInfo::ProcessInfo(ThreadContext *_tc)
46 : tc(_tc)
47 {
48 Addr addr = 0;
49
50 VirtualPort *vp;
51
52 vp = tc->getVirtPort();
53
54 if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_size", addr))
55 panic("thread info not compiled into kernel\n");
56 thread_info_size = vp->readGtoH<int32_t>(addr);
57
58 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_size", addr))
59 panic("thread info not compiled into kernel\n");
60 task_struct_size = vp->readGtoH<int32_t>(addr);
61
62 if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_task", addr))
63 panic("thread info not compiled into kernel\n");
64 task_off = vp->readGtoH<int32_t>(addr);
65
66 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_pid", addr))
67 panic("thread info not compiled into kernel\n");
68 pid_off = vp->readGtoH<int32_t>(addr);
69
70 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_comm", addr))
71 panic("thread info not compiled into kernel\n");
72 name_off = vp->readGtoH<int32_t>(addr);
73
74 tc->delVirtPort(vp);
75 }
76
77 Addr
78 ProcessInfo::task(Addr ksp) const
79 {
80 Addr base = ksp & ~0x3fff;
81 if (base == ULL(0xfffffc0000000000))
82 return 0;
83
84 Addr tsk;
85
86 VirtualPort *vp;
87
88 vp = tc->getVirtPort();
89 tsk = vp->readGtoH<Addr>(base + task_off);
73 }
74
75 Addr
76 ProcessInfo::task(Addr ksp) const
77 {
78 Addr base = ksp & ~0x3fff;
79 if (base == ULL(0xfffffc0000000000))
80 return 0;
81
82 Addr tsk;
83
84 VirtualPort *vp;
85
86 vp = tc->getVirtPort();
87 tsk = vp->readGtoH<Addr>(base + task_off);
90 tc->delVirtPort(vp);
91
92 return tsk;
93 }
94
95 int
96 ProcessInfo::pid(Addr ksp) const
97 {
98 Addr task = this->task(ksp);
99 if (!task)
100 return -1;
101
102 uint16_t pd;
103
104 VirtualPort *vp;
105
106 vp = tc->getVirtPort();
107 pd = vp->readGtoH<uint16_t>(task + pid_off);
88
89 return tsk;
90 }
91
92 int
93 ProcessInfo::pid(Addr ksp) const
94 {
95 Addr task = this->task(ksp);
96 if (!task)
97 return -1;
98
99 uint16_t pd;
100
101 VirtualPort *vp;
102
103 vp = tc->getVirtPort();
104 pd = vp->readGtoH<uint16_t>(task + pid_off);
108 tc->delVirtPort(vp);
109
110 return pd;
111 }
112
113 string
114 ProcessInfo::name(Addr ksp) const
115 {
116 Addr task = this->task(ksp);
117 if (!task)
118 return "console";
119
120 char comm[256];
121 CopyStringOut(tc, comm, task + name_off, sizeof(comm));
122 if (!comm[0])
123 return "startup";
124
125 return comm;
126 }
127
128 StackTrace::StackTrace()
129 : tc(0), stack(64)
130 {
131 }
132
133 StackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst)
134 : tc(0), stack(64)
135 {
136 trace(_tc, inst);
137 }
138
139 StackTrace::~StackTrace()
140 {
141 }
142
143 void
144 StackTrace::trace(ThreadContext *_tc, bool is_call)
145 {
146 }
147
148 bool
149 StackTrace::isEntry(Addr addr)
150 {
151 return false;
152 }
153
154 bool
155 StackTrace::decodeStack(MachInst inst, int &disp)
156 {
157 disp = 0;
158 return true;
159 }
160
161 bool
162 StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
163 {
164 reg = 0;
165 disp = 0;
166 return true;
167 }
168
169 /*
170 * Decode the function prologue for the function we're in, and note
171 * which registers are stored where, and how large the stack frame is.
