89 lines
3.3 KiB
Text
89 lines
3.3 KiB
Text
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Known problems in GDB 6.1
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See also: http://www.gnu.org/software/gdb/bugs/
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*** Misc
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gdb/1560: Control-C does not always interrupt GDB.
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When GDB is busy processing a command which takes a long time to
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complete, hitting Control-C does not have the expected effect.
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The command execution is not aborted, and the "QUIT" message confirming
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the abortion is displayed only after the command has been completed.
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*** C++ support
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gdb/826: variables in C++ namespaces have to be enclosed in quotes
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When referring to a variable in C++ code that is inside a
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namespace, you have to put it inside single quotes.
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gdb/931: GDB could be more generous when reading types C++ templates on input
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When the user types a template, GDB frequently requires the type to be
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typed in a certain way (e.g. "const char*" as opposed to "const char *"
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or "char const *" or "char const*").
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gdb/1512: no canonical way to output names of C++ types
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We currently don't have any canonical way to output names of C++ types.
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E.g. "const char *" versus "char const *"; more subtleties arise when
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dealing with templates.
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gdb/1516: [regression] local classes, gcc 2.95.3, dwarf-2
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With gcc 2.95.3 and the dwarf-2 debugging format, classes which are
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defined locally to a function include the demangled name of the function
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as part of their name. For example, if a function "foobar" contains a
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local class definition "Local", gdb will say that the name of the class
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type is "foobar__Fi.0:Local".
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This applies only to classes where the class type is defined inside a
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function, not to variables defined with types that are defined somewhere
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outside any function (which most types are).
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gdb/1091: Constructor breakpoints ignored
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gdb/1193: g++ 3.3 creates multiple constructors: gdb 5.3 can't set breakpoints
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When gcc 3.x compiles a C++ constructor or C++ destructor, it generates
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2 or 3 different versions of the object code. These versions have
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unique mangled names (they have to, in order for linking to work), but
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they have identical source code names, which leads to a great deal of
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confusion. Specifically, if you set a breakpoint in a constructor or a
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destructor, gdb will put a breakpoint in one of the versions, but your
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program may execute the other version. This makes it impossible to set
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breakpoints reliably in constructors or destructors.
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gcc 3.x generates these multiple object code functions in order to
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implement virtual base classes. gcc 2.x generated just one object code
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function with a hidden parameter, but gcc 3.x conforms to a multi-vendor
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ABI for C++ which requires multiple object code functions.
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*** Stack backtraces
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gdb/1505: [regression] gdb prints a bad backtrace for a thread
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When backtracing a thread, gdb doesn't stop until it hits garbage.
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This is sensitive to the operating system and thread library.
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mips*-*-*
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powerpc*-*-*
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sparc*-*-*
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GDB's SPARC, MIPS and PowerPC targets, in 6.0, have not been updated
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to use the new frame mechanism.
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People encountering problems with these targets should consult GDB's
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web pages and mailing lists (http://www.gnu.org/software/gdb/) to see
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if there is an update.
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arm-*-*
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GDB's ARM target, in 6.0, has not been updated to use the new frame
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mechanism.
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Fortunately the ARM target, in the GDB's mainline sources, has been
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updated so people encountering problems should consider downloading a
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more current GDB (http://www.gnu.org/software/gdb/current).
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