History log of /haiku/headers/private/kernel/user_debugger.h
Revision Date Author Comments
# b959d46d 10-Apr-2015 Michael Lotz <mmlr@mlotz.ch>

syscalls: Add get_stack_trace and lookup_symbol syscalls.

The get_stack_trace syscall generates a stack trace using the kernel
debugging facilities and copies the resulting return address array to
the preallocated buffer from userland. It is only possible to get a
stack trace of the current thread.

The lookup_symbol syscall can be used to look up the symbol and image
name corresponding to an address. It can be used to resolve symbols
from a stack trace generated by the get_stack_trace syscall. Only
symbols of the current team can be looked up. Note that this uses
the symbol lookup of the kernel debugger which does not support lookup
of all symbols (static functions are missing for example).

This is meant to be used in situations where more elaborate stack trace
generation, like done in the userland debugging helpers, is not possible
due to constraints.


# 73ad2473 05-Nov-2013 Pawel Dziepak <pdziepak@quarnos.org>

Remove remaining unnecessary 'volatile' qualifiers


# 24df6592 11-Jun-2011 Ingo Weinhold <ingo_weinhold@gmx.de>

Merged signals-merge branch into trunk with the following changes:
* Reorganized the kernel locking related to threads and teams.
* We now discriminate correctly between process and thread signals. Signal
handlers have been moved to teams. Fixes #5679.
* Implemented real-time signal support, including signal queuing, SA_SIGINFO
support, sigqueue(), sigwaitinfo(), sigtimedwait(), waitid(), and the addition
of the real-time signal range. Closes #1935 and #2695.
* Gave SIGBUS a separate signal number. Fixes #6704.
* Implemented <time.h> clock and timer support, and fixed/completed alarm() and
[set]itimer(). Closes #5682.
* Implemented support for thread cancellation. Closes #5686.
* Moved send_signal() from <signal.h> to <OS.h>. Fixes #7554.
* Lots over smaller more or less related changes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42116 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 4535495d 10-Jan-2011 Ingo Weinhold <ingo_weinhold@gmx.de>

Merged the signals branch into trunk, with these changes:
* The team and thread kernel structures have been renamed to Team and Thread
respectively and moved into the new BKernel namespace.
* Several (kernel add-on) sources have been converted from C to C++ since
private kernel headers are included that are no longer C compatible.

Changes after merging:
* Fixed gcc 2 build (warnings mainly in the scary firewire bus manager).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40196 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 27a115f6 14-Dec-2010 Rene Gollent <anevilyak@gmail.com>

Revert r39846 and r39847.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39849 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 7040b50d 13-Dec-2010 Rene Gollent <anevilyak@gmail.com>

Add support for thread rename and priority change notifications to the
debugger API/message set.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39846 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 8b3d3d8a 25-Feb-2010 Ingo Weinhold <ingo_weinhold@gmx.de>

Correctly handle cases when a thread single-steps into the kernel as it can
happen on syscalls or "int" instructions. The debug exception handler sets
the thread debug flags B_THREAD_DEBUG_STOP and
B_THREAD_DEBUG_NOTIFY_SINGLE_STEP (new) and lets the thread continue. Before
leaving the kernel the thread is stopped and a single-step notification is
sent. Fixes #3487.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35620 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ac106be5 27-Sep-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Inherit the disable_debugger() flag to a fork()ed child. load_image() doesn't
-- I'm undecided whether it should, too. Fixes #4642.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33330 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 0b11ecb1 21-Jul-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

* Always include the public arch_debugger.h headers. The structures defined
there are prefixed with the respective architecture name. Useful for remote
debugging a different architecture.
* <x86/arch_debugger.h>: Introduced a structure for the FPU state, so that it
isn't left to the debugger.
* Removed the _kern_get_thread_cpu_state() syscall. Was originally intended for
bdb compatiblity, but isn't really needed.
* Kernel x86 arch_get_debug_cpu_state(): The use of fnsave was broken, since
it reinits the FPU after saving the state. This resulted in weird results
when debugging functions using the FPU. We now use fxsave, if available.
Otherwise fnsave + frstor should be used -- not fully implemented yet.
Same for arch_set_debug_cpu_state().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31682 a95241bf-73f2-0310-859d-f6bbb57e9c96


