| File: | src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/Utility/StopInfoMachException.cpp |
| Warning: | line 452, column 9 Value stored to 'is_actual_breakpoint' is never read |
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| 1 | //===-- StopInfoMachException.cpp -----------------------------------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "StopInfoMachException.h" |
| 10 | |
| 11 | #include "lldb/lldb-forward.h" |
| 12 | |
| 13 | #if defined(__APPLE__) |
| 14 | // Needed for the EXC_RESOURCE interpretation macros |
| 15 | #include <kern/exc_resource.h> |
| 16 | #endif |
| 17 | |
| 18 | #include "lldb/Breakpoint/Watchpoint.h" |
| 19 | #include "lldb/Symbol/Symbol.h" |
| 20 | #include "lldb/Target/DynamicLoader.h" |
| 21 | #include "lldb/Target/ExecutionContext.h" |
| 22 | #include "lldb/Target/Process.h" |
| 23 | #include "lldb/Target/RegisterContext.h" |
| 24 | #include "lldb/Target/Target.h" |
| 25 | #include "lldb/Target/Thread.h" |
| 26 | #include "lldb/Target/ThreadPlan.h" |
| 27 | #include "lldb/Target/UnixSignals.h" |
| 28 | #include "lldb/Utility/StreamString.h" |
| 29 | |
| 30 | using namespace lldb; |
| 31 | using namespace lldb_private; |
| 32 | |
| 33 | const char *StopInfoMachException::GetDescription() { |
| 34 | if (!m_description.empty()) |
| 35 | return m_description.c_str(); |
| 36 | if (GetValue() == eStopReasonInvalid) |
| 37 | return "invalid stop reason!"; |
| 38 | |
| 39 | ExecutionContext exe_ctx(m_thread_wp.lock()); |
| 40 | Target *target = exe_ctx.GetTargetPtr(); |
| 41 | const llvm::Triple::ArchType cpu = |
| 42 | target ? target->GetArchitecture().GetMachine() |
| 43 | : llvm::Triple::UnknownArch; |
| 44 | |
| 45 | const char *exc_desc = nullptr; |
| 46 | const char *code_label = "code"; |
| 47 | const char *code_desc = nullptr; |
| 48 | const char *subcode_label = "subcode"; |
| 49 | const char *subcode_desc = nullptr; |
| 50 | |
| 51 | #if defined(__APPLE__) |
| 52 | char code_desc_buf[32]; |
| 53 | char subcode_desc_buf[32]; |
| 54 | #endif |
| 55 | |
| 56 | switch (m_value) { |
| 57 | case 1: // EXC_BAD_ACCESS |
| 58 | exc_desc = "EXC_BAD_ACCESS"; |
| 59 | subcode_label = "address"; |
| 60 | switch (cpu) { |
| 61 | case llvm::Triple::x86: |
| 62 | case llvm::Triple::x86_64: |
| 63 | switch (m_exc_code) { |
| 64 | case 0xd: |
| 65 | code_desc = "EXC_I386_GPFLT"; |
| 66 | m_exc_data_count = 1; |
| 67 | break; |
| 68 | } |
| 69 | break; |
| 70 | case llvm::Triple::arm: |
| 71 | case llvm::Triple::thumb: |
| 72 | switch (m_exc_code) { |
| 73 | case 0x101: |
| 74 | code_desc = "EXC_ARM_DA_ALIGN"; |
| 75 | break; |
| 76 | case 0x102: |
| 77 | code_desc = "EXC_ARM_DA_DEBUG"; |
| 78 | break; |
| 79 | } |
| 80 | break; |
| 81 | |
| 82 | default: |
| 83 | break; |
| 84 | } |
| 85 | break; |
| 86 | |
| 87 | case 2: // EXC_BAD_INSTRUCTION |
| 88 | exc_desc = "EXC_BAD_INSTRUCTION"; |
| 89 | switch (cpu) { |
| 90 | case llvm::Triple::x86: |
| 91 | case llvm::Triple::x86_64: |
| 92 | if (m_exc_code == 1) |
| 93 | code_desc = "EXC_I386_INVOP"; |
| 94 | break; |
| 95 | |
| 96 | case llvm::Triple::arm: |
| 97 | case llvm::Triple::thumb: |
| 98 | if (m_exc_code == 1) |
| 99 | code_desc = "EXC_ARM_UNDEFINED"; |
