stacktrace.cc (2684:71f3cabf891f) | stacktrace.cc (3570:aacc19068f25) |
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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; --- 26 unchanged lines hidden (view full) --- 35#include "arch/alpha/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; | 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; --- 26 unchanged lines hidden (view full) --- 35#include "arch/alpha/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; |
43using namespace AlphaISA; | |
44 | 43 |
45ProcessInfo::ProcessInfo(ThreadContext *_tc) 46 : tc(_tc) | 44namespace AlphaISA |
47{ | 45{ |
48 Addr addr = 0; | 46 ProcessInfo::ProcessInfo(ThreadContext *_tc) 47 : tc(_tc) 48 { 49 Addr addr = 0; |
49 | 50 |
50 VirtualPort *vp; | 51 VirtualPort *vp; |
51 | 52 |
52 vp = tc->getVirtPort(); | 53 vp = tc->getVirtPort(); |
53 | 54 |
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 | 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); |
57 | 58 |
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 | 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); |
61 | 62 |
62 if (!tc->getSystemPtr()->kernelSymtab->findAddress("thread_info_task", addr)) 63 panic("thread info not compiled into kernel\n"); 64 task_off = vp->readGtoH | 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); |
65 | 66 |
66 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_pid", addr)) 67 panic("thread info not compiled into kernel\n"); 68 pid_off = vp->readGtoH | 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); |
69 | 70 |
70 if (!tc->getSystemPtr()->kernelSymtab->findAddress("task_struct_comm", addr)) 71 panic("thread info not compiled into kernel\n"); 72 name_off = vp->readGtoH | 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); |
73 | 74 |
74 tc->delVirtPort(vp); 75} | 75 tc->delVirtPort(vp); 76 } |
76 | 77 |
77Addr 78ProcessInfo::task(Addr ksp) const 79{ 80 Addr base = ksp & ~0x3fff; 81 if (base == ULL(0xfffffc0000000000)) 82 return 0; | 78 Addr 79 ProcessInfo::task(Addr ksp) const 80 { 81 Addr base = ksp & ~0x3fff; 82 if (base == ULL(0xfffffc0000000000)) 83 return 0; |
83 | 84 |
84 Addr tsk; | 85 Addr tsk; |
85 | 86 |
86 VirtualPort *vp; | 87 VirtualPort *vp; |
87 | 88 |
88 vp = tc->getVirtPort(); 89 tsk = vp->readGtoH 90 tc->delVirtPort(vp); | 89 vp = tc->getVirtPort(); 90 tsk = vp->readGtoH<Addr>(base + task_off); 91 tc->delVirtPort(vp); |
91 | 92 |
92 return tsk; 93} | 93 return tsk; 94 } |
94 | 95 |
95int 96ProcessInfo::pid(Addr ksp) const 97{ 98 Addr task = this->task(ksp); 99 if (!task) 100 return -1; | 96 int 97 ProcessInfo::pid(Addr ksp) const 98 { 99 Addr task = this->task(ksp); 100 if (!task) 101 return -1; |
101 | 102 |
102 uint16_t pd; | 103 uint16_t pd; |
103 | 104 |
104 VirtualPort *vp; | 105 VirtualPort *vp; |
105 | 106 |
106 vp = tc->getVirtPort(); 107 pd = vp->readGtoH 108 tc->delVirtPort(vp); | 107 vp = tc->getVirtPort(); 108 pd = vp->readGtoH<uint16_t>(task + pid_off); 109 tc->delVirtPort(vp); |
109 | 110 |
110 return pd; 111} | 111 return pd; 112 } |
112 | 113 |
113string 114ProcessInfo::name(Addr ksp) const 115{ 116 Addr task = this->task(ksp); 117 if (!task) 118 return "console"; | 114 string 115 ProcessInfo::name(Addr ksp) const 116 { 117 Addr task = this->task(ksp); 118 if (!task) 119 return "console"; |
119 | 120 |
120 char comm[256]; 121 CopyStringOut(tc, comm, task + name_off, sizeof(comm)); 122 if (!comm[0]) 123 return "startup"; | 121 char comm[256]; 122 CopyStringOut(tc, comm, task + name_off, sizeof(comm)); 123 if (!comm[0]) 124 return "startup"; |
124 | 125 |
125 return comm; 126} | 126 return comm; 127 } |
127 | 128 |
128StackTrace::StackTrace() 129 : tc(0), stack(64) 130{ 131} | 129 StackTrace::StackTrace() 130 : tc(0), stack(64) 131 { 132 } |
132 | 133 |
133StackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst) 134 : tc(0), stack(64) 135{ 136 trace(_tc, inst); 137} | 134 StackTrace::StackTrace(ThreadContext *_tc, StaticInstPtr inst) 135 : tc(0), stack(64) 136 { 137 trace(_tc, inst); 138 } |
138 | 139 |
139StackTrace::~StackTrace() 140{ 141} | 140 StackTrace::~StackTrace() 141 { 142 } |
142 | 143 |
143void 144StackTrace::trace(ThreadContext *_tc, bool is_call) 145{ 146 tc = _tc; | 144 void 145 StackTrace::trace(ThreadContext *_tc, bool is_call) 146 { 147 tc = _tc; |
147 | 148 |
148 bool usermode = (tc->readMiscReg(AlphaISA::IPR_DTB_CM) & 0x18) != 0; | 149 bool usermode = (tc->readMiscReg(AlphaISA::IPR_DTB_CM) & 0x18) != 0; |
149 | 150 |
150 Addr pc = tc->readNextPC(); 151 bool kernel = tc->getSystemPtr()->kernelStart <= pc && 152 pc <= tc->getSystemPtr()->kernelEnd; | 151 Addr pc = tc->readNextPC(); 152 bool kernel = tc->getSystemPtr()->kernelStart <= pc && 153 pc <= tc->getSystemPtr()->kernelEnd; |
153 | 154 |
154 if (usermode) { 155 stack.push_back(user); 156 return; 157 } | 155 if (usermode) { 156 stack.push_back(user); 157 return; 158 } |
158 | 159 |
159 if (!kernel) { 160 stack.push_back(console); 161 return; 162 } | 160 if (!kernel) { 161 stack.push_back(console); 162 return; 163 } |
163 | 164 |
164 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab; 165 Addr ksp = tc->readIntReg(TheISA::StackPointerReg); 166 Addr bottom = ksp & ~0x3fff; 167 Addr addr; | 165 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab; 166 Addr ksp = tc->readIntReg(TheISA::StackPointerReg); 167 Addr bottom = ksp & ~0x3fff; 168 Addr addr; |
168 | 169 |
169 if (is_call) { 170 if (!symtab->findNearestAddr(pc, addr)) 171 panic("could not find address %#x", pc); | 170 if (is_call) { 171 if (!symtab->findNearestAddr(pc, addr)) 172 panic("could not find address %#x", pc); |
172 | 173 |
173 stack.push_back(addr); 174 pc = tc->readPC(); 175 } | 174 stack.push_back(addr); 175 pc = tc->readPC(); 176 } |
176 | 177 |
177 Addr ra; 178 int size; | 178 Addr ra; 179 int size; |
179 | 180 |
180 while (ksp > bottom) { 181 if (!symtab->findNearestAddr(pc, addr)) 182 panic("could not find symbol for pc=%#x", pc); 183 assert(pc >= addr && "symbol botch: callpc < func"); | 181 while (ksp > bottom) { 182 if (!symtab->findNearestAddr(pc, addr)) 183 panic("could not find symbol for pc=%#x", pc); 184 assert(pc >= addr && "symbol botch: callpc < func"); |
184 | 185 |
185 stack.push_back(addr); | 186 stack.push_back(addr); |
186 | 187 |
187 if (isEntry(addr)) 188 return; 189 190 if (decodePrologue(ksp, pc, addr, size, ra)) { 191 if (!ra) | 188 if (isEntry(addr)) |
192 return; 193 | 189 return; 190 |
194 if (size <= 0) { | 191 if (decodePrologue(ksp, pc, addr, size, ra)) { 192 if (!ra) 193 return; 194 195 if (size <= 0) { 196 stack.push_back(unknown); 197 return; 198 } 199 200 pc = ra; 201 ksp += size; 202 } else { |
195 stack.push_back(unknown); 196 return; 197 } 198 | 203 stack.push_back(unknown); 204 return; 205 } 206 |
199 pc = ra; 200 ksp += size; 201 } else { 202 stack.push_back(unknown); 203 return; | 207 bool kernel = tc->getSystemPtr()->kernelStart <= pc && 208 pc <= tc->getSystemPtr()->kernelEnd; 209 if (!kernel) 210 return; 211 212 if (stack.size() >= 1000) 213 panic("unwinding too far"); |
204 } 205 | 214 } 215 |
206 bool kernel = tc->getSystemPtr()->kernelStart <= pc && 207 pc <= tc->getSystemPtr()->kernelEnd; 208 if (!kernel) 209 return; 210 211 if (stack.size() >= 1000) 212 panic("unwinding too far"); | 216 panic("unwinding too far"); |
213 } 214 | 217 } 218 |
215 panic("unwinding too far"); 216} | 219 bool 220 StackTrace::isEntry(Addr addr) 221 { 222 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp12)) 223 return true; |
217 | 224 |
218bool 219StackTrace::isEntry(Addr addr) 220{ 221 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp12)) 222 return true; | 225 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp7)) 226 return true; |
