Abtracted the old "lldb_private::Thread::StopInfo" into an abtract class.
This will allow debugger plug-ins to make any instance of "lldb_private::StopInfo"
that can completely describe any stop reason. It also provides a framework for
doing intelligent things with the stop info at important times in the lifetime
of the inferior.
Examples include the signal stop info in StopInfoUnixSignal. It will check with
the process to see that the current action is for the signal. These actions
include wether to stop for the signal, wether the notify that the signal was
hit, and wether to pass the signal along to the inferior process. The
StopInfoUnixSignal class overrides the "ShouldStop()" method of StopInfo and
this allows the stop info to determine if it should stop at the signal or
continue the process.
StopInfo subclasses must override the following functions:
virtual lldb::StopReason
GetStopReason () const = 0;
virtual const char *
GetDescription () = 0;
StopInfo subclasses can override the following functions:
// If the subclass returns "false", the inferior will resume. The default
// version of this function returns "true" which means the default stop
// info will stop the process. The breakpoint subclass will check if
// the breakpoint wants us to stop by calling any installed callback on
// the breakpoint, and also checking if the breakpoint is for the current
// thread. Signals will check if they should stop based off of the
// UnixSignal settings in the process.
virtual bool
ShouldStop (Event *event_ptr);
// Sublasses can state if they want to notify the debugger when "ShouldStop"
// returns false. This would be handy for breakpoints where you want to
// log information and continue and is also used by the signal stop info
// to notify that a signal was received (after it checks with the process
// signal settings).
virtual bool
ShouldNotify (Event *event_ptr)
{
return false;
}
// Allow subclasses to do something intelligent right before we resume.
// The signal class will figure out if the signal should be propagated
// to the inferior process and pass that along to the debugger plug-ins.
virtual void
WillResume (lldb::StateType resume_state)
{
// By default, don't do anything
}
The support the Mach exceptions was moved into the lldb/source/Plugins/Process/Utility
folder and now doesn't polute the lldb_private::Thread class with platform
specific code.
git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@110184 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Plugins/Process/Utility/StopInfoMachException.cpp b/source/Plugins/Process/Utility/StopInfoMachException.cpp
new file mode 100644
index 0000000..c7e85f7
--- /dev/null
+++ b/source/Plugins/Process/Utility/StopInfoMachException.cpp
@@ -0,0 +1,344 @@
+//===-- 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/Core/ArchSpec.h"
+#include "lldb/Core/StreamString.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)
+ {
+ ArchSpec::CPU cpu = m_thread.GetProcess().GetTarget().GetArchitecture().GetGenericCPUType();
+
+ 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 ArchSpec::eCPU_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 ArchSpec::eCPU_ppc:
+ case ArchSpec::eCPU_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 ArchSpec::eCPU_i386:
+ case ArchSpec::eCPU_x86_64:
+ if (m_exc_code == 1)
+ code_desc = "EXC_I386_INVOP";
+ break;
+
+ case ArchSpec::eCPU_ppc:
+ case ArchSpec::eCPU_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 ArchSpec::eCPU_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 ArchSpec::eCPU_i386:
+ case ArchSpec::eCPU_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 ArchSpec::eCPU_ppc:
+ case ArchSpec::eCPU_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 ArchSpec::eCPU_i386:
+ case ArchSpec::eCPU_x86_64:
+ switch (m_exc_code)
+ {
+ case 1: subcode_desc = "EXC_I386_SGL"; break;
+ case 2: subcode_desc = "EXC_I386_BPT"; break;
+ }
+ break;
+
+ case ArchSpec::eCPU_ppc:
+ case ArchSpec::eCPU_ppc64:
+ switch (m_exc_code)
+ {
+ case 1: subcode_desc = "EXC_PPC_BREAKPOINT"; break;
+ }
+ break;
+
+ case ArchSpec::eCPU_arm:
+ switch (m_exc_code)
+ {
+ case 1: subcode_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
+)
+{
+ if (exc_type != 0)
+ {
+ ArchSpec::CPU cpu = thread.GetProcess().GetTarget().GetArchitecture().GetGenericCPUType();
+
+ switch (exc_type)
+ {
+ case 1: // EXC_BAD_ACCESS
+ break;
+
+ case 2: // EXC_BAD_INSTRUCTION
+ switch (cpu)
+ {
+ case ArchSpec::eCPU_ppc:
+ case ArchSpec::eCPU_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 ArchSpec::eCPU_i386:
+ case ArchSpec::eCPU_x86_64:
+ if (exc_code == 1) // EXC_I386_SGL
+ {
+ return StopInfo::CreateStopReasonToTrace(thread);
+ }
+ else if (exc_code == 2) // EXC_I386_BPT
+ {
+ is_software_breakpoint = true;
+ }
+ break;
+
+ case ArchSpec::eCPU_ppc:
+ case ArchSpec::eCPU_ppc64:
+ is_software_breakpoint = exc_code == 1; // EXC_PPC_BREAKPOINT
+ break;
+
+ case ArchSpec::eCPU_arm:
+ is_software_breakpoint = exc_code == 1; // EXC_ARM_BREAKPOINT
+ break;
+
+ default:
+ break;
+ }
+
+ if (is_software_breakpoint)
+ {
+ addr_t pc = thread.GetRegisterContext()->GetPC();
+ lldb::BreakpointSiteSP bp_site_sp = thread.GetProcess().GetBreakpointSiteList().FindByAddress(pc);
+ if (bp_site_sp)
+ {
+ if (bp_site_sp->ValidForThisThread (&thread))
+ return StopInfo::CreateStopReasonWithBreakpointSiteID (thread, bp_site_sp->GetID());
+ }
+ }
+ }
+ 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();
+}