Commit1226d93

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Fix volatile vs. pointer confusion

Variables used after a longjmp() need to be declared volatile. Incase of a pointer, it's the pointer itself that needs to be declaredvolatile, not the pointed-to value. So we need PyObject *volatile items;instead of volatile PyObject *items; /* wrong */Discussion:https://www.postgresql.org/message-id/flat/f747368d-9e1a-c46a-ac76-3c27da32e8e4%402ndquadrant.com

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-11

lines changed

contrib
- hstore_plpython
  - hstore_plpython.c
- jsonb_plpython
  - jsonb_plpython.c

-11

lines changed

Lines changed: 4 additions & 5 deletions

Original file line number	Diff line number	Diff line change
`@@ -128,7 +128,7 @@ Datum`
`128`	`128`	`plpython_to_hstore(PG_FUNCTION_ARGS)`
`129`	`129`	`{`
`130`	`130`	`PyObject*dict;`
`131`		`-volatilePyObject*items_v=NULL;`
	`131`	`+PyObject*volatileitems=NULL;`
`132`	`132`	`int32pcount;`
`133`	`133`	`HStore*out;`
`134`	`134`
`@@ -139,14 +139,13 @@ plpython_to_hstore(PG_FUNCTION_ARGS)`
`139`	`139`	`errmsg("not a Python mapping")));`
`140`	`140`
`141`	`141`	`pcount=PyMapping_Size(dict);`
`142`		`-items_v=PyMapping_Items(dict);`
	`142`	`+items=PyMapping_Items(dict);`
`143`	`143`
`144`	`144`	`PG_TRY();`
`145`	`145`	`{`
`146`	`146`	`int32buflen;`
`147`	`147`	`int32i;`
`148`	`148`	`Pairs*pairs;`
`149`		`-PyObjectitems= (PyObject)items_v;`
`150`	`149`
`151`	`150`	`pairs=palloc(pcountsizeof(pairs));`
`152`	`151`
`@@ -177,14 +176,14 @@ plpython_to_hstore(PG_FUNCTION_ARGS)`
`177`	`176`	`pairs[i].isnull= false;`
`178`	`177`	`}`
`179`	`178`	`}`
`180`		`-Py_DECREF(items_v);`
	`179`	`+Py_DECREF(items);`
`181`	`180`
`182`	`181`	`pcount=hstoreUniquePairs(pairs,pcount,&buflen);`
`183`	`182`	`out=hstorePairs(pairs,pcount,buflen);`
`184`	`183`	`}`
`185`	`184`	`PG_CATCH();`
`186`	`185`	`{`
`187`		`-Py_DECREF(items_v);`
	`186`	`+Py_DECREF(items);`
`188`	`187`	`PG_RE_THROW();`
`189`	`188`	`}`
`190`	`189`	`PG_END_TRY();`

Lines changed: 3 additions & 6 deletions

Original file line number	Diff line number	Diff line change
`@@ -237,17 +237,14 @@ PLyMapping_ToJsonbValue(PyObject obj, JsonbParseState *jsonb_state)`
`237`	`237`	`JsonbValue*out=NULL;`
`238`	`238`
`239`	`239`	`/* We need it volatile, since we use it after longjmp */`
`240`		`-volatilePyObject*items_v=NULL;`
	`240`	`+PyObject*volatileitems=NULL;`
`241`	`241`
`242`	`242`	`pcount=PyMapping_Size(obj);`
`243`		`-items_v=PyMapping_Items(obj);`
	`243`	`+items=PyMapping_Items(obj);`
`244`	`244`
`245`	`245`	`PG_TRY();`
`246`	`246`	`{`
`247`	`247`	`Py_ssize_ti;`
`248`		`-PyObject*items;`
`249`		`-`
`250`		`-items= (PyObject*)items_v;`
`251`	`248`
`252`	`249`	`pushJsonbValue(jsonb_state,WJB_BEGIN_OBJECT,NULL);`
`253`	`250`
`@@ -279,7 +276,7 @@ PLyMapping_ToJsonbValue(PyObject obj, JsonbParseState *jsonb_state)`
`279`	`276`	`}`
`280`	`277`	`PG_CATCH();`
`281`	`278`	`{`
`282`		`-Py_DECREF(items_v);`
	`279`	`+Py_DECREF(items);`
`283`	`280`	`PG_RE_THROW();`
`284`	`281`	`}`
`285`	`282`	`PG_END_TRY();`

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