| If you find inaccuracies in this list, please send mail to |
| bug-gdb@prep.ai.mit.edu. If you would like to work on any of these, |
| you should consider sending mail to the same address, to find out |
| whether anyone else is working on it. |
| |
| General To Do List |
| ------------------ |
| |
| This list is probably not up to date, and opinions vary about the |
| importance or even desirability of some of the items. |
| |
| Document trace machinery. |
| |
| Document overlay machinery. |
| |
| Extend .gdbinit mechanism to specify name on command line, allow for |
| lists of files to load, include function of --tclcommand. |
| |
| @c This does not work (yet if ever). FIXME. |
| @c @item --parse=@var{lang} @dots{} |
| @c Configure the @value{GDBN} expression parser to parse the listed languages. |
| @c @samp{all} configures @value{GDBN} for all supported languages. To get a |
| @c list of all supported languages, omit the argument. Without this |
| @c option, @value{GDBN} is configured to parse all supported languages. |
| |
| Add an "info bfd" command that displays supported object formats, |
| similarly to objdump -i. |
| |
| START_INFERIOR_TRAPS_EXPECTED need never be defined to 2, since that |
| is its default value. Clean this up. |
| |
| It should be possible to use symbols from shared libraries before we know |
| exactly where the libraries will be loaded. E.g. "b perror" before running |
| the program. This could maybe be done as an extension of the "breakpoint |
| re-evaluation" after new symbols are loaded. |
| |
| Make single_step() insert and remove breakpoints in one operation. |
| |
| Speed up single stepping by avoiding extraneous ptrace calls. |
| |
| Speed up single stepping by not inserting and removing breakpoints |
| each time the inferior starts and stops. |
| |
| Breakpoints should not be inserted and deleted all the time. Only the |
| one(s) there should be removed when we have to step over one. Support |
| breakpoints that don't have to be removed to step over them. |
| |
| Update gdbint.texinfo to include doc on the directory structure and |
| the various tricks of building gdb. |
| |
| Do a tutorial in gdb.texinfo on how to do simple things in gdb. |
| E.g. how to set a breakpoint that just prints something and continues. |
| How to break on aborts. Etc. |
| |
| Provide "voodoo" debugging of core files. This creates a zombie |
| process as a child of the debugger, and loads it up with the data, |
| stack, and regs of the core file. This allows you to call functions |
| in the executable, to manipulate the data in the core file. |
| |
| GDB reopens the source file on every line, as you "next" through it. |
| |
| Referencing the vtbl member of a struct doesn't work. It prints OK |
| if you print the struct, but it gets 0 if you try to deref it. |
| |
| Persistent command history: A feature where you could save off a list |
| of the commands you did, so you can edit it into something that will bring |
| the target to the same place every time you source it. |
| This would also be useful for automated fast watchpointing; if you go |
| past the place where it watchpoints, you just start it over again and |
| do it more carefully. |
| |
| Deal with the SunOS 4.0 and 4.1.1 ptrace bug that loses the registers if |
| the stack is paged out. |
| |
| Finish the C++ exception handling stub routines. Lint points them out |
| as unused statics functions. |
| |
| Perhaps "i source" should take an argument like that of "list". |
| |
| See if core-aout.c's fetch_core_registers can be used on more machines. |
| E.g. MIPS (mips-xdep.c). |
| |
| unpack_double() does not handle IEEE float on the target unless the host |
| is also IEEE. Death on a vax. |
| |
| Set up interface between GDB and INFO so that you can hop into interactive |
| INFO and back out again. When running under Emacs, should use Emacs |
| info, else fork the info program. Installation of GDB should install |
| its texinfo files into the info tree automagically, including the readline |
| texinfo files. |
| |
| "help address" ought to find the "help set print address" entry. |
| |
| Remove the VTBL internal guts from printouts of C++ structs, unless |
| vtblprint is set. |
| |
| Remove "at 0xnnnn" from the "b foo" response, if `print address off' and if |
| it matches the source line indicated. |
| |
| The prompt at end of screen should accept space as well as CR. |
| |
| Check STORE_RETURN_VALUE on all architectures. Check near it in tm-sparc.h |
| for other bogosities. |
| |
| Check for storage leaks in GDB, I'm sure there are a lot! |
| |
| vtblprint of a vtbl should demangle the names it's printing. |
| |
| Backtrace should point out what the currently selected frame is, in |
| its display, perhaps showing "@3 foo (bar, ...)" or ">3 foo (bar, |
| ...)" rather than "#3 foo (bar, ...)". |
| |
| "i program" should work for core files, and display more info, like what |
| actually caused it to die. |
| |
| "x/10i" should shorten the long name, if any, on subsequent lines. |
| |
| Check through the code for FIXME comments and fix them. dbxread.c, |
| blockframe.c, and plenty more. (I count 634 as of 940621 - sts) |
| |
| "next" over a function that longjumps, never stops until next time you happen |
| to get to that spot by accident. E.g. "n" over execute_command which has |
| an error. |
| |
| "set zeroprint off", don't bother printing members of structs which |
| are entirely zero. Useful for those big structs with few useful |
| members. |
| |
| GDB does four ioctl's for every command, probably switching terminal modes |
| to/from inferior or for readline or something. |
| |
| terminal_ours versus terminal_inferior: cache state. Switch should be a noop |
| if the state is the same, too. |
| |
| ptype $i6 = void??! |
| |
| Clean up invalid_float handling so gdb doesn't coredump when it tries to |
| access a NaN. While this might work on SPARC, other machines are not |
| configured right. |
| |
| "b value_at ; commands ; continue ; end" stops EVERY OTHER TIME! |
| Then once you enter a command, it does the command, runs two more |
| times, and then stops again! Bizarre... (This behaviour has been |
| modified, but it is not yet 100% predictable when e.g. the commands |
| call functions in the child, and while there, the child is interrupted |
| with a signal, or hits a breakpoint.) |
| |
| help completion, help history should work. |
| |
| Check that we can handle stack trace through varargs AND alloca in same |
| function, on 29K. |
| |
| wait_for_inferior loops forever if wait() gives it an error. |
| |
| "i frame" shows wrong "arglist at" location, doesn't show where the args |
| should be found, only their actual values. |
| |
| There should be a way for "set" commands to validate the new setting |
| before it takes effect. |
| |
| A mess of floating point opcodes are missing from sparc-opcode.h. |
| Also, a little program should test the table for bits that are |
| overspecified or underspecified. E.g. if the must-be-ones bits |
| and the must-be-zeroes bits leave some fields unexamined, and the format |
| string leaves them unprinted, then point this out. If multiple |
| non-alias patterns match, point this out too. Finally, there should |
| be a sparc-optest.s file that tries each pattern out. This file |
| should end up coming back the same (modulo transformation comments) |
| if fed to "gas" then the .o is fed to gdb for disassembly. |
| |
| Eliminate all the core_file_command's in all the xdep files. |
| Eliminate separate declarations of registers[] everywhere. |
| |
| "ena d" is ambiguous, why? "ena delete" seems to think it is a command! |
| |
| Perhaps move the tdep, xdep, and nat files, into the config |
| subdirectories. If not, at least straighten out their names so that |
| they all start with the machine name. |
| |
| inferior_status should include stop_print_frame. It won't need to be |
| reset in wait_for_inferior after bpstat_stop_status call, then. |
| |
| i line VAR produces "Line number not known for symbol ``var''.". I |
| thought we were stashing that info now! |
| |
| We should be able to write to random files at hex offsets like adb. |
| |
| Make "target xxx" command interruptible. |
| |
| Handle add_file with separate text, data, and bss addresses. Maybe |
| handle separate addresses for each segment in the object file? |
| |
| Handle free_named_symtab to cope with multiply-loaded object files |
| in a dynamic linking environment. Should remember the last copy loaded, |
| but not get too snowed if it finds references to the older copy. |
| |
| Generalize and Standardize the RPC interface to a target program, |
| improve it beyond the "ptrace" interface, and see if it can become a |
| standard for remote debugging. (This is talking about the vxworks |
| interface. Seems unlikely to me that there will be "a standard" for |
| remote debugging anytime soon --kingdon, 8 Nov 1994). |
| |
| Remove all references to: |
| text_offset |
| data_offset |
| text_data_start |
| text_end |
| exec_data_offset |
| ... |
| now that we have BFD. All remaining are in machine dependent files. |
| |
| When quitting with a running program, if a core file was previously |
| examined, you get "Couldn't read float regs from core file"...if |
| indeed it can't. generic_mourn_inferior... |
| |
| Have remote targets give a warning on a signal argument to |
| target_resume. Or better yet, extend the protocols so that it works |
| like it does on the Unix-like systems. |
| |
| Sort help and info output. |
| |
| Re-organize help categories into things that tend to fit on a screen |
| and hang together. |
| |
| renote-nindy.c handles interrupts poorly; it error()s out of badly |
| chosen places, e.g. leaving current_frame zero, which causes core dumps |
| on the next command. |
| |
| Add in commands like ADB's for searching for patterns, etc. We should |
| be able to examine and patch raw unsymboled binaries as well in gdb as |
| we can in adb. (E.g. increase the timeout in /bin/login without source). |
| |
| Those xdep files that call register_addr without defining it are |
| probably simply broken. When reconfiguring this part of gdb, I could |
| only make guesses about how to redo some of those files, and I |
| probably guessed wrong, or left them "for later" when I have a |
| machine that can attempt to build them. |
| |
| When doing "step" or "next", if a few lines of source are skipped between |
| the previous line and the current one, print those lines, not just the |
| last line of a multiline statement. |
| |
| When searching for C++ superclasses in value_cast in valops.c, we must |
| not search the "fields", only the "superclasses". There might be a |
| struct with a field name that matches the superclass name. This can |
| happen when the struct was defined before the superclass (before the |
| name became a typedef). |
| |
| Handling of "&" address-of operator needs some serious overhaul |
| for ANSI C and consistency on arrays and functions. |
| For "float point[15];": |
| ptype &point[4] ==> Attempt to take address of non-lvalue. |
| For "char *malloc();": |
| ptype malloc ==> "char *()"; should be same as |
| ptype &malloc ==> "char *(*)()" |
| call printf ("%x\n", malloc) ==> weird value, should be same as |
| call printf ("%x\n", &malloc) ==> correct value |
| |
| Fix dbxread.c symbol reading in the presence of interrupts. It |
| currently leaves a cleanup to blow away the entire symbol table when a |
| QUIT occurs. (What's wrong with that? -kingdon, 28 Oct 1993). |
| |
| Mipsread.c reads include files depth-first, because the dependencies |
| in the psymtabs are way too inclusive (it seems to me). Figure out what |
| really depends on what, to avoid recursing 20 or 30 times while reading |
| real symtabs. |
| |
| value_add() should be subtracting the lower bound of arrays, if known, |
| and possibly checking against the upper bound for error reporting. |
| |
| mipsread.c symbol table allocation and deallocation should be checked. |
| My suspicion is that it's full of memory leaks. |
| |
| SunOS should have a target_lookup_symbol() for common'd things allocated |
| by the shared library linker ld.so. |
| |
| When listing source lines, check for a preceding \n, to verify that |
| the file hasn't changed out from under us. |
| |
| When listing source lines, eat leading whitespace corresponding to the |
| line-number prefix we print. This avoids long lines wrapping. |
| |
| mipsread.c needs to check for old symtabs and psymtabs for the same |
| files, the way it happens for dbxread.c and coffread.c, for VxWorks |
| incremental symbol table reloading. |
| |
| Get all the remote systems (where the protocol allows it) to be able to |
| stop the remote system when the GDB user types ^C (like remote.c |
| does). For ebmon, use ^Ak. |
| |
| Possible feature: A version of the "disassemble" command which shows |
| both source and assembly code ("set symbol-filename on" is a partial |
| solution). |
| |
| investigate "x/s 0" (right now stops early) (I think maybe GDB is |
| using a 0 address for bad purposes internally). |
| |
| Make "info path" and path_command work again (but independent of the |
| environment either of gdb or that we'll pass to the inferior). |
| |
| Make GDB understand the GCC feature for putting octal constants in |
| enums. Make it so overflow on an enum constant does not error_type |
| the whole type. Allow arbitrarily large enums with type attributes. |
| Put all this stuff in the testsuite. |
| |
| Make TYPE_CODE_ERROR with a non-zero TYPE_LENGTH more useful (print |
| the value in hex; process type attributes). Add this to the |
| testsuite. This way future compilers can add new types and old |
| versions of GDB can do something halfway reasonable. |
| |
| Clean up formatting of "info registers" on MIPS and 88k. See if it |
| is possible to do this generically across all target architectures. |
| |
| GDB gets bfd/corefile.c and gdb/corefile.c confused (this should be easy to |
| repeat even with something more recent than GDB 4.9). |
| |
| Check that unmatched RBRAC doesn't abort(). |
| |
| Fix mdebugread.c:parse_type to do fundamental types right (see |
| rs6000_builtin_type in stabsread.c for what "right" is--the point is |
| that the debug format fixes the sizes of these things and it shouldn't |
| depend on stuff like TARGET_PTR_BIT and so on. For mdebug, there seem |
| to be separate bt* codes for 64 bit and 32 bit things, and GDB should |
| be aware of that). Also use a switch statement for clarity and speed. |
| |
| Investigate adding symbols in target_load--some targets do, some |
| don't. |
| |
| Put dirname in psymtabs and change lookup*symtab to use dirname (so |
| /foo/bar.c works whether compiled by cc /foo/bar.c, or cd /foo; cc |
| bar.c). |
| |
| Merge xcoffread.c and coffread.c. Use breakpoint_re_set instead of |
| fixup_breakpoints. |
| |
| Fix byte order and int size sins in tm-a29k.h |
| (EXTRACT_RETURN_VALUE). Perhaps should reproduce bug and verify fix |
| (or perhaps should just fix it...). |
| |
| Make a watchpoint on a constant expression an error (or warning |
| perhaps) |
| |
| Make a watchpoint which contains a function call an error (it is |
| broken now, making it work is probably not worth the effort). |
| |
| Re-do calls to signal() in remote.c, and inflow.c (set_sigint_trap and |
| so on) to be independent of the debugging target, using target_stop to |
| stop the inferior. Probably the part which is now handled by |
| interrupt_query in remote.c can be done without any new features in |
| the debugging target. |
| |
| New test case based on weird.exp but in which type numbers are not |
| renumbered (thus multiply defining a type). This currently causes an |
| infinite loop on "p v_comb". |
| |
| Nuke baseclass_addr. |
| |
| Nuke USG define. |
| |
| "source file more recent" loses on re-read |
| |
| Fix 386 floating point so that floating point registers are real |
| registers (but code can deal at run-time if they are missing, like |
| mips and 68k). This would clean up "info float" and related stuff. |
| |
| Look at Solaris bug in interrupt.exp. Can get out of syscall with |
| PRSABORT (syscall will return EINTR) but merely doing that leads to a |
| "can't read memory" error. |
| |
| gcc -g -c enummask.c then gdb enummask.o, then "p v". GDB complains |
| about not being able to access memory location 0. |
| |
| -------------------- enummask.c |
| enum mask |
| { |
| ANIMAL = 0, |
| VEGETABLE = 1, |
| MINERAL = 2, |
