Use general instruction/stack pointer convenience method instead of manually

src/processor/dump_context.cc

 // Copyright (c) 2010 Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 167 matching lines @@
     *ip = GetContextMIPS()->epc;
     break;
   default:
     // This should never happen.
     BPLOG(ERROR) << "Unknown CPU architecture in GetInstructionPointer";
     return false;
   }
   return true;
 }
 
+bool DumpContext::GetStackPointer(uint64_t* sp) const {
+  BPLOG_IF(ERROR, !sp) << "DumpContext::GetStackPointer requires |sp|";
+  assert(sp);
+  *sp = 0;
+
+  if (!valid_) {
+    BPLOG(ERROR) << "Invalid DumpContext for GetStackPointer";
+    return false;
+  }
+
+  switch (GetContextCPU()) {
+  case MD_CONTEXT_AMD64:
+    *sp = GetContextAMD64()->rsp;
+    break;
+  case MD_CONTEXT_ARM:
+    *sp = GetContextARM()->iregs[MD_CONTEXT_ARM_REG_SP];
+    break;
+  case MD_CONTEXT_ARM64:
+    *sp = GetContextARM64()->iregs[MD_CONTEXT_ARM64_REG_SP];
+    break;
+  case MD_CONTEXT_PPC:
+    *sp = GetContextPPC()->gpr[MD_CONTEXT_PPC_REG_SP];
+    break;
+  case MD_CONTEXT_PPC64:
+    *sp = GetContextPPC64()->gpr[MD_CONTEXT_PPC64_REG_SP];
+    break;
+  case MD_CONTEXT_SPARC:
+    *sp = GetContextSPARC()->g_r[MD_CONTEXT_SPARC_REG_SP];
+    break;
+  case MD_CONTEXT_X86:
+    *sp = GetContextX86()->esp;
+    break;
+  case MD_CONTEXT_MIPS:
+    *sp = GetContextMIPS()->iregs[MD_CONTEXT_MIPS_REG_SP];
+    break;
+  default:
+    // This should never happen.
+    BPLOG(ERROR) << "Unknown CPU architecture in GetStackPointer";
+    return false;
+  }
+  return true;
+}
+
 void DumpContext::SetContextFlags(uint32_t context_flags) {
   context_flags_ = context_flags;
 }
 
 void DumpContext::SetContextX86(MDRawContextX86* x86) {
   context_.x86 = x86;
 }
 
 void DumpContext::SetContextPPC(MDRawContextPPC* ppc) {
   context_.ppc = ppc;
@@ skipping 407 matching lines @@
       break;
     }
 
     default: {
       break;
     }
   }
 }
 
 }  // namespace google_breakpad