Merge "Pass the correct user ID to SetProcessProfilesCached()" into main

#include <meminfo/sysmeminfo.h>

#include <processgroup/processgroup.h>

#include <processgroup/sched_policy.h>

#include <android-base/logging.h>

#include <android-base/unique_fd.h>

#include <algorithm>

    }

}

// Look up the user ID of a process in /proc/${pid}/status. The Uid: line is present in

// /proc/${pid}/status since at least kernel v2.5.

static int uid_from_pid(int pid)

{

    int uid = -1;

    std::array<char, 64> path;

    int res = snprintf(path.data(), path.size(), "/proc/%d/status", pid);

    if (res < 0 || res >= static_cast<int>(path.size())) {

        DCHECK(false);

        return uid;

    }

    FILE* f = fopen(path.data(), "r");

    if (!f) {

        return uid;

    }

    char line[256];

    while (fgets(line, sizeof(line), f)) {

        if (sscanf(line, "Uid: %d", &uid) == 1) {

            break;

        }

    }

    fclose(f);

    return uid;

}

void android_os_Process_setProcessGroup(JNIEnv* env, jobject clazz, int pid, jint grp)

{

    ALOGV("%s pid=%d grp=%" PRId32, __func__, pid, grp);

        }

    }

    if (!SetProcessProfilesCached(0, pid, {get_cpuset_policy_profile_name((SchedPolicy)grp)}))

    const int uid = uid_from_pid(pid);

    if (uid < 0) {

        signalExceptionForGroupError(env, ESRCH, pid);

        return;

    }

    if (!SetProcessProfilesCached(uid, pid, {get_cpuset_policy_profile_name((SchedPolicy)grp)}))

        signalExceptionForGroupError(env, errno ? errno : EPERM, pid);

}