fix: optimize windows process tree retrieval to prevent hang

packages/core/src/ide/process-utils.test.ts

@@ -65,132 +65,93 @@ describe('getIdeProcessInfo', () => {
   describe('on Windows', () => {
     it('should traverse up and find the great-grandchild of the root process', async () => {
       (os.platform as Mock).mockReturnValue('win32');
-      const processInfoMap = new Map([
-        [
-          1000,
-          {
-            stdout:
-              '{"Name":"node.exe","ParentProcessId":900,"CommandLine":"node.exe"}',
-          },
-        ],
-        [
-          900,
-          {
-            stdout:
-              '{"Name":"powershell.exe","ParentProcessId":800,"CommandLine":"powershell.exe"}',
-          },
-        ],
-        [
-          800,
-          {
-            stdout:
-              '{"Name":"code.exe","ParentProcessId":700,"CommandLine":"code.exe"}',
-          },
-        ],
-        [
-          700,
-          {
-            stdout:
-              '{"Name":"wininit.exe","ParentProcessId":0,"CommandLine":"wininit.exe"}',
-          },
-        ],
-      ]);
-      mockedExec.mockImplementation((command: string) => {
-        const pidMatch = command.match(/ProcessId=(\d+)/);
-        if (pidMatch) {
-          const pid = parseInt(pidMatch[1], 10);
-          return Promise.resolve(processInfoMap.get(pid));
+
+      const processes = [
+        {
+          ProcessId: 1000,
+          ParentProcessId: 900,
+          Name: 'node.exe',
+          CommandLine: 'node.exe',
+        },
+        {
+          ProcessId: 900,
+          ParentProcessId: 800,
+          Name: 'powershell.exe',
+          CommandLine: 'powershell.exe',
+        },
+        {
+          ProcessId: 800,
+          ParentProcessId: 700,
+          Name: 'code.exe',
+          CommandLine: 'code.exe',
+        },
+        {
+          ProcessId: 700,
+          ParentProcessId: 0,
+          Name: 'wininit.exe',
+          CommandLine: 'wininit.exe',
+        },
+      ];
+
+      mockedExec.mockImplementation((file: string, _args: string[]) => {
+        if (file === 'powershell') {
+          return Promise.resolve({ stdout: JSON.stringify(processes) });
         }
-        return Promise.reject(new Error('Invalid command for mock'));
+        // Fallback for getProcessInfo calls if any (should not happen in new logic for Windows traversal)
+        return Promise.resolve({ stdout: '' });
       });
 
       const result = await getIdeProcessInfo();
+      // 1000 -> 900 -> 800 -> 700 (root child)
+      // Great-grandchild of root (700) is 900.
+      // Wait, logic is:
+      // 700 (root child) -> 800 (grandchild) -> 900 (great-grandchild) -> 1000 (current)
+      // The code looks for the grandchild of the root.
+      // Root is 0 (conceptually). Child of root is 700. Grandchild is 800.
+      // The code says:
+      // "We've found the grandchild of the root (`currentPid`). The IDE process is its child, which we've stored in `previousPid`."
+
+      // Let's trace the loop in `getIdeProcessInfoForWindows`:
+      // currentPid = 1000, previousPid = 1000
+      // Loop 1:
+      //   proc = 1000. parentPid = 900.
+      //   parentProc = 900. parentProc.parentPid = 800 != 0.
+      //   previousPid = 1000. currentPid = 900.
+      // Loop 2:
+      //   proc = 900. parentPid = 800.
+      //   parentProc = 800. parentProc.parentPid = 700 != 0.
+      //   previousPid = 900. currentPid = 800.
+      // Loop 3:
+      //   proc = 800. parentPid = 700.
+      //   parentProc = 700. parentProc.parentPid = 0.
+      //   MATCH!
+      //   ideProc = processMap.get(previousPid) = processMap.get(900) = powershell.exe
+      //   return { pid: 900, command: 'powershell.exe' }
+
       expect(result).toEqual({ pid: 900, command: 'powershell.exe' });
     });
 
