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Joel Brobecker cf3fbed4a0 problem debugging ravenscar programs if runtime is stripped
Trying to debug a program using a stripped version of the ravenscar
runtime, we can get the following error:

    (gdb) cont
    Continuing.
    Cannot find Ada_Task_Control_Block type. Aborting

This is because the ravenscar-thread layer makes the assumption that
the runtime is built the way we expect it, meaning that the Ada tasking
units we rely on for Ada tasking debugging, are built with debugging
information, and that this debug information has not been stripped from
the runtime.

When this assumption is not true, resuming such a program can trigger
the error above, which then leads GDB a little confused. For instance,
we can see things like:

     (gdb) bt
     Target is executing.

This patch fixes the issue by disabling the ravenscar thread layer
if we detect that the runtime is missing some of the debugging info
we need in order to support Ada task debugging. This is the best
we can do, as the ravenscar-thread layer actually depends on the
ada-tasks layer to implement thread debugging.

gdb/ChangeLog:

        * ada-lang.h (ada_get_tcb_types_info): Add declaration.
        * ada-tasks.c (ada_get_tcb_types_info): Renames get_tcb_types_info.
        Make non-static.  Change return type to char *.  Adjust code
        accordingly.  Rewrite the function's documentation.
        (read_atcb): Adjust call to get_tcb_types_info accordingly.
        * ravenscar-thread.c (ravenscar_inferior_created): Check that
        we have enough debugging information in the runtime to support
        Ada task debugging before we enable the ravenscar-thread layer.
2017-11-21 14:32:48 -08:00
bfd Add NULL bfd test to elf_symbol_from 2017-11-21 11:20:24 +10:30
binutils Add a test for PR binutils/22451 2017-11-21 13:41:51 -08:00
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gas [ARC] Improve printing of pc-relative instructions. 2017-11-21 14:56:16 +01:00
gdb problem debugging ravenscar programs if runtime is stripped 2017-11-21 14:32:48 -08:00
gold Fix typo in ChangeLog entry. 2017-11-19 18:02:31 -08:00
gprof
include Add new AArch64 FP16 FM{A|S} instructions. 2017-11-16 16:27:35 +00:00
intl
ld Stop the v850 linker from converting to other output formats whilst linking. 2017-11-21 14:15:51 +00:00
libdecnumber
libiberty
opcodes [ARC] Improve printing of pc-relative instructions. 2017-11-21 14:56:16 +01:00
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		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.