[deliverable/binutils-gdb.git] / gdb / testsuite / gdb.base / gnu-ifunc.exp

# Copyright (C) 2009-2018 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

if {[skip_shlib_tests]} {
    return 0
}

standard_testfile .c
set staticexecutable ${testfile}-static
set staticbinfile [standard_output_file ${staticexecutable}]

set libfile "${testfile}-lib"
set libsrc ${libfile}.c

set final_file "${testfile}-final"
set final_src ${final_file}.c

if [get_compiler_info] {
    return -1
}

# Return the binary suffix appended to program and library names to
# make each testcase variant unique.
proc make_binsuffix {resolver_attr resolver_debug final_debug} {
    return "$resolver_attr-$resolver_debug-$final_debug"
}

# Compile the testcase.  RESOLVER_ATTR is true if we're testing with
# an ifunc resolver that has a different name from the user symbol,
# specified with GCC's __attribute__ ifunc.  RESOLVER_DEBUG is true
# iff the resolver was compiled with debug info.  FINAL_DEBUG is true
# iff the target function was compiled with debug info.
proc build {resolver_attr resolver_debug final_debug} {
    global srcdir subdir srcfile binfile
    global libsrc lib_so libfile
    global exec_opts executable
    global hex gdb_prompt
    global final_file final_src

    set suffix [make_binsuffix $resolver_attr $resolver_debug $final_debug]

    set lib_so [standard_output_file ${libfile}-$suffix.so]
    # $lib_o must not have {debug}, it would override the STT_GNU_IFUNC ELF markers.
    set lib_o [standard_output_file ${libfile}-$suffix.o]

    set exec_opts [list debug shlib=$lib_so]

    set lib_opts {}
    set final_opts {}

    if {$resolver_attr} {
	lappend lib_opts "additional_flags=-DIFUNC_RESOLVER_ATTR"
    }

    if {$resolver_debug} {
	lappend lib_opts "debug"
    }

    if {$final_debug} {
	lappend final_opts "debug"
    }

    set final_o $final_file-$suffix.o

    if { [gdb_compile_shlib ${srcdir}/${subdir}/$libsrc \
	      $lib_so $lib_opts] != ""
	 || [gdb_compile ${srcdir}/${subdir}/$final_src \
		 $final_o object $final_opts] != ""
	 || [gdb_compile [list ${srcdir}/${subdir}/$srcfile $final_o] \
		 $binfile-$suffix executable $exec_opts] != ""} {
	untested "failed to compile testcase"
	return 0
    }

    return 1
}

# Test setting a breakpoint on a ifunc function before and after the
# ifunc is resolved.  For the description of RESOLVER_ATTR,
# RESOLVER_DEBUG and FINAL_DEBUG, see the "build" procedure above.
proc_with_prefix set-break {resolver_attr resolver_debug final_debug} {
    global binfile libfile lib_so
    global hex decimal
    global gdb_prompt

    set suffix [make_binsuffix $resolver_attr $resolver_debug $final_debug]

    set lib_so [standard_output_file ${libfile}-$suffix.so]
    clean_restart $binfile-$suffix
    gdb_load_shlib ${lib_so}

    if ![runto_main] then {
	fail "can't run to main"
	return 1
    }

    set ws "\[ \t\]+"
    set dot "\\.?"

    if {$resolver_attr} {
	set gnu_ifunc_resolver "gnu_ifunc_resolver"
    } else {
	set gnu_ifunc_resolver "gnu_ifunc"
    }

    if {!$resolver_debug} {
	set gnu_ifunc_resolver "${dot}${gnu_ifunc_resolver}"
    }

    if {!$final_debug} {
	set final "${dot}final"
    } else {
	set final "final"
    }

    with_test_prefix "before resolving" {
	delete_breakpoints
	gdb_test "break gnu_ifunc" \
	    "Breakpoint $decimal at gnu-indirect-function resolver at $hex"
	gdb_test "info breakpoints" \
	    "$decimal${ws}STT_GNU_IFUNC resolver${ws}keep${ws}y${ws}$hex <${gnu_ifunc_resolver}>"
    }

