embeded.S file was generated by a program called mksnapshot, if you're still want to debug it, you could try to build d8 with "ninja -C /your-path -v", and then you will see a command line which start with mksnapshot near the end of the build process. then you could debug mksnapshot with this command line.
Hope it helps you. On Wednesday, September 4, 2024 at 5:23:49 AM UTC+8 jgr...@chromium.org wrote: > These are bytestreams of the compiled builtins. The --print-builtin-code > d8 flag will show you the disassembled version. Hope that helps! > > On Thu, Aug 29, 2024 at 3:33 PM 18楼梦想改造家 <18.flo...@gmail.com> wrote: > >> Hi, anyone. >> >> I have a little question. When I read the v8 code, I found a file named >> `out\book\gen\embedded.S|`. there are some code like this: >> >> ``` c++ >> .def Builtins_DeoptimizationEntry_Eager; .scl 2; .type 32; .endef; >> .octa >> 0x4c110ff22404110ff200000080ec8148,0xff218245c110ff2102454110ff20824 >> ``` >> >> at here , octa is `0x4c110ff`... I want to know why it is this value. So >> I guess if I could debug the process which generate `|embedded.s|`, it will >> help me understand it. >> >> I found this function( embedded-file-writer.h - Chromium Code Search >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;l=76?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> >> ) >> ``` c++ >> void MaybeWriteEmbeddedFile >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;bpv=1;bpt=1;l=73?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc&gsn=MaybeWriteEmbeddedFile&gs=KYTHE%3A%2F%2Fkythe%3A%2F%2Fchromium.googlesource.com%2Fcodesearch%2Fchromium%2Fsrc%2F%2Fmain%3Flang%3Dc%252B%252B%3Fpath%3Dv8%2Fsrc%2Fsnapshot%2Fembedded%2Fembedded-file-writer.h%23tZuXKOZts5vj_MGjSfh_8QJGdiQbRpoTq-clSU0PZaQ> >> (const i::EmbeddedData >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-data.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=55>* >> >> blob >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;bpv=1;bpt=1;l=73?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc&gsn=blob&gs=KYTHE%3A%2F%2Fkythe%3A%2F%2Fchromium.googlesource.com%2Fcodesearch%2Fchromium%2Fsrc%2F%2Fmain%3Flang%3Dc%252B%252B%3Fpath%3Dv8%2Fsrc%2Fsnapshot%2Fembedded%2Fembedded-file-writer.h%23-wwERYue4ZcHsPJMUMEuYZNzCU0Mawftg6rV2xcAERM>) >> >> const { >> if (embedded_src_path_ >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=200?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> >> == nullptr) return; >> FILE >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;bpv=1;bpt=1;l=76?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc&gsn=FILE&gs=KYTHE%3A%2F%2FIvQBCnhreXRoZTovL2Nocm9taXVtLmdvb2dsZXNvdXJjZS5jb20vY29kZXNlYXJjaC9jaHJvbWl1bS9zcmMvL21haW4_bGFuZz1jJTJCJTJCI0hJOUdWT2xNVGpJWjV2VXV0ZFJ6aUpISm1YSE9MZU1QamRZMDV1Z2F5MUEKeGt5dGhlOi8vY2hyb21pdW0uZ29vZ2xlc291cmNlLmNvbS9jb2Rlc2VhcmNoL2Nocm9taXVtL3NyYy8vbWFpbj9sYW5nPWMlMkIlMkIjWWZXcnNzX2pxQVFjVjhnNGNVRWtwUlU1S0pXOHJ2eFE4aE1raTdFYmVYTQ%3D%3D>* >> >> fp >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;bpv=1;bpt=1;l=76?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc&gsn=fp&gs=KYTHE%3A%2F%2Fkythe%3A%2F%2Fchromium.googlesource.com%2Fcodesearch%2Fchromium%2Fsrc%2F%2Fmain%3Flang%3Dc%252B%252B%3Fpath%3Dv8%2Fsrc%2Fsnapshot%2Fembedded%2Fembedded-file-writer.h%23gaz0iDZ-kj4aERPHWMWbbibJ4sWlKRuQ25JWx1M_BSE> >> >> = GetFileDescriptorOrDie >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=91?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> (embedded_src_path_ >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=200?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc>); >> >> >> std::unique_ptr >> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/libc++/src/include/__memory/unique_ptr.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=126> >> <PlatformEmbeddedFileWriterBase >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/platform-embedded-file-writer-base.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=52>> >> >> writer >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;bpv=1;bpt=1;l=78?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc&gsn=writer&gs=KYTHE%3A%2F%2Fkythe%3A%2F%2Fchromium.googlesource.com%2Fcodesearch%2Fchromium%2Fsrc%2F%2Fmain%3Flang%3Dc%252B%252B%3Fpath%3Dv8%2Fsrc%2Fsnapshot%2Fembedded%2Fembedded-file-writer.h%23-giLviyUQfkQU3FYA5DqPMKt50I_4-98ff4Jz9XUi_4> >> >> = >> NewPlatformEmbeddedFileWriter >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/platform-embedded-file-writer-base.cc;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=158> >> (target_arch_ >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=209?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc>, >> >> target_os_ >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=210?