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gdbinit.in: make shorthands accept an explicit argument

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Make gdb shorthands such as 'pr' accept an argument, in addition to
implictly taking register '$' as the thing to examine.

The 'eval ...' one-liners are used to workaround GDB bug #22466.

	* gdbinit.in (help-gcc-hooks): New command.
	(pp, pr, prl, pt, pct, pgg, pgq, pgs, pge, pmz, ptc, pdn, ptn, pdd, prc,
	pi, pbm, pel, trt): Take $arg0 instead of $ if supplied. Update
	documentation.
This commit is contained in:
Alexander Monakov 2020-01-17 18:15:44 +03:00
parent 568f0f355f
commit 2c2e9f7a5d
2 changed files with 129 additions and 51 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2020-01-17 Alexander Monakov <amonakov@ispras.ru>
* gdbinit.in (help-gcc-hooks): New command.
(pp, pr, prl, pt, pct, pgg, pgq, pgs, pge, pmz, ptc, pdn, ptn, pdd, prc,
pi, pbm, pel, trt): Take $arg0 instead of $ if supplied. Update
documentation.
2020-01-17 Matthew Malcomson <matthew.malcomson@arm.com>
* config/aarch64/aarch64-sve.md (@aarch64_sve_ld1ro<mode>): Use the

173
gcc/gdbinit.in
View file

@ -16,154 +16,216 @@
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>.
define help-gcc-hooks
help help-gcc-hooks
end
document help-gcc-hooks
GCC gdbinit file introduces several debugging shorthands:
pr [rtx], prl [rtx], prc [rtx], pi [rtx_insn],
pt [tree], pct [tree], ptc [tree], trt [tree],
pgs [tree], pge [tree], pdn [tree], ptn [tree],
pgg [gimple], pgq [gimple_seq],
pmz [mpz_t],
pdd [dw_die_ref],
pbm [bitmap],
pel [location_t],
pp, pbs, pcfun
They are generally implemented by calling a function that prints to stderr,
and therefore will not work when the compiler is not executing.
Most shorthands accept an optional argument. When it is not supplied,
they use value in GDB register $, i.e. the last printed value.
end
define pp
call debug ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug ($debug_arg)
end
document pp
Print a representation of the GCC data structure that is $.
Works only when an inferior is executing.
GCC hook: pp [any]
Print a representation of any GCC data structure for which an instance of
overloaded function 'debug' is available.
See also 'help-gcc-hooks'.
end
define pr
call debug_rtx ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_rtx ($debug_arg)
end
document pr
Print the full structure of the rtx that is $.
Works only when an inferior is executing.
GCC hook: pr [rtx]
Print the full structure of given rtx.
See also 'help-gcc-hooks'.
end
define prl
call debug_rtx_list ($, debug_rtx_count)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_rtx_list ($debug_arg, debug_rtx_count)
end
document prl
Print the full structure of all rtx insns beginning at $.
Works only when an inferior is executing.
GCC hook: prl [rtx]
Print the full structure of all rtx insns beginning at given rtx.
Uses variable debug_rtx_count to control number of insns printed:
debug_rtx_count > 0: print from $ on.
debug_rtx_count < 0: print a window around $.
debug_rtx_count > 0: print from given rtx on.
debug_rtx_count < 0: print a window around given rtx.
There is also debug_rtx_find (rtx, uid) that will scan a list for UID and print
it using debug_rtx_list. Usage example: set $foo=debug_rtx_find(first, 42)
end
define pt
call debug_tree ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_tree ($debug_arg)
end
document pt
Print the full structure of the tree that is $.
Works only when an inferior is executing.
GCC hook: pt [tree]
Print the full structure of given tree.
See also 'help-gcc-hooks'.
end
define pct
call debug_c_tree ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_c_tree ($debug_arg)
end
document pct
Print the tree that is $ in C syntax.
Works only when an inferior is executing.
GCC hook: pct [tree]
Print given tree in C syntax.
See also 'help-gcc-hooks'.
end
define pgg
call debug_gimple_stmt ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_gimple_stmt ($debug_arg)
end
document pgg
Print the Gimple statement that is $ in C syntax.
Works only when an inferior is executing.
GCC hook: pgg [gimple]
Print given GIMPLE statement in C syntax.
See also 'help-gcc-hooks'.
end
define pgq
call debug_gimple_seq ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_gimple_seq ($debug_arg)
end
document pgq
Print the Gimple sequence that is $ in C syntax.
Works only when an inferior is executing.
GCC hook: pgq [gimple_seq]
Print given GIMPLE sequence in C syntax.
See also 'help-gcc-hooks'.
end
define pgs
call debug_generic_stmt ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_generic_stmt ($debug_arg)
end
document pgs
Print the statement that is $ in C syntax.
Works only when an inferior is executing.
GCC hook: pgq [tree]
Print given GENERIC statement in C syntax.
See also 'help-gcc-hooks'.
end
define pge
call debug_generic_expr ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_generic_expr ($debug_arg)
end
document pge
Print the expression that is $ in C syntax.
Works only when an inferior is executing.
GCC hook: pge [tree]
Print given GENERIC expression in C syntax.
See also 'help-gcc-hooks'.
end
define pmz
call mpz_out_str(stderr, 10, $)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call mpz_out_str(stderr, 10, $debug_arg)
end
document pmz
Print the mpz value that is $
Works only when an inferior is executing.
GCC hook: pmz [mpz_t]
Print given mpz value.
See also 'help-gcc-hooks'.
end
define ptc
output (enum tree_code) $.base.code
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
output (enum tree_code) $debug_arg.base.code
echo \n
end
document ptc
Print the tree-code of the tree node that is $.
GCC hook: ptc [tree]
Print the tree-code of given tree node.
See also 'help-gcc-hooks'.
end
define pdn
output $.decl_minimal.name->identifier.id.str
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
output $debug_arg.decl_minimal.name->identifier.id.str
echo \n
end
document pdn
Print the name of the decl-node that is $.
GCC hook: pdn [tree]
Print the name of given decl-node.
See also 'help-gcc-hooks'.
end
define ptn
output $.type.name->decl_minimal.name->identifier.id.str
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
output $debug_arg.type.name->decl_minimal.name->identifier.id.str
echo \n
end
document ptn
Print the name of the type-node that is $.
GCC hook: ptn [tree]
Print the name of given type-node.
See also 'help-gcc-hooks'.
end
define pdd
call debug_dwarf_die ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call debug_dwarf_die ($debug_arg)
end
document pdd
Print the dw_die_ref that is in $.
GCC hook: pdd [dw_die_ref]
Print given dw_die_ref.
See also 'help-gcc-hooks'.
end
define prc
output (enum rtx_code) $.code
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
output (enum rtx_code) $debug_arg.code
echo \ (
output $.mode
output $debug_arg.mode
echo )\n
end
document prc
Print the rtx-code and machine mode of the rtx that is $.
GCC hook: prc [rtx]
Print the rtx-code and machine mode of given rtx.
See also 'help-gcc-hooks'.
end
define pi
print $.u.fld[0].rt_rtx@7
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
print $debug_arg.u.fld[0].rt_rtx@7
end
document pi
Print the fields of an instruction that is $.
GCC hook: pi [rtx_insn]
Print the fields of given RTL instruction.
See also 'help-gcc-hooks'.
end
define pbs
@ -176,20 +238,26 @@ including the global binding level.
end
define pbm
call bitmap_print (stderr, $, "", "\n")
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
call bitmap_print (stderr, $debug_arg, "", "\n")
end
document pbm
Dump the bitmap that is in $ as a comma-separated list of numbers.
GCC hook: pbm [bitmap]
Dump given bitmap as a comma-separated list of numbers.
See also 'help-gcc-hooks'.
end
define pel
output expand_location ($)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
output expand_location ($debug_arg)
echo \n
end
document pel
Print expanded location of $.
GCC hook: pel [location_t]
Print given location.
See also 'help-gcc-hooks'.
end
define pcfun
@ -202,11 +270,14 @@ Print current function.
end
define trt
print ($.typed.type)
eval "set $debug_arg = $%s", $argc ? "arg0" : ""
print ($debug_arg.typed.type)
end
document trt
Print TREE_TYPE of the tree node that is $
GCC hook: trt [tree]
Print TREE_TYPE of given tree node.
See also 'help-gcc-hooks'.
end
define break-on-diagnostic