This patch adds the ability to encode and decode InlineInfo objects and adds test coverage. Error handling is introduced in the encoding and decoding which will be used from here on out for remaining patches.
Differential Revision: https://reviews.llvm.org/D66600
llvm-svn: 370936
The full GSYM patch started with: https://reviews.llvm.org/D53379
This patch add the ability to encode data using the new llvm::gsym::FileWriter class.
FileWriter is a simplified binary data writer class that doesn't require targets, target definitions, architectures, or require any other optional compile time libraries to be enabled via the build process. This class needs the ability to seek to different spots in the binary data that it produces to fix up offsets and sizes in GSYM data. It currently uses std::ostream over llvm::raw_ostream because llvm::raw_ostream doesn't support seeking which is required when encoding and decoding GSYM data.
AddressRange objects are encoded and decoded to be relative to a base address. This will be the FunctionInfo's start address if the AddressRange is directly contained in a FunctionInfo, or a base address of the containing parent AddressRange or AddressRanges. This allows address ranges to be efficiently encoded using ULEB128 encodings as we encode the offset and size of each range instead of full addresses. This also makes encoded addresses easy to relocate as we just need to relocate one base address.
Differential Revision: https://reviews.llvm.org/D63828
llvm-svn: 369587
Delete unnecessary getters of AddressRange.
Simplify AddressRange::size(): Start <= End check should be checked in an upper layer.
Delete isContiguousWith() that doesn't make sense.
Simplify AddressRanges::insert. Delete commented code. Fix it when more than 1 ranges are to be deleted.
Delete trailing newline.
llvm-svn: 364637
The full GSYM patch started with: https://reviews.llvm.org/D53379
In that patch we wanted to split up getting GSYM into the LLVM code base so we are not committing too much code at once.
This is a first in a series of patches where I only add the foundation classes along with complete unit tests. They provide the foundation for encoding and decoding a GSYM file.
File entries are defined in llvm::gsym::FileEntry. This class splits the file up into a directory and filename represented by uniqued string table offsets. This allows all files that are referred to in a GSYM file to be encoded as 1 based indexes into a global file table in the GSYM file.
Function information in stored in llvm::gsym::FunctionInfo. This object represents a contiguous address range that has a name and range with an optional line table and inline call stack information.
Line table entries are defined in llvm::gsym::LineEntry. They store only address, file and line information to keep the line tables simple and allows the information to be efficiently encoded in a subsequent patch.
Inline information is defined in llvm::gsym::InlineInfo. These structs store the name of the inline function, along with one or more address ranges, and the file and line that called this function. They also contain any child inline information.
There are also utility classes for address ranges in llvm::gsym::AddressRange, and string table support in llvm::gsym::StringTable which are simple classes.
The unit tests test all the APIs on these simple classes so they will be ready for the next patches where we will create GSYM files and parse GSYM files.
Differential Revision: https://reviews.llvm.org/D63104
llvm-svn: 364427
Greg Clayton