[Lldb-commits] [lldb] r318577 - [ABI/SysV] Remove more dead code. NFCI.

[Davide Italiano via lldb-commits]

Author: davide
Date: Fri Nov 17 16:35:27 2017
New Revision: 318577

URL: http://llvm.org/viewvc/llvm-project?rev=318577&view=rev
Log:
[ABI/SysV] Remove more dead code. NFCI.

Modified:
    lldb/trunk/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp

Modified: lldb/trunk/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp?rev=318577&r1=318576&r2=318577&view=diff
==============================================================================
--- lldb/trunk/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp (original)
+++ lldb/trunk/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp Fri Nov 17 16:35:27 2017
@@ -1161,48 +1161,6 @@ bool ABISysV_x86_64::PrepareTrivialCall(
   ProcessSP process_sp(thread.GetProcess());
 
   RegisterValue reg_value;
-
-#if 0
-    // This code adds an extra frame so that we don't lose the function that we came from
-    // by pushing the PC and the FP and then writing the current FP to point to the FP value
-    // we just pushed. It is disabled for now until the stack backtracing code can be debugged.
-
-    // Save current PC
-    const RegisterInfo *fp_reg_info = reg_ctx->GetRegisterInfo (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP);
-    if (reg_ctx->ReadRegister(pc_reg_info, reg_value))
-    {
-        if (log)
-            log->Printf("Pushing the current PC onto the stack: 0x%" PRIx64 ": 0x%" PRIx64, (uint64_t)sp, reg_value.GetAsUInt64());
-        
-        if (!process_sp->WritePointerToMemory(sp, reg_value.GetAsUInt64(), error))
-            return false;
-
-        sp -= 8;
-        
-        // Save current FP
-        if (reg_ctx->ReadRegister(fp_reg_info, reg_value))
-        {
-            if (log)
-                log->Printf("Pushing the current FP onto the stack: 0x%" PRIx64 ": 0x%" PRIx64, (uint64_t)sp, reg_value.GetAsUInt64());
-            
-            if (!process_sp->WritePointerToMemory(sp, reg_value.GetAsUInt64(), error))
-                return false;
-        }
-        // Setup FP backchain
-        reg_value.SetUInt64 (sp);
-        
-        if (log)
-            log->Printf("Writing FP:  0x%" PRIx64 " (for FP backchain)", reg_value.GetAsUInt64());
-
-        if (!reg_ctx->WriteRegister(fp_reg_info, reg_value))
-        {
-            return false;
-        }
-        
-        sp -= 8;
-    }
-#endif
-
   if (log)
     log->Printf("Pushing the return address onto the stack: 0x%" PRIx64
                 ": 0x%" PRIx64,