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Extend [0e69b2c379e618] to support uninstalling stale JS-to-WASM function pointers added on behalf of UDFs.

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FossilOrigin-Name: 7a46e629dcbf97ae037c5abb39306af7ad55f1910c1e962373e09d88d8bd5a33
This commit is contained in:
stephan
2022-12-26 13:45:10 +00:00
parent 7197f0a8f2
commit 171aa209fa
4 changed files with 73 additions and 19 deletions
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71
ext/wasm/api/sqlite3-api-glue.js
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@ -760,6 +760,26 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
m.collation.add(__argStr(name).toLowerCase());
};
__dbCleanupMap._addUDF = function(pDb, name, arity, map){
/* Map UDF name to a Set of arity values */
name = __argStr(name).toLowerCase();
let u = map.get(name);
if(!u) map.set(name, (u = new Set));
u.add((arity<0) ? -1 : arity);
};
__dbCleanupMap.addFunction = function(pDb, name, arity){
const m = __dbCleanupMap(pDb, 1);
if(!m.udf) m.udf = new Map;
this._addUDF(pDb, name, arity, m.udf);
};
__dbCleanupMap.addWindowFunc = function(pDb, name, arity){
const m = __dbCleanupMap(pDb, 1);
if(!m.wudf) m.wudf = new Map;
this._addUDF(pDb, name, arity, m.wudf);
};
/**
Intended to be called _only_ from sqlite3_close_v2(),
passed its non-0 db argument.
@ -783,7 +803,7 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
*/
__dbCleanupMap.cleanup = function(pDb){
pDb = __argPDb(pDb);
//wasm.xWrap.FuncPtrAdapter.debugFuncInstall = true;
wasm.xWrap.FuncPtrAdapter.debugFuncInstall = true;
/**
Installing NULL functions in the C API will remove those
bindings. The FuncPtrAdapter which sits between us and the C
@ -809,10 +829,28 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
}
delete m.collation;
}
if(m.udf){
//TODO: map and clean up UDFs.
let i;
for(i = 0; i < 2; ++i){ /* Clean up UDFs... */
const fmap = i ? m.wudf : m.udf;
if(!fmap) continue;
const func = i
? capi.sqlite3_create_window_function
: capi.sqlite3_create_function_v2;
for(const e of fmap){
const name = e[0], arities = e[1];
const fargs = [pDb, name, 0/*arity*/, capi.SQLITE_UTF8, 0, 0, 0, 0, 0];
if(i) fargs.push(0);
for(const arity of arities){
try{ fargs[2] = arity; func.apply(null, fargs); }
catch(e){/*ignored*/}
}
arities.clear();
}
fmap.clear();
}
};
delete m.udf;
delete m.wudf;
}/*__dbCleanupMap.cleanup()*/;
{/* Binding of sqlite3_close_v2() */
const __sqlite3CloseV2 = wasm.xWrap("sqlite3_close_v2", "int", "sqlite3*");
@ -1015,8 +1053,15 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
return __errEncoding(pDb);
}
try{
return __sqlite3CreateFunction(pDb, funcName, nArg, eTextRep,
pApp, xFunc, xStep, xFinal, xDestroy);
const rc = __sqlite3CreateFunction(pDb, funcName, nArg, eTextRep,
pApp, xFunc, xStep, xFinal, xDestroy);
if(0===rc && (xFunc instanceof Function
|| xStep instanceof Function
|| xFinal instanceof Function
|| xDestroy instanceof Function)){
__dbCleanupMap.addFunction(pDb, funcName, nArg);
}
return rc;
}catch(e){
console.error("sqlite3_create_function_v2() setup threw:",e);
return util.sqlite3_wasm_db_error(pDb, e, "Creation of UDF threw: "+e);
@ -1051,9 +1096,17 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
return __errEncoding(pDb);
}
try{
return __sqlite3CreateWindowFunction(pDb, funcName, nArg, eTextRep,
pApp, xStep, xFinal, xValue,
xInverse, xDestroy);
const rc = __sqlite3CreateWindowFunction(pDb, funcName, nArg, eTextRep,
pApp, xStep, xFinal, xValue,
xInverse, xDestroy);
if(0===rc && (xStep instanceof Function
|| xFinal instanceof Function
|| xValue instanceof Function
|| xInverse instanceof Function
|| xDestroy instanceof Function)){
__dbCleanupMap.addWindowFunc(pDb, funcName, nArg);
}
return rc;
}catch(e){
console.error("sqlite3_create_window_function() setup threw:",e);
return util.sqlite3_wasm_db_error(pDb, e, "Creation of UDF threw: "+e);