Initial checkin of lldb code from internal Apple repo.

llvm-svn: 105619
2026-01-16 21:55:39 +08:00 · 2010-06-08 16:52:24 +00:00
parent 312c4c799d
commit 30fdc8d841
790 changed files with 216273 additions and 0 deletions
--- a/lldb/source/Target/ThreadPlanStepOverBreakpoint.cpp
+++ b/lldb/source/Target/ThreadPlanStepOverBreakpoint.cpp
@@ -0,0 +1,130 @@
+//===-- ThreadPlanStepOverBreakpoint.cpp ------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Target/ThreadPlanStepOverBreakpoint.h"
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/lldb-private-log.h"
+#include "lldb/Core/Log.h"
+#include "lldb/Core/Stream.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+//----------------------------------------------------------------------
+// ThreadPlanStepOverBreakpoint: Single steps over a breakpoint bp_site_sp at the pc.
+//----------------------------------------------------------------------
+
+ThreadPlanStepOverBreakpoint::ThreadPlanStepOverBreakpoint (Thread &thread) :
+    ThreadPlan ("Step over breakpoint trap",
+                thread,
+                eVoteNo,
+                eVoteNoOpinion),  // We need to report the run since this happens
+                            // first in the thread plan stack when stepping
+                            // over a breakpoint
+    m_breakpoint_addr (LLDB_INVALID_ADDRESS)
+{
+    m_breakpoint_addr = m_thread.GetRegisterContext()->GetPC();
+    m_breakpoint_site_id =  m_thread.GetProcess().GetBreakpointSiteList().FindIDByAddress (m_breakpoint_addr);
+
+}
+
+ThreadPlanStepOverBreakpoint::~ThreadPlanStepOverBreakpoint ()
+{
+}
+
+void
+ThreadPlanStepOverBreakpoint::GetDescription (Stream *s, lldb::DescriptionLevel level)
+{
+    s->Printf("Single stepping past breakpoint site %d at 0x%llx", m_breakpoint_site_id, (uint64_t)m_breakpoint_addr);
+}
+
+bool
+ThreadPlanStepOverBreakpoint::ValidatePlan (Stream *error)
+{
+    return true;
+}
+
+bool
+ThreadPlanStepOverBreakpoint::PlanExplainsStop ()
+{
+    return true;
+}
+
+bool
+ThreadPlanStepOverBreakpoint::ShouldStop (Event *event_ptr)
+{
+    return false;
+}
+
+bool
+ThreadPlanStepOverBreakpoint::StopOthers ()
+{
+    return true;
+}
+
+StateType
+ThreadPlanStepOverBreakpoint::RunState ()
+{
+    return eStateStepping;
+}
+
+bool
+ThreadPlanStepOverBreakpoint::WillResume (StateType resume_state, bool current_plan)
+{
+    ThreadPlan::WillResume (resume_state, current_plan);
+
+    if (current_plan)
+    {
+        BreakpointSiteSP bp_site_sp (m_thread.GetProcess().GetBreakpointSiteList().FindByAddress (m_breakpoint_addr));
+        if (bp_site_sp  && bp_site_sp->IsEnabled())
+            m_thread.GetProcess().DisableBreakpoint (bp_site_sp.get());
+    }
+    return true;
+}
+
+bool
+ThreadPlanStepOverBreakpoint::WillStop ()
+{
+    BreakpointSiteSP bp_site_sp (m_thread.GetProcess().GetBreakpointSiteList().FindByAddress (m_breakpoint_addr));
+    if (bp_site_sp)
+        m_thread.GetProcess().EnableBreakpoint (bp_site_sp.get());
+    return true;
+}
+
+bool
+ThreadPlanStepOverBreakpoint::MischiefManaged ()
+{
+    lldb::addr_t pc_addr = m_thread.GetRegisterContext()->GetPC();
+
+    if (pc_addr == m_breakpoint_addr)
+    {
+        // If we are still at the PC of our breakpoint, then for some reason we didn't
+        // get a chance to run.
+        return false;
+    }
+    else
+    {
+        Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP);
+        if (log)
+            log->Printf("Completed step over breakpoint plan.");
+        // Otherwise, re-enable the breakpoint we were stepping over, and we're done.
+        BreakpointSiteSP bp_site_sp (m_thread.GetProcess().GetBreakpointSiteList().FindByAddress (m_breakpoint_addr));
+        if (bp_site_sp)
+            m_thread.GetProcess().EnableBreakpoint (bp_site_sp.get());
+        ThreadPlan::MischiefManaged ();
+        return true;
+    }
+}
+