最近，想一个问题，redis 到底有几个线程，百思不得其解，为寻究竟，看源码，静态看源码后，有了大概结论，想证实一下，编译源码，debug，修改，测试

准备

工具
mac
redis 5.0
Clion

编译

记录下源码编译步骤

先下载源码，我这边下载的是5.0 git clone https://github.com/redis/redis.git，切到 5.0 分支
安装 cmake，brew install cmake, 这个步骤，我执行了蛮久，中间出现的warning，不用管，最后安装好就行

添加 CMakeLists.txt

在deps/hiredis根目录下面添加CMakeLists.txt文件，内容如下:

add_library(hiredis STATIC
       hiredis.c
       net.c
       dict.c
       sds.c
       async.c
       read.c
       )

在deps/linenoise根目录下面添加CMakeLists.txt文件，内容如下:
```
add_library(linenoise linenoise.c)
```

在deps/lua根目录下面添加CMakeLists.txt文件，内容如下:

set(LUA_SRC
       src/lapi.c src/lcode.c src/ldebug.c src/ldo.c src/ldump.c src/lfunc.c 
       src/lgc.c src/llex.c src/lmem.c
       src/lobject.c src/lopcodes.c src/lparser.c src/lstate.c src/lstring.c
       src/ltable.c src/ltm.c
       src/lundump.c src/lvm.c src/lzio.c src/strbuf.c src/fpconv.c
       src/lauxlib.c src/lbaselib.c src/ldblib.c src/liolib.c src/lmathlib.c
       src/loslib.c src/ltablib.c
       src/lstrlib.c src/loadlib.c src/linit.c src/lua_cjson.c 
       src/lua_struct.c
       src/lua_cmsgpack.c
       src/lua_bit.c
       )

add_library(lua STATIC ${LUA_SRC})

在deps根目录下面添加CMakeLists.txt文件，内容如下:

add_subdirectory(hiredis)
add_subdirectory(linenoise)
add_subdirectory(lua)

在src/modules根目录下面添加CMakeLists.txt文件，内容如下:

cmake_minimum_required(VERSION 3.9)
set(CMAKE_BUILD_TYPE "Debug")
add_library(helloworld SHARED helloworld.c)
set_target_properties(helloworld PROPERTIES PREFIX "" SUFFIX ".so")


add_library(hellotype SHARED hellotype.c)
set_target_properties(hellotype PROPERTIES PREFIX "" SUFFIX ".so")


add_library(helloblock SHARED helloblock.c)
set_target_properties(helloblock PROPERTIES PREFIX "" SUFFIX ".so")


add_library(testmodule SHARED testmodule.c)
set_target_properties(testmodule PROPERTIES PREFIX "" SUFFIX ".so")

在redis

cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
project(redis VERSION 4.0)
set(CMAKE_BUILD_TYPE "Debug")

get_filename_component(REDIS_ROOT "${CMAKE_CURRENT_SOURCE_DIR}" ABSOLUTE)

add_subdirectory(deps)
add_subdirectory(src/modules)

set(SRC_SERVER_TMP
        src/adlist.c
        src/ae.c
        src/anet.c
        src/ae_kqueue.c
        src/dict.c
        src/sds.c
        src/zmalloc.c
        src/lzf_c.c
        src/lzf_d.c
        src/pqsort.c
        src/zipmap.c
        src/sha1.c
        src/ziplist.c
        src/release.c
        src/networking.c
        src/util.c
        src/object.c
        src/db.c
        src/replication.c
        src/rdb.c
        src/t_string.c
        src/t_list.c
        src/t_set.c
        src/t_zset.c
        src/evict.c
        src/defrag.c
        src/module.c
        src/quicklist.c
        src/expire.c
        src/childinfo.c
        src/redis-check-aof.c
        src/redis-check-rdb.c
        src/lazyfree.c
        src/geohash.c
        src/rax.c
        src/geohash_helper.c
        src/siphash.c
        src/geo.c
        src/t_hash.c
        src/config.c
        src/aof.c
        src/pubsub.c
        src/multi.c
        src/debug.c
        src/sort.c
        src/intset.c
        src/syncio.c
        src/cluster.c
        src/crc16.c
        src/endianconv.c
        src/slowlog.c
        src/scripting.c
        src/bio.c
        src/rio.c
        src/rand.c
        src/memtest.c
        src/crc64.c
        src/bitops.c
        src/sentinel.c
        src/notify.c
        src/setproctitle.c
        src/blocked.c
        src/hyperloglog.c
        src/latency.c
        src/sparkline.c
        src/t_stream.c
        src/lolwut.c
        src/lolwut5.c
        src/listpack.c
        src/localtime.c
        )
set(SRC_SERVER src/server.c ${SRC_SERVER_TMP})

set(SRC_CLI
        src/anet.c
        src/sds.c
        src/adlist.c
        src/redis-cli.c
        src/zmalloc.c
        src/release.c
        src/anet.c
        src/ae.c
        src/crc64.c
        )


set(EXECUTABLE_OUTPUT_PATH src)
link_directories(deps/linenoise/ deps/lua/src deps/hiredis)

add_executable(redis-server ${SRC_SERVER})
target_include_directories(redis-server
        PRIVATE ${REDIS_ROOT}/deps/linenoise
        PRIVATE ${REDIS_ROOT}/deps/hiredis
        PRIVATE ${REDIS_ROOT}/deps/lua/src)
target_link_libraries(redis-server
        PRIVATE pthread
        PRIVATE m
        PRIVATE lua
        PRIVATE linenoise
        PRIVATE hiredis)


add_executable(redis-cli ${SRC_CLI})
target_include_directories(redis-cli
        PRIVATE ${REDIS_ROOT}/deps/linenoise
        PRIVATE ${REDIS_ROOT}/deps/hiredis
        PRIVATE ${REDIS_ROOT}/deps/lua/src)

target_link_libraries(redis-cli
        PRIVATE pthread
        PRIVATE m
        PRIVATE linenoise
        PRIVATE hiredis
        )

/Users/didi/Desktop/temp/redis/src/ae_kqueue.c:41:24: error: unknown type name 'aeEventLoop'
static int aeApiCreate(aeEventLoop *eventLoop) {
                       ^
/Users/didi/Desktop/temp/redis/src/ae_kqueue.c:42:25: warning: implicit declaration of function 'zmalloc' is invalid in C99 [-Wimplicit-function-declaration]
    aeApiState *state = zmalloc(sizeof(aeApiState));
                        ^
[ 44%] Building C object CMakeFiles/redis-server.dir/src/dict.c.o
/Users/didi/Desktop/temp/redis/src/ae_kqueue.c:42:17: warning: incompatible integer to pointer conversion initializing 'aeApiState *' (aka 'struct aeApiState *') with an expression of type 'int' [-Wint-conversion]
    aeApiState *state = zmalloc(sizeof(aeApiState));
                ^       ~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/didi/Desktop/temp/redis/src/ae_kqueue.c:47:9: warning: implicit declaration of function 'zfree' is invalid in C99 [-Wimplicit-function-declaration]
        zfree(state);
        ^
/Users/didi/Desktop/temp/redis/src/ae_kqueue.c:52:9: warning: implicit declaration of function 'zfree' is invalid in C99 [-Wimplicit-function-declaration]
        zfree(state->events);
        ^
/Users/didi/Desktop/temp/redis/src/ae_kqueue.c:60:24: error: unknown type name 'aeEventLoop'

#include "ae.h"
#include "zmalloc.h"

/Users/didi/Desktop/temp/redis/src/release.c:36:10: fatal error: 'release.h' file not found
#include "release.h"
         ^~~~~~~~~~~
1 error generated.
make[3]: *** [CMakeFiles/redis-server.dir/src/release.c.o] Error 1
make[3]: *** Waiting for unfinished jobs....
[ 48%] Building C object CMakeFiles/redis-server.dir/src/networking.c.o
make[2]: *** [CMakeFiles/redis-server.dir/all] Error 2

打个断点试试，入口函数在server.c

这样就成功了

运行 redis-server

找不到release.h头文件，此时只需要切换到src目录下执行mkreleasehdr.sh脚本即可

此时重新点击运行(调试)按钮，继续报错:

这个时候只需要点击进入ae_kqueue.c文件中，添加下面两个头文件:

此时有可能会报错:

顺利的话可以看到这个界面

解决报错

原文链接：https://blog.csdn.net/qq_28163609/article/details/108146899