    global final_src

    with_test_prefix "resolve" {
	delete_breakpoints
	gdb_breakpoint [gdb_get_line_number "break-at-exit"]
	gdb_continue_to_breakpoint "break-at-exit" ".*break-at-exit.*"
    }

    with_test_prefix "after resolving" {
	delete_breakpoints

	if {!$final_debug} {
	    # Set a breakpoint both at the ifunc, and at the ifunc's
	    # target.  GDB should resolve both to the same address.
	    # Start with the ifunc's target.
	    set addr "-"
	    set test "break final"
	    # Extract the address without the leading "0x", because
	    # addresses in "info break" output include leading 0s
	    # (like "0x0000ADDR").
	    set hex_number {[0-9a-fA-F][0-9a-fA-F]*}
	    gdb_test_multiple $test $test {
		-re "Breakpoint .* at 0x($hex_number)\r\n$gdb_prompt $" {
		    set addr $expect_out(1,string)
		    pass $test
		}
	    }

	    # Now set a break at the ifunc.
	    gdb_test "break gnu_ifunc" "Breakpoint .* at 0x$addr"
	    set location "$decimal${ws}breakpoint${ws}keep${ws}y${ws}0x0*$addr${ws}<${final}\\+.*>"
	} else {
	    set lineno -1
	    set test "break final"
	    gdb_test_multiple $test $test {
		-re "Breakpoint .* at $hex: file .*$final_src, line ($decimal)\\.\r\n$gdb_prompt $" {
		    set lineno $expect_out(1,string)
		    pass $test
		}
	    }
	    gdb_test "break gnu_ifunc" "Breakpoint .* at $hex: file .*$final_src, line $lineno\\."
	    set location "$decimal${ws}breakpoint${ws}keep${ws}y${ws}$hex in final at .*$final_src:$lineno"
	}
	gdb_test "info breakpoints" "$location\r\n$location"
    }
}

# Misc GNU ifunc tests.  For the description of RESOLVER_ATTR,
# RESOLVER_DEBUG and FINAL_DEBUG, see the "build" procedure above.
proc misc_tests {resolver_attr resolver_debug final_debug} {
    global srcdir subdir srcfile binfile
    global libsrc lib_so libfile
    global exec_opts executable
    global hex gdb_prompt
    global final_file final_src

    set suffix [make_binsuffix $resolver_attr $resolver_debug $final_debug]

    if {$resolver_attr} {
	set gnu_ifunc_resolver "gnu_ifunc_resolver"
    } else {
	set gnu_ifunc_resolver "gnu_ifunc"
    }

    set dot "\\.?"

    if {!$resolver_debug} {
	set gnu_ifunc_resolver "${dot}${gnu_ifunc_resolver}"
    }

    if {!$final_debug} {
	set final "${dot}final"
    } else {
	set final "final"
    }

    # Start with a fresh gdb.

    clean_restart $binfile-$suffix
    gdb_load_shlib ${lib_so}

    if ![runto_main] then {
	fail "can't run to main"
	return 1
    }

    # The "if" condition is artifical to test regression of a former patch.
    gdb_breakpoint "[gdb_get_line_number "break-at-nextcall"] if i && (int) gnu_ifunc (i) != 42"

    gdb_breakpoint [gdb_get_line_number "break-at-call"]
    gdb_continue_to_breakpoint "break-at-call" ".*break-at-call.*"

    # Test GDB will automatically indirect the call.

    if {!$resolver_debug && !$final_debug} {
	gdb_test "p gnu_ifunc()" \
	    "'${dot}final' has unknown return type; cast the call to its declared return type"
	gdb_test "p gnu_ifunc (3)" \
	    "'${dot}final' has unknown return type; cast the call to its declared return type"
	gdb_test "p (int) gnu_ifunc (3)" " = 4"
    } else {
	gdb_test "p gnu_ifunc()" "Too few arguments in function call\\."
	gdb_test "p gnu_ifunc (3)" " = 4"
    }

    # Test that the resolver received its argument.

    set actual_hwcap "0x0"
    set test "info auxv"
    gdb_test_multiple $test $test {
	-re "\r\n\\d+\\s+AT_HWCAP\[^\r\n\]+($hex)\r\n.*$gdb_prompt $" {
	    set actual_hwcap $expect_out(1,string)
	}
	-re ".*$gdb_prompt $" {
	    pass "$test (no HWCAP)"
	}
    }

    gdb_test "p/x resolver_hwcap" "= $actual_hwcap" "resolver received HWCAP"

    # Test GDB will skip the gnu_ifunc resolver on first call.

    # Even if the resolver has debug info, stepping into an ifunc call
    # should skip the resolver.
    if {!$final_debug} {
	# Make GDB stop stepping even if it steps into a function with
	# no debug info.
	gdb_test_no_output "set step-mode on"
	gdb_test "step" "$hex in ${dot}final \\\(\\\)"
    } else {
	gdb_test "step" "\r\nfinal .*"
    }

    # Test GDB will not break before the final chosen implementation.

    # Also test a former patch regression:
    # Continuing.
    # Error in testing breakpoint condition:
    # Attempt to take address of value not located in memory.
    #
    # Breakpoint 2, main () at ./gdb.base/gnu-ifunc.c:33

    gdb_test "continue" \
	"Continuing.\r\n\r\nBreakpoint .* (at|in) .*break-at-nextcall.*" \
	"continue to break-at-nextcall"

    gdb_breakpoint "gnu_ifunc"

    gdb_continue_to_breakpoint "nextcall gnu_ifunc"

    gdb_test "frame" \
	"#0 +(0x\[0-9a-f\]+ in +)?${final} \\(.*" "nextcall gnu_ifunc skipped"

    # Check any commands not doing an inferior call access the address of the
    # STT_GNU_IFUNC resolver, not the target function.

    if {[istarget powerpc64-*] && [is_lp64_target]} {
	# With only minimal symbols GDB provides the function descriptors.  With
	# full debug info the function code would be displayed.
    }

    gdb_test "p gnu_ifunc" \
	" = {<text gnu-indirect-function variable, no debug info>} 0x\[0-9a-f\]+ <${gnu_ifunc_resolver}>" \
	"p gnu_ifunc executing"
    gdb_test "info sym gnu_ifunc" \
	"${gnu_ifunc_resolver} in section .*" \
	"info sym gnu_ifunc executing"

    set test "info addr gnu_ifunc"
    if {!$resolver_attr && $resolver_debug} {
	gdb_test_multiple $test $test {
	    -re "Symbol \"gnu_ifunc\" is a function at address (0x\[0-9a-f\]+).*$gdb_prompt $" {
		pass $test
	    }
	}
    } else {
	gdb_test_multiple $test $test {
	    -re "Symbol \"gnu_ifunc\" is at (0x\[0-9a-f\]+) in .*$gdb_prompt $" {
		pass $test
	    }
	}
    }
    gdb_test "info sym $expect_out(1,string)" \
	"${gnu_ifunc_resolver} in section .*" \
	"info sym <gnu_ifunc-address>"

    # Test calling the resolver directly instead of the ifunc symbol.
    # Can only do that if the ifunc and the ifunc resolver have
    # different names.
    if {$resolver_attr} {
	if {$resolver_debug} {
	    if {[istarget powerpc64-*] && [is_lp64_target]} {
		gdb_test "p gnu_ifunc_resolver(0)" \
		    " = \\(int \\(\\*\\)\\(int\\)\\) @$hex: $hex <${final}>"
	    } else {
		gdb_test "p gnu_ifunc_resolver(0)" \
		    " = \\(int \\(\\*\\)\\(int\\)\\) $hex <final>"
	    }
	} else {
	    gdb_test "p gnu_ifunc_resolver(0)" \
		"'${gnu_ifunc_resolver}' has unknown return type; cast the call to its declared return type"
	    gdb_test "p (void *) gnu_ifunc_resolver(0)" \
		" = \\(void \\*\\) $hex <${final}>"
	}
    }
}

# Test all the combinations of:
#
# - An ifunc resolver with the same name as the ifunc symbol vs an
#   ifunc resolver with a different name as the ifunc symbol.
#
# - ifunc resolver compiled with and without debug info.  This ensures
#   that GDB understands that a function not a regular function by
#   looking at the STT_GNU_IFUNC type in the elf symbols.  DWARF has
#   no way to express the STT_GNU_IFUNC type.
#
# - ifunc target function (resolved) compiled with and without debug
#   info.
foreach_with_prefix resolver_attr {0 1} {
    foreach_with_prefix resolver_debug {0 1} {
	foreach_with_prefix final_debug {0 1} {
	    build $resolver_attr $resolver_debug $final_debug
	    misc_tests $resolver_attr $resolver_debug $final_debug
	    set-break $resolver_attr $resolver_debug $final_debug
	}
    }
}

# Test statically linked ifunc resolving during inferior start.
# https://bugzilla.redhat.com/show_bug.cgi?id=624967

with_test_prefix "static" {
    # Compile $staticbinfile separately as it may exit on error
    # (ld/12595).

    set lib_o [standard_output_file ${libfile}.o]
    set final_o [standard_output_file ${final_file}.o]
    if { [gdb_compile ${srcdir}/${subdir}/$libsrc $lib_o object {}] != ""
	 || [gdb_compile ${srcdir}/${subdir}/$final_src $final_o object {}] != ""
	 || [gdb_compile "${srcdir}/${subdir}/$srcfile $lib_o $final_o" \
		 $staticbinfile executable {debug}] != "" } {
	untested "failed to compile second testcase"
	return -1
    }

