Commit Graph

4 Commits

Author SHA1 Message Date
Pavel Labath a394231819 [lldb] Remove ConstString from SymbolVendor, Trace, TraceExporter, UnwindAssembly, MemoryHistory and InstrumentationRuntime plugin names 2021-10-29 12:08:57 +02:00
Pavel Labath a3939e159f [lldb] Return StringRef from PluginInterface::GetPluginName
There is no reason why this function should be returning a ConstString.

While modifying these files, I also fixed several instances where
GetPluginName and GetPluginNameStatic were returning different strings.

I am not changing the return type of GetPluginNameStatic in this patch, as that
would necessitate additional changes, and this patch is big enough as it is.

Differential Revision: https://reviews.llvm.org/D111877
2021-10-18 10:14:42 +02:00
Pavel Labath b03126768a [lldb] Remove PluginInterface::GetPluginVersion
In all these years, we haven't found a use for this function (it has
zero callers). Lets just remove the boilerplate.

Differential Revision: https://reviews.llvm.org/D109600
2021-09-13 10:29:00 +02:00
Walter Erquinigo c1b4632528 [trace] Add the definition of a TraceExporter plugin
Copying from the inline documentation:

```
Trace exporter plug-ins operate on traces, converting the trace data provided by an \a lldb_private::TraceCursor into a different format that can be digested by other tools, e.g. Chrome Trace Event Profiler.
Trace exporters are supposed to operate on an architecture-agnostic fashion, as a TraceCursor, which feeds the data, hides the actual trace technology being used.
```

I want to use this to make the code in https://reviews.llvm.org/D105741 a plug-in. I also imagine that there will be more and more exporters being implemented, as an exporter creates something useful out of trace data. And tbh I don't want to keep adding more stuff to the lldb/Target folder.

This is the minimal definition for a TraceExporter plugin. I plan to use this with the following commands:

- thread trace export <plug-in name> [plug-in specific args]
  - This command would support autocompletion of plug-in names
- thread trace export list
  - This command would list the available trace exporter plug-ins

I don't plan to create yet a "process trace export" because it's easier to start analyzing the trace of a given thread than of the entire process. When we need a process-level command, we can implement it.

I also don't plan to force each "export" command implementation to support multiple threads (for example, "thread trace start 1 2 3" or "thread trace start all" operate on many threads simultaneously). The reason is that the format used by the exporter might or might not support multiple threads, so I'm leaving this decision to each trace exporter plug-in.

Differential Revision: https://reviews.llvm.org/D106501
2021-07-26 18:01:50 -07:00