libevent學(xué)習(xí)之六：VS2013調(diào)試libevent源碼

今天就介紹一下vs2013 下面調(diào)試libevent源碼。不需要創(chuàng)建sln解決方案，只需要創(chuàng)建工程，包含

源碼目錄即可源碼調(diào)試。?

1、手工添加test/print-winsocke-errors.c文件，不然nmake編譯的時候會報錯。

print-winsock-errors.c源代碼程序：

#include#include#include#include#include?"event2/event.h"
#include?"event2/util.h"
#include?"event2/thread.h"

#define?E(x)?printf?(#x?"?->?"%s"n",?evutil_socket_error_to_string?(x));

int?main?(int?argc,?char?**argv)
{
??int?i,?j;
??const?char?*s1,?*s2;

#ifdef?EVTHREAD_USE_WINDOWS_THREADS_IMPLEMENTED
??evthread_use_windows_threads?();
#endif

??s1?=?evutil_socket_error_to_string?(WSAEINTR);

??for?(i?=?0;?i?<?3;?i++)?{
????printf?("niteration?%d:nn",?i);
????E(WSAEINTR);
????E(WSAEACCES);
????E(WSAEFAULT);
????E(WSAEINVAL);
????E(WSAEMFILE);
????E(WSAEWOULDBLOCK);
????E(WSAEINPROGRESS);
????E(WSAEALREADY);
????E(WSAENOTSOCK);
????E(WSAEDESTADDRREQ);
????E(WSAEMSGSIZE);
????E(WSAEPROTOTYPE);
????E(WSAENOPROTOOPT);
????E(WSAEPROTONOSUPPORT);
????E(WSAESOCKTNOSUPPORT);
????E(WSAEOPNOTSUPP);
????E(WSAEPFNOSUPPORT);
????E(WSAEAFNOSUPPORT);
????E(WSAEADDRINUSE);
????E(WSAEADDRNOTAVAIL);
????E(WSAENETDOWN);
????E(WSAENETUNREACH);
????E(WSAENETRESET);
????E(WSAECONNABORTED);
????E(WSAECONNRESET);
????E(WSAENOBUFS);
????E(WSAEISCONN);
????E(WSAENOTCONN);
????E(WSAESHUTDOWN);
????E(WSAETIMEDOUT);
????E(WSAECONNREFUSED);
????E(WSAEHOSTDOWN);
????E(WSAEHOSTUNREACH);
????E(WSAEPROCLIM);
????E(WSASYSNOTREADY);
????E(WSAVERNOTSUPPORTED);
????E(WSANOTINITIALISED);
????E(WSAEDISCON);
????E(WSATYPE_NOT_FOUND);
????E(WSAHOST_NOT_FOUND);
????E(WSATRY_AGAIN);
????E(WSANO_RECOVERY);
????E(WSANO_DATA);
????E(0xdeadbeef);?/*?test?the?case?where?no?message?is?available?*/

????/*?fill?up?the?hash?table?a?bit?to?make?sure?it?grows?properly?*/
????for?(j?=?0;?j?<?50;?j++)?{
??????int?err;
??????evutil_secure_rng_get_bytes(&err,?sizeof(err));
??????evutil_socket_error_to_string(err);
????}
??}

??s2?=?evutil_socket_error_to_string?(WSAEINTR);
??if?(s1?!=?s2)
????printf?("caching?failed!n");

??libevent_global_shutdown?();

??return?EXIT_SUCCESS;
}

2、修改Makefile.nmake?

將?

CFLAGS=$(CFLAGS)?/Ox?/W3?/wd4996?/nologo

改為?

CFLAGS=$(CFLAGS)?/Od?/W3?/wd4996?/nologo?/Zi

使用/Od禁止優(yōu)化，使用/Zi 生成調(diào)試信息。

3、vs2013命令行編譯：nmake /f Makefile.nmake

編譯生成：

4、新建工程，附加源碼調(diào)試

解決方案包含源代碼目錄：

?

　　以上三個目錄添加到VC的附加庫目錄。

　 ? lib包含目錄添加剛才生成的

　　所在目錄

5、源碼跟蹤調(diào)試

F11跳入源碼調(diào)試：

附上測試代碼：

//?libevent-test.cpp?:?定義控制臺應(yīng)用程序的入口點。
//

#include?"stdafx.h"

#pragma?comment(lib,"ws2_32.lib")
#pragma?comment(lib,"wsock32.lib")
#pragma?comment(lib,"libevent.lib")
#pragma?comment(lib,"libevent_core.lib")
#pragma?comment(lib,"libevent_extras.lib")



#include#include#include#ifndef?_WIN32
#include#include#endif
#include#ifdef?EVENT__HAVE_SYS_TIME_H
#include#endif
#include#include#include#include#include#include#include#include#ifdef?_WIN32
#include#endif

struct?timeval?lasttime;

int?event_is_persistent;

static?void
timeout_cb(evutil_socket_t?fd,?short?event,?void?*arg)
{
????struct?timeval?newtime,?difference;
????struct?event?*timeout?=?(struct?event?*)arg;
????double?elapsed;

????evutil_gettimeofday(&newtime,?NULL);
????evutil_timersub(&newtime,?&lasttime,?&difference);
????elapsed?=?difference.tv_sec?+
????????(difference.tv_usec?/?1.0e6);

????printf("timeout_cb?called?at?%d:?%.3f?seconds?elapsed.n",
????????(int)newtime.tv_sec,?elapsed);
????lasttime?=?newtime;

????if?(!event_is_persistent)?{
????????struct?timeval?tv;
????????evutil_timerclear(&tv);
????????tv.tv_sec?=?2;
????????event_add(timeout,?&tv);
????}
}

int
main(int?argc,?char?**argv)
{
????struct?event?timeout;
????struct?timeval?tv;
????struct?event_base?*base;
????int?flags;

#ifdef?_WIN32
????WORD?wVersionRequested;
????WSADATA?wsaData;

????wVersionRequested?=?MAKEWORD(2,?2);

????(void)WSAStartup(wVersionRequested,?&wsaData);
#endif

????if?(argc?==?2?&&?!strcmp(argv[1],?"-p"))?{
????????event_is_persistent?=?1;
????????flags?=?EV_PERSIST;
????}
????else?{
????????event_is_persistent?=?0;
????????flags?=?0;
????}

????/*?Initalize?the?event?library?*/
????base?=?event_base_new();

????/*?Initalize?one?event?*/
????event_assign(&timeout,?base,?-1,?flags,?timeout_cb,?(void*)&timeout);

????evutil_timerclear(&tv);
????tv.tv_sec?=?2;
????event_add(&timeout,?&tv);

????evutil_gettimeofday(&lasttime,?NULL);

????event_base_dispatch(base);

????return?(0);
}

原文鏈接：https://www.cnblogs.com/Forever-Kenlen-Ja/p/7487207.html