# b0f12d64 23-Jun-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Added transparent software breakpoint support for user debuggers:
* The bulk of the work -- i.e. juggling the software and hardware breakpoints,
watchpoints, and memory reads/writes -- is done in the new class
BreakpointManager.
* For the architectures a few capability macros have to be defined, one
pointing to the software breakpoint instruction opcode. Done for x86.
* Some more simplifications in the user debugger code, made possible by the
recently introduced debugger_changed_condition attribute.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31214 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ba391bcc 22-Jun-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Added team_debug_info::debugger_changed_condition to serialize changes to the
installed team debugger and adjusted the code accordingly. It's not needed yet,
but I intend to add support for software breakpoints and those require a bit of
uninitialization that needs to be synchronized with debugger changes and can't
be done with interrupts disabled.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31194 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 6dcc2a7e 22-Jun-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Made destroy_team_debug_info() static, as it's not used outside the source
file.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31190 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 568ade58 13-Jun-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

User debugger support:
* Generalized address checks. The debugger can now also read the commpage.
* Added new syscall _kern_get_thread_cpu_state() to get the CPU state of a
not running thread. Introduced arch_get_thread_debug_cpu_state() for that
purpose, which is only implemented for x86 ATM (uses the new
i386_get_thread_user_iframe()).
* Don't allow a debugger to change a thread's "esp" anymore. That's the esp
register in the kernel. "user_esp" can still be changed.
* Generally set RF (resume flag) in eflags in interrupt handlers, not only
after a instruction breakpoint debug exception. This should prevent
breakpoints from being triggered more than once (e.g. when the breakpoint is
on an instruction that can cause a page fault). I still saw those with bdb
in VMware, but that might be a VMware bug.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31045 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 002c9410 29-Mar-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Missing "struct thread" declaration, breaking the PPC build.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29780 a95241bf-73f2-0310-859d-f6bbb57e9c96


# e1975d33 23-Feb-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

* When a team debugger is installed automatically, the thread causing that is
stored now.
* Extended the debugger message for B_DEBUGGER_MESSAGE_HANDED_OVER by the
causing thread.
* Also send B_DEBUGGER_MESSAGE_HANDED_OVER to the debugger to which the team
was handed over. The message will be the very first one the debugger gets
from the team in question.
* Some harmless refactoring (added thread_hit_serious_debug_event()).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29302 a95241bf-73f2-0310-859d-f6bbb57e9c96


# f965a969 28-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Extended the profiling API. When using the variable stack trace depth
buffer format, the buffer can now also contain other events than just
stack traces. ATM these are only references to the image events
(created/deleted). Therefore we no longer have to flush the profiling
buffer after such an event, since the debugger can exactly match the
samples. Since we couldn't flush when the profiling timer hit while the
thread was in the kernel, that wasn't working that well anyway.
"profile -f" fails to translate stack trace addresses only very rarely,
now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27775 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 5181b35b 23-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Introduced a separate flag for indicating that disable_debugger() had
been called for a team, and fail installing the default debugger if it
is set. This makes disable_debugger() actually work. Fixes bug #2763.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27713 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 0135e2e3 22-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Increased the maximum profiling caller stack depth significantly.
* Extended the profiling API by an option to record a variable number of
samples per tick. The stack depth is used as a maximum.
* Added new option "-f" to the "profile" tool. When specified it
increments the hit counts of all symbols in the full available caller
stack. I.e. the resulting hit counts will approximate the total time
spent in each function or any function directly or indirectly called
by it. Thus "_start" and "main" will usually get 100% and leaf
functions only what time has actually been spent in them.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27699 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 114c07e6 22-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Overdue copyright update.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27698 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ab30ce0e 22-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Removed obsolete B_DEBUG_MAX_PROFILE_FUNCTIONS.
* Relaxed the stack depth and profiling interval limits a bit.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27697 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ecfad924 20-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Solution for the potential deadlock when needing to flush the profiling
buffer during a timer event that interrupted a kernel function: We do
now flush the buffer as soon as it is 70% full, *if* we didn't interrupt
a kernel function. When the buffer runs full and we still haven't hit a
user function, we drop the tick. The number of dropped ticks is recorded
and sent to the debugger with the next update message.
Reverted the previous partial solution (the temporary disabling of
profiling while in debugger support code).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27658 a95241bf-73f2-0310-859d-f6bbb57e9c96


# eba9a4c3 20-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Introduced a per-team counter that is incremented whenever an image
is created or deleted (or exec*() has been invoked). The counter is
sent with several debugger messages.
* Track the image event counter that is used when samples are added to
the profiling buffer. If the current team counter differs, we flush
the buffer first (sending an update message to the debugger), so that
the debugger has a chance to match the addresses to the correct images.
* Disable profiling for a thread while it runs in the debugger support
code. This fixes potential deadlocks which could occur when a
profiling timer event occurred that would require the buffer to be
flushed while the thread was just sending something to the debugger or
waiting for a command. As it turns out, this is not sufficient either,
since we should never try to flush the buffer when the timer event
occurred in the kernel, since the thread might hold a lock that the
debugger thread could try to acquire. Will implement a more general
solution later.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27656 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 4ed8088f 20-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Added new debugger message B_DEBUGGER_MESSAGE_TEAM_EXEC, sent when
exec*() has been called.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27650 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 78b13af6 19-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

