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ZLMediaKit
Commit 4b9b0226 by xiongziliang
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优化进程管理代码: #1518

parent 43c5d05d
正在显示 包含 80 行增加 和 123 行删除
server/Process.cpp
......@@ -14,81 +14,100 @@
#include <sys/resource.h>
#include <unistd.h>
#else
//#include <TlHelp32.h>
#include <windows.h>
#include <io.h>
#include <windows.h>
#endif
#include <csignal>
#include <stdexcept>
#include <signal.h>
#include "Util/util.h"
#include "Process.h"
#include "Util/File.h"
#include "Util/util.h"
#include "Util/logger.h"
#include "Util/uv_errno.h"
#include "Poller/EventPoller.h"
#include "Process.h"
#define STACK_SIZE (8192*1024)
using namespace toolkit;
#define STACK_SIZE (8192 * 1024)
using namespace std;
using namespace toolkit;
#ifndef _WIN32
typedef struct
{
const char *cmd_path;
char **cmd_args;
const char *log_file;
} params_t;
static int /* Start function for cloned child */
childFunc(params_t *params)
{
static void setupChildProcess() {
//取消cpu亲和性设置，防止FFmpeg进程cpu占用率不能超过100%的问题
setThreadAffinity(-1);
//子进程关闭core文件生成
struct rlimit rlim = {0, 0};
struct rlimit rlim = { 0, 0 };
setrlimit(RLIMIT_CORE, &rlim);
//重定向shell日志至文件
char log_path[strlen(params->log_file) + 20];
memset(log_path,0,sizeof(log_path));
if (strlen(params->log_file) <= 1) {
//子进程恢复默认信号处理
signal(SIGINT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGSEGV, SIG_DFL);
signal(SIGABRT, SIG_DFL);
}
/* Start function for cloned child */
static int runChildProcess(const string &cmd, string &log_file_tmp) {
setupChildProcess();
string log_file;
if (log_file_tmp.empty()) {
//未指定子进程日志文件时，重定向至/dev/null
snprintf(log_path, sizeof(log_path), "%s", "/dev/null");
log_file = "/dev/null";
} else {
snprintf(log_path, sizeof(log_path), "%s.%d", params->log_file, getpid());
log_file = StrPrinter << log_file_tmp << "." << getpid();
}
auto fp = File::create_file(params->log_file, "ab");
//重定向shell日志至文件
auto fp = File::create_file(log_file.data(), "ab");
if (!fp) {
fprintf(stderr, "open log file %s failed:%d(%s)\r\n", log_path, get_uv_error(), get_uv_errmsg());
fprintf(stderr, "open log file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
} else {
auto log_fd = fileno(fp);
// dup to stdout and stderr.
if (dup2(log_fd, STDOUT_FILENO) < 0) {
fprintf(stderr, "dup2 stdout file %s failed:%d(%s)\r\n", log_path, get_uv_error(), get_uv_errmsg());
fprintf(stderr, "dup2 stdout file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
}
if (dup2(log_fd, STDERR_FILENO) < 0) {
fprintf(stderr, "dup2 stderr file %s failed:%d(%s)\r\n", log_path, get_uv_error(), get_uv_errmsg());
fprintf(stderr, "dup2 stderr file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
}
// 关闭日志文件
::fclose(fp);
}
fprintf(stderr, "\r\n\r\n#### pid=%d,cmd=%s%s #####\r\n\r\n", getpid(), params->cmd_path, *params->cmd_args);
fprintf(stderr, "\r\n\r\n#### pid=%d,cmd=%s #####\r\n\r\n", getpid(), cmd.data());
auto params = split(cmd, " ");
// memory leak in child process, it's ok.
char **charpv_params = new char *[params.size() + 1];
for (int i = 0; i < (int)params.size(); i++) {
std::string &p = params[i];
charpv_params[i] = (char *)p.data();
}
// EOF: NULL
charpv_params[params.size()] = NULL;
// TODO: execv or execvp
auto ret = execv(params->cmd_path, params->cmd_args);
auto ret = execv(params[0].c_str(), charpv_params);
delete[] charpv_params;
if (ret < 0) {
fprintf(stderr, "clone process failed:%d(%s)\r\n", get_uv_error(), get_uv_errmsg());
fprintf(stderr, "execv process failed:%d(%s)\r\n", get_uv_error(), get_uv_errmsg());
}
return ret;
}
static int cloneFunc(void *ptr) {
auto pair = reinterpret_cast<std::pair<string, string> *>(ptr);
return runChildProcess(pair->first, pair->second);
}
#endif
void Process::run(const string &cmd, string &log_file_tmp) {
kill(2000);
#ifdef _WIN32
STARTUPINFO si = {0};
PROCESS_INFORMATION pi = {0};
STARTUPINFO si = { 0 };
PROCESS_INFORMATION pi = { 0 };
string log_file;
if (log_file_tmp.empty()) {
//未指定子进程日志文件时，重定向至/dev/null
......@@ -106,16 +125,16 @@ void Process::run(const string &cmd, string &log_file_tmp) {
auto log_fd = (HANDLE)(_get_osfhandle(_fileno(fp)));
// dup to stdout and stderr.
si.wShowWindow = SW_HIDE;
// STARTF_USESHOWWINDOW:The wShowWindow member contains additional information.