| 100 | break; |
| 101 | |
| 102 | default: |
| 103 | break; |
| 104 | } |
| 105 | break; |
| 106 | |
| 107 | case 3: // EXC_ARITHMETIC |
| 108 | exc_desc = "EXC_ARITHMETIC"; |
| 109 | switch (cpu) { |
| 110 | case llvm::Triple::x86: |
| 111 | case llvm::Triple::x86_64: |
| 112 | switch (m_exc_code) { |
| 113 | case 1: |
| 114 | code_desc = "EXC_I386_DIV"; |
| 115 | break; |
| 116 | case 2: |
| 117 | code_desc = "EXC_I386_INTO"; |
| 118 | break; |
| 119 | case 3: |
| 120 | code_desc = "EXC_I386_NOEXT"; |
| 121 | break; |
| 122 | case 4: |
| 123 | code_desc = "EXC_I386_EXTOVR"; |
| 124 | break; |
| 125 | case 5: |
| 126 | code_desc = "EXC_I386_EXTERR"; |
| 127 | break; |
| 128 | case 6: |
| 129 | code_desc = "EXC_I386_EMERR"; |
| 130 | break; |
| 131 | case 7: |
| 132 | code_desc = "EXC_I386_BOUND"; |
| 133 | break; |
| 134 | case 8: |
| 135 | code_desc = "EXC_I386_SSEEXTERR"; |
| 136 | break; |
| 137 | } |
| 138 | break; |
| 139 | |
| 140 | default: |
| 141 | break; |
| 142 | } |
| 143 | break; |
| 144 | |
| 145 | case 4: // EXC_EMULATION |
| 146 | exc_desc = "EXC_EMULATION"; |
| 147 | break; |
| 148 | |
| 149 | case 5: // EXC_SOFTWARE |
| 150 | exc_desc = "EXC_SOFTWARE"; |
| 151 | if (m_exc_code == 0x10003) { |
| 152 | subcode_desc = "EXC_SOFT_SIGNAL"; |
| 153 | subcode_label = "signo"; |
| 154 | } |
| 155 | break; |
| 156 | |
| 157 | case 6: // EXC_BREAKPOINT |
| 158 | { |
| 159 | exc_desc = "EXC_BREAKPOINT"; |
| 160 | switch (cpu) { |
| 161 | case llvm::Triple::x86: |
| 162 | case llvm::Triple::x86_64: |
| 163 | switch (m_exc_code) { |
| 164 | case 1: |
| 165 | code_desc = "EXC_I386_SGL"; |
| 166 | break; |
| 167 | case 2: |
| 168 | code_desc = "EXC_I386_BPT"; |
| 169 | break; |
| 170 | } |
| 171 | break; |
| 172 | |
| 173 | case llvm::Triple::arm: |
| 174 | case llvm::Triple::thumb: |
| 175 | switch (m_exc_code) { |
| 176 | case 0x101: |
| 177 | code_desc = "EXC_ARM_DA_ALIGN"; |
| 178 | break; |
| 179 | case 0x102: |
| 180 | code_desc = "EXC_ARM_DA_DEBUG"; |
| 181 | break; |
| 182 | case 1: |
| 183 | code_desc = "EXC_ARM_BREAKPOINT"; |
| 184 | break; |
| 185 | // FIXME temporary workaround, exc_code 0 does not really mean |
| 186 | // EXC_ARM_BREAKPOINT |
| 187 | case 0: |
| 188 | code_desc = "EXC_ARM_BREAKPOINT"; |
| 189 | break; |
| 190 | } |
| 191 | break; |
| 192 | |
| 193 | default: |
| 194 | break; |
| 195 | } |
| 196 | } break; |
| 197 | |
| 198 | case 7: |
| 199 | exc_desc = "EXC_SYSCALL"; |
| 200 | break; |
| 201 | |
| 202 | case 8: |
| 203 | exc_desc = "EXC_MACH_SYSCALL"; |
| 204 | break; |
| 205 | |
| 206 | case 9: |
| 207 | exc_desc = "EXC_RPC_ALERT"; |
| 208 | break; |
| 209 | |
| 210 | case 10: |
| 211 | exc_desc = "EXC_CRASH"; |
| 212 | break; |
| 213 | case 11: |
| 214 | exc_desc = "EXC_RESOURCE"; |
| 215 | #if defined(__APPLE__) |
| 216 | { |
| 217 | int resource_type = EXC_RESOURCE_DECODE_RESOURCE_TYPE(m_exc_code); |
| 218 | |
| 219 | code_label = "limit"; |
| 220 | code_desc = code_desc_buf; |
| 221 | subcode_label = "observed"; |
| 222 | subcode_desc = subcode_desc_buf; |
| 223 | |
| 224 | switch (resource_type) { |
| 225 | case RESOURCE_TYPE_CPU: |
| 226 | exc_desc = "EXC_RESOURCE RESOURCE_TYPE_CPU"; |