| BASIC_CATEGORY = 3, |
| |
| WHITE = 0, |
| BLUE = 4, |
| GREEN = 8, |
| BLACK = 0xc, |
| COLOR = 0xc, |
| |
| ALIVE = 0x10, |
| |
| LARGE = 0x20 |
| } v; |
| |
| If try to modify value in file with "set write off" should give |
| appropriate error not "cannot access memory at address 0x65e0". |
| |
| Why do we allow a target to omit standard register names (NO_STD_REGS |
| in tm-z8k.h)? I thought the standard register names were supposed to |
| be just that, standard. |
| |
| Allow core file without exec file on RS/6000. |
| |
| Make sure "shell" with no arguments works right on DOS. |
| |
| Make gdb.ini (as well as .gdbinit) be checked on all platforms, so |
| the same directory can be NFS-mounted on unix or DOS, and work the |
| same way. |
| |
| cd ~/tmp/<M-?> causes infinite loop (where ~/tmp is a directory). |
| |
| Get SECT_OFF_TEXT stuff out of objfile_relocate (might be needed to |
| get RS/6000 to work right, might not be immediately relevant). |
| |
| Clean up add_toc_to_loadinfo |
| |
| Think about attached processes and sharing terminal. |
| |
| John sez in reference to ignoring errors from tcsegpgrp if attach_flag: |
| set_tty_state should not have any trouble with attached processes. |
| Instead, the tty handling should leave the pgrp of the tty alone when |
| attaching to processes (perhaps pass terminal_init_inferior a flag |
| saying whether we're attaching). |
| |
| PAGE_SIZE redefined warnings on AIX. Probably should be using |
| BFD_PAGE_SIZE throughout BFD. |
| |
| Rewrite proceed, wait_for_inferior, and normal_stop to clean them up. |
| Suggestions: |
| |
| 1) Make each test in wait_for_inferior a seperate subroutine |
| call. |
| 2) Combine wait_for_inferior and normal_stop to clean up |
| communication via global variables. |
| 3) See if you can find some way to clean up the global |
| variables that are used; possibly group them by data flow |
| and information content? |
| |
| Work out some kind of way to allow running the inferior to be done as |
| a sub-execution of, eg. breakpoint command lists. Currently running |
| the inferior interupts any command list execution. This would require |
| some rewriting of wait_for_inferior & friends, and hence should |
| probably be done in concert with the above. |
| |
| Add function arguments to gdb user defined functions. |
| |
| Add convenience variables that refer to exec file, symbol file, |
| selected frame source file, selected frame function, selected frame |
| line number, etc. |
| |
| Add a "suspend" subcommand of the "continue" command to suspend gdb |
| while continuing execution of the subprocess. Useful when you are |
| debugging servers and you want to dodge out and initiate a connection |
| to a server running under gdb. |
| |
| Add stab information to allow reasonable debugging of inline functions |
| (possibly they should show up on a stack backtrace? With a note |
| indicating that they weren't "real"?). |
| |
| Modify the naked "until" command to step until past the current source |
| line, rather than past the current pc value. This is tricky simply |
| because the low level routines have no way of specifying a multi-line |
| step range, and there is no way of saying "don't print stuff when we |
| stop" from above (otherwise could just call step many times). |
| |
| Modify the handling of symbols grouped through BINCL/EINCL stabs to |
| allocate a partial symtab for each BINCL/EINCL grouping. This will |
| seriously decrease the size of inter-psymtab dependencies and hence |
| lessen the amount that needs to be read in when a new source file is |
| accessed. |
| |
| Do an "x/i $pc" after each stepi or nexti. |
| |
| Modify all of the disassemblers to use printf_filtered to get correct |
| more filtering. |
| |
| Modify gdb to work correctly with Pascal. |
| |
| Add a command for searching memory, a la adb. It specifies size, |
| mask, value, start address. ADB searches until it finds it or hits |
| an error (or is interrupted). |
| |
| Remove the range and type checking code and documentation, if not |
| going to implement. |
| |
| # Local Variables: |
| # mode: text |
| # End: |