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc>); >> >> >> writer >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=78?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> -> >> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/libc++/src/include/__memory/unique_ptr.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=260> >> SetFile >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/platform-embedded-file-writer-base.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=56> >> (fp >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=76?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc>); >> >> >> WriteFilePrologue >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=101?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> (writer >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=78?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> .get >> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/libc++/src/include/__memory/unique_ptr.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=261>()); >> >> >> WriteExternalFilenames >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=107?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> (writer >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=78?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> .get >> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/libc++/src/include/__memory/unique_ptr.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=261>()); >> >> >> WriteDataSection >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=145?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> (writer >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=78?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> .get >> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/libc++/src/include/__memory/unique_ptr.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=261>(), >> >> blob >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=73?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc>); >> >> >> WriteCodeSection >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.cc;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=136> >> (writer >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=78?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> .get >> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/libc++/src/include/__memory/unique_ptr.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=261>(), >> >> blob >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=73?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc>); >> >> >> WriteFileEpilogue >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.cc;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=176> >> (writer >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=78?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc> >> .get >> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/libc++/src/include/__memory/unique_ptr.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=261>(), >> >> blob >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=73?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc>); >> >> >> base::Fclose >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/base/platform/wrappers.h;drc=82dff63dbf9db05e9274e11d9128af7b9f51ceaa;l=22> >> (fp >> <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/snapshot/embedded/embedded-file-writer.h;bpv=1;bpt=1;l=88?q=MaybeWriteEmbeddedFile&ss=chromium%2Fchromium%2Fsrc&gsn=fp&gs=KYTHE%3A%2F%2Fkythe%3A%2F%2Fchromium.googlesource.com%2Fcodesearch%2Fchromium%2Fsrc%2F%2Fmain%3Flang%3Dc%252B%252B%3Fpath%3Dv8%2Fsrc%2Fsnapshot%2Fembedded%2Fembedded-file-writer.h%23HWLhnrKcc4AfVrEz1peB9fohj7UXgoUQYj4j7yjoAvc>); >> >> >> } >> ``` >> >> which related to this process? >> >> So how to debug it, is there are a document for it? Thanks! >> >> -- >> -- >> v8-dev mailing list >> v8-...@googlegroups.com >> http://groups.google.com/group/v8-dev >> --- >> You received this message because you are subscribed to the Google Groups >> "v8-dev" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to v8-dev+un...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/v8-dev/387e4b62-bccc-4973-a85f-df3091641d3cn%40googlegroups.com >> >> <https://groups.google.com/d/msgid/v8-dev/387e4b62-bccc-4973-a85f-df3091641d3cn%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > Jakob Gruber > > Software Engineer > > jgr...@google.com > > Google Germany GmbH > > Erika-Mann-Straße 33 > > 80636 München > > Geschäftsführer: Paul Manicle, Halimah DeLaine Prado > > Registergericht und -nummer: Hamburg, HRB 86891 > > Sitz der Gesellschaft: Hamburg > > Diese E-Mail ist vertraulich. 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