| //===-- StopInfoMachException.cpp -------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "StopInfoMachException.h" |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/Breakpoint/Watchpoint.h" |
| #include "lldb/Core/ArchSpec.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Target/ExecutionContext.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Thread.h" |
| #include "lldb/Target/ThreadPlan.h" |
| #include "lldb/Target/UnixSignals.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| const char * |
| StopInfoMachException::GetDescription () |
| { |
| if (m_description.empty() && m_value != 0) |
| { |
| ExecutionContext exe_ctx (m_thread.shared_from_this()); |
| Target *target = exe_ctx.GetTargetPtr(); |
| const llvm::Triple::ArchType cpu = target ? target->GetArchitecture().GetMachine() : llvm::Triple::UnknownArch; |
| |
| const char *exc_desc = NULL; |
| const char *code_label = "code"; |
| const char *code_desc = NULL; |
| const char *subcode_label = "subcode"; |
| const char *subcode_desc = NULL; |
| switch (m_value) |
| { |
| case 1: // EXC_BAD_ACCESS |
| exc_desc = "EXC_BAD_ACCESS"; |
| subcode_label = "address"; |
| switch (cpu) |
| { |
| case llvm::Triple::arm: |
| switch (m_exc_code) |
| { |
| case 0x101: code_desc = "EXC_ARM_DA_ALIGN"; break; |
| case 0x102: code_desc = "EXC_ARM_DA_DEBUG"; break; |
| } |
| break; |
| |
| case llvm::Triple::ppc: |
| case llvm::Triple::ppc64: |
| switch (m_exc_code) |
| { |
| case 0x101: code_desc = "EXC_PPC_VM_PROT_READ"; break; |
| case 0x102: code_desc = "EXC_PPC_BADSPACE"; break; |
| case 0x103: code_desc = "EXC_PPC_UNALIGNED"; break; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| break; |
| |
| case 2: // EXC_BAD_INSTRUCTION |
| exc_desc = "EXC_BAD_INSTRUCTION"; |
| switch (cpu) |
| { |
| case llvm::Triple::x86: |
| case llvm::Triple::x86_64: |
| if (m_exc_code == 1) |
| code_desc = "EXC_I386_INVOP"; |
| break; |
| |
| case llvm::Triple::ppc: |
| case llvm::Triple::ppc64: |
| switch (m_exc_code) |
| { |
| case 1: code_desc = "EXC_PPC_INVALID_SYSCALL"; break; |
| case 2: code_desc = "EXC_PPC_UNIPL_INST"; break; |
| case 3: code_desc = "EXC_PPC_PRIVINST"; break; |
| case 4: code_desc = "EXC_PPC_PRIVREG"; break; |
| case 5: code_desc = "EXC_PPC_TRACE"; break; |
| case 6: code_desc = "EXC_PPC_PERFMON"; break; |
| } |
| break; |
| |
| case llvm::Triple::arm: |
| if (m_exc_code == 1) |
| code_desc = "EXC_ARM_UNDEFINED"; |
| break; |
| |
| default: |
| break; |
| } |
| break; |
| |
| case 3: // EXC_ARITHMETIC |
| exc_desc = "EXC_ARITHMETIC"; |
| switch (cpu) |
| { |
| case llvm::Triple::x86: |
| case llvm::Triple::x86_64: |
| switch (m_exc_code) |
| { |
| case 1: code_desc = "EXC_I386_DIV"; break; |
| case 2: code_desc = "EXC_I386_INTO"; break; |
| case 3: code_desc = "EXC_I386_NOEXT"; break; |
| case 4: code_desc = "EXC_I386_EXTOVR"; break; |
| case 5: code_desc = "EXC_I386_EXTERR"; break; |
| case 6: code_desc = "EXC_I386_EMERR"; break; |
| case 7: code_desc = "EXC_I386_BOUND"; break; |
| case 8: code_desc = "EXC_I386_SSEEXTERR"; break; |
| } |
| break; |
| |
| case llvm::Triple::ppc: |
| case llvm::Triple::ppc64: |
| switch (m_exc_code) |
| { |
| case 1: code_desc = "EXC_PPC_OVERFLOW"; break; |
| case 2: code_desc = "EXC_PPC_ZERO_DIVIDE"; break; |
| case 3: code_desc = "EXC_PPC_FLT_INEXACT"; break; |
