On 4/12/11 6:47 PM, Martin Nowak wrote:
On Sun, 04 Dec 2011 14:40:47 +0100, Peter Alexander
<peter.alexander...@gmail.com> wrote:
DMD outputs quite a few symbols that end with a Z. For example:
module test;
class Foo {}
Gives me these three symbols (all .data)
00013680 D _D4test4Foo16__initZ
000136e0 D _D4test4Foo16__vtblZ
00013690 D _D4test4Foo17__ClassZ
I have two questions:
1. I know what __init and __vtbl are, but what is __Class?
The typeinfo for a specific class, i.e. test.Foo.classinfo which
is an instance of TypeInfo_Class.
2. What does the Z at the end mean? The D ABI page doesn't describe
this in its grammar, and indeed std.demangle is unable to demangle
these symbols. It expects a type there, and Z represents no type.
It is used for additional compiler symbols.
Z is used as terminal element for templates and non-variadic function
arguments.
You may have a look at dmd/src/tocsym.c to find the ones being used for
compiler symbols.
Once I know this, I will fix std.demangle so that it can parse these.
Makes sense.
Next question, what should they demangle to? :-)
_D4test3Foo6__initZ
1. test.Foo.init
2. test.Foo.__init
3. byte[] test.Foo.init
4. byte[] test.Foo.__init
_D4test3Foo6__vtblZ
1. test.Foo.vtbl
2. test.Foo.__vtbl
3. void*[] test.Foo.vtbl
4. void*[] test.Foo.__vtbl
_D4test3Foo7__ClassZ
1. test.Foo.classinfo
2. test.Foo.__Class
3. object.TypeInfo_Class test.Foo.classinfo
4. object.TypeInfo_Class test.Foo.__Class
?
I would say it should be the third one for all of them. Anyone else want
to weigh in on this?
