splhack added inline comments.
================ Comment at: lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp:592 if (data_sp->GetByteSize() < length) - data_sp = MapFileData(file, -1, file_offset); + data_sp = MapFileData(file, length, file_offset); if (data_sp) ---------------- bulbazord wrote: > A length of `-1` means "map the whole file", if my understanding is correct. > Why do we want to change this to `length` instead of just -1? Or is this > `file` the entire zip file? I'm now updating this diff to add comments to clarify the intention. For Android zip .so file (D152759), the ModuleSpec `spec` will have these info with this diff. - object offset = .so file offset inside the zip file - object size = .so file size PlatformAndroid requires this module spec to call DownloadModuleSlice in order to download the .so file from the zip file using adb shell dd. - file spec = "zip_path!/lib_path" - file offset = .so file offset inside the zip file == dd skip parameter - file size = .so file size == dd count parameter And ObjectFileELF will calculate CRC32 if the ELF does not have GNU BuildID, that will use the `data_sp` size. Which is set by `MapFileData`. Currently `-1` == the whole zip file size. (In fact, lldb-server is crashing due to SIGSEGV.) It is supposed to be the .so file size. In the unittest, the test .so file has CRC32 `7D6E4738`. And it should be the same for the file size. offset-test.bin contains -1024bytes of '\0' - liboffset-test.so (file offset = 1024, file size = 3600, CRC32 '7D6E4738') - 16bytes of '\0' Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D152757/new/ https://reviews.llvm.org/D152757 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits