I spent a couple of days trying to obfuscate all of std.
Ultimately I failed at making it fully work,
especially when it comes to the runtime package,
but I did fix a few problems along the way, as seen here.
First, fix the TODO to allow handleDirectives and transformGo to run on
runtime packages as well, if they are considered private. Note that this
is never true right now, but it matters once we remove runtimeRelated.
Second, modify parsedebugvars in a way that doesn't break typechecking.
We can remove AST nodes or even modify them in simple ways,
but if we add new AST nodes after typechecking,
those will lack type information.
We were replacing the entire body, running into that problem.
Instead, carefully cut the body to set some defaults,
but remove everything from the point GODEBUG is read.
Finally, add commented-out debug prints of transformed asm files.
For #193.
This mainly cleans up the few bits of code where we explicitly kept
support for Go 1.15.x. With v0.1.0 released, we can drop support now,
since the next v0.2.0 release will only support Go 1.16.x.
Also updates all modules, including test ones, to 'go 1.16'.
Note that the TOOLEXEC_IMPORTPATH refactor is not done here, despite all
the TODOs about doing so when we drop 1.15 support. This is because that
refactor needs to be done carefully and might have side effects, so it's
best to keep it to a separate commit.
Finally, update the deps.
Strip a few more traceback printing related functions in the runtime, new for Go 1.16. Also test that GODEBUG=inittrace=1 does not print anything when -tiny is passed.
There are three minor bugs breaking Go 1.16 with the current version of
garble, after the import path obfuscation refactor:
1) Stripping the runtime results in an unused import error. This PR
fixes that.
2) The asm.txt test seems to be broken; something to do with the export
data not being right for the exported assembly func.
3) The obfuscated build of std fails, since our runtimeRelated table was
generated for Go 1.15, not 1.16.
This PR fixes the first issue, adds conditional skip lines for 1.16 for
the other two issues, and enables 1.16 on CI.
Note that 1.16 support is not here just yet, because of the other two
issues. As such, no doc changes.
Updates #124.
Daniel Martí
Andrew LeFevre
Nick