Trying to format a gdb.Value instead of an integer

[erikcw]

root@ip-172-30-5-125:/opt/openresty/nginx/conf/openresty-gdb-utils# gdb /usr/local/openresty/nginx/sbin/nginx 1627
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Reading symbols from /usr/local/openresty/nginx/sbin/nginx...Reading symbols from /usr/lib/debug/.build-id/b5/26715423f8887c0f43fee5f6f92ad9de516f34.debug...d
one.
done.
Attaching to program: /usr/local/openresty/nginx/sbin/nginx, process 1627
Reading symbols from /lib/x86_64-linux-gnu/libdl.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libdl-2.23.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libpthread.so.0...Reading symbols from /usr/lib/debug/.build-id/ce/17e023542265fc11d9bc8f534bb4f070493d30.debug...d
one.
done.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Reading symbols from /lib/x86_64-linux-gnu/libcrypt.so.1...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libcrypt-2.23.so...done.
done.
Reading symbols from /usr/local/openresty/luajit/lib/libluajit-5.1.so.2...Reading symbols from /usr/lib/debug/.build-id/e1/a0df4f3cc077937317d3ec0db79f2811d97
bff.debug...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libm.so.6...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libm-2.23.so...done.
done.
Reading symbols from /usr/local/openresty/pcre/lib/libpcre.so.1...(no debugging symbols found)...done.
Reading symbols from /usr/local/openresty/openssl/lib/libssl.so.1.0.0...(no debugging symbols found)...done.
Reading symbols from /usr/local/openresty/openssl/lib/libcrypto.so.1.0.0...(no debugging symbols found)...done.
Reading symbols from /usr/local/openresty/zlib/lib/libz.so.1...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libc-2.23.so...done.
done.
Reading symbols from /lib64/ld-linux-x86-64.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/ld-2.23.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libgcc_s.so.1...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libnss_files.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_files-2.23.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libnss_dns.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_dns-2.23.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libresolv.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libresolv-2.23.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libnss_compat.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_compat-2.23.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libnsl.so.1...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnsl-2.23.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libnss_nis.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_nis-2.23.so...done.
done.
Reading symbols from /usr/local/lib/lua/5.1/lpeg.so...(no debugging symbols found)...done.
Reading symbols from /usr/local/lib/lua/5.1/socket/core.so...(no debugging symbols found)...done.
Reading symbols from /usr/local/openresty/lualib/cjson.so...Reading symbols from /usr/lib/debug/.build-id/17/db0c5d68ca313173ac7e4a323550c7ca9af932.debug...d$ne.
done.
Reading symbols from /usr/local/lib/lua/5.1/crypto.so...(no debugging symbols found)...done.
0x00007f675858f9f3 in __epoll_wait_nocancel () at ../sysdeps/unix/syscall-template.S:84
84      ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) source luajit21.py
(gdb) lgcpath 100000 tab
path 000:[registry] ->Tab["tcp{client}"] ->Tab["__index"] ->Tab["send"] ->cfunc ->env ->Tab["loaded"] ->Tab["lapis"] ->Tab["app_cache"] ->Tab Traceback (most recent call last):
  File "luajit21.py", line 2720, in invoke
    self.visit_tval(g['registrytv'], g)
  File "luajit21.py", line 2977, in visit_tval
    self.dfs(gcval(tv), g)
  File "luajit21.py", line 2958, in dfs
    self.visit_tab(obj['tab'].address, g)
  File "luajit21.py", line 3047, in visit_tab
    self.dfs(gcval(tv), g)
  File "luajit21.py", line 2958, in dfs
    self.visit_tab(obj['tab'].address, g)
  File "luajit21.py", line 3047, in visit_tab
    self.dfs(gcval(tv), g)
  File "luajit21.py", line 2958, in dfs
    self.visit_tab(obj['tab'].address, g)
  File "luajit21.py", line 3047, in visit_tab
    self.dfs(gcval(tv), g)
  File "luajit21.py", line 2960, in dfs
    self.visit_func(obj['fn'].address, g)
  File "luajit21.py", line 3070, in visit_func
    self.dfs(tabref(fn['c']['env']), g)
  File "luajit21.py", line 2958, in dfs
    self.visit_tab(obj['tab'].address, g)
  File "luajit21.py", line 3047, in visit_tab
    self.dfs(gcval(tv), g)
  File "luajit21.py", line 2958, in dfs
    self.visit_tab(obj['tab'].address, g)
  File "luajit21.py", line 3047, in visit_tab
    self.dfs(gcval(tv), g)
  File "luajit21.py", line 2958, in dfs
    self.visit_tab(obj['tab'].address, g)
  File "luajit21.py", line 3047, in visit_tab
    self.dfs(gcval(tv), g)
  File "luajit21.py", line 2952, in dfs
    self.print_obj_path(g)
  File "luajit21.py", line 2918, in print_obj_path
    out("sz:%d (GCobj*)%#x ->END\n" % (sz, gco))
TypeError: %x format: an integer is required, not gdb.Value

Error occurred in Python command: %x format: an integer is required, not gdb.Value

[spacewander]

@erikcw Just provide a quick fix for the issue. Could you try it out?

[erikcw]

@spacewander Seems to fix the issue:

(gdb) lgcpath 100000 tab
path 000:[registry] ->Tab["tcp{client}"] ->Tab["__index"] ->Tab["send"] ->cfunc ->env ->Tab["loaded"] ->Tab["lapis"] ->Tab["app_cache"] ->Tab sz:786464 (GCobj*)0x41415e18 ->END

Thanks!