[llvm] [GSYM] Callsites: Add data format support and loading from YAML (PR #109781)

[via llvm-commits]

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@@ -0,0 +1,263 @@
+//===- CallSiteInfo.cpp ----------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/GSYM/CallSiteInfo.h"
+#include "llvm/ADT/CachedHashString.h"
+#include "llvm/DebugInfo/GSYM/FileWriter.h"
+#include "llvm/DebugInfo/GSYM/FunctionInfo.h"
+#include "llvm/DebugInfo/GSYM/GsymCreator.h"
+#include "llvm/MC/StringTableBuilder.h"
+#include "llvm/Support/DataExtractor.h"
+#include "llvm/Support/YAMLParser.h"
+#include "llvm/Support/YAMLTraits.h"
+#include "llvm/Support/raw_ostream.h"
+#include <fstream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+using namespace llvm;
+using namespace gsym;
+
+Error CallSiteInfo::encode(FileWriter &O) const {
+  O.writeU64(ReturnAddress);
+  O.writeU8(Flags);
+  O.writeU32(MatchRegex.size());
+  for (uint32_t Entry : MatchRegex)
+    O.writeU32(Entry);
+  return Error::success();
+}
+
+Expected<CallSiteInfo> CallSiteInfo::decode(DataExtractor &Data,
+                                            uint64_t &Offset) {
+  CallSiteInfo CSI;
+
+  // Read ReturnAddress
+  if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(uint64_t)))
+    return createStringError(std::errc::io_error,
+                             "0x%8.8" PRIx64 ": missing ReturnAddress", Offset);
+  CSI.ReturnAddress = Data.getU64(&Offset);
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alx32 wrote:

Latest version has only relative offsets - no need for relocs.

https://github.com/llvm/llvm-project/pull/109781