// STARTF_USESTDHANDLES:The hStdInput, hStdOutput, and hStdError members contain additional information.
// STARTF_USESHOWWINDOW:The wShowWindow member contains additional information.
// STARTF_USESTDHANDLES:The hStdInput, hStdOutput, and hStdError members contain additional information.
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
si.hStdError = log_fd;
si.hStdOutput = log_fd;
}
LPTSTR lpDir = const_cast<char*>(cmd.data());
if (CreateProcess(NULL, lpDir, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)){
//下面两行关闭句柄，解除本进程和新进程的关系，不然有可能 不小心调用TerminateProcess函数关掉子进程
LPTSTR lpDir = const_cast<char *>(cmd.data());
if (CreateProcess(NULL, lpDir, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)) {
//下面两行关闭句柄，解除本进程和新进程的关系，不然有可能 不小心调用TerminateProcess函数关掉子进程
CloseHandle(pi.hThread);
_pid = pi.dwProcessId;
_handle = pi.hProcess;
......@@ -127,89 +146,27 @@ void Process::run(const string &cmd, string &log_file_tmp) {
fclose(fp);
#elif ((defined(__linux) || defined(__linux__)))
_process_stack = malloc(STACK_SIZE);
auto params = split(cmd, " ");
// memory leak in child process, it's ok.
char **char_params = new char *[params.size() + 1];
for (int i = 0; i < (int) params.size(); i++) {
std::string &p = params[i];
char_params[i] = (char *) p.data();
}
// EOF: NULL
char_params[params.size()] = NULL;
params_t cmd_params = {params[0].c_str(), char_params, log_file_tmp.c_str()};
int clonePid = clone(reinterpret_cast<int (*)(void *)>(&childFunc), (char *)_process_stack + STACK_SIZE, CLONE_FS | SIGCHLD, (void *) (&cmd_params));
delete[] char_params;
if (clonePid == -1) {
auto args = std::make_pair(cmd, log_file_tmp);
int pid = clone(reinterpret_cast<int (*)(void *)>(&cloneFunc), (char *)_process_stack + STACK_SIZE, CLONE_FS | SIGCHLD, (void *)(&args));
if (pid == -1) {
WarnL << "clone process failed:" << get_uv_errmsg();
free(_process_stack);
throw std::runtime_error(StrPrinter << "fork child process failed,err:" << get_uv_errmsg());
}
_pid = clonePid;
if(log_file_tmp.empty()) {
_pid = pid;
if (log_file_tmp.empty()) {
InfoL << "start child process " << _pid << ", log file:" << "/dev/null";
}else {
} else {
InfoL << "start child process " << _pid << ", log file:" << log_file_tmp.c_str() << "." << _pid;
}
#else
_pid = vfork();
_pid = fork();
if (_pid < 0) {
throw std::runtime_error(StrPrinter << "fork child process failed,err:" << get_uv_errmsg());
}
if (_pid == 0) {
//取消cpu亲和性设置，防止FFmpeg进程cpu占用率不能超过100%的问题
setThreadAffinity(-1);
string log_file;
if (log_file_tmp.empty()) {
//未指定子进程日志文件时，重定向至/dev/null
log_file = "/dev/null";
} else {
log_file = StrPrinter << log_file_tmp << "." << getpid();
}
//子进程关闭core文件生成
struct rlimit rlim = {0, 0};
setrlimit(RLIMIT_CORE, &rlim);
//在启动子进程时，暂时禁用SIGINT、SIGTERM信号
signal(SIGINT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGSEGV, SIG_DFL);
signal(SIGABRT, SIG_DFL);
//重定向shell日志至文件
auto fp = File::create_file(log_file.data(), "ab");
if (!fp) {
fprintf(stderr, "open log file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
} else {
auto log_fd = fileno(fp);
// dup to stdout and stderr.
