stacktrace.cc (5567:8fc3b004b0df) stacktrace.cc (6378:4a2ff62c3b4f)
1/*
2 * Copyright (c) 2004-2005 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;

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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;
43using namespace MipsISA;
44
1/*
2 * Copyright (c) 2004-2005 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;

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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;
43using namespace MipsISA;
44
45ProcessInfo::ProcessInfo(ThreadContext *_tc)
46 : tc(_tc)
47{
48// Addr addr = 0;
45ProcessInfo::ProcessInfo(ThreadContext *_tc) : tc(_tc)
46{}
49
47
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
75Addr
76ProcessInfo::task(Addr ksp) const
77{
78 Addr base = ksp & ~0x3fff;
79 if (base == ULL(0xfffffc0000000000))
80 return 0;
81
82 Addr tsk;

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135StackTrace::~StackTrace()
136{
137}
138
139void
140StackTrace::trace(ThreadContext *_tc, bool is_call)
141{
142 tc = _tc;
48Addr
49ProcessInfo::task(Addr ksp) const
50{
51 Addr base = ksp & ~0x3fff;
52 if (base == ULL(0xfffffc0000000000))
53 return 0;
54
55 Addr tsk;

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108StackTrace::~StackTrace()
109{
110}
111
112void
113StackTrace::trace(ThreadContext *_tc, bool is_call)
114{
115 tc = _tc;
143 /* FIXME - Jaidev - What is IPR_DTB_CM in Alpha? */
144 bool usermode = 0;
116 bool usermode = 0;
145 //(tc->readMiscReg(MipsISA::IPR_DTB_CM) & 0x18) != 0;
146
117
147// Addr pc = tc->readNextPC();
148// bool kernel = tc->getSystemPtr()->kernelStart <= pc &&
149// pc <= tc->getSystemPtr()->kernelEnd;
150
151 if (usermode) {
152 stack.push_back(user);
153 return;
154 }
118 if (usermode) {
119 stack.push_back(user);
120 return;
121 }
155
156// if (!kernel) {
157// stack.push_back(console);
158// return;
159// }
160
161// SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
162// Addr ksp = tc->readIntReg(MipsISA::StackPointerReg);
163// Addr bottom = ksp & ~0x3fff;
164// Addr addr;
165
166// if (is_call) {
167// if (!symtab->findNearestAddr(pc, addr))
168// panic("could not find address %#x", pc);
169
170// stack.push_back(addr);
171// pc = tc->readPC();
172// }
173
174// Addr ra;
175// int size;
176
177// while (ksp > bottom) {
178// if (!symtab->findNearestAddr(pc, addr))
179// panic("could not find symbol for pc=%#x", pc);
180// assert(pc >= addr && "symbol botch: callpc < func");
181
182// stack.push_back(addr);
183
184// if (isEntry(addr))
185// return;
186
187// if (decodePrologue(ksp, pc, addr, size, ra)) {
188// if (!ra)
189// return;
190
191// if (size <= 0) {
192// stack.push_back(unknown);
193// return;
194// }
195
196// pc = ra;
197// ksp += size;
198// } else {
199// stack.push_back(unknown);
200// return;
201// }
202
203// bool kernel = tc->getSystemPtr()->kernelStart <= pc &&
204// pc <= tc->getSystemPtr()->kernelEnd;
205// if (!kernel)
206// return;
207
208// if (stack.size() >= 1000)
209// panic("unwinding too far");
210// }
211
212// panic("unwinding too far");
213}
214
215bool
216StackTrace::isEntry(Addr addr)
217{
122}
123
124bool
125StackTrace::isEntry(Addr addr)
126{
218 /* if (addr == tc->readMiscReg(MipsISA::IPR_PALtemp2))
219 return true;*/
220
221 return false;
222}
223
224bool
225StackTrace::decodeStack(MachInst inst, int &disp)
226{
227 // lda $sp, -disp($sp)
228 //

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300
301 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
302 MachInst inst;
303 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst));
304
305 int reg, disp;
306 if (decodeStack(inst, disp)) {
307 if (size) {
127 return false;
128}
129
130bool
131StackTrace::decodeStack(MachInst inst, int &disp)
132{
133 // lda $sp, -disp($sp)
134 //

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206
207 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
208 MachInst inst;
209 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst));
210
211 int reg, disp;
212 if (decodeStack(inst, disp)) {
213 if (size) {
308 // panic("decoding frame size again");
309 return true;
310 }
311 size += disp;
312 } else if (decodeSave(inst, reg, disp)) {
313 if (!ra && reg == ReturnAddressReg) {
314 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr));
315 if (!ra) {
214 return true;
215 }
216 size += disp;
217 } else if (decodeSave(inst, reg, disp)) {
218 if (!ra && reg == ReturnAddressReg) {
219 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr));
220 if (!ra) {
316 // panic("no return address value pc=%#x\n", pc);
317 return false;
318 }
319 }
320 }
321 }
322
323 return true;
324}
325
326#if TRACING_ON
327void
328StackTrace::dump()
329{
221 return false;
222 }
223 }
224 }
225 }
226
227 return true;
228}
229
230#if TRACING_ON
231void
232StackTrace::dump()
233{
330 StringWrap name(tc->getCpuPtr()->name());
331// SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
332
333 DPRINTFN("------ Stack ------\n");
334
335// string symbol;
336// for (int i = 0, size = stack.size(); i < size; ++i) {
337// Addr addr = stack[size - i - 1];
338// if (addr == user)
339// symbol = "user";
340// else if (addr == console)
341// symbol = "console";
342// else if (addr == unknown)
343// symbol = "unknown";
344// else
345// symtab->findSymbol(addr, symbol);
346
347// DPRINTFN("%#x: %s\n", addr, symbol);
348// }
234 panic("Stack trace dump not implemented.\n");
349}
350#endif
235}
236#endif