The handling of a full profiling buffer couldn't work for two reasons:
* We can't enable interrupts in an interrupt handler. Instead we use the
newly introduced callback feature, which notifies the debugger right
before returning from the interrupt.
* We didn't indicate that the profiling buffer was full and that the
thread shouldn't be profiled ATM. Therefore it could happen that it
was profiled while trying to notify the debugger that the profiling
buffer was full, resulting in a deadlock. Introduce a respective flag
in the thread debug structure.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27649 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 424f833b 19-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Changed the profiling API: Instead of sending all functions that shall
be tracked to the kernel, which then counts the hits, an area is
passed to kernel in which the hits are recorded. When the area is
full, the debugger is notified. For some reason that part doesn't work
yet -- the whole system freezes when waiting for a reply.
* Reorganized the profile tool code a bit. For one with respect to the
changed API, but also to prepare tracking of image creation/deletion.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27640 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 127f6d39 15-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Decreased minimum profiling sampling interval to 100 us. At least in
VMware this doesn't produce very good results though. In my tests I only
got twice as many hits as with 1 ms, although it should be roughly ten
times as many. Might work better on real hardware.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27572 a95241bf-73f2-0310-859d-f6bbb57e9c96


# cbcebd33 15-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Extended the debugger API by sampling-based profiling support. This is
still pretty much work in progress.
* Introduced init_thread_debug_info() which is used instead of
clear_thread_debug_info() when the thread is created. The latter
requires former initialization.
* user_debug_thread_deleted() is now already invoked in thread_exit(),
not in the undertaker.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27531 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 34b3b26b 10-Jan-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Merged branch haiku/branches/developer/bonefish/optimization revision
23139 into trunk, with roughly the following changes (for details svn
log the branch):
* The int 99 syscall handler is now fully in assembly.
* Added a sysenter/sysexit handler and use it on Pentiums that support
it (via commpage).
* Got rid of i386_handle_trap(). A bit of functionality was moved into
the assembly handler which now uses a jump table to call C functions
handling the respective interrupt.
* Some optimizations to get user debugger support code out of the
interrupt handling path.
* Introduced a thread::flags fields which allows to skip handling of
rare events (signals, user debug enabling/disabling) on the
common interrupt handling path.
* Got rid of the explicit iframe stack. The iframes can still be
retrieved by iterating through the stack frames.
* Made the commpage an architecture independent feature. It's used for
the real time data stuff (instead of creating a separate area).
* The x86 CPU modules can now provide processor optimized versions for
common functions (currently memcpy() only). They are used in the
kernel and are provided to the userland via commpage entries.
* Introduced build system feature allowing easy use of C structure
member offsets in assembly code.

Changes after merging:
* Fixed merge conflict in src/system/kernel/arch/x86/arch_debug.cpp
(caused by refactoring and introduction of "call" debugger command).



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23370 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 65a7804a 29-Aug-2007 Ingo Weinhold <ingo_weinhold@gmx.de>

Set default team debug flags to 0. Threads of a team were
unnecessarily stopped, when another thread crashed.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22119 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 44b5d72b 20-Mar-2007 Ingo Weinhold <ingo_weinhold@gmx.de>

Added new functions to the debugger API:
{set,clear}_debugger_{break,watch}point(), allowing to set/clear break
and watchpoints for the calling team. When a break/watchpoint is hit,
the team enters the debugger. Handy in situations when the program in
question can't really be started in a debugger (or it would be
complicated to do so). The functions work only as long as no debugger is
installed for the team.

We clear the arch specific team and thread debug infos now, when a new
debugger is installed, thus clearing break- and watchpoints.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20396 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 37a25a6c 02-Nov-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Fail, if debug_thread() is invoked for the debug nub thread.
* To always be on the safe side, thread_hit_debug_event() now checks
whether the thread is the debug nub thread.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14655 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 50374cbd 20-Oct-2005 Axel Dörfler <axeld@pinc-software.de>