if (dup2(log_fd, STDOUT_FILENO) < 0) {
fprintf(stderr, "dup2 stdout file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
}
if (dup2(log_fd, STDERR_FILENO) < 0) {
fprintf(stderr, "dup2 stderr file %s failed:%d(%s)\r\n", log_file.data(), get_uv_error(), get_uv_errmsg());
}
// 关闭日志文件
::fclose(fp);
}
fprintf(stderr, "\r\n\r\n#### pid=%d,cmd=%s #####\r\n\r\n", getpid(), cmd.data());
auto params = split(cmd, " ");
// memory leak in child process, it's ok.
char **charpv_params = new char *[params.size() + 1];
for (int i = 0; i < (int) params.size(); i++) {
std::string &p = params[i];
charpv_params[i] = (char *) p.data();
}
// EOF: NULL
charpv_params[params.size()] = NULL;
// TODO: execv or execvp
auto ret = execv(params[0].c_str(), charpv_params);
if (ret < 0) {
fprintf(stderr, "fork process failed:%d(%s)\r\n", get_uv_error(), get_uv_errmsg());
}
exit(ret);
//子进程
exit(runChildProcess(cmd, log_file_tmp));
}
string log_file;
......@@ -244,16 +201,16 @@ static bool s_wait(pid_t pid, void *handle, int *exit_code_ptr, bool block) {
code = WaitForSingleObject(handle, 0);
}
if(code == WAIT_FAILED || code == WAIT_OBJECT_0){
if (code == WAIT_FAILED || code == WAIT_OBJECT_0) {
//子进程已经退出了,获取子进程退出代码
DWORD exitCode = 0;
if(exit_code_ptr && GetExitCodeProcess(handle, &exitCode)){
if (exit_code_ptr && GetExitCodeProcess(handle, &exitCode)) {
*exit_code_ptr = exitCode;
}
return false;
}
if(code == WAIT_TIMEOUT){
if (code == WAIT_TIMEOUT) {
//子进程还在线
return true;
}
......@@ -282,14 +239,14 @@ static bool s_wait(pid_t pid, void *handle, int *exit_code_ptr, bool block) {
#ifdef _WIN32
// Inspired from http://stackoverflow.com/a/15281070/1529139
// and http://stackoverflow.com/q/40059902/1529139
bool signalCtrl(DWORD dwProcessId, DWORD dwCtrlEvent){
bool signalCtrl(DWORD dwProcessId, DWORD dwCtrlEvent) {
bool success = false;
DWORD thisConsoleId = GetCurrentProcessId();
// Leave current console if it exists
// (otherwise AttachConsole will return ERROR_ACCESS_DENIED)
bool consoleDetached = (FreeConsole() != FALSE);
if (AttachConsole(dwProcessId) != FALSE){
if (AttachConsole(dwProcessId) != FALSE) {
// Add a fake Ctrl-C handler for avoid instant kill is this console
// WARNING: do not revert it or current program will be also killed
SetConsoleCtrlHandler(nullptr, true);
......@@ -297,11 +254,11 @@ bool signalCtrl(DWORD dwProcessId, DWORD dwCtrlEvent){
FreeConsole();
}
if (consoleDetached){
if (consoleDetached) {
// Create a new console if previous was deleted by OS
if (AttachConsole(thisConsoleId) == FALSE){
if (AttachConsole(thisConsoleId) == FALSE) {
int errorCode = GetLastError();
if (errorCode == 31){
if (errorCode == 31) {
// 31=ERROR_GEN_FAILURE
AllocConsole();
}
......@@ -313,17 +270,17 @@ bool signalCtrl(DWORD dwProcessId, DWORD dwCtrlEvent){
static void s_kill(pid_t pid, void *handle, int max_delay, bool force) {
if (pid <= 0) {
//pid无效
// pid无效
return;
}
#ifdef _WIN32
//windows下目前没有比较好的手段往子进程发送SIGTERM或信号
// windows下目前没有比较好的手段往子进程发送SIGTERM或信号
//所以杀死子进程的方式全部强制为立即关闭
force = true;
if(force){
if (force) {
//强制关闭子进程
TerminateProcess(handle, 0);
}else{
} else {
//非强制关闭，发送Ctr+C信号
signalCtrl(pid, CTRL_C_EVENT);
}
......@@ -362,12 +319,12 @@ void Process::kill(int max_delay, bool force) {
s_kill(_pid, _handle, max_delay, force);
_pid = -1;
#ifdef _WIN32
if(_handle){
if (_handle) {
CloseHandle(_handle);
_handle = nullptr;
}
#elif ((defined(__linux) || defined(__linux__)))
if(_process_stack){
if (_process_stack) {
free(_process_stack);
_process_stack = nullptr;
}
......
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