| 227 | snprintf(code_desc_buf, sizeof(code_desc_buf), "%d%%", |
| 228 | (int)EXC_RESOURCE_CPUMONITOR_DECODE_PERCENTAGE(m_exc_code)); |
| 229 | snprintf(subcode_desc_buf, sizeof(subcode_desc_buf), "%d%%", |
| 230 | (int)EXC_RESOURCE_CPUMONITOR_DECODE_PERCENTAGE_OBSERVED( |
| 231 | m_exc_subcode)); |
| 232 | break; |
| 233 | case RESOURCE_TYPE_WAKEUPS: |
| 234 | exc_desc = "EXC_RESOURCE RESOURCE_TYPE_WAKEUPS"; |
| 235 | snprintf( |
| 236 | code_desc_buf, sizeof(code_desc_buf), "%d w/s", |
| 237 | (int)EXC_RESOURCE_CPUMONITOR_DECODE_WAKEUPS_PERMITTED(m_exc_code)); |
| 238 | snprintf(subcode_desc_buf, sizeof(subcode_desc_buf), "%d w/s", |
| 239 | (int)EXC_RESOURCE_CPUMONITOR_DECODE_WAKEUPS_OBSERVED( |
| 240 | m_exc_subcode)); |
| 241 | break; |
| 242 | case RESOURCE_TYPE_MEMORY: |
| 243 | exc_desc = "EXC_RESOURCE RESOURCE_TYPE_MEMORY"; |
| 244 | snprintf(code_desc_buf, sizeof(code_desc_buf), "%d MB", |
| 245 | (int)EXC_RESOURCE_HWM_DECODE_LIMIT(m_exc_code)); |
| 246 | subcode_desc = nullptr; |
| 247 | subcode_label = "unused"; |
| 248 | break; |
| 249 | #if defined(RESOURCE_TYPE_IO) |
| 250 | // RESOURCE_TYPE_IO is introduced in macOS SDK 10.12. |
| 251 | case RESOURCE_TYPE_IO: |
| 252 | exc_desc = "EXC_RESOURCE RESOURCE_TYPE_IO"; |
| 253 | snprintf(code_desc_buf, sizeof(code_desc_buf), "%d MB", |
| 254 | (int)EXC_RESOURCE_IO_DECODE_LIMIT(m_exc_code)); |
| 255 | snprintf(subcode_desc_buf, sizeof(subcode_desc_buf), "%d MB", |
| 256 | (int)EXC_RESOURCE_IO_OBSERVED(m_exc_subcode)); |
| 257 | ; |
| 258 | break; |
| 259 | #endif |
| 260 | } |
| 261 | } |
| 262 | #endif |
| 263 | break; |
| 264 | case 12: |
| 265 | exc_desc = "EXC_GUARD"; |
| 266 | break; |
| 267 | } |
| 268 | |
| 269 | StreamString strm; |
| 270 | |
| 271 | if (exc_desc) |
| 272 | strm.PutCString(exc_desc); |
| 273 | else |
| 274 | strm.Printf("EXC_??? (%" PRIu64"llu" ")", m_value); |
| 275 | |
| 276 | if (m_exc_data_count >= 1) { |
| 277 | if (code_desc) |
| 278 | strm.Printf(" (%s=%s", code_label, code_desc); |
| 279 | else |
| 280 | strm.Printf(" (%s=%" PRIu64"llu", code_label, m_exc_code); |
| 281 | } |
| 282 | |
| 283 | if (m_exc_data_count >= 2) { |
| 284 | if (subcode_desc) |
| 285 | strm.Printf(", %s=%s", subcode_label, subcode_desc); |
| 286 | else |
| 287 | strm.Printf(", %s=0x%" PRIx64"llx", subcode_label, m_exc_subcode); |
| 288 | } |
| 289 | |
| 290 | if (m_exc_data_count > 0) |
| 291 | strm.PutChar(')'); |
| 292 | |
| 293 | m_description = std::string(strm.GetString()); |
| 294 | return m_description.c_str(); |
| 295 | } |
| 296 | |
| 297 | static StopInfoSP GetStopInfoForHardwareBP(Thread &thread, Target *target, |
| 298 | uint32_t exc_data_count, |
| 299 | uint64_t exc_sub_code, |
| 300 | uint64_t exc_sub_sub_code) { |
| 301 | // Try hardware watchpoint. |
| 302 | if (target) { |
| 303 | // The exc_sub_code indicates the data break address. |
| 304 | lldb::WatchpointSP wp_sp = |
| 305 | target->GetWatchpointList().FindByAddress((lldb::addr_t)exc_sub_code); |
| 306 | if (wp_sp && wp_sp->IsEnabled()) { |
| 307 | // Debugserver may piggyback the hardware index of the fired watchpoint |
| 308 | // in the exception data. Set the hardware index if that's the case. |
| 309 | if (exc_data_count >= 3) |
