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[lldb] Introduce new SymbolFileJSON and ObjectFileJSON Introduce a new object and symbol file format with the goal of mapping addresses to symbol names. I'd like to think of is as an extremely simple textual symtab. The file format consists of a triple, a UUID and a list of symbols. JSON is used for the encoding, but that's mostly an implementation detail. The goal of the format was to be simple and human readable. The new file format is motivated by two use cases: - Stripped binaries: when a binary is stripped, you lose the ability to do thing like setting symbolic breakpoints. You can keep the unstripped binary around, but if all you need is the stripped symbols then that's a lot of overhead. Instead, we could save the stripped symbols to a file and load them in the debugger when needed. I want to extend llvm-strip to have a mode where it emits this new file format. - Interactive crashlogs: with interactive crashlogs, if we don't have the binary or the dSYM for a particular module, we currently show an unnamed symbol for those frames. This is a regression compared to the textual format, that has these frames pre-symbolicated. Given that this information is available in the JSON crashlog, we need a way to tell LLDB about it. With the new symbol file format, we can easily synthesize a symbol file for each of those modules and load them to symbolicate those frames. Here's an example of the file format: { "triple": "arm64-apple-macosx13.0.0", "uuid": "36D0CCE7-8ED2-3CA3-96B0-48C1764DA908", "symbols": [ { "name": "main", "type": "code", "size": 32, "address": 4294983568 }, { "name": "foo", "type": "code", "size": 8, "address": 4294983560 } ] } Differential revision: https://reviews.llvm.org/D145180 | 3 年前 | |
[lldb] SymbolFileJSON: Update outdates Text -> JSON (NFC) Originally the symbol file format was going to textual, before we decided to use JSON. Updated the plugin name and the header guard. | 3 年前 | |
Add support for inline DWARF source files. (#75880) LLVM supports DWARF 5 linetable extension to store source files inline in DWARF. This is particularly useful for compiler-generated source code. This implementation tries to materialize them as temporary files lazily, so SBAPI clients don't need to be aware of them. rdar://110926168 | 2 年前 |
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