stacktrace.cc (5568:d14250d688d2) stacktrace.cc (5569:baeee670d4ce)
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;

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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;
43
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;

--- 27 unchanged lines hidden (view full) ---

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;
43
44namespace AlphaISA
44namespace AlphaISA {
45
46ProcessInfo::ProcessInfo(ThreadContext *_tc)
47 : tc(_tc)
45{
48{
46 ProcessInfo::ProcessInfo(ThreadContext *_tc)
47 : tc(_tc)
48 {
49 Addr addr = 0;
49 Addr addr = 0;
50 VirtualPort *vp = tc->getVirtPort();
51 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
50
52
51 VirtualPort *vp;
53 if (!symtab->findAddress("thread_info_size", addr))
54 panic("thread info not compiled into kernel\n");
55 thread_info_size = vp->readGtoH<int32_t>(addr);
52
56
53 vp = tc->getVirtPort();
57 if (!symtab->findAddress("task_struct_size", addr))
58 panic("thread info not compiled into kernel\n");
59 task_struct_size = vp->readGtoH<int32_t>(addr);
54
60
55 if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_size", addr))
56 panic("thread info not compiled into kernel\n");
57 thread_info_size = vp->readGtoH<int32_t>(addr);
61 if (!symtab->findAddress("thread_info_task", addr))
62 panic("thread info not compiled into kernel\n");
63 task_off = vp->readGtoH<int32_t>(addr);
58
64
59 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_size", addr))
60 panic("thread info not compiled into kernel\n");
61 task_struct_size = vp->readGtoH<int32_t>(addr);
65 if (!symtab->findAddress("task_struct_pid", addr))
66 panic("thread info not compiled into kernel\n");
67 pid_off = vp->readGtoH<int32_t>(addr);
62
68
63 if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_task", addr))
64 panic("thread info not compiled into kernel\n");
65 task_off = vp->readGtoH<int32_t>(addr);
69 if (!symtab->findAddress("task_struct_comm", addr))
70 panic("thread info not compiled into kernel\n");
71 name_off = vp->readGtoH<int32_t>(addr);
72}
66
73
67 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_pid", addr))
68 panic("thread info not compiled into kernel\n");
69 pid_off = vp->readGtoH<int32_t>(addr);
74Addr
75ProcessInfo::task(Addr ksp) const
76{
77 Addr base = ksp & ~0x3fff;
78 if (base == ULL(0xfffffc0000000000))
79 return 0;
70
80
71 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_comm", addr))
72 panic("thread info not compiled into kernel\n");
73 name_off = vp->readGtoH<int32_t>(addr);
74 }
81 Addr tsk;
75
82
76 Addr
77 ProcessInfo::task(Addr ksp) const
78 {
79 Addr base = ksp & ~0x3fff;
80 if (base == ULL(0xfffffc0000000000))
81 return 0;
83 VirtualPort *vp;
82
84
83 Addr tsk;
85 vp = tc->getVirtPort();
86 tsk = vp->readGtoH<Addr>(base + task_off);
84
87
85 VirtualPort *vp;
88 return tsk;
89}
86
90
87 vp = tc->getVirtPort();
88 tsk = vp->readGtoH<Addr>(base + task_off);
91int
92ProcessInfo::pid(Addr ksp) const
93{
94 Addr task = this->task(ksp);
95 if (!task)
96 return -1;
89
97
90 return tsk;
91 }
98 uint16_t pd;
92
99
93 int
94 ProcessInfo::pid(Addr ksp) const
95 {
96 Addr task = this->task(ksp);
97 if (!task)
98 return -1;
100 VirtualPort *vp;
99
101
100 uint16_t pd;
102 vp = tc->getVirtPort();
103 pd = vp->readGtoH<uint16_t>(task + pid_off);
101
104
102 VirtualPort *vp;
105 return pd;
106}
103
107
104 vp = tc->getVirtPort();
105 pd = vp->readGtoH<uint16_t>(task + pid_off);
108string
109ProcessInfo::name(Addr ksp) const
110{
111 Addr task = this->task(ksp);
112 if (!task)
113 return "console";
106
114
107 return pd;