| 310 | wp_sp->SetHardwareIndex((uint32_t)exc_sub_sub_code); |
| 311 | return StopInfo::CreateStopReasonWithWatchpointID(thread, wp_sp->GetID()); |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | // Try hardware breakpoint. |
| 316 | ProcessSP process_sp(thread.GetProcess()); |
| 317 | if (process_sp) { |
| 318 | // The exc_sub_code indicates the data break address. |
| 319 | lldb::BreakpointSiteSP bp_sp = |
| 320 | process_sp->GetBreakpointSiteList().FindByAddress( |
| 321 | (lldb::addr_t)exc_sub_code); |
| 322 | if (bp_sp && bp_sp->IsEnabled()) { |
| 323 | // Debugserver may piggyback the hardware index of the fired breakpoint |
| 324 | // in the exception data. Set the hardware index if that's the case. |
| 325 | if (exc_data_count >= 3) |
| 326 | bp_sp->SetHardwareIndex((uint32_t)exc_sub_sub_code); |
| 327 | return StopInfo::CreateStopReasonWithBreakpointSiteID(thread, |
| 328 | bp_sp->GetID()); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | return nullptr; |
| 333 | } |
| 334 | |
| 335 | StopInfoSP StopInfoMachException::CreateStopReasonWithMachException( |
| 336 | Thread &thread, uint32_t exc_type, uint32_t exc_data_count, |
| 337 | uint64_t exc_code, uint64_t exc_sub_code, uint64_t exc_sub_sub_code, |
| 338 | bool pc_already_adjusted, bool adjust_pc_if_needed) { |
| 339 | if (exc_type == 0) |
| 340 | return StopInfoSP(); |
| 341 | |
| 342 | uint32_t pc_decrement = 0; |
| 343 | ExecutionContext exe_ctx(thread.shared_from_this()); |
| 344 | Target *target = exe_ctx.GetTargetPtr(); |
| 345 | const llvm::Triple::ArchType cpu = |
| 346 | target ? target->GetArchitecture().GetMachine() |
| 347 | : llvm::Triple::UnknownArch; |
| 348 | |
| 349 | switch (exc_type) { |
| 350 | case 1: // EXC_BAD_ACCESS |
| 351 | case 2: // EXC_BAD_INSTRUCTION |
| 352 | case 3: // EXC_ARITHMETIC |
| 353 | case 4: // EXC_EMULATION |
| 354 | break; |
| 355 | |
| 356 | case 5: // EXC_SOFTWARE |
| 357 | if (exc_code == 0x10003) // EXC_SOFT_SIGNAL |
| 358 | { |
| 359 | if (exc_sub_code == 5) { |
| 360 | // On MacOSX, a SIGTRAP can signify that a process has called exec, |
| 361 | // so we should check with our dynamic loader to verify. |
| 362 | ProcessSP process_sp(thread.GetProcess()); |
| 363 | if (process_sp) { |
| 364 | DynamicLoader *dynamic_loader = process_sp->GetDynamicLoader(); |
| 365 | if (dynamic_loader && dynamic_loader->ProcessDidExec()) { |
| 366 | // The program was re-exec'ed |
| 367 | return StopInfo::CreateStopReasonWithExec(thread); |
| 368 | } |
| 369 | } |
| 370 | } |
| 371 | return StopInfo::CreateStopReasonWithSignal(thread, exc_sub_code); |
| 372 | } |
| 373 | break; |
| 374 | |
| 375 | case 6: // EXC_BREAKPOINT |
| 376 | { |
| 377 | bool is_actual_breakpoint = false; |
| 378 | bool is_trace_if_actual_breakpoint_missing = false; |
| 379 | switch (cpu) { |
| 380 | case llvm::Triple::x86: |
| 381 | case llvm::Triple::x86_64: |
| 382 | if (exc_code == 1) // EXC_I386_SGL |
| 383 | { |
| 384 | if (!exc_sub_code) { |
| 385 | // This looks like a plain trap. |
| 386 | // Have to check if there is a breakpoint here as well. When you |
| 387 | // single-step onto a trap, the single step stops you not to trap. |
| 388 | // Since we also do that check below, let's just use that logic. |
