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Since plpgsql keeps its compiled function parsetrees until backend exit,

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it needs to ensure that data structures attached to fmgr info records in
the trees will stick around that long, too.  Current code was crashing
on cases like datatypes with old-style I/O functions.
This commit is contained in:
Tom Lane 2001-04-06 02:06:48 +00:00
parent f10596c3ec
commit a3ed622b63
1 changed files with 29 additions and 7 deletions
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36
src/pl/plpgsql/src/pl_comp.c
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@ -3,7 +3,7 @@
* procedural language
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/pl_comp.c,v 1.28 2001/03/22 06:16:21 momjian Exp $
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/pl_comp.c,v 1.29 2001/04/06 02:06:48 tgl Exp $
*
* This software is copyrighted by Jan Wieck - Hamburg.
*
@ -85,6 +85,28 @@ int plpgsql_DumpExecTree = 0;
PLpgSQL_function *plpgsql_curr_compile;
/*
* This routine is a crock, and so is everyplace that calls it. The problem
* is that the compiled form of a plpgsql function is allocated permanently
* (mostly via malloc()) and never released until backend exit. Subsidiary
* data structures such as fmgr info records therefore must live forever
* as well. A better implementation would store all this stuff in a per-
* function memory context that could be reclaimed at need. In the meantime,
* fmgr_info must be called in TopMemoryContext so that whatever it might
* allocate, and whatever the eventual function might allocate using fn_mcxt,
* will live forever too.
*/
static void
perm_fmgr_info(Oid functionId, FmgrInfo *finfo)
{
MemoryContext oldcontext;
oldcontext = MemoryContextSwitchTo(TopMemoryContext);
fmgr_info(functionId, finfo);
MemoryContextSwitchTo(oldcontext);
}
/* ----------
* plpgsql_compile Given a pg_proc's oid, make
* an execution tree for it.
@ -184,7 +206,7 @@ plpgsql_compile(Oid fn_oid, int functype)
function->fn_retbyval = typeStruct->typbyval;
function->fn_rettyplen = typeStruct->typlen;
function->fn_rettypelem = typeStruct->typelem;
fmgr_info(typeStruct->typinput, &(function->fn_retinput));
perm_fmgr_info(typeStruct->typinput, &(function->fn_retinput));
}
ReleaseSysCache(typeTup);
@ -257,7 +279,7 @@ plpgsql_compile(Oid fn_oid, int functype)
var->datatype->typname = DatumGetCString(DirectFunctionCall1(nameout,
NameGetDatum(&(typeStruct->typname))));
var->datatype->typoid = procStruct->proargtypes[i];
fmgr_info(typeStruct->typinput, &(var->datatype->typinput));
perm_fmgr_info(typeStruct->typinput, &(var->datatype->typinput));
var->datatype->typelem = typeStruct->typelem;
var->datatype->typbyval = typeStruct->typbyval;
var->datatype->atttypmod = -1;
@ -607,7 +629,7 @@ plpgsql_parse_word(char *word)
typ->typname = DatumGetCString(DirectFunctionCall1(nameout,
NameGetDatum(&(typeStruct->typname))));
typ->typoid = typeTup->t_data->t_oid;
fmgr_info(typeStruct->typinput, &(typ->typinput));
perm_fmgr_info(typeStruct->typinput, &(typ->typinput));
typ->typelem = typeStruct->typelem;
typ->typbyval = typeStruct->typbyval;
typ->atttypmod = -1;
@ -923,7 +945,7 @@ plpgsql_parse_wordtype(char *word)
typ->typname = DatumGetCString(DirectFunctionCall1(nameout,
NameGetDatum(&(typeStruct->typname))));
typ->typoid = typeTup->t_data->t_oid;
fmgr_info(typeStruct->typinput, &(typ->typinput));
perm_fmgr_info(typeStruct->typinput, &(typ->typinput));
typ->typelem = typeStruct->typelem;
typ->typbyval = typeStruct->typbyval;
typ->atttypmod = -1;
@ -1066,7 +1088,7 @@ plpgsql_parse_dblwordtype(char *string)
typ->typname = DatumGetCString(DirectFunctionCall1(nameout,
NameGetDatum(&(typeStruct->typname))));
typ->typoid = typetup->t_data->t_oid;
fmgr_info(typeStruct->typinput, &(typ->typinput));
perm_fmgr_info(typeStruct->typinput, &(typ->typinput));
typ->typelem = typeStruct->typelem;
typ->typbyval = typeStruct->typbyval;
typ->atttypmod = attrStruct->atttypmod;
@ -1200,7 +1222,7 @@ plpgsql_parse_wordrowtype(char *string)
var->datatype = malloc(sizeof(PLpgSQL_type));
var->datatype->typname = strdup(NameStr(typeStruct->typname));
var->datatype->typoid = typetup->t_data->t_oid;
fmgr_info(typeStruct->typinput, &(var->datatype->typinput));
perm_fmgr_info(typeStruct->typinput, &(var->datatype->typinput));
var->datatype->typelem = typeStruct->typelem;
var->datatype->typbyval = typeStruct->typbyval;
var->datatype->atttypmod = attrStruct->atttypmod;