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p 'CV::m(int)' vs p CV::m(int)
- From: Yao Qi <qiyaoltc at gmail dot com>
- To: GDB <gdb at sourceware dot org>
- Date: Fri, 15 Jul 2016 14:49:01 +0100
- Subject: p 'CV::m(int)' vs p CV::m(int)
- Authentication-results: sourceware.org; auth=none
Hi,
I just notice that p 'CV::m(int)' is different p CV::m(int), (with and
without single quote). Where do we document p 'CV::m(int)'? I see
https://sourceware.org/gdb/onlinedocs/gdb/Variables.html
but it is about using single quote before "::". However, the usage
like 'CV::m(int)' isn't documented there.
‘scope1::scope2::name’ is mentioned in
https://sourceware.org/gdb/onlinedocs/gdb/C-Plus-Plus-Expressions.html,
but it is about ::, not about the single quote usage.
I set debug expression 1, and it shows me more,
(gdb) p 'CV::m(int)'
Dump of expression @ 0x60b00005cd40, before conversion to prefix form:
Language c++, 4 elements, 16 bytes each.
Index Opcode Hex Value String Value
0 OP_VAR_VALUE 40 (...............
1 <unknown 4164576> 107820863163360 ..?..b..........
2 <unknown 3897520> 107820862896304 .x;..b..........
3 OP_VAR_VALUE 40 (...............
Dump of expression @ 0x60b00005cd40, after conversion to prefix form:
Expression: `CV::m(int)'
Language c++, 4 elements, 16 bytes each.
0 OP_VAR_VALUE Block @0x6210003f8be0, symbol
@0x6210003b78b0 (CV::m(int))
(gdb) p CV::m(int)
Dump of expression @ 0x6110002177c0, before conversion to prefix form:
Language c++, 11 elements, 16 bytes each.
Index Opcode Hex Value String Value
0 OP_SCOPE 86 V...............
1 <unknown 3743424> 107820862742208 ..9..b..........
2 BINOP_ADD 1 ................
3 <unknown -1094844307> -4702111234475032467 m...............
4 BINOP_ADD 1 ................
5 OP_SCOPE 86 V...............
6 TYPE_INSTANCE 29 ................
7 BINOP_ADD 1 ................
8 <unknown 4384096> 107820863382880 `.B..b..........
9 BINOP_ADD 1 ................
10 TYPE_INSTANCE 29 ................
Dump of expression @ 0x6110002177c0, after conversion to prefix form:
Expression: `TypesInstance(int,CV::m)'
Language c++, 11 elements, 16 bytes each.
0 TYPE_INSTANCE 1 TypeInstance: Type @0x62100042e560 (int)
5 OP_SCOPE Type @0x621000391ec0 (CV) Field name: `m'
--
Yao (齐尧)