NU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2
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GEF for linux ready, type `gef' to start, `gef config' to configure
89 commands loaded and 5 functions added for GDB 9.2 in 0.00ms using Python engine 3.8
Reading symbols from v8/out/x64.debug/d8...
warning: Could not find DWO CU obj/d8/d8.dwo(0xbad43b0798af8f6e) referenced by CU at offset 0xc0 [in module /home/user/V8/2020/v8/out/x64.debug/d8]
gef➤ r
Starting program: /home/user/V8/2020/v8/out/x64.debug/d8 --allow-natives-syntax
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff3098700 (LWP 15345)]
[New Thread 0x7ffff2897700 (LWP 15346)]
V8 version 8.5.51
d8> ^C
Thread 1 "d8" received signal SIGINT, Interrupt.
__GI___libc_read (nbytes=0x400, buf=0x555555710eb0, fd=0x0) at ../sysdeps/unix/sysv/linux/read.c:26
26 ../sysdeps/unix/sysv/linux/read.c: No such file or directory.
warning: Could not find DWO CU obj/d8/async-hooks-wrapper.dwo(0x8b18cdce576077a3) referenced by CU at offset 0x0 [in module /home/user/V8/2020/v8/out/x64.debug/d8]
warning: Could not find DWO CU obj/d8/d8-console.dwo(0x95a818df7e6b7bf3) referenced by CU at offset 0x34 [in module /home/user/V8/2020/v8/out/x64.debug/d8]
warning: Could not find DWO CU obj/d8/d8-js.dwo(0xaf722a5967a4a306) referenced by CU at offset 0x68 [in module /home/user/V8/2020/v8/out/x64.debug/d8]
warning: Could not find DWO CU obj/d8/d8-platforms.dwo(0xa3760e5b0c2de1da) referenced by CU at offset 0x8c [in module /home/user/V8/2020/v8/out/x64.debug/d8]
warning: Could not find DWO CU obj/d8/d8-posix.dwo(0xf4154270b654d114) referenced by CU at offset 0xf4 [in module /home/user/V8/2020/v8/out/x64.debug/d8]
我什至构建了多次V8，仍然出现这个问题！
以及断点触发后的警告
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
...
...
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
warning: (Internal error: pc 0x7ffff4688dd5 in read in CU, but not in symtab.)
V8 版本 8.5.51 操作系统：20.04.1 Ubuntu GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2 + GEF 扩展
我尝试解决这个问题：
tools/gdbinit 获取 V8 的
~/.gdbinit。除了定义一些有用的宏之外，它还可以帮助GDB找东西。 （我不确定这是否能解决您的问题，但这是我尝试的第一件事。）关于提出好问题的注意事项： 与其说您“使用不同的标志多次重新构建 V8”，不如列出您使用的实际标志会更有用。为任何愿意自愿贡献时间的人提供帮助您重现问题所需的一切。
还有关于 V8 版本 8.5.51 的说明：
这是 3.5 年前的一些随机快照。它很有可能包含各种错误，可能包括可调试性。任何人都不应该将其用于任何用途。它在创建后大约两个小时就变得过时且不受支持，当时 8.5.52 被同一个机器人自动标记。从你的路径名来看，我猜由于某种原因你对考古版本特别感兴趣，但你应该意识到“过时且不受支持”意味着当某些东西不起作用时，你只能靠自己了。