-    it('should handle non-existent process gracefully', async () => {
+    it('should handle empty process list gracefully', async () => {
       (os.platform as Mock).mockReturnValue('win32');
-      mockedExec
-        .mockResolvedValueOnce({ stdout: '' }) // Non-existent PID returns empty due to -ErrorAction SilentlyContinue
-        .mockResolvedValueOnce({
-          stdout:
-            '{"Name":"fallback.exe","ParentProcessId":0,"CommandLine":"fallback.exe"}',
-        }); // Fallback call
+      mockedExec.mockResolvedValue({ stdout: '[]' });
 
       const result = await getIdeProcessInfo();
-      expect(result).toEqual({ pid: 1000, command: 'fallback.exe' });
+      // Should return current pid and empty command because process not found in map
+      expect(result).toEqual({ pid: 1000, command: '' });
     });
 
     it('should handle malformed JSON output gracefully', async () => {
       (os.platform as Mock).mockReturnValue('win32');
-      mockedExec
-        .mockResolvedValueOnce({ stdout: '{"invalid":json}' }) // Malformed JSON
-        .mockResolvedValueOnce({
-          stdout:
-            '{"Name":"fallback.exe","ParentProcessId":0,"CommandLine":"fallback.exe"}',
-        }); // Fallback call
+      mockedExec.mockResolvedValue({ stdout: '{"invalid":json}' }); // Malformed JSON will throw in JSON.parse
+
+      // If JSON.parse fails, getProcessTreeForWindows returns empty map.
+      // Then getIdeProcessInfoForWindows returns current pid.
+
+      // Wait, mockedExec throws? No, JSON.parse throws.
+      // getProcessTreeForWindows catches error and returns empty map.
 
       const result = await getIdeProcessInfo();
-      expect(result).toEqual({ pid: 1000, command: 'fallback.exe' });
-    });
-
-    it('should handle PowerShell errors without crashing the process chain', async () => {
-      (os.platform as Mock).mockReturnValue('win32');
-      const processInfoMap = new Map([
-        [1000, { stdout: '' }], // First process doesn't exist (empty due to -ErrorAction)
-        [
-          1001,
-          {
-            stdout:
-              '{"Name":"parent.exe","ParentProcessId":800,"CommandLine":"parent.exe"}',
-          },
-        ],
-        [
-          800,
-          {
-            stdout:
-              '{"Name":"ide.exe","ParentProcessId":0,"CommandLine":"ide.exe"}',
-          },
-        ],
-      ]);
-
-      // Mock the process.pid to test traversal with missing processes
-      Object.defineProperty(process, 'pid', {
-        value: 1001,
-        configurable: true,
-      });
-
-      mockedExec.mockImplementation((command: string) => {
-        const pidMatch = command.match(/ProcessId=(\d+)/);
-        if (pidMatch) {
-          const pid = parseInt(pidMatch[1], 10);
-          return Promise.resolve(processInfoMap.get(pid) || { stdout: '' });
-        }
-        return Promise.reject(new Error('Invalid command for mock'));
-      });
-
-      const result = await getIdeProcessInfo();
-      // Should return the current process command since traversal continues despite missing processes
-      expect(result).toEqual({ pid: 1001, command: 'parent.exe' });
-
-      // Reset process.pid
-      Object.defineProperty(process, 'pid', {
-        value: 1000,
-        configurable: true,
-      });
-    });
-
-    it('should handle partial JSON data with defaults', async () => {
-      (os.platform as Mock).mockReturnValue('win32');
-      mockedExec
-        .mockResolvedValueOnce({ stdout: '{"Name":"partial.exe"}' }) // Missing ParentProcessId, defaults to 0
-        .mockResolvedValueOnce({
-          stdout:
-            '{"Name":"root.exe","ParentProcessId":0,"CommandLine":"root.exe"}',
-        }); // Get grandparent info
-
-      const result = await getIdeProcessInfo();
-      expect(result).toEqual({ pid: 1000, command: 'root.exe' });
+      expect(result).toEqual({ pid: 1000, command: '' });
     });
   });
 });

packages/core/src/ide/process-utils.ts

@@ -4,12 +4,13 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { exec } from 'node:child_process';
+import { exec, execFile } from 'node:child_process';
 import { promisify } from 'node:util';
 import os from 'node:os';
 import path from 'node:path';
 
 const execAsync = promisify(exec);
+const execFileAsync = promisify(execFile);
 
 const MAX_TRAVERSAL_DEPTH = 32;
 