108 }
115 char comm[256];
116 CopyStringOut(tc, comm, task + name_off, sizeof(comm));
117 if (!comm[0])
118 return "startup";
109
119
110 string
111 ProcessInfo::name(Addr ksp) const
112 {
113 Addr task = this->task(ksp);
114 if (!task)
115 return "console";
120 return comm;
121}
116
122
117 char comm[256];
118 CopyStringOut(tc, comm, task + name_off, sizeof(comm));
119 if (!comm[0])
120 return "startup";
123StackTrace::StackTrace()
124 : tc(0), stack(64)
125{
126}
121
127
122 return comm;
123 }
128StackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst)
129 : tc(0), stack(64)
130{
131 trace(_tc, inst);
132}
124
133
125 StackTrace::StackTrace()
126 : tc(0), stack(64)
127 {
128 }
134StackTrace::~StackTrace()
135{
136}
129
137
130 StackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst)
131 : tc(0), stack(64)
132 {
133 trace(_tc, inst);
134 }
138void
139StackTrace::trace(ThreadContext *_tc, bool is_call)
140{
141 tc = _tc;
135
142
136 StackTrace::~StackTrace()
137 {
138 }
143 System *sys = tc->getSystemPtr();
139
144
140 void
141 StackTrace::trace(ThreadContext *_tc, bool is_call)
142 {
143 tc = _tc;
145 bool usermode =
146 (tc->readMiscRegNoEffect(IPR_DTB_CM) & 0x18) != 0;
144
147
145 bool usermode = (tc->readMiscRegNoEffect(IPR_DTB_CM) & 0x18) != 0;
148 Addr pc = tc->readNextPC();
149 bool kernel = sys->kernelStart <= pc && pc <= sys->kernelEnd;
146
150
147 Addr pc = tc->readNextPC();
148 bool kernel = tc->getSystemPtr()->kernelStart <= pc &&
149 pc <= tc->getSystemPtr()->kernelEnd;
151 if (usermode) {
152 stack.push_back(user);
153 return;
154 }
150
155
151 if (usermode) {
152 stack.push_back(user);
153 return;
154 }
156 if (!kernel) {
157 stack.push_back(console);
158 return;
159 }
155
160
156 if (!kernel) {
157 stack.push_back(console);
158 return;
159 }
161 SymbolTable *symtab = sys->kernelSymtab;
162 Addr ksp = tc->readIntReg(StackPointerReg);
163 Addr bottom = ksp & ~0x3fff;
160
164
161 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
162 Addr ksp = tc->readIntReg(StackPointerReg);
163 Addr bottom = ksp & ~0x3fff;
165 if (is_call) {
164 Addr addr;
166 Addr addr;
167 if (!symtab->findNearestAddr(pc, addr))
168 panic("could not find address %#x", pc);
165
169
166 if (is_call) {
167 if (!symtab->findNearestAddr(pc, addr))
168 panic("could not find address %#x", pc);
170 stack.push_back(addr);
171 pc = tc->readPC();
172 }
169
173
170 stack.push_back(addr);
171 pc = tc->readPC();
172 }
174 while (ksp > bottom) {
175 Addr addr;
176 if (!symtab->findNearestAddr(pc, addr))
177 panic("could not find symbol for pc=%#x", pc);
178 assert(pc >= addr && "symbol botch: callpc < func");
173
179
174 Addr ra;
175 int size;
180 stack.push_back(addr);
176
181
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");
182 if (isEntry(addr))
183 return;
181
184
182 stack.push_back(addr);
183
184 if (isEntry(addr))
185 Addr ra;
186 int size;
187 if (decodePrologue(ksp, pc, addr, size, ra)) {
188 if (!ra)
185 return;
186
189 return;
190
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 {
191 if (size <= 0) {
199 stack.push_back(unknown);
200 return;
201 }
202
192 stack.push_back(unknown);
193 return;
194 }
195
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");
196 pc = ra;
197 ksp += size;
198 } else {
199 stack.push_back(unknown);
200 return;
210 }
211
201 }
202
212 panic("unwinding too far");
203 bool kernel = sys->kernelStart <= pc && pc <= sys->kernelEnd;
204 if (!kernel)
205 return;
206
207 if (stack.size() >= 1000)
208 panic("unwinding too far");
213 }
214
209 }
210
215 bool
216 StackTrace::isEntry(Addr addr)
217 {
218 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp12))
219 return true;
211 panic("unwinding too far");
212}
220
213
221 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp7))
222 return true;
214bool
215StackTrace::isEntry(Addr addr)
216{
217 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp12))
218 return true;
223
219
224 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp11))
225 return true;
220 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp7))
221 return true;
226
222
227 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp21))
228 return true;
223 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp11))
224 return true;
229
225
230 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp9))
231 return true;
226 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp21))
227 return true;
232
228
233 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp2))
234 return true;
229 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp9))
230 return true;
235
231
236 return false;
237 }
232 if (addr == tc->readMiscRegNoEffect(IPR_PALtemp2))
233 return true;
238
234
239 bool
240 StackTrace::decodeStack(MachInst inst, int &disp)
241 {
242 // lda $sp, -disp($sp)
243 //
244 // Opcode<31:26> == 0x08
245 // RA<25:21> == 30
246 // RB<20:16> == 30
247 // Disp<15:0>
248 const MachInst mem_mask = 0xffff0000;
249 const MachInst lda_pattern = 0x23de0000;
250 const MachInst lda_disp_mask = 0x0000ffff;
235 return false;
236}
251
237
252 // subq $sp, disp, $sp
253 // addq $sp, disp, $sp
254 //
255 // Opcode<31:26> == 0x10
256 // RA<25:21> == 30
257 // Lit<20:13>
258 // One<12> = 1
259 // Func<11:5> == 0x20 (addq)
260 // Func<11:5> == 0x29 (subq)
261 // RC<4:0> == 30
262 const MachInst intop_mask = 0xffe01fff;
263 const MachInst addq_pattern = 0x43c0141e;
264 const MachInst subq_pattern = 0x43c0153e;
265 const MachInst intop_disp_mask = 0x001fe000;
266 const int intop_disp_shift = 13;
238bool
239StackTrace::decodeStack(MachInst inst, int &disp)
240{
241 // lda $sp, -disp($sp)
242 //
243 // Opcode<31:26> == 0x08
244 // RA<25:21> == 30
245 // RB<20:16> == 30
246 // Disp<15:0>
247 const MachInst mem_mask = 0xffff0000;
248 const MachInst lda_pattern = 0x23de0000;
249 const MachInst lda_disp_mask = 0x0000ffff;
267
250
268 if ((inst & mem_mask) == lda_pattern)
269 disp = -sext<16>(inst & lda_disp_mask);
270 else if ((inst & intop_mask) == addq_pattern)
271 disp = -int((inst & intop_disp_mask) >> intop_disp_shift);
272 else if ((inst & intop_mask) == subq_pattern)
273 disp = int((inst & intop_disp_mask) >> intop_disp_shift);
274 else
275 return false;
251 // subq $sp, disp, $sp
252 // addq $sp, disp, $sp
253 //
254 // Opcode<31:26> == 0x10
255 // RA<25:21> == 30
256 // Lit<20:13>
257 // One<12> = 1
258 // Func<11:5> == 0x20 (addq)
259 // Func<11:5> == 0x29 (subq)
260 // RC<4:0> == 30
261 const MachInst intop_mask = 0xffe01fff;
262 const MachInst addq_pattern = 0x43c0141e;
263 const MachInst subq_pattern = 0x43c0153e;
264 const MachInst intop_disp_mask = 0x001fe000;
265 const int intop_disp_shift = 13;
276
266
277 return true;
278 }
267 if ((inst & mem_mask) == lda_pattern)
268 disp = -sext<16>(inst & lda_disp_mask);
269 else if ((inst & intop_mask) == addq_pattern)
270 disp = -int((inst & intop_disp_mask) >> intop_disp_shift);
271 else if ((inst & intop_mask) == subq_pattern)
272 disp = int((inst & intop_disp_mask) >> intop_disp_shift);
273 else
274 return false;
279
275
280 bool
281 StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
282 {
283 // lda $stq, disp($sp)
284 //
285 // Opcode<31:26> == 0x08
286 // RA<25:21> == ?
