2 Known problems in GDB 6.3
4 See also: http://www.gnu.org/software/gdb/bugs/
9 build/1411: build fails on hpux 10.20 and hpux 11.00 with CMA threads
11 GDB does not build on HP/UX 10.20 or HP/UX 11.00 if the CMA
12 thread package is installed. The compile error is:
14 ../../gdb/hpux-thread.c:222: variable-size type declared outside of any function
16 This happens only if the CMA thread package is installed.
18 As a workaround, you can disable support for CMA threads
19 by editing the file gdb/configure. Find the line:
21 if test -f /usr/include/dce/cma_config.h ; then
29 gdb/1560: Control-C does not always interrupt GDB.
31 When GDB is busy processing a command which takes a long time to
32 complete, hitting Control-C does not have the expected effect.
33 The command execution is not aborted, and the "QUIT" message confirming
34 the abortion is displayed only after the command has been completed.
38 gdb/931: GDB could be more generous when reading types C++ templates on input
40 When the user types a template, GDB frequently requires the type to be
41 typed in a certain way (e.g. "const char*" as opposed to "const char *"
42 or "char const *" or "char const*").
44 gdb/1512: no canonical way to output names of C++ types
46 We currently don't have any canonical way to output names of C++ types.
47 E.g. "const char *" versus "char const *"; more subtleties arise when
48 dealing with templates.
50 gdb/1516: [regression] local classes, gcc 2.95.3, dwarf-2
52 With gcc 2.95.3 and the dwarf-2 debugging format, classes which are
53 defined locally to a function include the demangled name of the function
54 as part of their name. For example, if a function "foobar" contains a
55 local class definition "Local", gdb will say that the name of the class
56 type is "foobar__Fi.0:Local".
58 This applies only to classes where the class type is defined inside a
59 function, not to variables defined with types that are defined somewhere
60 outside any function (which most types are).
62 gdb/1588: names of c++ nested types in casts must be enclosed in quotes
65 (gdb) print ('Foo::Bar') x
67 (gdb) print ('Foo::Bar' *) y
69 (gdb) print (Foo::Bar) x
71 (gdb) print (Foo::Bar *) y
74 gdb/1091: Constructor breakpoints ignored
75 gdb/1193: g++ 3.3 creates multiple constructors: gdb 5.3 can't set breakpoints
77 When gcc 3.x compiles a C++ constructor or C++ destructor, it generates
78 2 or 3 different versions of the object code. These versions have
79 unique mangled names (they have to, in order for linking to work), but
80 they have identical source code names, which leads to a great deal of
81 confusion. Specifically, if you set a breakpoint in a constructor or a
82 destructor, gdb will put a breakpoint in one of the versions, but your
83 program may execute the other version. This makes it impossible to set
84 breakpoints reliably in constructors or destructors.
86 gcc 3.x generates these multiple object code functions in order to
87 implement virtual base classes. gcc 2.x generated just one object code
88 function with a hidden parameter, but gcc 3.x conforms to a multi-vendor
89 ABI for C++ which requires multiple object code functions.
93 threads/1650: manythreads.exp
95 On GNU/Linux systems that use the old LinuxThreads thread library, a
96 program rapidly creating and deleting threads can confuse GDB leading
99 This problem does not occur on newer systems that use the NPTL
100 library, and did not occur with GDB 6.1.