stacktrace.cc (5568:d14250d688d2) | stacktrace.cc (5569:baeee670d4ce) |
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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; --- 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 | 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 ®, 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 ®, 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 |
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