zlmediakit 在 aarch64 编译遇到 Segmentation fault（核心已转储）

> 系统版本：openEuler 24.03 (LTS-SP1) aarch64

>  前提 
 在安装流程编译完zlmediakit 之后运行 .\MediaServer.exe -d 
 提示 Segmentation fault（核心已转储） 提示 Segmentation fault（核心已转储）

后面开始排查：
#### 1. 开启 core dump
    ulimit -c unlimited

#### 2. 查看 core 生成方式
    cat /proc/sys/kernel/core_pattern

#### 3. 前台运行看日志
    ./MediaServer

#### 4. 若有 core 文件
     gdb ./MediaServer core

#### 5. 若用 systemd-coredump
    coredumpctl list
    coredumpctl debug ./MediaServer

###交给模型分析
```shell
[root@service3 Debug]# coredumpctl debug 2601134
           PID: 2601134 (MediaServer)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 11 (SEGV)
     Timestamp: Tue 2025-12-23 09:17:45 CST (2min 34s ago)
  Command Line: ./MediaServer
    Executable: /www/spy/ZLMediaKit/release/linux/Debug/MediaServer
 Control Group: /user.slice/user-0.slice/session-18053.scope
          Unit: session-18053.scope
         Slice: user-0.slice
       Session: 18053
     Owner UID: 0 (root)
       Boot ID: 61b92c204f12426c963ee1299b6544e1
    Machine ID: 718781f979de4f48b1806e83960ef003
      Hostname: service3
       Storage: /var/lib/systemd/coredump/core.MediaServer.0.61b92c204f12426c963ee1299b6544e1.2601134.1766452665000000.lz4 (present)
  Size on Disk: 290.0K
       Message: Process 2601134 (MediaServer) of user 0 dumped core.

GNU gdb (GDB) openEuler 14.1-3.oe2403sp1
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Reading symbols from /www/spy/ZLMediaKit/release/linux/Debug/MediaServer...
[New LWP 2601134]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib64/libthread_db.so.1".
Core was generated by `./MediaServer'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  extent_arena_get (extent=0xffffffff94407000) at include/jemalloc/internal/atomic.h:55

warning: 55     include/jemalloc/internal/atomic.h: No such file or directory
Missing separate debuginfos, use: dnf debuginfo-install glibc-2.38-47.oe2403sp1.aarch64 libgcc-12.3.1-64.oe--Type <RET> for more, q to quit, c to continue without paging--
2403sp1.aarch64 libstdc++-12.3.1-64.oe2403sp1.aarch64 openssl-libs-3.0.12-15.oe2403sp1.aarch64 zlib-1.2.13-4.oe2403sp1.aarch64
(gdb) bt
#0  extent_arena_get (extent=0xffffffff94407000) at include/jemalloc/internal/atomic.h:55
#1  extent_can_coalesce (outer=0xffffffff94407000, inner=0xffff94407080, extents=<optimized out>, 
    arena=0xffff94400980) at src/extent.c:1310
#2  extent_try_coalesce (tsdn=tsdn@entry=0xffff953897b0, arena=arena@entry=0xffff94400980, 
    r_extent_hooks=r_extent_hooks@entry=0xffffe074dc08, rtree_ctx=rtree_ctx@entry=0xffff953897d0, 
    extents=extents@entry=0xffff944033c8, extent=extent@entry=0xffff94407080, 
    coalesced=coalesced@entry=0x0, growing_retained=<optimized out>) at src/extent.c:1401
#3  0x0000ffff9511238c in extent_record (tsdn=tsdn@entry=0xffff953897b0, 
    arena=arena@entry=0xffff94400980, r_extent_hooks=r_extent_hooks@entry=0xffffe074dc08, 
    extents=extents@entry=0xffff944033c8, extent=0xffff94407080, growing_retained=true)
    at src/extent.c:1448
#4  0x0000ffff95112b5c in extent_grow_retained (tsdn=tsdn@entry=0xffff953897b0, 
    arena=arena@entry=0xffff94400980, r_extent_hooks=r_extent_hooks@entry=0xffffe074dc08, 
    size=size@entry=28672, pad=pad@entry=4096, alignment=alignment@entry=64, slab=slab@entry=false, 
    szind=szind@entry=39, zero=zero@entry=0xffffe074dc6f, commit=commit@entry=0xffffe074dc07)
    at src/extent.c:1145
#5  0x0000ffff9511412c in extent_alloc_retained (commit=0xffffe074dc07, zero=0xffffe074dc6f, szind=39, 
    slab=false, alignment=64, pad=4096, size=28672, new_addr=0x0, r_extent_hooks=0xffffe074dc08, 
    arena=0xffff94400980, tsdn=0xffff953897b0) at src/extent.c:1238
#6  je_extent_alloc_wrapper (tsdn=tsdn@entry=0xffff953897b0, arena=arena@entry=0xffff94400980, 
    r_extent_hooks=r_extent_hooks@entry=0xffffe074dc08, new_addr=new_addr@entry=0x0, 
    size=size@entry=28672, pad=pad@entry=4096, alignment=alignment@entry=64, slab=slab@entry=false, 
    szind=szind@entry=39, zero=zero@entry=0xffffe074dc6f, commit=commit@entry=0xffffe074dc07)
--Type <RET> for more, q to quit, c to continue without paging--
    at src/extent.c:1296
#7  0x0000ffff950f2758 in je_arena_extent_alloc_large (tsdn=tsdn@entry=0xffff953897b0, 
    arena=arena@entry=0xffff94400980, usize=usize@entry=28672, alignment=64, 
    zero=zero@entry=0xffffe074dc6f) at src/arena.c:527
#8  0x0000ffff95115d04 in je_large_palloc (tsdn=0xffff953897b0, arena=<optimized out>, usize=28672, 
    alignment=<optimized out>, zero=<optimized out>) at src/large.c:47
#9  0x0000ffff95124788 in ipallocztm (arena=<optimized out>, is_internal=true, tcache=0x0, zero=true, 
    alignment=64, usize=<optimized out>, tsdn=0xffff953897b0)
    at include/jemalloc/internal/jemalloc_internal_inlines_c.h:58
#10 je_tsd_tcache_data_init (tsd=tsd@entry=0xffff953897b0) at src/tcache.c:388
#11 0x0000ffff95124ee0 in je_tsd_tcache_enabled_data_init (tsd=tsd@entry=0xffff953897b0)
    at src/tcache.c:339
#12 0x0000ffff95125e5c in tsd_data_init (tsd=0xffff953897b0) at src/tsd.c:74
#13 je_tsd_fetch_slow (tsd=0xffff953897b0, minimal=<optimized out>) at src/tsd.c:121
#14 0x0000ffff95125fb0 in tsd_fetch_impl (minimal=false, init=true) at include/jemalloc/internal/tsd.h:263
#15 tsd_fetch () at include/jemalloc/internal/tsd.h:289
#16 je_malloc_tsd_boot0 () at src/tsd.c:256
#17 0x0000ffff950e8180 in malloc_init_hard () at src/jemalloc.c:1469
#18 0x0000ffff950e9740 in malloc_init () at src/jemalloc.c:216
#19 imalloc (dopts=<synthetic pointer>, sopts=<synthetic pointer>) at src/jemalloc.c:1927
#20 malloc (size=72704) at src/jemalloc.c:1977
#21 0x0000ffff94a5ea08 in ?? () from /usr/lib64/libstdc++.so.6
#22 0x0000ffff9536a65c in ?? () from /lib/ld-linux-aarch64.so.1
--Type <RET> for more, q to quit, c to continue without paging--info registers
#23 0x0000ffff9536a754 in ?? () from /lib/ld-linux-aarch64.so.1
#24 0x0000ffff9537f4b8 in ?? () from /lib/ld-linux-aarch64.so.1
(gdb) info registers
x0             0xffffffff94407000  -1807716352
x1             0x0                 0
x2             0x0                 0
x3             0x20d565b2bf87ea62  2365908997645003362
x4             0xffff95389760      281473185257312
x5             0x1490              5264
x6             0xea46c429a730de46  -1565348137286967738
x7             0x1377330e14c12fe2  1402645944519962594
x8             0x20d565b2afed58bb  2365908997383215291
x9             0x178               376
x10            0xffbb60f9eee728a1  -19315146821785439
x11            0xea46c429d213bc52  -1565348136567456686
x12            0xffbb60f9913a98dd  -19315148393375523
x13            0x0                 0
x14            0x0                 0
x15            0x1                 1
x16            0x1                 1
x17            0x27ffff94407000    11258997260709888
x18            0x465bceb23a17cff9  5069873070409764857
x19            0xffff94407080      281473168994432
x20            0xffff944033c8      281473168978888
x21            0xffff953897b0      281473185257392
x22            0x0                 0
--Type <RET> for more, q to quit, c to continue without paging--
x23            0xc4ceb9fe1a85ec53  -4265267296055464877
x24            0xff51afd7ed558ccd  -49064778989728563
x25            0xffff953897d0      281473185257424
x26            0xffff94400980      281473168968064
x27            0xffffffff94407000  -1807716352
x28            0xffff95150500      281473182926080
x29            0xffffe074d640      281474447496768
x30            0xffff95111ef8      281473182670584
sp             0xffffe074d640      0xffffe074d640
pc             0xffff95111f00      0xffff95111f00 <extent_try_coalesce+352>
cpsr           0x60001000          [ EL=0 BTYPE=0 SSBS C Z ]
fpsr           0x0                 [ ]
fpcr           0x0                 [ Len=0 Stride=0 RMode=0 ]
tpidr          0xffff95389760      0xffff95389760
tpidr2         0x0                 0x0
(gdb) 
```

