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PR c++/15176:

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* NEWS: Update.
	* break-catch-throw.c (compute_exception): New function.
	(exception_funcs): New global.
	(_initialize_break_catch_throw): Create $_exception.
	* cp-abi.c (cplus_type_from_type_info): New function.
	* cp-abi.h (cplus_type_from_type_info): Declare.
	(struct cp_abi_ops) <get_type_from_type_info>: New field.
	* gnu-v3-abi.c (gnuv3_get_typename_from_type_info)
	(gnuv3_get_type_from_type_info): New functions.
	(init_gnuv3_ops): Set get_type_from_type_info ABI field.
gdb/doc
	* gdb.texinfo (Set Catchpoints): Document $_exception.
	(Convenience Vars): Mention $_exception.
gdb/testsuite
	* gdb.base/default.exp: Update for $_exception.
	* gdb.cp/exceptprint.cc: New file.
	* gdb.cp/exceptprint.exp: New file.
	* lib/gdb.exp (skip_libstdcxx_probe_tests): New proc.
This commit is contained in:
Tom Tromey
2013-04-15 18:09:02 +00:00
parent fc4746a2bd
commit 72f1fe8a88
13 changed files with 344 additions and 0 deletions
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5
gdb/doc/ChangeLog
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@@ -1,3 +1,8 @@
2013-04-15 Tom Tromey <tromey@redhat.com>
* gdb.texinfo (Set Catchpoints): Document $_exception.
(Convenience Vars): Mention $_exception.
2013-04-15 Tom Tromey <tromey@redhat.com>
* gdb.texinfo (Set Catchpoints): Reorganize exception

18
gdb/doc/gdb.texinfo
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@@ -4080,6 +4080,11 @@ Stop when @var{event} occurs. @var{event} can be any of the following:
@cindex stop on C@t{++} exceptions
The throwing, re-throwing, or catching of a C@t{++} exception.
@vindex $_exception@r{, convenience variable}
The convenience variable @code{$_exception} is available at an
exception-related catchpoint, on some systems. This holds the
exception being thrown.
There are currently some limitations to C@t{++} exception handling in
@value{GDBN}:
@@ -4089,6 +4094,15 @@ The support for these commands is system-dependent. Currently, only
systems using the @samp{gnu-v3} C@t{++} ABI (@pxref{ABI}) are
supported.
@item
The @code{$_exception} convenience variable relies on the presence of
some SDT probes in @code{libstdc++}. If these probes are not present,
then this variable cannot be used.
@item
The @code{$_exception} convenience variable is only valid at the
instruction at which an exception-related catchpoint is set.
@item
When an exception-related catchpoint is hit, @value{GDBN} stops at a
location in the system library which implements runtime exception
@@ -9510,6 +9524,10 @@ to match the format in which the data was printed.
The variable @code{$_exitcode} is automatically set to the exit code when
the program being debugged terminates.
@item $_exception
The variable @code{$_exception} is set to the exception object being
thrown at an exception-related catchpoint. @xref{Set Catchpoints}.
@item $_probe_argc
@itemx $_probe_arg0@dots{}$_probe_arg11
Arguments to a static probe. @xref{Static Probe Points}.