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marshal.c: use rb_gc_force_recycle for GC-safety

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Putting rb_gc_force_recycle at the end of the function has a nice
side-effect of keeping wrapper visible to GC until the moment of
recycle, preventing GC from prematurely killing live objects.
volatile is a common source of compiler bugs/differences, avoid it.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44994 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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normal 2014-02-16 03:45:15 +00:00
parent 401cf928c1
commit f97051512a
2 changed files with 14 additions and 8 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Sun Feb 16 11:55:14 2014 Eric Wong <e@80x24.org>
* marshal.c (marshal_dump): use rb_gc_force_recycle for GC-safety
(marshal_load): ditto
[ruby-core:60730] [Bug #7805]
Sun Feb 16 08:11:23 2014 Zachary Scott <e@zzak.io>
* README.EXT.ja: [DOC] Fix typo by @utenmiki [Fixes GH-534]

16
marshal.c
View file

@ -950,7 +950,7 @@ marshal_dump(int argc, VALUE *argv)
VALUE obj, port, a1, a2;
int limit = -1;
struct dump_arg *arg;
volatile VALUE wrapper;
VALUE wrapper; /* used to avoid memory leak in case of exception */
port = Qnil;
rb_scan_args(argc, argv, "12", &obj, &a1, &a2);
@ -964,7 +964,7 @@ marshal_dump(int argc, VALUE *argv)
else if (NIL_P(a1)) io_needed();
else port = a1;
}
RB_GC_GUARD(wrapper) = TypedData_Make_Struct(rb_cData, struct dump_arg, &dump_arg_data, arg);
wrapper = TypedData_Make_Struct(rb_cData, struct dump_arg, &dump_arg_data, arg);
arg->dest = 0;
arg->symbols = st_init_numtable();
arg->data = st_init_numtable();
@ -993,8 +993,8 @@ marshal_dump(int argc, VALUE *argv)
rb_io_write(arg->dest, arg->str);
rb_str_resize(arg->str, 0);
}
clear_dump_arg(arg);
RB_GC_GUARD(wrapper);
free_dump_arg(arg);
rb_gc_force_recycle(wrapper); /* also guards from premature GC */
return port;
}
@ -1957,7 +1957,7 @@ marshal_load(int argc, VALUE *argv)
VALUE port, proc;
int major, minor, infection = 0;
VALUE v;
volatile VALUE wrapper;
VALUE wrapper; /* used to avoid memory leak in case of exception */
struct load_arg *arg;
rb_scan_args(argc, argv, "11", &port, &proc);
@ -1973,7 +1973,7 @@ marshal_load(int argc, VALUE *argv)
else {
io_needed();
}
RB_GC_GUARD(wrapper) = TypedData_Make_Struct(rb_cData, struct load_arg, &load_arg_data, arg);
wrapper = TypedData_Make_Struct(rb_cData, struct load_arg, &load_arg_data, arg);
arg->infection = infection;
arg->src = port;
arg->offset = 0;
@ -2004,8 +2004,8 @@ marshal_load(int argc, VALUE *argv)
if (!NIL_P(proc)) arg->proc = proc;
v = r_object(arg);
clear_load_arg(arg);
RB_GC_GUARD(wrapper);
free_load_arg(arg);
rb_gc_force_recycle(wrapper); /* also guards from premature GC */
return v;
}