| 389 | is_actual_breakpoint = true; |
| 390 | is_trace_if_actual_breakpoint_missing = true; |
| 391 | } else { |
| 392 | if (StopInfoSP stop_info = |
| 393 | GetStopInfoForHardwareBP(thread, target, exc_data_count, |
| 394 | exc_sub_code, exc_sub_sub_code)) |
| 395 | return stop_info; |
| 396 | } |
| 397 | } else if (exc_code == 2 || // EXC_I386_BPT |
| 398 | exc_code == 3) // EXC_I386_BPTFLT |
| 399 | { |
| 400 | // KDP returns EXC_I386_BPTFLT for trace breakpoints |
| 401 | if (exc_code == 3) |
| 402 | is_trace_if_actual_breakpoint_missing = true; |
| 403 | |
| 404 | is_actual_breakpoint = true; |
| 405 | if (!pc_already_adjusted) |
| 406 | pc_decrement = 1; |
| 407 | } |
| 408 | break; |
| 409 | |
| 410 | case llvm::Triple::arm: |
| 411 | case llvm::Triple::thumb: |
| 412 | if (exc_code == 0x102) // EXC_ARM_DA_DEBUG |
| 413 | { |
| 414 | // It's a watchpoint, then, if the exc_sub_code indicates a |
| 415 | // known/enabled data break address from our watchpoint list. |
| 416 | lldb::WatchpointSP wp_sp; |
| 417 | if (target) |
| 418 | wp_sp = target->GetWatchpointList().FindByAddress( |
| 419 | (lldb::addr_t)exc_sub_code); |
| 420 | if (wp_sp && wp_sp->IsEnabled()) { |
| 421 | // Debugserver may piggyback the hardware index of the fired |
| 422 | // watchpoint in the exception data. Set the hardware index if |
| 423 | // that's the case. |
| 424 | if (exc_data_count >= 3) |
| 425 | wp_sp->SetHardwareIndex((uint32_t)exc_sub_sub_code); |
| 426 | return StopInfo::CreateStopReasonWithWatchpointID(thread, |
| 427 | wp_sp->GetID()); |
| 428 | } else { |
| 429 | is_actual_breakpoint = true; |
| 430 | is_trace_if_actual_breakpoint_missing = true; |
| 431 | } |
| 432 | } else if (exc_code == 1) // EXC_ARM_BREAKPOINT |
| 433 | { |
| 434 | is_actual_breakpoint = true; |
| 435 | is_trace_if_actual_breakpoint_missing = true; |
| 436 | } else if (exc_code == 0) // FIXME not EXC_ARM_BREAKPOINT but a kernel |
| 437 | // is currently returning this so accept it |
| 438 | // as indicating a breakpoint until the |
| 439 | // kernel is fixed |
| 440 | { |
| 441 | is_actual_breakpoint = true; |
| 442 | is_trace_if_actual_breakpoint_missing = true; |
| 443 | } |
| 444 | break; |
| 445 | |
| 446 | case llvm::Triple::aarch64_32: |
| 447 | case llvm::Triple::aarch64: { |
| 448 | if (exc_code == 1 && exc_sub_code == 0) // EXC_ARM_BREAKPOINT |
| 449 | { |
| 450 | // This is hit when we single instruction step aka MDSCR_EL1 SS bit 0 |
| 451 | // is set |
| 452 | is_actual_breakpoint = false; |
Value stored to 'is_actual_breakpoint' is never read | |
| 453 | is_trace_if_actual_breakpoint_missing = true; |
| 454 | } |
| 455 | if (exc_code == 0x102) // EXC_ARM_DA_DEBUG |
| 456 | { |
| 457 | // It's a watchpoint, then, if the exc_sub_code indicates a |
| 458 | // known/enabled data break address from our watchpoint list. |
| 459 | lldb::WatchpointSP wp_sp; |
| 460 | if (target) |
| 461 | wp_sp = target->GetWatchpointList().FindByAddress( |
| 462 | (lldb::addr_t)exc_sub_code); |
| 463 | if (wp_sp && wp_sp->IsEnabled()) { |
| 464 | // Debugserver may piggyback the hardware index of the fired |
| 465 | // watchpoint in the exception data. Set the hardware index if |