Changed the signal handling code so that handle_signals() can be called without
having the thread lock held and interrupts disabled.
Cleaned up the signal handling code, and fixed some minor bugs with blockable
vs. non-blockable signals.
thread_debug_info was using uint64 for signals sets instead of sigset_t.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14457 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 3eae1fea 25-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Added support for debugging through exec*().
* Added initialization function. Currently only need to init the
single step hack for qemu.
* Fixed a deadlock when the nub thread destroyed the debug info. It was
waiting for itself.
* Moved the filling in the origin info of the debug messages into
thread_hit_debug_event_internal(). No need for code duplication.
* Writing to user memory can now be partial. We also change the area
protection, if it wasn't writable. Necessary for setting software
breakpoints.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@11996 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 823f4c5b 13-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Various modifications needed due to the changes in <debugger.h>.
* user_debug_break_or_watchpoint_hit() into separate functions for
break- and watchpoints. The one for breakpoints gets another parameter
which indicates whether the breakpoint was a soft- or hardware
breakpoint. This info is also sent to the debugger.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11714 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 293a59b0 12-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* The debug_thread_info records now, which signals the debugger wishes
not to be notified.
* Added debugger commands for setting/getting of thread signal ignore
masks and signal handlers.
* Renamed user_debug_fault_occurred() to a more correct
user_debug_exception_occurred(). It no longer sends a `stopped' message,
but the new one dedicated to exceptions. Additionally the number of the
signal is supplied that will be sent, when the thread continues (without
indicating to ignore the event).


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11703 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 2eece863 10-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Added support for debugger handover.
* Implemented _user_wait_for_debugger().
* Reworked a few bits to ensure that after a remove_team_debugger() or
after requesting a debugger handover the debugger doesn't get any more
messages.
* When the debugger is removed or dies, the debugged threads should now
cleanup their debug info and continue, instead of waiting at their
debug port forever.
All the new features are not tested. Will happen, when gdb will be
debugged.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11664 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 6bbfd262 09-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

New syscall _kern_wait_for_debugger().


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11635 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 2562e518 09-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

Command B_DEBUG_MESSAGE_GET_WHY_STOPPED supports a reply port now.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11633 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ae7c619a 01-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Added architecture specific structure to thread_debug_info.
* Added event callbacks for break- and watchpoints and single stepping.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11520 a95241bf-73f2-0310-859d-f6bbb57e9c96


# a7ad39fe 27-Feb-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* New locking strategy for the team debug info. It's no longer protected
by the team lock, but by a lock in the structure. This is necessary
since we can't acquire the team lock while thread switching, for then the
thread lock is already held.
* Added support for single stepping and break-/watchpoints.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11503 a95241bf-73f2-0310-859d-f6bbb57e9c96


# e988d660 24-Feb-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Added B_TEAM_DEBUG_DEFAULT_FLAGS and B_THREAD_DEBUG_DEFAULT_FLAGS for
convenience.
* Added/implemented callbacks for almost all missing debug events (team,
thread, image creation/deletion, exceptions/faults, signals).
* The debugger can now specify how to deal with the event that stopped an
event (ignore or handle signals, exceptions/faults).
* Implemented B_DEBUGGED_THREAD_GET_WHY_STOPPED debugger message.
* The cpu_state is now passed to the debugger with
B_DEBUGGER_MESSAGE_THREAD_STOPPED notifications.
* Completed _user_debugger() implementation.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11474 a95241bf-73f2-0310-859d-f6bbb57e9c96


# bc797a9e 09-Feb-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

The beginnings of userland debugger support. Currently basically only what is needed for strace is implemented.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11308 a95241bf-73f2-0310-859d-f6bbb57e9c96


# b959d46dbd2f9087ae860dbced40440c28596a6e 10-Apr-2015 Michael Lotz <mmlr@mlotz.ch>

syscalls: Add get_stack_trace and lookup_symbol syscalls.

The get_stack_trace syscall generates a stack trace using the kernel
debugging facilities and copies the resulting return address array to
the preallocated buffer from userland. It is only possible to get a
stack trace of the current thread.

The lookup_symbol syscall can be used to look up the symbol and image
name corresponding to an address. It can be used to resolve symbols
from a stack trace generated by the get_stack_trace syscall. Only
symbols of the current team can be looked up. Note that this uses
the symbol lookup of the kernel debugger which does not support lookup
of all symbols (static functions are missing for example).

This is meant to be used in situations where more elaborate stack trace
generation, like done in the userland debugging helpers, is not possible
due to constraints.


