mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
33ab98f9e6
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43253 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/**********************************************************************
|
|
|
|
gc_hook.c - GC hook mechanism/ObjectSpace extender for MRI.
|
|
|
|
$Author$
|
|
created at: Tue May 28 01:34:25 2013
|
|
|
|
NOTE: This extension library is not expected to exist except C Ruby.
|
|
NOTE: This feature is an example usage of internal event tracing APIs.
|
|
|
|
All the files in this distribution are covered under the Ruby's
|
|
license (see the file COPYING).
|
|
|
|
**********************************************************************/
|
|
|
|
#include "ruby/ruby.h"
|
|
#include "ruby/debug.h"
|
|
|
|
static int invoking; /* TODO: should not be global variable */
|
|
|
|
static VALUE
|
|
invoke_proc_ensure(void *dmy)
|
|
{
|
|
invoking = 0;
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
invoke_proc_begin(VALUE proc)
|
|
{
|
|
return rb_proc_call(proc, rb_ary_new());
|
|
}
|
|
|
|
static void
|
|
invoke_proc(void *data)
|
|
{
|
|
VALUE proc = (VALUE)data;
|
|
invoking += 1;
|
|
rb_ensure(invoke_proc_begin, proc, invoke_proc_ensure, 0);
|
|
}
|
|
|
|
static void
|
|
gc_start_end_i(VALUE tpval, void *data)
|
|
{
|
|
if (0) {
|
|
rb_trace_arg_t *tparg = rb_tracearg_from_tracepoint(tpval);
|
|
fprintf(stderr, "trace: %s\n", rb_tracearg_event_flag(tparg) == RUBY_INTERNAL_EVENT_GC_START ? "gc_start" : "gc_end");
|
|
}
|
|
|
|
if (invoking == 0) {
|
|
rb_postponed_job_register(0, invoke_proc, data);
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
set_gc_hook(VALUE rb_mObjSpace, VALUE proc, rb_event_flag_t event, const char *tp_str, const char *proc_str)
|
|
{
|
|
VALUE tpval;
|
|
ID tp_key = rb_intern(tp_str);
|
|
ID proc_key = rb_intern(proc_str);
|
|
|
|
/* disable previous keys */
|
|
if (rb_ivar_defined(rb_mObjSpace, tp_key) != 0 &&
|
|
RTEST(tpval = rb_ivar_get(rb_mObjSpace, tp_key))) {
|
|
rb_tracepoint_disable(tpval);
|
|
rb_ivar_set(rb_mObjSpace, tp_key, Qnil);
|
|
rb_ivar_set(rb_mObjSpace, proc_key, Qnil);
|
|
}
|
|
|
|
if (RTEST(proc)) {
|
|
if (!rb_obj_is_proc(proc)) {
|
|
rb_raise(rb_eTypeError, "trace_func needs to be Proc");
|
|
}
|
|
|
|
tpval = rb_tracepoint_new(0, event, gc_start_end_i, (void *)proc);
|
|
rb_ivar_set(rb_mObjSpace, tp_key, tpval);
|
|
rb_ivar_set(rb_mObjSpace, proc_key, proc); /* GC guard */
|
|
rb_tracepoint_enable(tpval);
|
|
}
|
|
|
|
return proc;
|
|
}
|
|
|
|
static VALUE
|
|
set_after_gc_start(VALUE rb_mObjSpace, VALUE proc)
|
|
{
|
|
return set_gc_hook(rb_mObjSpace, proc, RUBY_INTERNAL_EVENT_GC_START,
|
|
"__set_after_gc_start_tpval__", "__set_after_gc_start_proc__");
|
|
}
|
|
|
|
static VALUE
|
|
set_after_gc_end(VALUE rb_mObjSpace, VALUE proc)
|
|
{
|
|
return set_gc_hook(rb_mObjSpace, proc, RUBY_INTERNAL_EVENT_GC_END,
|
|
"__set_after_gc_end_tpval__", "__set_after_gc_end_proc__");
|
|
}
|
|
|
|
void
|
|
Init_gc_hook(VALUE rb_mObjSpace)
|
|
{
|
|
rb_define_module_function(rb_mObjSpace, "after_gc_start_hook=", set_after_gc_start, 1);
|
|
rb_define_module_function(rb_mObjSpace, "after_gc_end_hook=", set_after_gc_end, 1);
|
|
}
|