| 466 | // that's the case. |
| 467 | if (exc_data_count >= 3) |
| 468 | wp_sp->SetHardwareIndex((uint32_t)exc_sub_sub_code); |
| 469 | return StopInfo::CreateStopReasonWithWatchpointID(thread, |
| 470 | wp_sp->GetID()); |
| 471 | } |
| 472 | // EXC_ARM_DA_DEBUG seems to be reused for EXC_BREAKPOINT as well as |
| 473 | // EXC_BAD_ACCESS |
| 474 | if (thread.GetTemporaryResumeState() == eStateStepping) |
| 475 | return StopInfo::CreateStopReasonToTrace(thread); |
| 476 | } |
| 477 | // It looks like exc_sub_code has the 4 bytes of the instruction that |
| 478 | // triggered the exception, i.e. our breakpoint opcode |
| 479 | is_actual_breakpoint = exc_code == 1; |
| 480 | break; |
| 481 | } |
| 482 | |
| 483 | default: |
| 484 | break; |
| 485 | } |
| 486 | |
| 487 | if (is_actual_breakpoint) { |
| 488 | RegisterContextSP reg_ctx_sp(thread.GetRegisterContext()); |
| 489 | addr_t pc = reg_ctx_sp->GetPC() - pc_decrement; |
| 490 | |
| 491 | ProcessSP process_sp(thread.CalculateProcess()); |
| 492 | |
| 493 | lldb::BreakpointSiteSP bp_site_sp; |
| 494 | if (process_sp) |
| 495 | bp_site_sp = process_sp->GetBreakpointSiteList().FindByAddress(pc); |
| 496 | if (bp_site_sp && bp_site_sp->IsEnabled()) { |
| 497 | // Update the PC if we were asked to do so, but only do so if we find |
| 498 | // a breakpoint that we know about cause this could be a trap |
| 499 | // instruction in the code |
| 500 | if (pc_decrement > 0 && adjust_pc_if_needed) |
| 501 | reg_ctx_sp->SetPC(pc); |
| 502 | |
| 503 | // If the breakpoint is for this thread, then we'll report the hit, |
| 504 | // but if it is for another thread, we can just report no reason. We |
| 505 | // don't need to worry about stepping over the breakpoint here, that |
| 506 | // will be taken care of when the thread resumes and notices that |
| 507 | // there's a breakpoint under the pc. If we have an operating system |
| 508 | // plug-in, we might have set a thread specific breakpoint using the |
| 509 | // operating system thread ID, so we can't make any assumptions about |
| 510 | // the thread ID so we must always report the breakpoint regardless |
| 511 | // of the thread. |
| 512 | if (bp_site_sp->ValidForThisThread(thread) || |
| 513 | thread.GetProcess()->GetOperatingSystem() != nullptr) |
| 514 | return StopInfo::CreateStopReasonWithBreakpointSiteID( |
| 515 | thread, bp_site_sp->GetID()); |
| 516 | else if (is_trace_if_actual_breakpoint_missing) |
| 517 | return StopInfo::CreateStopReasonToTrace(thread); |
| 518 | else |
| 519 | return StopInfoSP(); |
| 520 | } |
| 521 | |
| 522 | // Don't call this a trace if we weren't single stepping this thread. |
| 523 | if (is_trace_if_actual_breakpoint_missing && |
| 524 | thread.GetTemporaryResumeState() == eStateStepping) { |
| 525 | return StopInfo::CreateStopReasonToTrace(thread); |
| 526 | } |
| 527 | } |
| 528 | } break; |
| 529 | |
| 530 | case 7: // EXC_SYSCALL |
| 531 | case 8: // EXC_MACH_SYSCALL |
| 532 | case 9: // EXC_RPC_ALERT |
| 533 | case 10: // EXC_CRASH |
| 534 | break; |
| 535 | } |
| 536 | |
| 537 | return StopInfoSP(new StopInfoMachException(thread, exc_type, exc_data_count, |
| 538 | exc_code, exc_sub_code)); |
| 539 | } |