# 73ad2473e7874b3702cf5b0fdf4c81b747812ed9 05-Nov-2013 Pawel Dziepak <pdziepak@quarnos.org>

Remove remaining unnecessary 'volatile' qualifiers


# 24df65921befcd0ad0c5c7866118f922da61cb96 11-Jun-2011 Ingo Weinhold <ingo_weinhold@gmx.de>

Merged signals-merge branch into trunk with the following changes:
* Reorganized the kernel locking related to threads and teams.
* We now discriminate correctly between process and thread signals. Signal
handlers have been moved to teams. Fixes #5679.
* Implemented real-time signal support, including signal queuing, SA_SIGINFO
support, sigqueue(), sigwaitinfo(), sigtimedwait(), waitid(), and the addition
of the real-time signal range. Closes #1935 and #2695.
* Gave SIGBUS a separate signal number. Fixes #6704.
* Implemented <time.h> clock and timer support, and fixed/completed alarm() and
[set]itimer(). Closes #5682.
* Implemented support for thread cancellation. Closes #5686.
* Moved send_signal() from <signal.h> to <OS.h>. Fixes #7554.
* Lots over smaller more or less related changes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42116 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 4535495d80c86e19e2610e7444a4fcefe3e0f8e6 10-Jan-2011 Ingo Weinhold <ingo_weinhold@gmx.de>

Merged the signals branch into trunk, with these changes:
* The team and thread kernel structures have been renamed to Team and Thread
respectively and moved into the new BKernel namespace.
* Several (kernel add-on) sources have been converted from C to C++ since
private kernel headers are included that are no longer C compatible.

Changes after merging:
* Fixed gcc 2 build (warnings mainly in the scary firewire bus manager).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40196 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 27a115f6685cc7821dd2ab6d528d6f3abe70158d 14-Dec-2010 Rene Gollent <anevilyak@gmail.com>

Revert r39846 and r39847.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39849 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 7040b50df5e1483f3e982d5b7ef7c7f79a898b93 13-Dec-2010 Rene Gollent <anevilyak@gmail.com>

Add support for thread rename and priority change notifications to the
debugger API/message set.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39846 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 8b3d3d8a1574eed1d59d052651fefa9af6b1fa6d 25-Feb-2010 Ingo Weinhold <ingo_weinhold@gmx.de>

Correctly handle cases when a thread single-steps into the kernel as it can
happen on syscalls or "int" instructions. The debug exception handler sets
the thread debug flags B_THREAD_DEBUG_STOP and
B_THREAD_DEBUG_NOTIFY_SINGLE_STEP (new) and lets the thread continue. Before
leaving the kernel the thread is stopped and a single-step notification is
sent. Fixes #3487.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35620 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ac106be5344ddb120fe45c16b1d198001e8f96f7 27-Sep-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Inherit the disable_debugger() flag to a fork()ed child. load_image() doesn't
-- I'm undecided whether it should, too. Fixes #4642.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33330 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 0b11ecb18c9afe14114fac959f698a2bfa5b7230 21-Jul-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

* Always include the public arch_debugger.h headers. The structures defined
there are prefixed with the respective architecture name. Useful for remote
debugging a different architecture.
* <x86/arch_debugger.h>: Introduced a structure for the FPU state, so that it
isn't left to the debugger.
* Removed the _kern_get_thread_cpu_state() syscall. Was originally intended for
bdb compatiblity, but isn't really needed.
* Kernel x86 arch_get_debug_cpu_state(): The use of fnsave was broken, since
it reinits the FPU after saving the state. This resulted in weird results
when debugging functions using the FPU. We now use fxsave, if available.
Otherwise fnsave + frstor should be used -- not fully implemented yet.
Same for arch_set_debug_cpu_state().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31682 a95241bf-73f2-0310-859d-f6bbb57e9c96


# b0f12d64f42dc8f5bbabf4cbcdf25178b3eb3749 23-Jun-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Added transparent software breakpoint support for user debuggers:
* The bulk of the work -- i.e. juggling the software and hardware breakpoints,
watchpoints, and memory reads/writes -- is done in the new class
BreakpointManager.
* For the architectures a few capability macros have to be defined, one
pointing to the software breakpoint instruction opcode. Done for x86.
* Some more simplifications in the user debugger code, made possible by the
recently introduced debugger_changed_condition attribute.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31214 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ba391bcc56771ed5e881a4478d3c6a7273a29f1c 22-Jun-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Added team_debug_info::debugger_changed_condition to serialize changes to the
installed team debugger and adjusted the code accordingly. It's not needed yet,
but I intend to add support for software breakpoints and those require a bit of
uninitialization that needs to be synchronized with debugger changes and can't
be done with interrupts disabled.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31194 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 6dcc2a7e00e5e1ae23d3c99b962e61e99a49dfce 22-Jun-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Made destroy_team_debug_info() static, as it's not used outside the source
file.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31190 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 568ade58d054e27ce4cd9da0d4e73ecb79563b96 13-Jun-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