223 | 227 |
224 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp7)) 225 return true; | 228 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp11)) 229 return true; |
226 | 230 |
227 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp11)) 228 return true; | 231 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp21)) 232 return true; |
229 | 233 |
230 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp21)) 231 return true; | 234 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp9)) 235 return true; |
232 | 236 |
233 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp9)) 234 return true; | 237 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp2)) 238 return true; |
235 | 239 |
236 if (addr == tc->readMiscReg(AlphaISA::IPR_PALtemp2)) 237 return true; | 240 return false; 241 } |
238 | 242 |
239 return false; 240} | 243 bool 244 StackTrace::decodeStack(MachInst inst, int &disp) 245 { 246 // lda $sp, -disp($sp) 247 // 248 // Opcode<31:26> == 0x08 249 // RA<25:21> == 30 250 // RB<20:16> == 30 251 // Disp<15:0> 252 const MachInst mem_mask = 0xffff0000; 253 const MachInst lda_pattern = 0x23de0000; 254 const MachInst lda_disp_mask = 0x0000ffff; |
241 | 255 |
242bool 243StackTrace::decodeStack(MachInst inst, int &disp) 244{ 245 // lda $sp, -disp($sp) 246 // 247 // Opcode<31:26> == 0x08 248 // RA<25:21> == 30 249 // RB<20:16> == 30 250 // Disp<15:0> 251 const MachInst mem_mask = 0xffff0000; 252 const MachInst lda_pattern = 0x23de0000; 253 const MachInst lda_disp_mask = 0x0000ffff; | 256 // subq $sp, disp, $sp 257 // addq $sp, disp, $sp 258 // 259 // Opcode<31:26> == 0x10 260 // RA<25:21> == 30 261 // Lit<20:13> 262 // One<12> = 1 263 // Func<11:5> == 0x20 (addq) 264 // Func<11:5> == 0x29 (subq) 265 // RC<4:0> == 30 266 const MachInst intop_mask = 0xffe01fff; 267 const MachInst addq_pattern = 0x43c0141e; 268 const MachInst subq_pattern = 0x43c0153e; 269 const MachInst intop_disp_mask = 0x001fe000; 270 const int intop_disp_shift = 13; |
254 | 271 |
255 // subq $sp, disp, $sp 256 // addq $sp, disp, $sp 257 // 258 // Opcode<31:26> == 0x10 259 // RA<25:21> == 30 260 // Lit<20:13> 261 // One<12> = 1 262 // Func<11:5> == 0x20 (addq) 263 // Func<11:5> == 0x29 (subq) 264 // RC<4:0> == 30 265 const MachInst intop_mask = 0xffe01fff; 266 const MachInst addq_pattern = 0x43c0141e; 267 const MachInst subq_pattern = 0x43c0153e; 268 const MachInst intop_disp_mask = 0x001fe000; 269 const int intop_disp_shift = 13; | 272 if ((inst & mem_mask) == lda_pattern) 273 disp = -sext<16>(inst & lda_disp_mask); 274 else if ((inst & intop_mask) == addq_pattern) 275 disp = -int((inst & intop_disp_mask) >> intop_disp_shift); 276 else if ((inst & intop_mask) == subq_pattern) 277 disp = int((inst & intop_disp_mask) >> intop_disp_shift); 278 else 279 return false; |
270 | 280 |
271 if ((inst & mem_mask) == lda_pattern) 272 disp = -sext<16>(inst & lda_disp_mask); 273 else if ((inst & intop_mask) == addq_pattern) 274 disp = -int((inst & intop_disp_mask) >> intop_disp_shift); 275 else if ((inst & intop_mask) == subq_pattern) 276 disp = int((inst & intop_disp_mask) >> intop_disp_shift); 277 else 278 return false; | 281 return true; 282 } |
279 | 283 |
280 return true; 281} | 284 bool 285 StackTrace::decodeSave(MachInst inst, int ®, int &disp) 286 { 287 // lda $stq, disp($sp) 288 // 289 // Opcode<31:26> == 0x08 290 // RA<25:21> == ? 291 // RB<20:16> == 30 292 // Disp<15:0> 293 const MachInst stq_mask = 0xfc1f0000; 294 const MachInst stq_pattern = 0xb41e0000; 295 const MachInst stq_disp_mask = 0x0000ffff; 296 const MachInst reg_mask = 0x03e00000; 297 const int reg_shift = 21; |
282 | 298 |