### 初步判断是：
 
> ZLMediaKit 静态链接了 jemalloc，但与 openEuler 24.03 的 glibc 或内核存在兼容性问题
ZLMediaKit 默认会 内置编译并链接自己的 jemalloc（位于 3rdpart/jemalloc 子模块）
而 openEuler 24.03 使用较新的 glibc 2.38 + 内核 6.x，对内存布局、ASLR、指针加密（PAC）等有更严格要求
旧版 jemalloc（尤其是 ZLMediaKit 自带的版本）在 aarch64 + 新系统上可能因指针对齐、原子操作或虚拟地址假设错误而崩溃

#### 解决方法：
> 修改 CMakeLists.txt 强制跳过 jemalloc
编辑 /ZLMediaKit/CMakeLists.txt，找到类似这段代码

```shell
find_library(JEMALLOC_LIBRARIES NAMES jemalloc)
if(JEMALLOC_LIBRARIES)
    message(STATUS "found library: ${JEMALLOC_LIBRARIES}")
    message(STATUS "jemalloc will be used to avoid memory fragmentation")
    target_link_libraries(${PROJECT_NAME} PRIVATE ${JEMALLOC_LIBRARIES})
endif()
```

#### 注释掉或删除整个 if(JEMALLOC_LIBRARIES) 块：

```shell
# find_library(JEMALLOC_LIBRARIES NAMES jemalloc)
# if(JEMALLOC_LIBRARIES)
#     message(STATUS "found library: ${JEMALLOC_LIBRARIES}")
#     message(STATUS "jemalloc will be used to avoid memory fragmentation")
#     target_link_libraries(${PROJECT_NAME} PRIVATE ${JEMALLOC_LIBRARIES})
# endif()
```

#### 然后重新 cmake + make。

重新编译之后可正常运行。

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