User debugger support:
* Generalized address checks. The debugger can now also read the commpage.
* Added new syscall _kern_get_thread_cpu_state() to get the CPU state of a
not running thread. Introduced arch_get_thread_debug_cpu_state() for that
purpose, which is only implemented for x86 ATM (uses the new
i386_get_thread_user_iframe()).
* Don't allow a debugger to change a thread's "esp" anymore. That's the esp
register in the kernel. "user_esp" can still be changed.
* Generally set RF (resume flag) in eflags in interrupt handlers, not only
after a instruction breakpoint debug exception. This should prevent
breakpoints from being triggered more than once (e.g. when the breakpoint is
on an instruction that can cause a page fault). I still saw those with bdb
in VMware, but that might be a VMware bug.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31045 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 002c9410ed078bfd4f24fa16d49a845867d3fe2b 29-Mar-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

Missing "struct thread" declaration, breaking the PPC build.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29780 a95241bf-73f2-0310-859d-f6bbb57e9c96


# e1975d335369d3bec6473cc1323c65a00e8dc25c 23-Feb-2009 Ingo Weinhold <ingo_weinhold@gmx.de>

* When a team debugger is installed automatically, the thread causing that is
stored now.
* Extended the debugger message for B_DEBUGGER_MESSAGE_HANDED_OVER by the
causing thread.
* Also send B_DEBUGGER_MESSAGE_HANDED_OVER to the debugger to which the team
was handed over. The message will be the very first one the debugger gets
from the team in question.
* Some harmless refactoring (added thread_hit_serious_debug_event()).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29302 a95241bf-73f2-0310-859d-f6bbb57e9c96


# f965a969b17376e47d9d2948ba4a5cfce2a785d0 28-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Extended the profiling API. When using the variable stack trace depth
buffer format, the buffer can now also contain other events than just
stack traces. ATM these are only references to the image events
(created/deleted). Therefore we no longer have to flush the profiling
buffer after such an event, since the debugger can exactly match the
samples. Since we couldn't flush when the profiling timer hit while the
thread was in the kernel, that wasn't working that well anyway.
"profile -f" fails to translate stack trace addresses only very rarely,
now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27775 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 5181b35beebed8380025b8de02756bb0137f9721 23-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Introduced a separate flag for indicating that disable_debugger() had
been called for a team, and fail installing the default debugger if it
is set. This makes disable_debugger() actually work. Fixes bug #2763.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27713 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 0135e2e3242021dd407037b1974bb7e221d5255b 22-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Increased the maximum profiling caller stack depth significantly.
* Extended the profiling API by an option to record a variable number of
samples per tick. The stack depth is used as a maximum.
* Added new option "-f" to the "profile" tool. When specified it
increments the hit counts of all symbols in the full available caller
stack. I.e. the resulting hit counts will approximate the total time
spent in each function or any function directly or indirectly called
by it. Thus "_start" and "main" will usually get 100% and leaf
functions only what time has actually been spent in them.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27699 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 114c07e6e2bb2ce21ff07bd81f9298993b9c5f10 22-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Overdue copyright update.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27698 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ab30ce0e84996f5ba0a4afb07fee02b243db5db6 22-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Removed obsolete B_DEBUG_MAX_PROFILE_FUNCTIONS.
* Relaxed the stack depth and profiling interval limits a bit.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27697 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ecfad924e044a187d0ac9fc4561b45b285e7f8c5 20-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Solution for the potential deadlock when needing to flush the profiling
buffer during a timer event that interrupted a kernel function: We do
now flush the buffer as soon as it is 70% full, *if* we didn't interrupt
a kernel function. When the buffer runs full and we still haven't hit a
user function, we drop the tick. The number of dropped ticks is recorded
and sent to the debugger with the next update message.
Reverted the previous partial solution (the temporary disabling of
profiling while in debugger support code).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27658 a95241bf-73f2-0310-859d-f6bbb57e9c96


# eba9a4c3ee6e7cb89df681a845fb1eaf581fe38e 20-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Introduced a per-team counter that is incremented whenever an image
is created or deleted (or exec*() has been invoked). The counter is
sent with several debugger messages.
* Track the image event counter that is used when samples are added to
the profiling buffer. If the current team counter differs, we flush
the buffer first (sending an update message to the debugger), so that
the debugger has a chance to match the addresses to the correct images.
* Disable profiling for a thread while it runs in the debugger support
code. This fixes potential deadlocks which could occur when a
profiling timer event occurred that would require the buffer to be
flushed while the thread was just sending something to the debugger or
waiting for a command. As it turns out, this is not sufficient either,
since we should never try to flush the buffer when the timer event
occurred in the kernel, since the thread might hold a lock that the
debugger thread could try to acquire. Will implement a more general
solution later.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27656 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 4ed8088f9a98fa69526c08721087a942becc7545 20-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Added new debugger message B_DEBUGGER_MESSAGE_TEAM_EXEC, sent when
exec*() has been called.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27650 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 78b13af677aac2046c677efbcd454ab91a59e5b5 19-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

