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//===-- 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)
{
// 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)
{
// 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();
}
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