Merge "libmeminfo/procrank: Ignore failures when process disappears."

 * limitations under the License.

 */

#include <android-base/file.h>

#include <android-base/parseint.h>

#include <android-base/stringprintf.h>

#include <android-base/strings.h>

#include <dirent.h>

#include <errno.h>

#include <inttypes.h>

#include <linux/kernel-page-flags.h>

#include <linux/oom.h>

#include <meminfo/procmeminfo.h>

#include <meminfo/sysmeminfo.h>

#include <stdio.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sstream>

#include <vector>

#include <android-base/file.h>

#include <android-base/parseint.h>

#include <android-base/stringprintf.h>

#include <android-base/strings.h>

#include <meminfo/procmeminfo.h>

#include <meminfo/sysmeminfo.h>

using ::android::meminfo::MemUsage;

using ::android::meminfo::ProcMemInfo;

    auto mark_swap_usage = [&](pid_t pid) -> bool {

        ProcessRecord proc(pid, show_wss, pgflags, pgflags_mask);

        if (!proc.valid()) {

            std::cerr << "Failed to create process record for: " << pid << std::endl;

            return false;

            // Check to see if the process is still around, skip the process if the proc

            // directory is inaccessible. It was most likely killed while creating the process

            // record

            std::string procdir = ::android::base::StringPrintf("/proc/%d", pid);

            if (access(procdir.c_str(), F_OK | R_OK)) return true;

            // Warn if we failed to gather process stats even while it is still alive.

            // Return success here, so we continue to print stats for other processes.

            std::cerr << "warning: failed to create process record for: " << pid << std::endl;

            return true;

        }

        // Skip processes with no memory mappings

        return true;

    };

    // Get a list of all pids currently running in the system in

    // 1st pass through all processes. Mark each swap offset used by the process as we find them

    // for calculating proportional swap usage later.

    // Get a list of all pids currently running in the system in 1st pass through all processes.

    // Mark each swap offset used by the process as we find them for calculating proportional

    // swap usage later.

    if (!read_all_pids(&pids, mark_swap_usage)) {

        std::cerr << "Failed to read all pids from the system" << std::endl;

        exit(EXIT_FAILURE);