The handling of a full profiling buffer couldn't work for two reasons:
* We can't enable interrupts in an interrupt handler. Instead we use the
newly introduced callback feature, which notifies the debugger right
before returning from the interrupt.
* We didn't indicate that the profiling buffer was full and that the
thread shouldn't be profiled ATM. Therefore it could happen that it
was profiled while trying to notify the debugger that the profiling
buffer was full, resulting in a deadlock. Introduce a respective flag
in the thread debug structure.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27649 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 424f833bc9646c8d5a317485c96f4371fa3a7636 19-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Changed the profiling API: Instead of sending all functions that shall
be tracked to the kernel, which then counts the hits, an area is
passed to kernel in which the hits are recorded. When the area is
full, the debugger is notified. For some reason that part doesn't work
yet -- the whole system freezes when waiting for a reply.
* Reorganized the profile tool code a bit. For one with respect to the
changed API, but also to prepare tracking of image creation/deletion.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27640 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 127f6d39efccf6df9b75ef60db8c709db939ef23 15-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Decreased minimum profiling sampling interval to 100 us. At least in
VMware this doesn't produce very good results though. In my tests I only
got twice as many hits as with 1 ms, although it should be roughly ten
times as many. Might work better on real hardware.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27572 a95241bf-73f2-0310-859d-f6bbb57e9c96


# cbcebd3330d8701dd854e5958a28bf7e1af50df4 15-Sep-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

* Extended the debugger API by sampling-based profiling support. This is
still pretty much work in progress.
* Introduced init_thread_debug_info() which is used instead of
clear_thread_debug_info() when the thread is created. The latter
requires former initialization.
* user_debug_thread_deleted() is now already invoked in thread_exit(),
not in the undertaker.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27531 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 34b3b26b3b8c46ba46ddde037b10dd173f4936d6 10-Jan-2008 Ingo Weinhold <ingo_weinhold@gmx.de>

Merged branch haiku/branches/developer/bonefish/optimization revision
23139 into trunk, with roughly the following changes (for details svn
log the branch):
* The int 99 syscall handler is now fully in assembly.
* Added a sysenter/sysexit handler and use it on Pentiums that support
it (via commpage).
* Got rid of i386_handle_trap(). A bit of functionality was moved into
the assembly handler which now uses a jump table to call C functions
handling the respective interrupt.
* Some optimizations to get user debugger support code out of the
interrupt handling path.
* Introduced a thread::flags fields which allows to skip handling of
rare events (signals, user debug enabling/disabling) on the
common interrupt handling path.
* Got rid of the explicit iframe stack. The iframes can still be
retrieved by iterating through the stack frames.
* Made the commpage an architecture independent feature. It's used for
the real time data stuff (instead of creating a separate area).
* The x86 CPU modules can now provide processor optimized versions for
common functions (currently memcpy() only). They are used in the
kernel and are provided to the userland via commpage entries.
* Introduced build system feature allowing easy use of C structure
member offsets in assembly code.

Changes after merging:
* Fixed merge conflict in src/system/kernel/arch/x86/arch_debug.cpp
(caused by refactoring and introduction of "call" debugger command).



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23370 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 65a7804abe5c5f41ec6ed589d47f77535a125d56 29-Aug-2007 Ingo Weinhold <ingo_weinhold@gmx.de>

Set default team debug flags to 0. Threads of a team were
unnecessarily stopped, when another thread crashed.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22119 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 44b5d72b5aeb8bba2c348c27022e7cfe1c96f456 20-Mar-2007 Ingo Weinhold <ingo_weinhold@gmx.de>

Added new functions to the debugger API:
{set,clear}_debugger_{break,watch}point(), allowing to set/clear break
and watchpoints for the calling team. When a break/watchpoint is hit,
the team enters the debugger. Handy in situations when the program in
question can't really be started in a debugger (or it would be
complicated to do so). The functions work only as long as no debugger is
installed for the team.

