redis 源码 编译

2020-08-07

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

  1. 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

  2. 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

  3. 添加 CMakeLists.txt

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

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

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

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      add_library(linenoise linenoise.c)

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

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      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})

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

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

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

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      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")

    6. 在redis

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      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
              )

解决报错

顺利的话可以看到这个界面

image-20200807181004333

此时有可能会报错:

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/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'

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:

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

此时重新点击运行(调试)按钮，继续报错:

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/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

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

运行 redis-server

image-20200807181132188

这样就成功了

打个断点试试，入口函数在server.c

image-20200807181219576

👌

Tags: redis 源码
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