am 2c5e7e10: Maybe fix issue #17969789: Shamu FR: Runtime restart while scrolling Instagram (e09bfb12) · Commits · e / os / android_system_core

libprocessgroup/Android.mk

+1 −1

Original line number	Diff line number	Diff line
		@@ -3,7 +3,7 @@ LOCAL_PATH := $(call my-dir)
		include $(CLEAR_VARS)
		LOCAL_SRC_FILES := processgroup.cpp
		LOCAL_MODULE := libprocessgroup
		LOCAL_SHARED_LIBRARIES := liblog
		LOCAL_SHARED_LIBRARIES := liblog libutils
		LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
		LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
		LOCAL_CFLAGS := -Wall -Werror

libprocessgroup/processgroup.cpp

+28 −4

Original line number	Diff line number	Diff line
		@@ -30,6 +30,8 @@
		#include <log/log.h>
		#include <private/android_filesystem_config.h>

		#include <utils/SystemClock.h>

		#include <processgroup/processgroup.h>
		#include "processgroup_priv.h"

		@@ -69,7 +71,7 @@ static int initCtx(uid_t uid, int pid, struct ctx *ctx)
		int fd = open(path, O_RDONLY);
		if (fd < 0) {
		ret = -errno;
		SLOGV("failed to open %s: %s", path, strerror(errno));
		SLOGW("failed to open %s: %s", path, strerror(errno));
		return ret;
		}

		@@ -78,6 +80,8 @@ static int initCtx(uid_t uid, int pid, struct ctx *ctx)
		ctx->buf_len = 0;
		ctx->initialized = true;

		SLOGV("Initialized context for %s", path);

		return 0;
		}

		@@ -87,7 +91,7 @@ static int refillBuffer(struct ctx *ctx)
		ctx->buf_ptr = ctx->buf;

		ssize_t ret = read(ctx->fd, ctx->buf_ptr + ctx->buf_len,
		sizeof(ctx->buf) - ctx->buf_len);
		sizeof(ctx->buf) - ctx->buf_len - 1);
		if (ret < 0) {
		return -errno;
		} else if (ret == 0) {
		@@ -95,6 +99,9 @@ static int refillBuffer(struct ctx *ctx)
		}

		ctx->buf_len += ret;
		ctx->buf[ctx->buf_len-1] = 0;
		SLOGV("Read %d to buffer: %s", ret, ctx->buf);

		assert(ctx->buf_len <= sizeof(ctx->buf));

		return ret;
		@@ -131,6 +138,7 @@ static pid_t getOneAppProcess(uid_t uid, int appProcessPid, struct ctx *ctx)
		return -EINVAL;
		}

		ctx->buf_len -= (eptr - ctx->buf_ptr) + 1;
		ctx->buf_ptr = eptr + 1;

		return (pid_t)pid;
		@@ -213,10 +221,22 @@ static int killProcessGroupOnce(uid_t uid, int initialPid, int signal)

		while ((pid = getOneAppProcess(uid, initialPid, &ctx)) >= 0) {
		processes++;
		SLOGV("sending processgroup kill to pid %d\n", pid);
		if (pid == 0) {
		// Should never happen... but if it does, trying to kill this
		// will boomerang right back and kill us! Let's not let that happen.
		SLOGW("Yikes, we've been told to kill pid 0! How about we don't do that.");
		continue;
		}
		if (pid != initialPid) {
		// We want to be noisy about killing processes so we can understand
		// what is going on in the log; however, don't be noisy about the base
		// process, since that it something we always kill, and we have already
		// logged elsewhere about killing it.
		SLOGI("Killing pid %d in uid %d as part of process group %d", pid, uid, initialPid);
		}
		int ret = kill(pid, signal);
		if (ret == -1) {
		SLOGV("failed to kill pid %d: %s", pid, strerror(errno));
		SLOGW("failed to kill pid %d: %s", pid, strerror(errno));
		}
		}

		@@ -231,6 +251,7 @@ int killProcessGroup(uid_t uid, int initialPid, int signal)
		{
		int processes;
		int sleep_us = 100;
		long startTime = android::uptimeMillis();

		while ((processes = killProcessGroupOnce(uid, initialPid, signal)) > 0) {
		SLOGV("killed %d processes for processgroup %d\n", processes, initialPid);
		@@ -244,6 +265,9 @@ int killProcessGroup(uid_t uid, int initialPid, int signal)
		}
		}

		SLOGV("Killed process group uid %d pid %d in %ldms, %d procs remain", uid, initialPid,
		android::uptimeMillis()-startTime, processes);

		if (processes == 0) {
		return removeProcessGroup(uid, initialPid);
		} else {