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Always add a null function at table index zero

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This allows function references (a table index internally) to be nullable
This commit is contained in:
dcodeIO
2018-09-17 01:48:35 +02:00
parent 9613d29d93
commit 16d1a833dd
170 changed files with 973 additions and 368 deletions
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13
src/compiler.ts
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@ -286,7 +286,7 @@ export class Compiler extends DiagnosticEmitter {
/** Map of already compiled static string segments. */
stringSegments: Map<string,MemorySegment> = new Map();
/** Function table being compiled. */
functionTable: string[] = [];
functionTable: string[] = [ "null" ];
/** Argument count helper global. */
argcVar: GlobalRef = 0;
/** Argument count helper setter. */
@ -394,10 +394,13 @@ export class Compiler extends DiagnosticEmitter {
var functionTable = this.functionTable;
var functionTableSize = functionTable.length;
var functionTableExported = false;
if (functionTableSize) {
module.setFunctionTable(functionTable);
module.addTableExport("0", "table");
functionTableExported = true;
module.setFunctionTable(functionTable);
if (functionTableSize) { // index 0 is NULL
module.addFunction("null", this.ensureFunctionType(null, Type.void), null, module.createBlock(null, []));
if (functionTableSize > 1) {
module.addTableExport("0", "table");
functionTableExported = true;
}
}
// import table if requested (default table is named '0' by Binaryen)