Volatile-ize all five places where we expect a PG_TRY block to restore

old memory context in plpython.  Before only one of them was marked
volatile, but per report from Zdenek Kotala, some compilers do the
wrong thing here.

diff --git a/src/pl/plpython/plpython.c b/src/pl/plpython/plpython.c
index 37b8638a08fed50a366649b58dccf2bef3693fb0..4bba81aceb79d72e24df2404d3bbb2d16560a7f4 100644 (file)
--- a/src/pl/plpython/plpython.c
+++ b/src/pl/plpython/plpython.c
@@ -1,7 +1,7 @@
 /**********************************************************************
  * plpython.c - python as a procedural language for PostgreSQL
  *
- *     $PostgreSQL: pgsql/src/pl/plpython/plpython.c,v 1.137 2010/02/14 18:42:19 rhaas Exp $
+ *     $PostgreSQL: pgsql/src/pl/plpython/plpython.c,v 1.138 2010/02/18 23:50:06 tgl Exp $
  *
  *********************************************************************
  */
@@ -2763,7 +2763,7 @@ PLy_spi_prepare(PyObject *self, PyObject *args)
        PyObject   *volatile optr = NULL;
        char       *query;
        void       *tmpplan;
-       MemoryContext oldcontext;
+       volatile MemoryContext oldcontext;
 
        /* Can't execute more if we have an unhandled error */
        if (PLy_error_in_progress)
@@ -2934,7 +2934,7 @@ PLy_spi_execute_plan(PyObject *ob, PyObject *list, long limit)
        int                     i,
                                rv;
        PLyPlanObject *plan;
-       MemoryContext oldcontext;
+       volatile MemoryContext oldcontext;
 
        if (list != NULL)
        {
@@ -3081,7 +3081,7 @@ static PyObject *
 PLy_spi_execute_query(char *query, long limit)
 {
        int                     rv;
-       MemoryContext oldcontext;
+       volatile MemoryContext oldcontext;
 
        oldcontext = CurrentMemoryContext;
        PG_TRY();
@@ -3116,7 +3116,7 @@ static PyObject *
 PLy_spi_execute_fetch_result(SPITupleTable *tuptable, int rows, int status)
 {
        PLyResultObject *result;
-       MemoryContext oldcontext;
+       volatile MemoryContext oldcontext;
 
        result = (PLyResultObject *) PLy_result_new();
        Py_DECREF(result->status);