[Bug c++/13427] New: Incorrect address of std::string argument in constructor when passing by value

[Bug c++/13427] New: Incorrect address of std::string argument in constructor when passing by value

[davewong at syberdave dot net]

http://sourceware.org/bugzilla/show_bug.cgi?id=13427

             Bug #: 13427
           Summary: Incorrect address of std::string argument in
                    constructor when passing by value
           Product: gdb
           Version: 7.3
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned@sourceware.org
        ReportedBy: davewong@syberdave.net
    Classification: Unclassified


Created attachment 6070
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6070
Test case

When setting a breakpoint at a constructor, I cannot "print" an argument
because gdb doesn't get its address correct. See attached.

It may be useful to note that it works properly at a class method (as opposed
to the constructor).

gcc (Debian 4.5.3-1) 4.5.3
GNU gdb (GDB) 7.3-debian

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[Bug c++/13427] Incorrect address of std::string argument in constructor when passing by value

[davewong at syberdave dot net]

http://sourceware.org/bugzilla/show_bug.cgi?id=13427

Dave <davewong at syberdave dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |davewong at syberdave dot
                   |                            |net

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[Bug c++/13427] Incorrect address of std::string argument in constructor when passing by value

[phil at kantaka dot co.uk]

https://sourceware.org/bugzilla/show_bug.cgi?id=13427

Phil Armstrong <phil at kantaka dot co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |phil at kantaka dot co.uk

--- Comment #1 from Phil Armstrong <phil at kantaka dot co.uk> ---
This bug still affects gdb 7.9 - See this stack overflow thread:
http://stackoverflow.com/questions/8980566/gdb-reports-wrong-address-for-parameter-in-c-objects-constructor#comment46681158_8980566

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[Bug c++/13427] Incorrect address of std::string argument in constructor when passing by value

[phil at kantaka dot co.uk]

https://sourceware.org/bugzilla/show_bug.cgi?id=13427

--- Comment #2 from Phil Armstrong <phil at kantaka dot co.uk> ---
Addendum: clang++ -gdwarf-4 creates a binary that gdb debugs correctly, so
maybe this is a gcc bug?

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[Bug c++/13427] Incorrect address of std::string argument in constructor when passing by value

[ssbssa at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=13427

Hannes Domani <ssbssa at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ssbssa at sourceware dot org

--- Comment #3 from Hannes Domani <ssbssa at sourceware dot org> ---
(In reply to Phil Armstrong from comment #2)
> Addendum: clang++ -gdwarf-4 creates a binary that gdb debugs correctly, so
> maybe this is a gcc bug?

I can reproduce this problem when compiling with gcc up to version 8, but it
works fine for me with gcc 9, so I guess you were right that this was a gcc bug
(but I don't know which one).

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