    clean_restart $staticexecutable

    gdb_breakpoint "gnu_ifunc"
    gdb_breakpoint "main"
    gdb_run_cmd
    gdb_test "" "Breakpoint \[0-9\]*, main .*" "static gnu_ifunc"
}
Commit	Line	Data
e2882c85	1	# Copyright (C) 2009-2018 Free Software Foundation, Inc.
e4620230 JK	2
	3	# This program is free software; you can redistribute it and/or modify
	4	# it under the terms of the GNU General Public License as published by
	5	# the Free Software Foundation; either version 3 of the License, or
	6	# (at your option) any later version.
	7	#
	8	# This program is distributed in the hope that it will be useful,
	9	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	# GNU General Public License for more details.
	12	#
	13	# You should have received a copy of the GNU General Public License
	14	# along with this program. If not, see <http://www.gnu.org/licenses/>.
	15
	16	if {[skip_shlib_tests]} {
	17	return 0
	18	}
	19
289f9037	20	standard_testfile .c
c7075ad5	21	set staticexecutable ${testfile}-static
289f9037	22	set staticbinfile [standard_output_file ${staticexecutable}]
e4620230 JK	23
	24	set libfile "${testfile}-lib"
	25	set libsrc ${libfile}.c
e4620230	26
c7075ad5 PA	27	set final_file "${testfile}-final"
c7075ad5 PA	28	set final_src ${final_file}.c
e4620230	29
4c93b1db	30	if [get_compiler_info] {
e4620230 JK	31	return -1
	32	}
	33
c7075ad5 PA	34	# Return the binary suffix appended to program and library names to
	35	# make each testcase variant unique.
	36	proc make_binsuffix {resolver_attr resolver_debug final_debug} {
	37	return "$resolver_attr-$resolver_debug-$final_debug"
e4620230 JK	38	}
e4620230 JK	39
c7075ad5 PA	40	# Compile the testcase. RESOLVER_ATTR is true if we're testing with
	41	# an ifunc resolver that has a different name from the user symbol,
	42	# specified with GCC's __attribute__ ifunc. RESOLVER_DEBUG is true
	43	# iff the resolver was compiled with debug info. FINAL_DEBUG is true
	44	# iff the target function was compiled with debug info.
	45	proc build {resolver_attr resolver_debug final_debug} {
	46	global srcdir subdir srcfile binfile
	47	global libsrc lib_so libfile
	48	global exec_opts executable
	49	global hex gdb_prompt
	50	global final_file final_src
	51
	52	set suffix [make_binsuffix $resolver_attr $resolver_debug $final_debug]
	53
	54	set lib_so [standard_output_file ${libfile}-$suffix.so]
	55	# $lib_o must not have {debug}, it would override the STT_GNU_IFUNC ELF markers.
	56	set lib_o [standard_output_file ${libfile}-$suffix.o]
	57
	58	set exec_opts [list debug shlib=$lib_so]
	59
	60	set lib_opts {}
	61	set final_opts {}
	62
	63	if {$resolver_attr} {
	64	lappend lib_opts "additional_flags=-DIFUNC_RESOLVER_ATTR"
	65	}
	66
	67	if {$resolver_debug} {
	68	lappend lib_opts "debug"
	69	}
	70
	71	if {$final_debug} {
	72	lappend final_opts "debug"
	73	}
e4620230	74
c7075ad5 PA	75	set final_o $final_file-$suffix.o
	76
	77	if { [gdb_compile_shlib ${srcdir}/${subdir}/$libsrc \
	78	$lib_so $lib_opts] != ""
	79	\|\| [gdb_compile ${srcdir}/${subdir}/$final_src \
	80	$final_o object $final_opts] != ""
	81	\|\| [gdb_compile [list ${srcdir}/${subdir}/$srcfile $final_o] \
	82	$binfile-$suffix executable $exec_opts] != ""} {
	83	untested "failed to compile testcase"
	84	return 0
	85	}
e4620230	86
ae59b1da	87	return 1
e4620230 JK	88	}
e4620230 JK	89
c7075ad5 PA	90	# Test setting a breakpoint on a ifunc function before and after the
	91	# ifunc is resolved. For the description of RESOLVER_ATTR,
