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Diffstat (limited to 'lib/DebugInfo/GSYM/FunctionInfo.cpp')
-rw-r--r--lib/DebugInfo/GSYM/FunctionInfo.cpp143
1 files changed, 134 insertions, 9 deletions
diff --git a/lib/DebugInfo/GSYM/FunctionInfo.cpp b/lib/DebugInfo/GSYM/FunctionInfo.cpp
index 55c36a55b4be..ad022fec9e32 100644
--- a/lib/DebugInfo/GSYM/FunctionInfo.cpp
+++ b/lib/DebugInfo/GSYM/FunctionInfo.cpp
@@ -1,22 +1,147 @@
-//===- FunctionInfo.cpp -----------------------------------------*- C++ -*-===//
+//===- FunctionInfo.cpp ---------------------------------------------------===//
//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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/FunctionInfo.h"
+#include "llvm/DebugInfo/GSYM/FileWriter.h"
+#include "llvm/DebugInfo/GSYM/LineTable.h"
+#include "llvm/DebugInfo/GSYM/InlineInfo.h"
+#include "llvm/Support/DataExtractor.h"
using namespace llvm;
using namespace gsym;
+/// FunctionInfo information type that is used to encode the optional data
+/// that is associated with a FunctionInfo object.
+enum InfoType : uint32_t {
+ EndOfList = 0u,
+ LineTableInfo = 1u,
+ InlineInfo = 2u
+};
+
raw_ostream &llvm::gsym::operator<<(raw_ostream &OS, const FunctionInfo &FI) {
OS << '[' << HEX64(FI.Range.Start) << '-' << HEX64(FI.Range.End) << "): "
- << "Name=" << HEX32(FI.Name) << '\n';
- for (const auto &Line : FI.Lines)
- OS << Line << '\n';
- OS << FI.Inline;
+ << "Name=" << HEX32(FI.Name) << '\n' << FI.OptLineTable << FI.Inline;
return OS;
}
+
+llvm::Expected<FunctionInfo> FunctionInfo::decode(DataExtractor &Data,
+ uint64_t BaseAddr) {
+ FunctionInfo FI;
+ FI.Range.Start = BaseAddr;
+ uint64_t Offset = 0;
+ if (!Data.isValidOffsetForDataOfSize(Offset, 4))
+ return createStringError(std::errc::io_error,
+ "0x%8.8" PRIx64 ": missing FunctionInfo Size", Offset);
+ FI.Range.End = FI.Range.Start + Data.getU32(&Offset);
+ if (!Data.isValidOffsetForDataOfSize(Offset, 4))
+ return createStringError(std::errc::io_error,
+ "0x%8.8" PRIx64 ": missing FunctionInfo Name", Offset);
+ FI.Name = Data.getU32(&Offset);
+ if (FI.Name == 0)
+ return createStringError(std::errc::io_error,
+ "0x%8.8" PRIx64 ": invalid FunctionInfo Name value 0x%8.8x",
+ Offset - 4, FI.Name);
+ bool Done = false;
+ while (!Done) {
+ if (!Data.isValidOffsetForDataOfSize(Offset, 4))
+ return createStringError(std::errc::io_error,
+ "0x%8.8" PRIx64 ": missing FunctionInfo InfoType value", Offset);
+ const uint32_t IT = Data.getU32(&Offset);
+ if (!Data.isValidOffsetForDataOfSize(Offset, 4))
+ return createStringError(std::errc::io_error,
+ "0x%8.8" PRIx64 ": missing FunctionInfo InfoType length", Offset);
+ const uint32_t InfoLength = Data.getU32(&Offset);
+ if (!Data.isValidOffsetForDataOfSize(Offset, InfoLength))
+ return createStringError(std::errc::io_error,
+ "0x%8.8" PRIx64 ": missing FunctionInfo data for InfoType %u",
+ Offset, IT);
+ DataExtractor InfoData(Data.getData().substr(Offset, InfoLength),
+ Data.isLittleEndian(),
+ Data.getAddressSize());
+ switch (IT) {
+ case InfoType::EndOfList:
+ Done = true;
+ break;
+
+ case InfoType::LineTableInfo:
+ if (Expected<LineTable> LT = LineTable::decode(InfoData, BaseAddr))
+ FI.OptLineTable = std::move(LT.get());
+ else
+ return LT.takeError();
+ break;
+
+ case InfoType::InlineInfo:
+ if (Expected<InlineInfo> II = InlineInfo::decode(InfoData, BaseAddr))
+ FI.Inline = std::move(II.get());
+ else
+ return II.takeError();
+ break;
+
+ default:
+ return createStringError(std::errc::io_error,
+ "0x%8.8" PRIx64 ": unsupported InfoType %u",
+ Offset-8, IT);
+ }
+ Offset += InfoLength;
+ }
+ return std::move(FI);
+}
+
+llvm::Expected<uint64_t> FunctionInfo::encode(FileWriter &O) const {
+ if (!isValid())
+ return createStringError(std::errc::invalid_argument,
+ "attempted to encode invalid FunctionInfo object");
+ // Align FunctionInfo data to a 4 byte alignment.
+ O.alignTo(4);
+ const uint64_t FuncInfoOffset = O.tell();
+ // Write the size in bytes of this function as a uint32_t. This can be zero
+ // if we just have a symbol from a symbol table and that symbol has no size.
+ O.writeU32(size());
+ // Write the name of this function as a uint32_t string table offset.
+ O.writeU32(Name);
+
+ if (OptLineTable.hasValue()) {
+ O.writeU32(InfoType::LineTableInfo);
+ // Write a uint32_t length as zero for now, we will fix this up after
+ // writing the LineTable out with the number of bytes that were written.
+ O.writeU32(0);
+ const auto StartOffset = O.tell();
+ llvm::Error err = OptLineTable->encode(O, Range.Start);
+ if (err)
+ return std::move(err);
+ const off_t Length = O.tell() - StartOffset;
+ if (Length > UINT32_MAX)
+ return createStringError(std::errc::invalid_argument,
+ "LineTable length is greater than UINT32_MAX");
+ // Fixup the size of the LineTable data with the correct size.
+ O.fixup32(static_cast<uint32_t>(Length), StartOffset - 4);
+ }
+
+ // Write out the inline function info if we have any and if it is valid.
+ if (Inline.hasValue()) {
+ O.writeU32(InfoType::InlineInfo);
+ // Write a uint32_t length as zero for now, we will fix this up after
+ // writing the LineTable out with the number of bytes that were written.
+ O.writeU32(0);
+ const auto StartOffset = O.tell();
+ llvm::Error err = Inline->encode(O, Range.Start);
+ if (err)
+ return std::move(err);
+ const off_t Length = O.tell() - StartOffset;
+ if (Length > UINT32_MAX)
+ return createStringError(std::errc::invalid_argument,
+ "InlineInfo length is greater than UINT32_MAX");
+ // Fixup the size of the InlineInfo data with the correct size.
+ O.fixup32(static_cast<uint32_t>(Length), StartOffset - 4);
+ }
+
+ // Terminate the data chunks with and end of list with zero size
+ O.writeU32(InfoType::EndOfList);
+ O.writeU32(0);
+ return FuncInfoOffset;
+}