From ad9a53c510343b65e30700ef2126734ca90ab0b0 Mon Sep 17 00:00:00 2001
From: Jason Molenda <jmolenda@apple.com>
Date: Fri, 26 Jul 2013 02:08:48 +0000
Subject: Add an SBFrame::FindRegister() method to make it a little easier to
 retrieve a register value.

llvm-svn: 187184
---
 lldb/source/API/SBFrame.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

(limited to 'lldb/source/API/SBFrame.cpp')

diff --git a/lldb/source/API/SBFrame.cpp b/lldb/source/API/SBFrame.cpp
index 282206066f7..409603a3b4e 100644
--- a/lldb/source/API/SBFrame.cpp
+++ b/lldb/source/API/SBFrame.cpp
@@ -1214,6 +1214,64 @@ SBFrame::GetRegisters ()
     return value_list;
 }
 
+SBValue
+SBFrame::FindRegister (const char *name)
+{
+    Log *log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
+
+    SBValue result;
+    ValueObjectSP value_sp;
+    Mutex::Locker api_locker;
+    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);
+
+    StackFrame *frame = NULL;
+    Target *target = exe_ctx.GetTargetPtr();
+    Process *process = exe_ctx.GetProcessPtr();
+    if (target && process)
+    {
+        Process::StopLocker stop_locker;
+        if (stop_locker.TryLock(&process->GetRunLock()))
+        {
+            frame = exe_ctx.GetFramePtr();
+            if (frame)
+            {
+                RegisterContextSP reg_ctx (frame->GetRegisterContext());
+                if (reg_ctx)
+                {
+                    const uint32_t num_regs = reg_ctx->GetRegisterCount();
+                    for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx)
+                    {
+                        const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex (reg_idx);
+                        if (reg_info && 
+                            ((reg_info->name && strcasecmp (reg_info->name, name) == 0) ||
+                             (reg_info->alt_name && strcasecmp (reg_info->alt_name, name) == 0)))
+                        {
+                            value_sp = ValueObjectRegister::Create (frame, reg_ctx, reg_idx);
+                            result.SetSP (value_sp);
+                            break;
+                        }
+                    }
+                }
+            }
+            else
+            {
+                if (log)
+                    log->Printf ("SBFrame::GetRegisterByName () => error: could not reconstruct frame object for this SBFrame.");
+            }
+        }
+        else
+        {
+            if (log)
+                log->Printf ("SBFrame::GetRegisterByName () => error: process is running");
+        }            
+    }
+
+    if (log)
+        log->Printf ("SBFrame(%p)::GetRegisterByName () => SBValue(%p)", frame, value_sp.get());
+
+    return result;
+}
+
 bool
 SBFrame::GetDescription (SBStream &description)
 {
-- 
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