@@ -36,7 +37,13 @@ async function getProcessInfo(pid: number): Promise<{
         '| ConvertTo-Json',
         '}',
       ].join(' ');
-      const { stdout } = await execAsync(`powershell "${powershellCommand}"`);
+
+      const { stdout } = await execFileAsync('powershell', [
+        '-NoProfile',
+        '-NonInteractive',
+        '-Command',
+        powershellCommand,
+      ]);
       const output = stdout.trim();
       if (!output) return { parentPid: 0, name: '', command: '' };
       const {
@@ -124,6 +131,37 @@ async function getIdeProcessInfoForUnix(): Promise<{
   return { pid: currentPid, command };
 }
 
+async function getProcessTreeForWindows(): Promise<
+  Map<number, { parentPid: number; name: string; command: string }>
+> {
+  try {
+    const powershellCommand =
+      'Get-CimInstance Win32_Process | Select-Object ProcessId, ParentProcessId, Name, CommandLine | ConvertTo-Json -Depth 1';
+    const { stdout } = await execFileAsync(
+      'powershell',
+      ['-NoProfile', '-NonInteractive', '-Command', powershellCommand],
+      { maxBuffer: 10 * 1024 * 1024 },
+    );
+
+    const processes = JSON.parse(stdout);
+    const map = new Map();
+
+    const list = Array.isArray(processes) ? processes : [processes];
+
+    for (const p of list) {
+      map.set(p.ProcessId, {
+        parentPid: p.ParentProcessId,
+        name: p.Name,
+        command: p.CommandLine || '',
+      });
+    }
+    return map;
+  } catch (e) {
+    console.error('Failed to get process tree:', e);
+    return new Map();
+  }
+}
+
 /**
  * Finds the IDE process info on Windows.
  *
@@ -135,39 +173,33 @@ async function getIdeProcessInfoForWindows(): Promise<{
   pid: number;
   command: string;
 }> {
+  const processMap = await getProcessTreeForWindows();
   let currentPid = process.pid;
   let previousPid = process.pid;
 
   for (let i = 0; i < MAX_TRAVERSAL_DEPTH; i++) {
-    try {
-      const { parentPid } = await getProcessInfo(currentPid);
+    const proc = processMap.get(currentPid);
+    if (!proc) break;
 
-      if (parentPid > 0) {
-        try {
-          const { parentPid: grandParentPid } = await getProcessInfo(parentPid);
-          if (grandParentPid === 0) {
-            // We've found the grandchild of the root (`currentPid`). The IDE
-            // process is its child, which we've stored in `previousPid`.
-            const { command } = await getProcessInfo(previousPid);
-            return { pid: previousPid, command };
-          }
-        } catch {
-          // getting grandparent failed, proceed
-        }
-      }
+    const parentPid = proc.parentPid;
 
-      if (parentPid <= 0) {
-        break; // Reached the root
+    if (parentPid > 0) {
+      const parentProc = processMap.get(parentPid);
+      if (parentProc && parentProc.parentPid === 0) {
+        // We've found the grandchild of the root (`currentPid`). The IDE
+        // process is its child, which we've stored in `previousPid`.
+        const ideProc = processMap.get(previousPid);
+        return { pid: previousPid, command: ideProc?.command || '' };
       }
-      previousPid = currentPid;
-      currentPid = parentPid;
-    } catch {
-      // Process in chain died
-      break;
     }
+
+    if (parentPid <= 0) break;
+    previousPid = currentPid;
+    currentPid = parentPid;
   }
-  const { command } = await getProcessInfo(currentPid);
-  return { pid: currentPid, command };
+
+  const currentProc = processMap.get(currentPid);
+  return { pid: currentPid, command: currentProc?.command || '' };
 }
 
 /**