/
c-tracker.ts
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/
c-tracker.ts
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/********************************************************************************
* Copyright (C) 2023 Ericsson and others.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the Eclipse
* Public License v. 2.0 are satisfied: GNU General Public License, version 2
* with the GNU Classpath Exception which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
********************************************************************************/
import * as vscode from 'vscode';
import { DebugProtocol } from '@vscode/debugprotocol';
import { AdapterVariableTracker, findHexAddress, notADigit } from './adapter-capabilities';
import { toHexStringWithRadixMarker, VariableRange } from '../../common/memory-range';
import { sendRequest } from '../../common/debug-requests';
export namespace CEvaluateExpression {
export function sizeOf(expression: string): string {
return `sizeof(${expression})`;
}
export function addressOf(expression: string): string {
return `&(${expression})`;
}
};
export class CTracker extends AdapterVariableTracker {
/**
* Resolves memory location and size using evaluate requests for `$(variable.name)` and `sizeof(variable.name)`
* Ignores the presence or absence of variable.memoryReference.
*/
protected override async variableToVariableRange(variable: DebugProtocol.Variable, session: vscode.DebugSession): Promise<VariableRange | undefined> {
if (this.currentFrame === undefined || !variable.name) {
this.logger.debug('Unable to resolve', variable.name,
{ noName: !variable.name, noFrame: this.currentFrame === undefined });
return undefined;
}
try {
const [variableAddress, variableSize] = await Promise.all([
findHexAddress(variable.memoryReference) ?? this.getAddressOfVariable(variable.name, session),
this.getSizeOfVariable(variable.name, session)
]);
if (!variableAddress) { return undefined; }
const startAddress = BigInt(variableAddress);
const endAddress = variableSize !== undefined ? startAddress + variableSize : undefined;
this.logger.debug('Resolved', variable.name, { start: variableAddress, size: variableSize });
return {
name: variable.name,
startAddress: toHexStringWithRadixMarker(startAddress),
endAddress: endAddress === undefined ? undefined : toHexStringWithRadixMarker(endAddress),
value: variable.value,
type: variable.type,
};
} catch (err) {
this.logger.warn('Unable to resolve location and size of', variable.name + (err instanceof Error ? ':\n\t' + err.message : ''));
return undefined;
}
}
async getAddressOfVariable(variableName: string, session: vscode.DebugSession): Promise<string | undefined> {
const response = await sendRequest(session, 'evaluate', { expression: CEvaluateExpression.addressOf(variableName), context: 'watch', frameId: this.currentFrame });
return findHexAddress(response.result);
}
async getSizeOfVariable(variableName: string, session: vscode.DebugSession): Promise<bigint | undefined> {
const response = await sendRequest(session, 'evaluate', { expression: CEvaluateExpression.sizeOf(variableName), context: 'watch', frameId: this.currentFrame });
return notADigit.test(response.result) ? undefined : BigInt(response.result);
}
}