StopInfoMachException.cpp [plain text]
#include "StopInfoMachException.h"
#include "lldb/Breakpoint/Watchpoint.h"
#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Target/DynamicLoader.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_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_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_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_desc = "EXC_EMULATION";
break;
case 5: exc_desc = "EXC_SOFTWARE";
if (m_exc_code == 0x10003)
{
subcode_desc = "EXC_SOFT_SIGNAL";
subcode_label = "signo";
}
break;
case 6: {
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_??? (%" PRIu64 ")", m_value);
if (m_exc_data_count >= 1)
{
if (code_desc)
strm.Printf(" (%s=%s", code_label, code_desc);
else
strm.Printf(" (%s=%" PRIu64, 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%" PRIx64, 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,
bool pc_already_adjusted,
bool adjust_pc_if_needed
)
{
if (exc_type != 0)
{
uint32_t pc_decrement = 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: break;
case 2: switch (cpu)
{
case llvm::Triple::ppc:
case llvm::Triple::ppc64:
switch (exc_code)
{
case 1: case 2: case 3: case 4: break;
case 5: return StopInfo::CreateStopReasonToTrace (thread);
case 6: break;
}
break;
default:
break;
}
break;
case 3: case 4: break;
case 5: if (exc_code == 0x10003) {
if (exc_sub_code == 5)
{
ProcessSP process_sp (thread.GetProcess());
if (process_sp)
{
DynamicLoader *dynamic_loader = process_sp->GetDynamicLoader();
if (dynamic_loader && dynamic_loader->ProcessDidExec())
{
return StopInfo::CreateStopReasonWithExec (thread);
}
}
}
return StopInfo::CreateStopReasonWithSignal (thread, exc_sub_code);
}
break;
case 6: {
bool is_software_breakpoint = false;
bool is_trace_if_software_breakpoint_missing = false;
switch (cpu)
{
case llvm::Triple::x86:
case llvm::Triple::x86_64:
if (exc_code == 1) {
if (!exc_sub_code)
return StopInfo::CreateStopReasonToTrace(thread);
lldb::WatchpointSP wp_sp;
if (target)
wp_sp = target->GetWatchpointList().FindByAddress((lldb::addr_t)exc_sub_code);
if (wp_sp && wp_sp->IsEnabled())
{
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_code == 3) {
if (exc_code == 3)
is_trace_if_software_breakpoint_missing = true;
is_software_breakpoint = true;
if (!pc_already_adjusted)
pc_decrement = 1;
}
break;
case llvm::Triple::ppc:
case llvm::Triple::ppc64:
is_software_breakpoint = exc_code == 1; break;
case llvm::Triple::arm:
if (exc_code == 0x102)
{
lldb::WatchpointSP wp_sp;
if (target)
wp_sp = target->GetWatchpointList().FindByAddress((lldb::addr_t)exc_sub_code);
if (wp_sp && wp_sp->IsEnabled())
{
if (exc_data_count >=3)
wp_sp->SetHardwareIndex((uint32_t)exc_sub_sub_code);
return StopInfo::CreateStopReasonWithWatchpointID(thread, wp_sp->GetID());
}
if (thread.GetTemporaryResumeState() == eStateStepping)
return StopInfo::CreateStopReasonToTrace(thread);
}
else if (exc_code == 1)
{
is_software_breakpoint = true;
is_trace_if_software_breakpoint_missing = true;
}
break;
default:
break;
}
if (is_software_breakpoint)
{
RegisterContextSP reg_ctx_sp (thread.GetRegisterContext());
addr_t pc = reg_ctx_sp->GetPC() - pc_decrement;
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 && bp_site_sp->IsEnabled())
{
if (pc_decrement > 0 && adjust_pc_if_needed)
reg_ctx_sp->SetPC (pc);
if (bp_site_sp->ValidForThisThread (&thread))
return StopInfo::CreateStopReasonWithBreakpointSiteID (thread, bp_site_sp->GetID());
else
return StopInfoSP();
}
if (is_trace_if_software_breakpoint_missing && thread.GetTemporaryResumeState() == eStateStepping)
{
return StopInfo::CreateStopReasonToTrace (thread);
}
}
}
break;
case 7: case 8: case 9: case 10: break;
}
return StopInfoSP(new StopInfoMachException (thread, exc_type, exc_data_count, exc_code, exc_sub_code));
}
return StopInfoSP();
}