src/goToolPprof: execFile instead of exec

Fixes golang/vscode-go#1779

Change-Id: I6e5f6f91cac34c2d0195cb4f4fd564da840b7643
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/350739
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Trust: Hyang-Ah Hana Kim <hyangah@gmail.com>
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>

src/goToolPprof.ts

diff --git a/src/goToolPprof.ts b/src/goToolPprof.ts
index ef1bc91..d947006 100644
--- a/src/goToolPprof.ts
+++ b/src/goToolPprof.ts
@@ -2,7 +2,7 @@
  * Copyright 2021 The Go Authors. All rights reserved.
  * Licensed under the MIT License. See LICENSE in the project root for license information.
  *--------------------------------------------------------*/
-import { exec } from 'child_process';
+import { execFile } from 'child_process';
 import { window, CancellationToken, TextDocumentContentProvider, Uri } from 'vscode';
 import { outputChannel } from './goStatus';
 import { getBinPath } from './util';
@@ -15,7 +15,7 @@
 	private pprof(uri: Uri, token: CancellationToken) {
 		const goBin = getBinPath('go');
 		return new Promise<string | undefined>((resolve) => {
-			const cp = exec(`${goBin} tool pprof -tree ${uri.fsPath}`, async (err, stdout, stderr) => {
+			const cp = execFile(goBin, ['tool', 'pprof', '-tree', uri.fsPath], async (err, stdout, stderr) => {
 				if (err || stderr) {
 					const m = 'Failed to execute `go tool pprof`';
 					if (err) outputChannel.appendLine(`${m}: ${err}`);