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Clear all trace events during teardown

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Since 0c2d81dada, not all trace events are cleared during VM teardown.
This causes a crash when there is a tracepoint for
`RUBY_INTERNAL_EVENT_GC_EXIT` active during teardown.

The commit looks like a refactoring commit so I think this change was
unintentional.

[Bug #16682]

(cherry picked from commit b385f7670f)
This commit is contained in:
Alan Wu 2020-03-11 10:37:14 -04:00 • committed by NARUSE, Yui
parent 0057fe4063
commit b5fa156b79
4 changed files with 20 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

3
eval.c
View file

@ -26,6 +26,7 @@
NORETURN(void rb_raise_jump(VALUE, VALUE));
void rb_ec_clear_current_thread_trace_func(const rb_execution_context_t *ec);
void rb_ec_clear_all_trace_func(const rb_execution_context_t *ec);
static int rb_ec_cleanup(rb_execution_context_t *ec, volatile int ex);
static int rb_ec_exec_node(rb_execution_context_t *ec, void *n);
@ -140,7 +141,7 @@ rb_ec_teardown(rb_execution_context_t *ec)
}
EC_POP_TAG();
rb_ec_exec_end_proc(ec);
rb_ec_clear_current_thread_trace_func(ec);
rb_ec_clear_all_trace_func(ec);
}
static void

8
ext/-test-/tracepoint/gc_hook.c
View file

@ -73,8 +73,16 @@ set_after_gc_start(VALUE module, VALUE proc)
"__set_after_gc_start_tpval__", "__set_after_gc_start_proc__");
}
static VALUE
start_after_gc_exit(VALUE module, VALUE proc)
{
return set_gc_hook(module, proc, RUBY_INTERNAL_EVENT_GC_EXIT,
"__set_after_gc_exit_tpval__", "__set_after_gc_exit_proc__");
}
void
Init_gc_hook(VALUE module)
{
rb_define_module_function(module, "after_gc_start_hook=", set_after_gc_start, 1);
rb_define_module_function(module, "after_gc_exit_hook=", start_after_gc_exit, 1);
}

4
test/-ext-/tracepoint/test_tracepoint.rb
View file

@ -79,4 +79,8 @@ class TestTracepointObj < Test::Unit::TestCase
end
end
def test_teardown_with_active_GC_end_hook
assert_separately([], 'require("-test-/tracepoint"); Bug.after_gc_exit_hook = proc {}')
end
end

6
vm_trace.c
View file

@ -276,6 +276,12 @@ rb_ec_clear_current_thread_trace_func(const rb_execution_context_t *ec)
rb_threadptr_remove_event_hook(ec, rb_ec_thread_ptr(ec), 0, Qundef);
}
void
rb_ec_clear_all_trace_func(const rb_execution_context_t *ec)
{
rb_threadptr_remove_event_hook(ec, MATCH_ANY_FILTER_TH, 0, Qundef);
}
/* invoke hooks */
static void