287 // RB<20:16> == 30
288 // Disp<15:0>
289 const MachInst stq_mask = 0xfc1f0000;
290 const MachInst stq_pattern = 0xb41e0000;
291 const MachInst stq_disp_mask = 0x0000ffff;
292 const MachInst reg_mask = 0x03e00000;
293 const int reg_shift = 21;
276 return true;
277}
294
278
295 if ((inst & stq_mask) == stq_pattern) {
296 reg = (inst & reg_mask) >> reg_shift;
297 disp = sext<16>(inst & stq_disp_mask);
298 } else {
299 return false;
300 }
279bool
280StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
281{
282 // lda $stq, disp($sp)
283 //
284 // Opcode<31:26> == 0x08
285 // RA<25:21> == ?
286 // RB<20:16> == 30
287 // Disp<15:0>
288 const MachInst stq_mask = 0xfc1f0000;
289 const MachInst stq_pattern = 0xb41e0000;
290 const MachInst stq_disp_mask = 0x0000ffff;
291 const MachInst reg_mask = 0x03e00000;
292 const int reg_shift = 21;
301
293
302 return true;
294 if ((inst & stq_mask) == stq_pattern) {
295 reg = (inst & reg_mask) >> reg_shift;
296 disp = sext<16>(inst & stq_disp_mask);
297 } else {
298 return false;
303 }
304
299 }
300
305 /*
306 * Decode the function prologue for the function we're in, and note
307 * which registers are stored where, and how large the stack frame is.
308 */
309 bool
310 StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
311 int &size, Addr &ra)
312 {
313 size = 0;
314 ra = 0;
301 return true;
302}
315
303
316 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
317 MachInst inst;
318 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst));
304/*
305 * Decode the function prologue for the function we're in, and note
306 * which registers are stored where, and how large the stack frame is.
307 */
308bool
309StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func, int &size,
310 Addr &ra)
311{
312 size = 0;
313 ra = 0;
319
314
320 int reg, disp;
321 if (decodeStack(inst, disp)) {
322 if (size) {
323 // panic("decoding frame size again");
324 return true;
315 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) {
316 MachInst inst;
317 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst));
318
319 int reg, disp;
320 if (decodeStack(inst, disp)) {
321 if (size) {
322 // panic("decoding frame size again");
323 return true;
324 }
325 size += disp;
326 } else if (decodeSave(inst, reg, disp)) {
327 if (!ra && reg == ReturnAddressReg) {
328 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr));
329 if (!ra) {
330 // panic("no return address value pc=%#x\n", pc);
331 return false;
325 }
332 }
326 size += disp;
327 } else if (decodeSave(inst, reg, disp)) {
328 if (!ra && reg == ReturnAddressReg) {
329 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr));
330 if (!ra) {
331 // panic("no return address value pc=%#x\n", pc);
332 return false;
333 }
334 }
335 }
336 }
333 }
334 }
337
338 return true;
339 }
340
335 }
336
337 return true;
338}
339
341#if TRACING_ON
340#if TRACING_ON
342 void
343 StackTrace::dump()
344 {
345 StringWrap name(tc->getCpuPtr()->name());
346 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
341void
342StackTrace::dump()
343{
344 StringWrap name(tc->getCpuPtr()->name());
345 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab;
347
346
348 DPRINTFN("------ Stack ------\n");
347 DPRINTFN("------ Stack ------\n");
349
348
350 string symbol;
351 for (int i = 0, size = stack.size(); i < size; ++i) {
352 Addr addr = stack[size - i - 1];
353 if (addr == user)
354 symbol = "user";
355 else if (addr == console)
356 symbol = "console";
357 else if (addr == unknown)
358 symbol = "unknown";
359 else
360 symtab->findSymbol(addr, symbol);
349 string symbol;
350 for (int i = 0, size = stack.size(); i < size; ++i) {
351 Addr addr = stack[size - i - 1];
352 if (addr == user)
353 symbol = "user";
354 else if (addr == console)
355 symbol = "console";
356 else if (addr == unknown)
357 symbol = "unknown";
358 else
359 symtab->findSymbol(addr, symbol);
361
360
362 DPRINTFN("%#x: %s\n", addr, symbol);
363 }
361 DPRINTFN("%#x: %s\n", addr, symbol);
364 }
362 }
365#endif
366}
363}
364#endif
365
366} // namespace AlphaISA