283bool 284StackTrace::decodeSave(MachInst inst, int ®, int &disp) 285{ 286 // lda $stq, disp($sp) 287 // 288 // Opcode<31:26> == 0x08 289 // RA<25:21> == ? 290 // RB<20:16> == 30 291 // Disp<15:0> 292 const MachInst stq_mask = 0xfc1f0000; 293 const MachInst stq_pattern = 0xb41e0000; 294 const MachInst stq_disp_mask = 0x0000ffff; 295 const MachInst reg_mask = 0x03e00000; 296 const int reg_shift = 21; | 299 if ((inst & stq_mask) == stq_pattern) { 300 reg = (inst & reg_mask) >> reg_shift; 301 disp = sext<16>(inst & stq_disp_mask); 302 } else { 303 return false; 304 } |
297 | 305 |
298 if ((inst & stq_mask) == stq_pattern) { 299 reg = (inst & reg_mask) >> reg_shift; 300 disp = sext<16>(inst & stq_disp_mask); 301 } else { 302 return false; | 306 return true; |
303 } 304 | 307 } 308 |
305 return true; 306} | 309 /* 310 * Decode the function prologue for the function we're in, and note 311 * which registers are stored where, and how large the stack frame is. 312 */ 313 bool 314 StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func, 315 int &size, Addr &ra) 316 { 317 size = 0; 318 ra = 0; |
307 | 319 |
308/* 309 * Decode the function prologue for the function we're in, and note 310 * which registers are stored where, and how large the stack frame is. 311 */ 312bool 313StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func, 314 int &size, Addr &ra) 315{ 316 size = 0; 317 ra = 0; | 320 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) { 321 MachInst inst; 322 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst)); |
318 | 323 |
319 for (Addr pc = func; pc < callpc; pc += sizeof(MachInst)) { 320 MachInst inst; 321 CopyOut(tc, (uint8_t *)&inst, pc, sizeof(MachInst)); 322 323 int reg, disp; 324 if (decodeStack(inst, disp)) { 325 if (size) { 326 // panic("decoding frame size again"); 327 return true; 328 } 329 size += disp; 330 } else if (decodeSave(inst, reg, disp)) { 331 if (!ra && reg == ReturnAddressReg) { 332 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr)); 333 if (!ra) { 334 // panic("no return address value pc=%#x\n", pc); 335 return false; | 324 int reg, disp; 325 if (decodeStack(inst, disp)) { 326 if (size) { 327 // panic("decoding frame size again"); 328 return true; |
336 } | 329 } |
330 size += disp; 331 } else if (decodeSave(inst, reg, disp)) { 332 if (!ra && reg == ReturnAddressReg) { 333 CopyOut(tc, (uint8_t *)&ra, sp + disp, sizeof(Addr)); 334 if (!ra) { 335 // panic("no return address value pc=%#x\n", pc); 336 return false; 337 } 338 } |
|
337 } 338 } | 339 } 340 } |
341 342 return true; |
|
339 } 340 | 343 } 344 |
341 return true; 342} 343 | |
344#if TRACING_ON | 345#if TRACING_ON |
345void 346StackTrace::dump() 347{ 348 StringWrap name(tc->getCpuPtr()->name()); 349 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab; | 346 void 347 StackTrace::dump() 348 { 349 StringWrap name(tc->getCpuPtr()->name()); 350 SymbolTable *symtab = tc->getSystemPtr()->kernelSymtab; |
350 | 351 |
351 DPRINTFN("------ Stack ------\n"); | 352 DPRINTFN("------ Stack ------\n"); |
352 | 353 |
353 string symbol; 354 for (int i = 0, size = stack.size(); i < size; ++i) { 355 Addr addr = stack[size - i - 1]; 356 if (addr == user) 357 symbol = "user"; 358 else if (addr == console) 359 symbol = "console"; 360 else if (addr == unknown) 361 symbol = "unknown"; 362 else 363 symtab->findSymbol(addr, symbol); | 354 string symbol; 355 for (int i = 0, size = stack.size(); i < size; ++i) { 356 Addr addr = stack[size - i - 1]; 357 if (addr == user) 358 symbol = "user"; 359 else if (addr == console) 360 symbol = "console"; 361 else if (addr == unknown) 362 symbol = "unknown"; 363 else 364 symtab->findSymbol(addr, symbol); |
364 | 365 |
365 DPRINTFN("%#x: %s\n", addr, symbol); | 366 DPRINTFN("%#x: %s\n", addr, symbol); 367 } |
366 } | 368 } |
367} | |
368#endif | 369#endif |
370} |
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