	92	# RESOLVER_DEBUG and FINAL_DEBUG, see the "build" procedure above.
	93	proc_with_prefix set-break {resolver_attr resolver_debug final_debug} {
	94	global binfile libfile lib_so
	95	global hex decimal
	96	global gdb_prompt
	97
	98	set suffix [make_binsuffix $resolver_attr $resolver_debug $final_debug]
	99
	100	set lib_so [standard_output_file ${libfile}-$suffix.so]
	101	clean_restart $binfile-$suffix
	102	gdb_load_shlib ${lib_so}
	103
	104	if ![runto_main] then {
	105	fail "can't run to main"
	106	return 1
	107	}
	108
	109	set ws "\[ \t\]+"
	110	set dot "\\.?"
e4620230	111
c7075ad5 PA	112	if {$resolver_attr} {
	113	set gnu_ifunc_resolver "gnu_ifunc_resolver"
	114	} else {
	115	set gnu_ifunc_resolver "gnu_ifunc"
	116	}
e4620230	117
c7075ad5 PA	118	if {!$resolver_debug} {
	119	set gnu_ifunc_resolver "${dot}${gnu_ifunc_resolver}"
	120	}
e4620230	121
c7075ad5 PA	122	if {!$final_debug} {
	123	set final "${dot}final"
	124	} else {
	125	set final "final"
	126	}
e4620230	127
c7075ad5 PA	128	with_test_prefix "before resolving" {
	129	delete_breakpoints
	130	gdb_test "break gnu_ifunc" \
	131	"Breakpoint $decimal at gnu-indirect-function resolver at $hex"
	132	gdb_test "info breakpoints" \
	133	"$decimal${ws}STT_GNU_IFUNC resolver${ws}keep${ws}y${ws}$hex <${gnu_ifunc_resolver}>"
	134	}
e1b2624a	135
c7075ad5 PA	136	global final_src
	137
	138	with_test_prefix "resolve" {
	139	delete_breakpoints
	140	gdb_breakpoint [gdb_get_line_number "break-at-exit"]
	141	gdb_continue_to_breakpoint "break-at-exit" ".break-at-exit."
e1b2624a	142	}
c7075ad5 PA	143
	144	with_test_prefix "after resolving" {
	145	delete_breakpoints
	146
	147	if {!$final_debug} {
	148	# Set a breakpoint both at the ifunc, and at the ifunc's
	149	# target. GDB should resolve both to the same address.
	150	# Start with the ifunc's target.
	151	set addr "-"
	152	set test "break final"
	153	# Extract the address without the leading "0x", because
	154	# addresses in "info break" output include leading 0s
	155	# (like "0x0000ADDR").
	156	set hex_number {[0-9a-fA-F][0-9a-fA-F]*}
	157	gdb_test_multiple $test $test {
	158	-re "Breakpoint .* at 0x($hex_number)\r\n$gdb_prompt $" {
	159	set addr $expect_out(1,string)
	160	pass $test
	161	}
	162	}
	163
	164	# Now set a break at the ifunc.
	165	gdb_test "break gnu_ifunc" "Breakpoint .* at 0x$addr"
	166	set location "$decimal${ws}breakpoint${ws}keep${ws}y${ws}0x0$addr${ws}<${final}\\+.>"
	167	} else {
	168	set lineno -1
	169	set test "break final"
	170	gdb_test_multiple $test $test {
	171	-re "Breakpoint .* at $hex: file .*$final_src, line ($decimal)\\.\r\n$gdb_prompt $" {
	172	set lineno $expect_out(1,string)
	173	pass $test
	174	}
	175	}
	176	gdb_test "break gnu_ifunc" "Breakpoint .* at $hex: file .*$final_src, line $lineno\\."
	177	set location "$decimal${ws}breakpoint${ws}keep${ws}y${ws}$hex in final at .*$final_src:$lineno"
	178	}
	179	gdb_test "info breakpoints" "$location\r\n$location"
e1b2624a AA	180	}
	181	}
	182
c7075ad5 PA	183	# Misc GNU ifunc tests. For the description of RESOLVER_ATTR,
	184	# RESOLVER_DEBUG and FINAL_DEBUG, see the "build" procedure above.
	185	proc misc_tests {resolver_attr resolver_debug final_debug} {
	186	global srcdir subdir srcfile binfile
	187	global libsrc lib_so libfile
	188	global exec_opts executable
	189	global hex gdb_prompt
	190	global final_file final_src
	191
	192	set suffix [make_binsuffix $resolver_attr $resolver_debug $final_debug]
	193
	194	if {$resolver_attr} {
