* SVR4 Process Information:: SVR4 process information
* DJGPP Native:: Features specific to the DJGPP port
* Cygwin Native:: Features specific to the Cygwin port
+* Hurd Native:: Features specific to @sc{gnu} Hurd
@end menu
@node HP-UX
break point within a shared DLL like @file{kernel32.dll} is completely
safe.
+@node Hurd Native
+@subsection Commands specific to @sc{gnu} Hurd systems
+@cindex @sc{gnu} Hurd debugging
+
+This subsection describes @value{GDBN} commands specific to the
+@sc{gnu} Hurd native debugging.
+
+@table @code
+@item set signals
+@itemx set sigs
+@kindex set signals@r{, Hurd command}
+@kindex set sigs@r{, Hurd command}
+This command toggles the state of inferior signal interception by
+@value{GDBN}. Mach exceptions, such as breakpoint traps, are not
+affected by this command. @code{sigs} is a shorthand alias for
+@code{signals}.
+
+@item show signals
+@itemx show sigs
+@kindex show signals@r{, Hurd command}
+@kindex show sigs@r{, Hurd command}
+Show the current state of intercepting inferior's signals.
+
+@item set signal-thread
+@itemx set sigthread
+@kindex set signal-thread
+@kindex set sigthread
+This command tells @value{GDBN} which thread is the @code{libc} signal
+thread. That thread is run when a signal is delivered to a running
+process. @code{set sigthread} is the shorthand alias of @code{set
+signal-thread}.
+
+@item show signal-thread
+@itemx show sigthread
+@kindex show signal-thread
+@kindex show sigthread
+These two commands show which thread will run when the inferior is
+delivered a signal.
+
+@item set stopped
+@kindex set stopped@r{, Hurd command}
+This commands tells @value{GDBN} that the inferior process is stopped,
+as with the @code{SIGSTOP} signal. The stopped process can be
+continued by delivering a signal to it.
+
+@item show stopped
+@kindex show stopped@r{, Hurd command}
+This command shows whether @value{GDBN} thinks the debuggee is
+stopped.
+
+@item set exceptions
+@kindex set exceptions@r{, Hurd command}
+Use this command to turn off trapping of exceptions in the inferior.
+When exception trapping is off, neither breakpoints nor
+single-stepping will work. To restore the default, set exception
+trapping on.
+
+@item show exceptions
+@kindex show exceptions@r{, Hurd command}
+Show the current state of trapping exceptions in the inferior.
+
+@item set task pause
+@kindex set task@r{, Hurd commands}
+@cindex task attributes (@sc{gnu} Hurd)
+@cindex pause current task (@sc{gnu} Hurd)
+This command toggles task suspension when @value{GDBN} has control.
+Setting it to on takes effect immediately, and the task is suspended
+whenever @value{GDBN} gets control. Setting it to off will take
+effect the next time the inferior is continued. If this option is set
+to off, you can use @code{set thread default pause on} or @code{set
+thread pause on} (see below) to pause individual threads.
+
+@item show task pause
+@kindex show task@r{, Hurd commands}
+Show the current state of task suspension.
+
+@item set task detach-suspend-count
+@cindex task suspend count
+@cindex detach from task, @sc{gnu} Hurd
+This command sets the suspend count the task will be left with when
+@value{GDBN} detaches from it.
+
+@item show task detach-suspend-count
+Show the suspend count the task will be left with when detaching.
+
+@item set task exception-port
+@itemx set task excp
+@cindex task exception port, @sc{gnu} Hurd
+This command sets the task exception port to which @value{GDBN} will
+forward exceptions. The argument should be the value of the @dfn{send
+rights} of the task. @code{set task excp} is a shorthand alias.
+
+@item set noninvasive
+@cindex noninvasive task options
+This command switches @value{GDBN} to a mode that is the least
+invasive as far as interfering with the inferior is concerned. This
+is the same as using @code{set task pause}, @code{set exceptions}, and
+@code{set signals} to values opposite to the defaults.
+
+@item info send-rights
+@itemx info receive-rights
+@itemx info port-rights
+@itemx info port-sets
+@itemx info dead-names
+@itemx info ports
+@itemx info psets
+@cindex send rights, @sc{gnu} Hurd
+@cindex receive rights, @sc{gnu} Hurd
+@cindex port rights, @sc{gnu} Hurd
+@cindex port sets, @sc{gnu} Hurd
+@cindex dead names, @sc{gnu} Hurd
+These commands display information about, respectively, send rights,
+receive rights, port rights, port sets, and dead names of a task.
+There are also shorthand aliases: @code{info ports} for @code{info
+port-rights} and @code{info psets} for @code{info port-sets}.
+
+@item set thread pause
+@kindex set thread@r{, Hurd command}
+@cindex thread properties, @sc{gnu} Hurd
+@cindex pause current thread (@sc{gnu} Hurd)
+This command toggles current thread suspension when @value{GDBN} has
+control. Setting it to on takes effect immediately, and the current
+thread is suspended whenever @value{GDBN} gets control. Setting it to
+off will take effect the next time the inferior is continued.
+Normally, this command has no effect, since when @value{GDBN} has
+control, the whole task is suspended. However, if you used @code{set
+task pause off} (see above), this command comes in handy to suspend
+only the current thread.
+
+@item show thread pause
+@kindex show thread@r{, Hurd command}
+This command shows the state of current thread suspension.
+
+@item set thread run
+This comamnd sets whether the current thread is allowed to run.
+
+@item show thread run
+Show whether the current thread is allowed to run.
+
+@item set thread detach-suspend-count
+@cindex thread suspend count, @sc{gnu} Hurd
+@cindex detach from thread, @sc{gnu} Hurd
+This command sets the suspend count @value{GDBN} will leave on a
+thread when detaching. This number is relative to the suspend count
+found by @value{GDBN} when it notices the thread; use @code{set thread
+takeover-suspend-count} to force it to an absolute value.
+
+@item show thread detach-suspend-count
+Show the suspend count @value{GDBN} will leave on the thread when
+detaching.
+
+@item set thread exception-port
+@itemx set thread excp
+Set the thread exception port to which to forward exceptions. This
+overrides the port set by @code{set task exception-port} (see above).
+@code{set thread excp} is the shorthand alias.
+
+@item set thread takeover-suspend-count
+Normally, @value{GDBN}'s thread suspend counts are relative to the
+value @value{GDBN} finds when it notices each thread. This command
+changes the suspend counts to be absolute instead.
+
+@item set thread default
+@itemx show thread default
+@cindex thread default settings, @sc{gnu} Hurd
+Each of the above @code{set thread} commands has a @code{set thread
+default} counterpart (e.g., @code{set thread default pause}, @code{set
+thread default exception-port}, etc.). The @code{thread default}
+variety of commands sets the default thread properties for all
+threads; you can then change the properties of individual threads with
+the non-default commands.
+@end table
+
+
@node Embedded OS
@section Embedded Operating Systems
projects / external / binutils.git / commitdiff