BTW, is it only worked for gdb, could it worked for windbg? 在2024年9月23日星期一 UTC+8 23:40:25<Jakob Kummerow> 写道：
> These are "code comments". You'll need to enable both the GN arg > v8_code_comments > = true and the command-line flag --code-comments; since CSA is used only > in mksnapshot you need to either: > - pass the latter flag to a manual invocation of mksnapshot, > - or enable it by default in flag-definitions.h and recompile normally, > - or, most conveniently, set the GN arg v8_enable_snapshot_code_comments > = true (which implies the other GN arg and the command-line flag). > You can then see these comments when disassembling builtins (with the jco > GDB macro). You may also want to use --nodebug-code to skip a large > number of generated checks that tend to be confusing when reading code. > > Code comments cannot be used for tracing control flow at runtime, they're > only helpful for making sense of the disassembly of generated code. Control > flow can be traced with the various Print(...) overloads in CSA, which > will print to stdout. > > > On Mon, Sep 23, 2024 at 5:23 PM 18楼梦想改造家 <[email protected]> wrote: > >> Hi, anyone. >> >> In v8 CSA subsystem, there are some code like this: >> >> ``` c++ >> void AccessorAssembler::GenericPropertyLoad( >> TNode<HeapObject> lookup_start_object, TNode<Map> >> lookup_start_object_map, >> TNode<Int32T> lookup_start_object_instance_type, const >> LoadICParameters* p, >> Label* slow, UseStubCache use_stub_cache) { >> DCHECK_EQ(lookup_start_object, p->lookup_start_object()); >> ExitPoint direct_exit(this); >> >> Comment("key is unique name"); // [+] @a >> Label if_found_on_lookup_start_object(this), >> if_property_dictionary(this), >> lookup_prototype_chain(this), special_receiver(this); >> } >> ``` >> >> At @a, we have a comment , I want to use it to trace the flow. But I >> don't know how to use it? So I have 2 question. >> >> 1. How to enable the Comment, is it worked in release version? >> 2. If we enable it, where the comment will Print to? >> >> Thanks! >> > -- -- v8-dev mailing list [email protected] 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-dev/f325a3be-4c66-4cd2-9708-cbab0ff983ddn%40googlegroups.com.
