Re: libstdc++/7986: Problems with demangling (__cxa_demangle())

Re: libstdc++/7986: Problems with demangling (__cxa_demangle())

[bkoz]

Synopsis: Problems with demangling (__cxa_demangle())

State-Changed-From-To: analyzed->feedback
State-Changed-By: bkoz
State-Changed-When: Thu Feb 27 19:31:13 2003
State-Changed-Why:
    Fixed in mainline.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7986

Re: libstdc++/7986: Problems with demangling (__cxa_demangle())

[neroden]

Synopsis: Problems with demangling (__cxa_demangle())

State-Changed-From-To: feedback->closed
State-Changed-By: neroden
State-Changed-When: Fri Feb 28 00:13:23 2003
State-Changed-Why:
    Fixed in mainline = closed != feedback.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7986

Re: libstdc++/7986: Problems with demangling (__cxa_demangle())

[bkoz]

Synopsis: Problems with demangling (__cxa_demangle())

Responsible-Changed-From-To: unassigned->bkoz
Responsible-Changed-By: bkoz
Responsible-Changed-When: Tue Nov  5 15:42:06 2002
Responsible-Changed-Why:
    Mine.
State-Changed-From-To: open->analyzed
State-Changed-By: bkoz
State-Changed-When: Tue Nov  5 15:42:06 2002
State-Changed-Why:
    How do you find this stuff?
    
    ;)
    
    These are all confirmed bugs. There was some work done to 
    fix these problems in the demangler, but it was abandonded. At some point, this work will resume, or the current demangling code will be replaced. 
    
    -benjamin

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7986

libstdc++/7986: Problems with demangling (__cxa_demangle())

[johnb]

>Number:         7986
>Category:       libstdc++
>Synopsis:       Problems with demangling (__cxa_demangle())
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Sep 20 04:46:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     johnb@stl.sarov.ru
>Release:        gcc 3.2, gcc 3.1
>Organization:
>Environment:
Red Hat Linux 8.0beta
>Description:
I used a simple program which calls __cxa_demangle function. These mangled names were demangled wrong:
_Z1fA37_iPS_ -> f(int[37], int[37]*), should be: f(int[37], int (*) [37])
_Z1fM1AFivEPS0_ -> f(int (A::*)(), int ()()*), should be: f(int (A::*)(), int (*)())
_Z1fPFPA1_ivE -> f(int (*) [1] (*)()), should be: f(int (*(*)()) [1])
_Z1fPKM1AFivE -> f(int (A::*)() const*), should be: f(int (A::* const*)())
_Z1jM1AFivEPS1_ -> j(int (A::*)(), int (A::*)()*), should be: j(int (A::*)(), int (A::**)())
_Z1sPA37_iPS0_ -> s(int (*) [37], int (*) [37]*), should be: s(int (*) [37], int (**) [37])
_Z3fooA30_A_i -> foo(int[][30]), should be: foo(int[30][])
_Z3kooPA28_A30_i -> koo(int[30] (*) [28]), should be: koo(int (*) [28][30])
_ZlsRKU3fooU4bart1XS0_ -> operator<<(foo bart X const&, bart X), should be: operator<<(X const foo bart&, X const foo bart)

And in these cases __cxa_demangle() returned -2 (Invalid mangled name):
_Z1fM1AKFivE -> _Z1fM1AKFivE, should be: f(int (A::*)() const)
_Z3absILd1c1f1496f8a44219EEvv -> _Z3absILd1c1f1496f8a44219EEvv, should be: void abs<3.14159e-173>()
_Z3absILd40092acd9e83e426EEvv -> _Z3absILd40092acd9e83e426EEvv, should be: void abs<3.1459>()
_Z3absILe08042191a6cc56a2fe117becEEvv -> _Z3absILe08042191a6cc56a2fe117becEEvv, should be: void abs<1.234e-2345l>()
_Z3absILe804bfff8000000000000000EEvv -> _Z3absILe804bfff8000000000000000EEvv, should be: void abs<-1l>()
_Z3absILf4016147bEEvv -> _Z3absILf4016147bEEvv, should be: void abs<2.345f>()
_Z3absILfc1800000EEvv -> _Z3absILfc1800000EEvv, should be: void abs<-16f>()
>How-To-Repeat:
Feed those mangled names to __cxa_demangle() function and check the results of demangling.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: