Examples with Instruction org.wso2.ballerinalang.programfile.Instruction used on opensource projects

Example 1 with Instruction

use of org.wso2.ballerinalang.programfile.Instruction in project ballerina by ballerina-lang.

the class PackageInfoWriter method writeInstructions.

private static byte[] writeInstructions(Instruction[] instructions) throws IOException {
    ByteArrayOutputStream byteAOS = new ByteArrayOutputStream();
    DataOutputStream dataOutStream = new DataOutputStream(byteAOS);
    for (Instruction instruction : instructions) {
        dataOutStream.write(instruction.opcode);
        for (Operand operand : instruction.ops) {
            dataOutStream.writeInt(operand.value);
        }
    }
    return byteAOS.toByteArray();
}

Example 2 with Instruction

use of org.wso2.ballerinalang.programfile.Instruction in project ballerina by ballerina-lang.

the class CodeGenerator method processTimeoutBlock.

/* generate code for timeout block */
private void processTimeoutBlock(BLangForkJoin forkJoin, SymbolEnv forkJoinEnv, RegIndex timeoutVarRegIndex, Operand timeoutBlockAddr) {
    /* emit a GOTO instruction to jump out of the timeout block */
    Operand gotoAddr = getOperand(-1);
    this.emit(InstructionCodes.GOTO, gotoAddr);
    timeoutBlockAddr.value = nextIP();
    if (forkJoin.timeoutVariable != null) {
        visitForkJoinParameterDefs(forkJoin.timeoutVariable, forkJoinEnv);
        timeoutVarRegIndex.value = forkJoin.timeoutVariable.symbol.varIndex.value;
    }
    if (forkJoin.timeoutBody != null) {
        this.genNode(forkJoin.timeoutBody, forkJoinEnv);
    }
    gotoAddr.value = nextIP();
}

Example 3 with Instruction

use of org.wso2.ballerinalang.programfile.Instruction in project ballerina by ballerina-lang.

the class CodeGenerator method visit.

public void visit(BLangLock lockNode) {
    if (lockNode.lockVariables.isEmpty()) {
        this.genNode(lockNode.body, this.env);
        return;
    }
    Operand gotoLockEndAddr = getOperand(-1);
    Instruction instructGotoLockEnd = InstructionFactory.get(InstructionCodes.GOTO, gotoLockEndAddr);
    Operand[] operands = getOperands(lockNode);
    ErrorTableAttributeInfo errorTable = createErrorTableIfAbsent(currentPkgInfo);
    int fromIP = nextIP();
    emit((InstructionCodes.LOCK), operands);
    this.genNode(lockNode.body, this.env);
    int toIP = nextIP() - 1;
    emit((InstructionCodes.UNLOCK), operands);
    emit(instructGotoLockEnd);
    ErrorTableEntry errorTableEntry = new ErrorTableEntry(fromIP, toIP, nextIP(), 0, -1);
    errorTable.addErrorTableEntry(errorTableEntry);
    emit((InstructionCodes.UNLOCK), operands);
    emit(InstructionFactory.get(InstructionCodes.THROW, getOperand(-1)));
    gotoLockEndAddr.value = nextIP();
}

Example 4 with Instruction

use of org.wso2.ballerinalang.programfile.Instruction in project ballerina by ballerina-lang.

the class CodeGenerator method visit.

