I'm only familiar with tools/gdbinit, which is GDB-specific.
There is tools/v8windbg/ though, which is presumably helpful for windbg.
On Mon, Sep 23, 2024 at 5:59 PM 18楼梦想改造家 <18.floor.h...@gmail.com> wrote:
> 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 <18.flo...@gmail.com> 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!
>>
>>
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