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[release/7.0] [mono][interp] Fix an issue with deopt and interpreter tiering. #77059

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Merged
carlossanlop merged 2 commits into from
Nov 10, 2022
Merged

[release/7.0] [mono][interp] Fix an issue with deopt and interpreter tiering. #77059

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25da681
[mono][interp] Fix an issue with deopt and interpreter tiering.
vargaz Oct 7, 2022
c4a6d11
[mono][interp] Avoid tiering up methods while running clauses.
vargaz Oct 11, 2022
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[mono][interp] Fix an issue with deopt and interpreter tiering. 
If a method is tiered while being run from interp_run_clause_with_il_state (),
the clause_args argument to interp_exec_method () still contains the old IL
offsets confusing the EH code, i.e. this line:
```
if (clause_args && frame == clause_args->exec_frame && context->handler_ip >= clause_args->end_at_ip)
```

Clear out clause_args at the beginning to avoid this.

Hopefully fixes
#76134
#74302
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@vargaz
vargaz authored and github-actions committed Oct 14, 2022
commit 25da68183c248c3fcf0db3b047b65119ab2ac3bb
17 changes: 14 additions & 3 deletions src/mono/mono/mini/interp/interp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,7 @@ struct FrameClauseArgs {
const guint16 *end_at_ip;
/* Frame that is executing this clause */
InterpFrame *exec_frame;
gboolean run_until_end;
};

/*
Expand Down Expand Up @@ -3595,6 +3596,13 @@ interp_exec_method (InterpFrame *frame, ThreadContext *context, FrameClauseArgs

INIT_INTERP_STATE (frame, clause_args);

if (clause_args && clause_args->run_until_end)
/*
* Called from run_with_il_state to run the method until the end.
* Clear this out so it doesn't confuse the rest of the code.
*/
clause_args = NULL;

#ifdef ENABLE_EXPERIMENT_TIERED
mini_tiered_inc (frame->imethod->method, &frame->imethod->tiered_counter, 0);
#endif
Expand Down Expand Up @@ -7656,10 +7664,13 @@ interp_run_clause_with_il_state (gpointer il_state_ptr, int clause_index, MonoOb
clause_args.start_with_ip = (const guint16*)ei->data.filter;
else
clause_args.start_with_ip = (const guint16*)ei->handler_start;
if (clause_type == MONO_EXCEPTION_CLAUSE_NONE || clause_type == MONO_EXCEPTION_CLAUSE_FILTER)
clause_args.end_at_ip = (const guint16*)clause_args.start_with_ip + 0xffffff;
else
if (clause_type == MONO_EXCEPTION_CLAUSE_NONE || clause_type == MONO_EXCEPTION_CLAUSE_FILTER) {
/* Run until the end */
clause_args.end_at_ip = NULL;
clause_args.run_until_end = TRUE;
} else {
clause_args.end_at_ip = (const guint16*)ei->data.handler_end;
}
clause_args.exec_frame = &frame;

if (clause_type == MONO_EXCEPTION_CLAUSE_NONE || clause_type == MONO_EXCEPTION_CLAUSE_FILTER)
Expand Down