public void visit(BLangTransaction transactionNode) {
    ++transactionIndex;
    Operand transactionIndexOperand = getOperand(transactionIndex);
    Operand retryCountRegIndex = new RegIndex(-1, TypeTags.INT);
    if (transactionNode.retryCount != null) {
        this.genNode(transactionNode.retryCount, this.env);
        retryCountRegIndex = transactionNode.retryCount.regIndex;
    }
    Operand committedFuncRegIndex = new RegIndex(-1, TypeTags.INVOKABLE);
    if (transactionNode.onCommitFunction != null) {
        committedFuncRegIndex.value = getFuncRefCPIndex((BInvokableSymbol) ((BLangFunctionVarRef) transactionNode.onCommitFunction).symbol);
    }
    Operand abortedFuncRegIndex = new RegIndex(-1, TypeTags.INVOKABLE);
    if (transactionNode.onAbortFunction != null) {
        abortedFuncRegIndex.value = getFuncRefCPIndex((BInvokableSymbol) ((BLangFunctionVarRef) transactionNode.onAbortFunction).symbol);
    }
    ErrorTableAttributeInfo errorTable = createErrorTableIfAbsent(currentPkgInfo);
    Operand transStmtEndAddr = getOperand(-1);
    Operand transStmtAbortEndAddr = getOperand(-1);
    Operand transStmtFailEndAddr = getOperand(-1);
    Instruction gotoAbortTransBlockEnd = InstructionFactory.get(InstructionCodes.GOTO, transStmtAbortEndAddr);
    Instruction gotoFailTransBlockEnd = InstructionFactory.get(InstructionCodes.GOTO, transStmtFailEndAddr);
    abortInstructions.push(gotoAbortTransBlockEnd);
    failInstructions.push(gotoFailTransBlockEnd);
    // start transaction
    this.emit(InstructionCodes.TR_BEGIN, transactionIndexOperand, retryCountRegIndex, committedFuncRegIndex, abortedFuncRegIndex);
    Operand transBlockStartAddr = getOperand(nextIP());
    // retry transaction;
    Operand retryEndWithThrowAddr = getOperand(-1);
    Operand retryEndWithNoThrowAddr = getOperand(-1);
    this.emit(InstructionCodes.TR_RETRY, transactionIndexOperand, retryEndWithThrowAddr, retryEndWithNoThrowAddr);
    // process transaction statements
    this.genNode(transactionNode.transactionBody, this.env);
    // end the transaction
    int transBlockEndAddr = nextIP();
    this.emit(InstructionCodes.TR_END, transactionIndexOperand, getOperand(TransactionStatus.SUCCESS.value()));
    abortInstructions.pop();
    failInstructions.pop();
    emit(InstructionCodes.GOTO, transStmtEndAddr);
    // CodeGen for error handling.
    int errorTargetIP = nextIP();
    transStmtFailEndAddr.value = errorTargetIP;
    emit(InstructionCodes.TR_END, transactionIndexOperand, getOperand(TransactionStatus.FAILED.value()));
    if (transactionNode.onRetryBody != null) {
        this.genNode(transactionNode.onRetryBody, this.env);
    }
    emit(InstructionCodes.GOTO, transBlockStartAddr);
    retryEndWithThrowAddr.value = nextIP();
    emit(InstructionCodes.TR_END, transactionIndexOperand, getOperand(TransactionStatus.END.value()));
    emit(InstructionCodes.THROW, getOperand(-1));
    ErrorTableEntry errorTableEntry = new ErrorTableEntry(transBlockStartAddr.value, transBlockEndAddr, errorTargetIP, 0, -1);
    errorTable.addErrorTableEntry(errorTableEntry);
    transStmtAbortEndAddr.value = nextIP();
    emit(InstructionCodes.TR_END, transactionIndexOperand, getOperand(TransactionStatus.ABORTED.value()));
    int transactionEndIp = nextIP();
    transStmtEndAddr.value = transactionEndIp;
    retryEndWithNoThrowAddr.value = transactionEndIp;
    emit(InstructionCodes.TR_END, transactionIndexOperand, getOperand(TransactionStatus.END.value()));
}

Example 5 with Instruction

use of org.wso2.ballerinalang.programfile.Instruction in project ballerina by ballerina-lang.

the class CodeGenerator method visit.

public void visit(BLangTryCatchFinally tryNode) {
    Operand gotoTryCatchEndAddr = getOperand(-1);
    Instruction instructGotoTryCatchEnd = InstructionFactory.get(InstructionCodes.GOTO, gotoTryCatchEndAddr);
    List<int[]> unhandledErrorRangeList = new ArrayList<>();
    ErrorTableAttributeInfo errorTable = createErrorTableIfAbsent(currentPkgInfo);
    // Handle try block.
    int fromIP = nextIP();
    genNode(tryNode.tryBody, env);
    int toIP = nextIP() - 1;
    // Append finally block instructions.
    if (tryNode.finallyBody != null) {
        genNode(tryNode.finallyBody, env);
    }
    emit(instructGotoTryCatchEnd);
    unhandledErrorRangeList.add(new int[] { fromIP, toIP });
    // Handle catch blocks.
    int order = 0;
    for (BLangCatch bLangCatch : tryNode.getCatchBlocks()) {
        addLineNumberInfo(bLangCatch.pos);
        int targetIP = nextIP();
        genNode(bLangCatch, env);
        unhandledErrorRangeList.add(new int[] { targetIP, nextIP() - 1 });
        // Append finally block instructions.
        if (tryNode.finallyBody != null) {
            genNode(tryNode.finallyBody, env);
        }
        emit(instructGotoTryCatchEnd);
        // Create Error table entry for this catch block
        BTypeSymbol structSymbol = bLangCatch.param.symbol.type.tsymbol;
        BPackageSymbol packageSymbol = (BPackageSymbol) bLangCatch.param.symbol.type.tsymbol.owner;
        int pkgCPIndex = addPackageRefCPEntry(currentPkgInfo, packageSymbol.pkgID);
        int structNameCPIndex = addUTF8CPEntry(currentPkgInfo, structSymbol.name.value);
        StructureRefCPEntry structureRefCPEntry = new StructureRefCPEntry(pkgCPIndex, structNameCPIndex);
        int structCPEntryIndex = currentPkgInfo.addCPEntry(structureRefCPEntry);
        StructInfo errorStructInfo = this.programFile.packageInfoMap.get(packageSymbol.pkgID.bvmAlias()).getStructInfo(structSymbol.name.value);
        ErrorTableEntry errorTableEntry = new ErrorTableEntry(fromIP, toIP, targetIP, order++, structCPEntryIndex);
        errorTableEntry.setError(errorStructInfo);
        errorTable.addErrorTableEntry(errorTableEntry);
    }
    if (tryNode.finallyBody != null) {
        // Create Error table entry for unhandled errors in try and catch(s) blocks
        for (int[] range : unhandledErrorRangeList) {
            ErrorTableEntry errorTableEntry = new ErrorTableEntry(range[0], range[1], nextIP(), order++, -1);
            errorTable.addErrorTableEntry(errorTableEntry);
        }
        // Append finally block instruction.
        genNode(tryNode.finallyBody, env);
        emit(InstructionFactory.get(InstructionCodes.THROW, getOperand(-1)));
    }
    gotoTryCatchEndAddr.value = nextIP();
}