172 */
173 bool
174 StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
175 int &size, Addr &ra)
176 {
177 size = 0;
178 ra = 0;
179
180 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
181 MachInst inst;
182 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst));
183
184 int reg, disp;
185 if (decodeStack(inst, disp)) {
186 if (size) {
187 // panic("decoding frame size again");
188 return true;
189 }
190 size += disp;
191 } else if (decodeSave(inst, reg, disp)) {
192 if (!ra && reg == ReturnAddressReg) {
193 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr));
194 if (!ra) {
195 // panic("no return address value pc=%#x\n", pc);
196 return false;
197 }
198 }
199 }
200 }
201
202 return true;
203 }
204
205#if TRACING_ON
206 void
207 StackTrace::dump()
208 {
209 StringWrap name(tc->getCpuPtr()->name());
210 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
211
212 DPRINTFN("------ Stack ------\n");
213
214 string symbol;
215 for (int i = 0, size = stack.size(); i < size; ++i) {
216 Addr addr = stack[size - i - 1];
217 if (addr == user)
218 symbol = "user";
219 else if (addr == console)
220 symbol = "console";
221 else if (addr == unknown)
222 symbol = "unknown";
223 else
224 symtab->findSymbol(addr, symbol);
225
226 DPRINTFN("%#x: %s\n", addr, symbol);
227 }
228 }
229#endif
230}
105
106 return pd;
107 }
108
109 string
110 ProcessInfo::name(Addr ksp) const
111 {
112 Addr task = this->task(ksp);
113 if (!task)
114 return "console";
115
116 char comm[256];
117 CopyStringOut(tc, comm, task + name_off, sizeof(comm));
118 if (!comm[0])
119 return "startup";
120
121 return comm;
122 }
123
124 StackTrace::StackTrace()
125 : tc(0), stack(64)
126 {
127 }
128
129 StackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst)
130 : tc(0), stack(64)
131 {
132 trace(_tc, inst);
133 }
134
135 StackTrace::~StackTrace()
136 {
137 }
138
139 void
140 StackTrace::trace(ThreadContext *_tc, bool is_call)
141 {
142 }
143
144 bool
145 StackTrace::isEntry(Addr addr)
146 {
147 return false;
148 }
149
150 bool
151 StackTrace::decodeStack(MachInst inst, int &disp)
152 {
153 disp = 0;
154 return true;
155 }
156
157 bool
158 StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
159 {
160 reg = 0;
161 disp = 0;
162 return true;
163 }
164
165 /*
166 * Decode the function prologue for the function we're in, and note
167 * which registers are stored where, and how large the stack frame is.
168 */
169 bool
170 StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
171 int &size, Addr &ra)
172 {
173 size = 0;
174 ra = 0;
175
176 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
177 MachInst inst;
178 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst));
179
180 int reg, disp;
181 if (decodeStack(inst, disp)) {
182 if (size) {
183 // panic("decoding frame size again");
184 return true;
185 }
186 size += disp;
187 } else if (decodeSave(inst, reg, disp)) {
188 if (!ra && reg == ReturnAddressReg) {
189 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr));
190 if (!ra) {
191 // panic("no return address value pc=%#x\n", pc);
192 return false;
193 }
194 }
195 }
196 }
197
198 return true;
199 }
200
201#if TRACING_ON
202 void
203 StackTrace::dump()
204 {
205 StringWrap name(tc->getCpuPtr()->name());
206 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
207
208 DPRINTFN("------ Stack ------\n");
209
210 string symbol;
211 for (int i = 0, size = stack.size(); i < size; ++i) {
212 Addr addr = stack[size - i - 1];
213 if (addr == user)
214 symbol = "user";
215 else if (addr == console)
216 symbol = "console";
217 else if (addr == unknown)
218 symbol = "unknown";
219 else
220 symtab->findSymbol(addr, symbol);
221
222 DPRINTFN("%#x: %s\n", addr, symbol);
223 }
224 }
225#endif
226}