	195	set gnu_ifunc_resolver "gnu_ifunc_resolver"
	196	} else {
	197	set gnu_ifunc_resolver "gnu_ifunc"
	198	}
	199
	200	set dot "\\.?"
e1b2624a	201
c7075ad5 PA	202	if {!$resolver_debug} {
	203	set gnu_ifunc_resolver "${dot}${gnu_ifunc_resolver}"
	204	}
e4620230	205
c7075ad5 PA	206	if {!$final_debug} {
	207	set final "${dot}final"
	208	} else {
	209	set final "final"
	210	}
e4620230	211
c7075ad5	212	# Start with a fresh gdb.
e4620230	213
c7075ad5 PA	214	clean_restart $binfile-$suffix
c7075ad5 PA	215	gdb_load_shlib ${lib_so}
e4620230	216
c7075ad5 PA	217	if ![runto_main] then {
	218	fail "can't run to main"
	219	return 1
	220	}
e4620230	221
c7075ad5 PA	222	# The "if" condition is artifical to test regression of a former patch.
c7075ad5 PA	223	gdb_breakpoint "[gdb_get_line_number "break-at-nextcall"] if i && (int) gnu_ifunc (i) != 42"
e4620230	224
c7075ad5 PA	225	gdb_breakpoint [gdb_get_line_number "break-at-call"]
c7075ad5 PA	226	gdb_continue_to_breakpoint "break-at-call" ".break-at-call."
e4620230	227
c7075ad5	228	# Test GDB will automatically indirect the call.
e4620230	229
c7075ad5 PA	230	if {!$resolver_debug && !$final_debug} {
	231	gdb_test "p gnu_ifunc()" \
	232	"'${dot}final' has unknown return type; cast the call to its declared return type"
	233	gdb_test "p gnu_ifunc (3)" \
	234	"'${dot}final' has unknown return type; cast the call to its declared return type"
	235	gdb_test "p (int) gnu_ifunc (3)" " = 4"
	236	} else {
	237	gdb_test "p gnu_ifunc()" "Too few arguments in function call\\."
	238	gdb_test "p gnu_ifunc (3)" " = 4"
	239	}
e4620230	240
c7075ad5 PA	241	# Test that the resolver received its argument.
	242
	243	set actual_hwcap "0x0"
	244	set test "info auxv"
	245	gdb_test_multiple $test $test {
	246	-re "\r\n\\d+\\s+AT_HWCAP\[^\r\n\]+($hex)\r\n.*$gdb_prompt $" {
	247	set actual_hwcap $expect_out(1,string)
	248	}
	249	-re ".*$gdb_prompt $" {
	250	pass "$test (no HWCAP)"
	251	}
	252	}
e4620230	253
c7075ad5	254	gdb_test "p/x resolver_hwcap" "= $actual_hwcap" "resolver received HWCAP"
e4620230	255
c7075ad5	256	# Test GDB will skip the gnu_ifunc resolver on first call.
e4620230	257
c7075ad5 PA	258	# Even if the resolver has debug info, stepping into an ifunc call
	259	# should skip the resolver.
	260	if {!$final_debug} {
	261	# Make GDB stop stepping even if it steps into a function with
	262	# no debug info.
	263	gdb_test_no_output "set step-mode on"
	264	gdb_test "step" "$hex in ${dot}final \\\(\\\)"
	265	} else {
	266	gdb_test "step" "\r\nfinal .*"
	267	}
	268
	269	# Test GDB will not break before the final chosen implementation.
	270
	271	# Also test a former patch regression:
	272	# Continuing.
	273	# Error in testing breakpoint condition:
	274	# Attempt to take address of value not located in memory.
	275	#
	276	# Breakpoint 2, main () at ./gdb.base/gnu-ifunc.c:33
	277
	278	gdb_test "continue" \
	279	"Continuing.\r\n\r\nBreakpoint .* (at\|in) .break-at-nextcall." \
	280	"continue to break-at-nextcall"
	281
	282	gdb_breakpoint "gnu_ifunc"
	283
	284	gdb_continue_to_breakpoint "nextcall gnu_ifunc"
	285
	286	gdb_test "frame" \
	287	"#0 +(0x\[0-9a-f\]+ in +)?${final} \\(.*" "nextcall gnu_ifunc skipped"
	288
	289	# Check any commands not doing an inferior call access the address of the
	290	# STT_GNU_IFUNC resolver, not the target function.
	291
	292	if {[istarget powerpc64-*] && [is_lp64_target]} {
	293	# With only minimal symbols GDB provides the function descriptors. With
	294	# full debug info the function code would be displayed.