We clear the arch specific team and thread debug infos now, when a new
debugger is installed, thus clearing break- and watchpoints.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20396 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 37a25a6ceb750024cbc7ba8241099c2efcc9050c 02-Nov-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Fail, if debug_thread() is invoked for the debug nub thread.
* To always be on the safe side, thread_hit_debug_event() now checks
whether the thread is the debug nub thread.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14655 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 50374cbdcac9fc96ae187fff7b7a75151a508d65 20-Oct-2005 Axel Dörfler <axeld@pinc-software.de>

Changed the signal handling code so that handle_signals() can be called without
having the thread lock held and interrupts disabled.
Cleaned up the signal handling code, and fixed some minor bugs with blockable
vs. non-blockable signals.
thread_debug_info was using uint64 for signals sets instead of sigset_t.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14457 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 3eae1fea40aa5ecdbc78789c8197964e3861c08d 25-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Added support for debugging through exec*().
* Added initialization function. Currently only need to init the
single step hack for qemu.
* Fixed a deadlock when the nub thread destroyed the debug info. It was
waiting for itself.
* Moved the filling in the origin info of the debug messages into
thread_hit_debug_event_internal(). No need for code duplication.
* Writing to user memory can now be partial. We also change the area
protection, if it wasn't writable. Necessary for setting software
breakpoints.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@11996 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 823f4c5bf4611a2ff646868aff830060d5ee36cd 13-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Various modifications needed due to the changes in <debugger.h>.
* user_debug_break_or_watchpoint_hit() into separate functions for
break- and watchpoints. The one for breakpoints gets another parameter
which indicates whether the breakpoint was a soft- or hardware
breakpoint. This info is also sent to the debugger.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11714 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 293a59b0e9201afa1ab55e8def873c510a98b358 12-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* The debug_thread_info records now, which signals the debugger wishes
not to be notified.
* Added debugger commands for setting/getting of thread signal ignore
masks and signal handlers.
* Renamed user_debug_fault_occurred() to a more correct
user_debug_exception_occurred(). It no longer sends a `stopped' message,
but the new one dedicated to exceptions. Additionally the number of the
signal is supplied that will be sent, when the thread continues (without
indicating to ignore the event).


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11703 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 2eece8633cd548e931fd27d8cb6b0e8e8352fe13 10-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Added support for debugger handover.
* Implemented _user_wait_for_debugger().
* Reworked a few bits to ensure that after a remove_team_debugger() or
after requesting a debugger handover the debugger doesn't get any more
messages.
* When the debugger is removed or dies, the debugged threads should now
cleanup their debug info and continue, instead of waiting at their
debug port forever.
All the new features are not tested. Will happen, when gdb will be
debugged.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11664 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 6bbfd2627b3515f258630235a1c21a583cfe482e 09-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

New syscall _kern_wait_for_debugger().


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11635 a95241bf-73f2-0310-859d-f6bbb57e9c96


# 2562e5185ceebf76f6db759161e6300b2de6f4e6 09-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

Command B_DEBUG_MESSAGE_GET_WHY_STOPPED supports a reply port now.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11633 a95241bf-73f2-0310-859d-f6bbb57e9c96


# ae7c619aaeb01051fe697079b8e3c1fdfaf955dd 01-Mar-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Added architecture specific structure to thread_debug_info.
* Added event callbacks for break- and watchpoints and single stepping.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11520 a95241bf-73f2-0310-859d-f6bbb57e9c96


# a7ad39fe099d10d14ecaac78a0c7b29101a43f04 27-Feb-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* New locking strategy for the team debug info. It's no longer protected
by the team lock, but by a lock in the structure. This is necessary
since we can't acquire the team lock while thread switching, for then the
thread lock is already held.
* Added support for single stepping and break-/watchpoints.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11503 a95241bf-73f2-0310-859d-f6bbb57e9c96


# e988d660225608f53ba8bc7db8758ac04581befd 24-Feb-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

* Added B_TEAM_DEBUG_DEFAULT_FLAGS and B_THREAD_DEBUG_DEFAULT_FLAGS for
convenience.
* Added/implemented callbacks for almost all missing debug events (team,
thread, image creation/deletion, exceptions/faults, signals).
* The debugger can now specify how to deal with the event that stopped an
event (ignore or handle signals, exceptions/faults).
* Implemented B_DEBUGGED_THREAD_GET_WHY_STOPPED debugger message.
* The cpu_state is now passed to the debugger with
B_DEBUGGER_MESSAGE_THREAD_STOPPED notifications.
* Completed _user_debugger() implementation.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11474 a95241bf-73f2-0310-859d-f6bbb57e9c96


# bc797a9ee5f0a730586a71ac47201da724a6bccb 09-Feb-2005 Ingo Weinhold <ingo_weinhold@gmx.de>

The beginnings of userland debugger support. Currently basically only what is needed for strace is implemented.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11308 a95241bf-73f2-0310-859d-f6bbb57e9c96