Re: [PATCH] ggc, jit: forcibly clear GTY roots in jit

[David Malcolm <dmalcolm@redhat.com>]

On Tue, 2023-09-12 at 15:20 -0400, Antoni Boucher wrote:

FWIW I've pushed the "ggc, jit: forcibly clear GTY roots in jit" to
trunk after retesting it, as r14-4003-geaa8e8541349df.

> I added it to bugzilla here:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111396

I don't yet have a fix for this issue.

Dave


> 
> Since this only reproduces part of the issue, please let me test
> again
> with rustc_codegen_gcc after adding the missing fix.
> 
> I confirmed that the fix is in
> https://github.com/antoyo/gcc/commit/9d5b6b20efa20825926196759d50706a604c64a8
> so you might as well include all of this (except the linetable
> condition in toplev.cc).
> 
> On Tue, 2023-09-12 at 14:38 -0400, David Malcolm wrote:
> > On Tue, 2023-09-12 at 13:36 -0400, Antoni Boucher wrote:
> > > In the mean time, here's a (Rust) reproducer for the issue:
> > > 
> > > fn main() {
> > >     for _ in 0..5 {
> > >         let context = Context::default();
> > >         context.add_command_line_option("-flto");
> > >        
> > > context.set_optimization_level(OptimizationLevel::Aggressive);
> > >         context.add_driver_option("-nostdlib");
> > > 
> > >         let int_type = context.new_type::<i32>();
> > > 
> > >         let function = context.new_function(None,
> > > FunctionType::Exported, int_type, &[], "main", false);
> > >         let block = function.new_block("start");
> > >         let value = context.new_rvalue_from_int(int_type, 42);
> > >         block.end_with_return(None, value);
> > > 
> > >         context.compile_to_file(OutputKind::Executable,
> > > "my_exe");
> > >     }
> > > }
> > 
> > Can we get this in bugzilla please?  If you generate a .c version
> > of
> > the context (via gcc_jit_context_dump_reproducer_to_file) I can try
> > to
> > debug it.
> > 
> > Thanks
> > Dave
> > 
>