| case 4: code_desc = "EXC_PPC_FLT_ZERO_DIVIDE"; break; |
| case 5: code_desc = "EXC_PPC_FLT_UNDERFLOW"; break; |
| case 6: code_desc = "EXC_PPC_FLT_OVERFLOW"; break; |
| case 7: code_desc = "EXC_PPC_FLT_NOT_A_NUMBER"; break; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| break; |
| |
| case 4: // EXC_EMULATION |
| exc_desc = "EXC_EMULATION"; |
| break; |
| |
| |
| case 5: // EXC_SOFTWARE |
| exc_desc = "EXC_SOFTWARE"; |
| if (m_exc_code == 0x10003) |
| { |
| subcode_desc = "EXC_SOFT_SIGNAL"; |
| subcode_label = "signo"; |
| } |
| break; |
| |
| case 6: // EXC_BREAKPOINT |
| { |
| exc_desc = "EXC_BREAKPOINT"; |
| switch (cpu) |
| { |
| case llvm::Triple::x86: |
| case llvm::Triple::x86_64: |
| switch (m_exc_code) |
| { |
| case 1: code_desc = "EXC_I386_SGL"; break; |
| case 2: code_desc = "EXC_I386_BPT"; break; |
| } |
| break; |
| |
| case llvm::Triple::ppc: |
| case llvm::Triple::ppc64: |
| switch (m_exc_code) |
| { |
| case 1: code_desc = "EXC_PPC_BREAKPOINT"; break; |
| } |
| break; |
| |
| case llvm::Triple::arm: |
| switch (m_exc_code) |
| { |
| case 0x101: code_desc = "EXC_ARM_DA_ALIGN"; break; |
| case 0x102: code_desc = "EXC_ARM_DA_DEBUG"; break; |
| case 1: code_desc = "EXC_ARM_BREAKPOINT"; break; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| break; |
| |
| case 7: |
| exc_desc = "EXC_SYSCALL"; |
| break; |
| |
| case 8: |
| exc_desc = "EXC_MACH_SYSCALL"; |
| break; |
| |
| case 9: |
| exc_desc = "EXC_RPC_ALERT"; |
| break; |
| |
| case 10: |
| exc_desc = "EXC_CRASH"; |
| break; |
| } |
| |
| StreamString strm; |
| |
| if (exc_desc) |
| strm.PutCString(exc_desc); |
| else |
| strm.Printf("EXC_??? (%llu)", m_value); |
| |
| if (m_exc_data_count >= 1) |
| { |
| if (code_desc) |
| strm.Printf(" (%s=%s", code_label, code_desc); |
| else |
| strm.Printf(" (%s=%llu", code_label, m_exc_code); |
| } |
| |
| if (m_exc_data_count >= 2) |
| { |
| if (subcode_desc) |
| strm.Printf(", %s=%s", subcode_label, subcode_desc); |
| else |
| strm.Printf(", %s=0x%llx", subcode_label, m_exc_subcode); |
| } |
| |
| if (m_exc_data_count > 0) |
| strm.PutChar(')'); |
| |
| m_description.swap (strm.GetString()); |
| } |
| return m_description.c_str(); |
| } |
| |
| |
| StopInfoSP |
| StopInfoMachException::CreateStopReasonWithMachException |
| ( |
| Thread &thread, |
| uint32_t exc_type, |
| uint32_t exc_data_count, |
| uint64_t exc_code, |
| uint64_t exc_sub_code, |
| uint64_t exc_sub_sub_code |
| ) |
| { |
| if (exc_type != 0) |
| { |
| ExecutionContext exe_ctx (thread.shared_from_this()); |
| Target *target = exe_ctx.GetTargetPtr(); |
| const llvm::Triple::ArchType cpu = target ? target->GetArchitecture().GetMachine() : llvm::Triple::UnknownArch; |
| |
| switch (exc_type) |
| { |
| case 1: // EXC_BAD_ACCESS |
| break; |
| |
| case 2: // EXC_BAD_INSTRUCTION |
| switch (cpu) |
| { |
| case llvm::Triple::ppc: |
| case llvm::Triple::ppc64: |
| switch (exc_code) |
| { |
| case 1: // EXC_PPC_INVALID_SYSCALL |
| case 2: // EXC_PPC_UNIPL_INST |
| case 3: // EXC_PPC_PRIVINST |
| case 4: // EXC_PPC_PRIVREG |
| break; |
| case 5: // EXC_PPC_TRACE |
| return StopInfo::CreateStopReasonToTrace (thread); |
| case 6: // EXC_PPC_PERFMON |
| break; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| break; |
| |
| case 3: // EXC_ARITHMETIC |
| case 4: // EXC_EMULATION |
| break; |
