Add missing code to properly grow buffer

Related feedback:
- https://github.com/orgs/uBlockOrigin/teams/ublock-issues-volunteers/discussions/293

Related commit:
- 725e6931f5

Through all the changes, forgot to pay attention to scenarios
where the `filterData` needs to grow -- the buffer's defautl
size is set to accomodate default filter lists, and subscribing
to more lists would cause the static network filtering engine
to fail because the buffer was not resized when needed.

src/js/static-net-filtering.js

@@ -361,22 +361,27 @@ const FILTER_DATA_PAGE_SIZE = 65536;
 
 let filterData = new Int32Array(FILTER_DATA_PAGE_SIZE * 5);
 let filterDataWritePtr = 2;
+function filterDataGrow(len) {
+    if ( len <= filterData.length ) { return; }
+    const newLen = (len + FILTER_DATA_PAGE_SIZE-1) & ~(FILTER_DATA_PAGE_SIZE-1);
+    const newBuf = new Int32Array(newLen);
+    newBuf.set(filterData);
+    filterData = newBuf;
+}
 function filterDataAlloc(...args) {
-    const idata = filterDataWritePtr;
     const len = args.length;
-    filterDataWritePtr += len;
+    const idata = filterDataAllocLen(len);
-    if ( filterDataWritePtr > filterData.length ) {
+    for ( let i = 0; i < len; i++ ) {
-        const newLength = (filterDataWritePtr + FILTER_DATA_PAGE_SIZE-1) & ~(FILTER_DATA_PAGE_SIZE-1);
+        filterData[idata+i] = args[i];
-        filterData = new Int32Array(newLength);
-    }
-    for ( let j = 0; j < len; j++ ) {
-        filterData[idata+j] = args[j];
     }
     return idata;
 }
 function filterDataAllocLen(len) {
     const idata = filterDataWritePtr;
     filterDataWritePtr += len;
+    if ( filterDataWritePtr > filterData.length ) {
+        filterDataGrow(filterDataWritePtr);
+    }
     return idata;
 }
 const filterSequenceAdd = (a, b) => {
@@ -395,10 +400,8 @@ function filterDataToSelfie() {
 function filterDataFromSelfie(selfie) {
     if ( typeof selfie !== 'string' || selfie === '' ) { return false; }
     const data = JSON.parse(selfie);
-    const newLen = (data.length + FILTER_DATA_PAGE_SIZE-1) & ~(FILTER_DATA_PAGE_SIZE-1);
+    if ( Array.isArray(data) === false ) { return false; }
-    if ( newLen > filterData.length ) {
+    filterDataGrow(data.length);
-        filterData = new Int32Array(newLen);
-    }
     filterDataWritePtr = data.length;
     filterData.set(data);
     return true;
@@ -446,6 +449,7 @@ function filterRefsToSelfie() {
 function filterRefsFromSelfie(selfie) {
     if ( typeof selfie !== 'string' || selfie === '' ) { return false; }
     const refs = JSON.parse(selfie);
+    if ( Array.isArray(refs) === false ) { return false; }
     for ( let i = 0; i < refs.length; i++ ) {
         const v = refs[i];
         switch ( v.t ) {
@@ -1836,10 +1840,10 @@ const FilterCollection = class {
         filterData[idata+1] = i;
     }
 
-    static create() {
+    static create(fid = -1) {
         return filterDataAlloc(
-            this.fid,   // fid
+            fid !== -1 ? fid : FilterCollection.fid,
-            0           // i
+            0
         );
     }
 
@@ -2280,7 +2284,7 @@ const FilterBucket = class extends FilterCollection {
     static create() {
         const idata = filterDataAllocLen(4);
         filterData[idata+0] = FilterBucket.fid;             // fid
-        filterData[idata+1] = super.create();   // icollection
+        filterData[idata+1] = FilterCollection.create();    // icollection
         filterData[idata+2] = 0;                            // n
         filterData[idata+3] = 0;                            // $matchedUnit
         return idata;
@@ -3681,7 +3685,7 @@ FilterContainer.prototype.freeze = function() {
     if ( this.optimized !== true && this.optimizeTaskId === undefined ) {
         this.optimizeTaskId = queueTask(( ) => {
             this.optimizeTaskId = undefined;
-            this.optimize(10);
+            this.optimize();
         }, 2000);
     }
 };