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[platform] fix linux findWmpfProcess to select root process #271

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Merged
evi0s merged 2 commits into from
Sep 11, 2026
Merged

[platform] fix linux findWmpfProcess to select root process #271

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d8b966d
[platform] fix linux findWmpfProcess to select root process
GuGuMur Sep 6, 2026
22f6d0c
[platform] fix linux process detection with PID map
GuGuMur Sep 6, 2026
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33 changes: 12 additions & 21 deletions src/platform/linux.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -18,34 +18,25 @@ export class LinuxPlatform implements IPlatform {
const processes = await localDevice.enumerateProcesses({
scope: frida.Scope.Metadata,
});
const wmpfProcesses = processes.filter(
(process) => process.name === "WeChatAppEx",
);
const wmpfPids = wmpfProcesses.map((p) =>
p.parameters.ppid ? p.parameters.ppid : 0,
);
const pidMap = new Map(processes.map(p => [p.pid, p]));
const rootWmpf = processes.find(p => {
if (p.name !== "WeChatAppEx") return false;
const ppid = Number(p.parameters.ppid);
if (!ppid) return false;
return pidMap.get(ppid)?.name !== "WeChatAppEx";
});

// find the parent process
const wmpfPid = wmpfPids
.sort(
(a, b) =>
wmpfPids.filter((v) => v === a).length -
wmpfPids.filter((v) => v === b).length,
)
.pop();
if (wmpfPid === undefined) {
throw new Error("[frida] WeChatAppEx process not found");
if (!rootWmpf) {
throw new Error("[frida] WeChatAppEx root process not found");
}
const wmpfProcess = processes.filter(
(process) => process.pid === wmpfPid,
)[0];
const wmpfProcessPath = wmpfProcess.parameters.path as string | undefined;

const wmpfProcessPath = rootWmpf.parameters.path as string | undefined;
const wmpfVersion = wmpfProcessPath
? searchWmpfVersionInFile(wmpfProcessPath)
: 0;
if (wmpfVersion === 0) {
throw new Error("[frida] error in find wmpf version");
}
return { pid: Number(wmpfPid), version: wmpfVersion };
return { pid: rootWmpf.pid, version: wmpfVersion };
}
}