| |
| case 5: // EXC_SOFTWARE |
| if (exc_code == 0x10003) // EXC_SOFT_SIGNAL |
| return StopInfo::CreateStopReasonWithSignal (thread, exc_sub_code); |
| break; |
| |
| case 6: // EXC_BREAKPOINT |
| { |
| bool is_software_breakpoint = false; |
| switch (cpu) |
| { |
| case llvm::Triple::x86: |
| case llvm::Triple::x86_64: |
| if (exc_code == 1) // EXC_I386_SGL |
| { |
| if (!exc_sub_code) |
| return StopInfo::CreateStopReasonToTrace(thread); |
| |
| // It's a watchpoint, then. |
| // The exc_sub_code indicates the data break address. |
| lldb::WatchpointSP wp_sp; |
| if (target) |
| wp_sp = target->GetWatchpointList().FindByAddress((lldb::addr_t)exc_sub_code); |
| if (wp_sp && wp_sp->IsEnabled()) |
| { |
| // Debugserver may piggyback the hardware index of the fired watchpoint in the exception data. |
| // Set the hardware index if that's the case. |
| if (exc_data_count >=3) |
| wp_sp->SetHardwareIndex((uint32_t)exc_sub_sub_code); |
| return StopInfo::CreateStopReasonWithWatchpointID(thread, wp_sp->GetID()); |
| } |
| } |
| else if (exc_code == 2) // EXC_I386_BPT |
| { |
| is_software_breakpoint = true; |
| } |
| break; |
| |
| case llvm::Triple::ppc: |
| case llvm::Triple::ppc64: |
| is_software_breakpoint = exc_code == 1; // EXC_PPC_BREAKPOINT |
| break; |
| |
| case llvm::Triple::arm: |
| if (exc_code == 0x102) |
| { |
| // It's a watchpoint, then, if the exc_sub_code indicates a known/enabled |
| // data break address from our watchpoint list. |
| lldb::WatchpointSP wp_sp; |
| if (target) |
| wp_sp = target->GetWatchpointList().FindByAddress((lldb::addr_t)exc_sub_code); |
| if (wp_sp && wp_sp->IsEnabled()) |
| { |
| // Debugserver may piggyback the hardware index of the fired watchpoint in the exception data. |
| // Set the hardware index if that's the case. |
| if (exc_data_count >=3) |
| wp_sp->SetHardwareIndex((uint32_t)exc_sub_sub_code); |
| return StopInfo::CreateStopReasonWithWatchpointID(thread, wp_sp->GetID()); |
| } |
| // EXC_ARM_DA_DEBUG seems to be reused for EXC_BREAKPOINT as well as EXC_BAD_ACCESS |
| return StopInfo::CreateStopReasonToTrace(thread); |
| } |
| else |
| is_software_breakpoint = exc_code == 1; // EXC_ARM_BREAKPOINT |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (is_software_breakpoint) |
| { |
| addr_t pc = thread.GetRegisterContext()->GetPC(); |
| ProcessSP process_sp (thread.CalculateProcess()); |
| |
| lldb::BreakpointSiteSP bp_site_sp; |
| if (process_sp) |
| bp_site_sp = process_sp->GetBreakpointSiteList().FindByAddress(pc); |
| if (bp_site_sp) |
| { |
| // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, |
| // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that |
| // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. |
| if (bp_site_sp->ValidForThisThread (&thread)) |
| return StopInfo::CreateStopReasonWithBreakpointSiteID (thread, bp_site_sp->GetID()); |
| else |
| return StopInfoSP(); |
| } |
| else if (cpu == llvm::Triple::arm) |
| { |
| return StopInfo::CreateStopReasonToTrace (thread); |
| } |
| } |
| } |
| break; |
| |
| case 7: // EXC_SYSCALL |
| case 8: // EXC_MACH_SYSCALL |
| case 9: // EXC_RPC_ALERT |
| case 10: // EXC_CRASH |
| break; |
| } |
| |
| return StopInfoSP(new StopInfoMachException (thread, exc_type, exc_data_count, exc_code, exc_sub_code)); |
| } |
| return StopInfoSP(); |
| } |
