Summary:
Changes jitlog to use a memfd, an anonymous in memory file descriptor, rather
than a file on disk. Also clean up this fd at the end of an OID run rather than
leaving it in the hope it's valid next time.
A previous attempt to land this used a `char*` from the OID process space in
the remote target syscall. Somehow this works with our integration test target,
but not globally. Changed to use the previous behaviour of putting the syscall
arg in the empty text segment. In doing this I noticed that the text segment
wouldn't be initialised at this point on a fresh process, so we were copying
into effectively an uninitialised address. Move the jit log fd setup to after
the segment setup accordingly.
Test plan:
- CI
- Tested on an integration test target as before. Works.
- Created a new target that definitely doesn't have this string in (simple for
loop). Failed before, works now.
Example:
```sh
$ OID_TEST_ARGS='-fjit-logging' stest OidIntegration.simple_struct
...
I1121 02:57:36.136890 500897 OIDebugger.cpp:269] Outputting JIT logs:
I1121 02:57:36.136896 500897 OIDebugger.cpp:272] JITLOG: SimpleStruct
@00007ffc639be180
I1121 02:57:36.136899 500897 OIDebugger.cpp:272] JITLOG: a @00007ffc639be180
I1121 02:57:36.136901 500897 OIDebugger.cpp:272] JITLOG: obj @00007ffc639be180
I1121 02:57:36.136904 500897 OIDebugger.cpp:272] JITLOG: b @00007ffc639be184
I1121 02:57:36.136905 500897 OIDebugger.cpp:272] JITLOG: obj @00007ffc639be184
I1121 02:57:36.136907 500897 OIDebugger.cpp:272] JITLOG: c @00007ffc639be188
I1121 02:57:36.136909 500897 OIDebugger.cpp:272] JITLOG: obj @00007ffc639be188
I1121 02:57:36.136911 500897 OIDebugger.cpp:278] Finished outputting JIT logs.
...
```
Summary:
Spin around our open/closed source checks. Previously we defined `OSS_ENABLE` in open source builds. This change defines `OI_META_INTERNAL` instead. This is nicer, as external users don't have to do anything special to get a working build.
Use this new macro to define a boolean constant in a new header `Portability.h`. This is inspired by Folly, and makes the internal build easier - definitions in Buck2 have to propagate up from a dependency instead of down from one. Annoyingly we can't use `if constexpr` for a lot of the previous `#ifdef` blocks as we conditionally include the headers. Longer term we could fix this by exposing a header interface but no source, allowing these to build but not be compiled in. For now I did something weird: I defined a function style macro in `Portability.h` based on the compile time macro. This forces you to have included `Portability.h` before using it to ensure the definition is everywhere. Open to feedback as I haven't seen anyone else do this.
Reviewed By: tyroguru
Differential Revision: D50000454
Summary:
More moving code out of the `cea` subdirectory. This is moving the GOBS cache code which is contained in the 'internal' subdirectory. I'm hoping I get some auto generated diffs to push to GitHub for the third party source changes...
Reviewed By: JakeHillion
Differential Revision: D50366591
Summary:
Previously OID/OIL required exactly one configuration file. This change makes it so you can supply 0 or more configuration files. 0 is useful if you have pre-generated the cache or use some sort of remote generation system. 1 is useful for the common case, where you have a configuration file that describes your entire source and use just that. More are useful if you have supplemental bits of config you wish to apply/override - see the changes to the integration test framework where we do exactly this.
Test Plan:
This isn't super well tested. It works for the test cases which add features via the config or enable `codegen.ignore`.
- CI
Reviewed By: ajor
Differential Revision: D49758032
Pulled By: JakeHillion
As we now store ContainerInfo objects in OICodeGen::Config, we can not
copy it any more. Change all places that took copies to take const
references instead.
The copy in OICodeGen modified membersToStub, the contents of which form
part of OICache's hash. However, as OICache also previously had its own
copy, it would not have been OICodeGen's modifications.
Previously we had an `R"(` string in `OITraceCode.cpp` which allowed us
to include the file as a string. Instead, keep `OITraceCode.cpp` a fully
formed C++ file and utilise the build system to turn it into a string.
This will be used for more header files that are needed both as valid
headers and as strings for JIT compilation in the Typed TreeBuilder
work.