	295	}
	296
	297	gdb_test "p gnu_ifunc" \
	298	" = {<text gnu-indirect-function variable, no debug info>} 0x\[0-9a-f\]+ <${gnu_ifunc_resolver}>" \
	299	"p gnu_ifunc executing"
	300	gdb_test "info sym gnu_ifunc" \
	301	"${gnu_ifunc_resolver} in section .*" \
	302	"info sym gnu_ifunc executing"
	303
	304	set test "info addr gnu_ifunc"
	305	if {!$resolver_attr && $resolver_debug} {
	306	gdb_test_multiple $test $test {
	307	-re "Symbol \"gnu_ifunc\" is a function at address (0x\[0-9a-f\]+).*$gdb_prompt $" {
	308	pass $test
	309	}
	310	}
	311	} else {
	312	gdb_test_multiple $test $test {
	313	-re "Symbol \"gnu_ifunc\" is at (0x\[0-9a-f\]+) in .*$gdb_prompt $" {
	314	pass $test
	315	}
	316	}
	317	}
	318	gdb_test "info sym $expect_out(1,string)" \
	319	"${gnu_ifunc_resolver} in section .*" \
	320	"info sym <gnu_ifunc-address>"
	321
322	# Test calling the resolver directly instead of the ifunc symbol.
323	# Can only do that if the ifunc and the ifunc resolver have
324	# different names.
325	if {$resolver_attr} {
326	if {$resolver_debug} {
327	if {[istarget powerpc64-*] && [is_lp64_target]} {
328	gdb_test "p gnu_ifunc_resolver(0)" \
329	" = \\(int \\(\\*\\)\\(int\\)\\) @$hex: $hex <${final}>"
330	} else {
331	gdb_test "p gnu_ifunc_resolver(0)" \
332	" = \\(int \\(\\*\\)\\(int\\)\\) $hex <final>"
333	}
334	} else {
335	gdb_test "p gnu_ifunc_resolver(0)" \
336	"'${gnu_ifunc_resolver}' has unknown return type; cast the call to its declared return type"
337	gdb_test "p (void *) gnu_ifunc_resolver(0)" \
338	" = \\(void \\*\\) $hex <${final}>"
339	}
e4620230 JK	340	}
e4620230 JK	341	}
e4620230	342
c7075ad5 PA	343	# Test all the combinations of:
	344	#
	345	# - An ifunc resolver with the same name as the ifunc symbol vs an
	346	# ifunc resolver with a different name as the ifunc symbol.
	347	#
	348	# - ifunc resolver compiled with and without debug info. This ensures
	349	# that GDB understands that a function not a regular function by
	350	# looking at the STT_GNU_IFUNC type in the elf symbols. DWARF has
	351	# no way to express the STT_GNU_IFUNC type.
	352	#
	353	# - ifunc target function (resolved) compiled with and without debug
	354	# info.
	355	foreach_with_prefix resolver_attr {0 1} {
	356	foreach_with_prefix resolver_debug {0 1} {
	357	foreach_with_prefix final_debug {0 1} {
	358	build $resolver_attr $resolver_debug $final_debug
	359	misc_tests $resolver_attr $resolver_debug $final_debug
	360	set-break $resolver_attr $resolver_debug $final_debug
	361	}
	362	}
	363	}
e4620230 JK	364
	365	# Test statically linked ifunc resolving during inferior start.
	366	# https://bugzilla.redhat.com/show_bug.cgi?id=624967
	367
c7075ad5 PA	368	with_test_prefix "static" {
	369	# Compile $staticbinfile separately as it may exit on error
	370	# (ld/12595).
	371
	372	set lib_o [standard_output_file ${libfile}.o]
	373	set final_o [standard_output_file ${final_file}.o]
	374	if { [gdb_compile ${srcdir}/${subdir}/$libsrc $lib_o object {}] != ""
	375	\|\| [gdb_compile ${srcdir}/${subdir}/$final_src $final_o object {}] != ""
	376	\|\| [gdb_compile "${srcdir}/${subdir}/$srcfile $lib_o $final_o" \
	377	$staticbinfile executable {debug}] != "" } {
	378	untested "failed to compile second testcase"
	379	return -1
	380	}
e4620230	381
c7075ad5	382	clean_restart $staticexecutable
e4620230	383
c7075ad5 PA	384	gdb_breakpoint "gnu_ifunc"
	385	gdb_breakpoint "main"
	386	gdb_run_cmd
	387	gdb_test "" "Breakpoint \[0-9\], main ." "static gnu_ifunc"
	388	}