search for: object_path_lto

...not even pulled into the link command so the static library is not even in the snapshot. From the link command in the snapshot, the static library is not on the command line from snapshot: /Applications/Xcode-11.3.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -Z -demangle -object_path_lto /var/folders/5c/85r7gp0909j5jbytzds1j7b40000gn/T/thinlto-bf51d2 -lto_library data_files/libLTO.dylib -no_deduplicate -dynamic -arch x86_64 -macosx_version_min 10.15.0 -debug_snapshot -filelist objects/filelist dylibs/libSystem.tbd dylibs/libc++.tbd Steven > On Jul 22, 2020, at 11:42 AM, Tobi...

...you can see that src/.libs/libogg.a is passed to the command line and even when running verbose clang I can see that clang invokes the linker with libogg.a on the line: > > "/Applications/Xcode-11.3.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld" -demangle -object_path_lto /var/folders/5c/85r7gp0909j5jbytzds1j7b40000gn/T/thinlto-74963a -lto_library /Applications/Xcode-11.3.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libLTO.dylib -no_deduplicate -dynamic -arch x86_64 -macosx_version_min 10.15.0 -syslibroot /Applications/Xcode.app/Contents/Develo...

This is usually a problem that is not using llvm-ar. I cannot reproduce this problem with either llvm 10.0 or TOT version. Which linker version are you using? You can also try pass "-Wl,-debug_snapshot" to the command where the error produces and then locate the "*.ld-snapshot" in /tmp directory and attach that as a reproducer. Steven > On Jul 22, 2020, at 8:41 AM, Teresa

...ked binary (in fact the map won’t mention these at all and that’s how the utility knows that they have been dropped). > b) How will it work with LTO ? With LTO you have to get access to the object file generated by the LTO link to be able to extract its debug info. ld64 has an option for that (-object_path_lto) that instructs it to write out the object file in the given path rather than /tmp/lto.o, and to not delete it when it has finished the link. It is then the build system’s duty to delete this temporary file once it has run dsymutil on the binary. This is cumbersome and is one of the reasons why the...

...t; In my memory a ThinLTO build of LLVM does use a single cache and share and reuse objects across binaries if possible. I think you are correct. We can actually share the LTO cache. I thought I once investigated an issue about sharing lto_cache but when I dig it out, I realize it is about sharing object_path_lto. My mistake. On UNIX, the cached output is valid once it is opened. Pruning the cache or rename the file will not invalidate the content. Then I guess Katya's summary is accurate. We do have Problem #1, #2, #3. Problem #4 will only cause cache misses not really failures. I think the easiest f...

...s? In my memory a ThinLTO build of LLVM does use a single cache and share and reuse objects across binaries if possible. I think you are correct. We can actually share the LTO cache. I thought I once investigated an issue about sharing lto_cache but when I dig it out, I realize it is about sharing object_path_lto. My mistake. On UNIX, the cached output is valid once it is opened. Pruning the cache or rename the file will not invalidate the content. Then I guess Katya's summary is accurate. We do have Problem #1, #2, #3. Problem #4 will only cause cache misses not really failures. I think the easiest f...

Le jeu. 22 mars 2018 à 16:46, Steven Wu <stevenwu at apple.com> a écrit : > Hi Katya > > Thanks for investigating this. Here is my thought inline. > > On Mar 22, 2018, at 1:32 AM, katya.romanova at sony.com wrote: > > > Hello, > > I am sending the following proposal to discuss issues and solutions > regarding data races in concurrent ThinLTO processes. >

Hi, [ I Cc'd lld people and debug info people. Apologies if I omitted some stakeholder. ] As stated in the subject, I’d like to start working on an in-tree reimplementation of Darwin’s dsymutil utility. This is an initial step on the path to having lld handle the debug information itself. For those who are not familiar with the debug flow on MacOS, dsymutil is a DWARF linker. Darwin’s