gcc/testsuite/lib/lto.exp

   1 # Copyright (C) 2009-2014 Free Software Foundation, Inc.
   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 GCC; see the file COPYING3.  If not see
  15 # <http://www.gnu.org/licenses/>.
  16
  17 # Contributed by Diego Novillo <dnovillo@google.com>
  18
  19 # Prune messages that aren't useful.
  20
  21 proc lto_prune_warns { text } {
  22
  23     verbose "lto_prune_warns: entry: $text" 2
  24
  25     # Many tests that use visibility will still pass on platforms that don't support it.
  26     regsub -all "(^|\n)\[^\n\]*: warning: visibility attribute not supported in this configuration; ignored\[^\n\]*" $text "" text
  27
  28     # Allow mixed-language LTO tests to pass with make check-c++0x
  29     regsub -all "(^|\n)\[^\n\]*: warning: command line option '-std=\[^\n\]*" $text "" text
  30
  31     # And any stray location lines.
  32     regsub -all "(^|\n)\[^\n\]*: In function \[^\n\]*" $text "" text
  33     regsub -all "(^|\n)In file included from \[^\n\]*" $text "" text
  34     regsub -all "(^|\n)\[ \t\]*from \[^\n\]*" $text "" text
  35
  36     # Sun ld warns about common symbols with differing sizes.  Unlike GNU ld
  37     # --warn-common (off by default), they cannot be disabled.
  38     regsub -all "(^|\n)ld: warning: symbol \[`'\]\[^\n\]*' has differing sizes:" $text "" text
  39     regsub -all "(^|\n)\[ \t\]*\[\(\]file \[^\n\]* value=\[^\n\]*; file \[^\n\]* value=\[^\n\]*\[)\];" $text "" text
  40     regsub -all "(^|\n)\[ \t\]*\[^\n\]* definition taken" $text "" text
  41
  42     verbose "lto_prune_warns: exit: $text" 2
  43
  44     return $text
  45 }
  46
  47 # lto_init -- called at the start of each subdir of tests
  48
  49 proc lto_init { args } {
  50     global LTO_OPTIONS
  51
  52     if {[info exists args] && $args == "no-mathlib"} {
  53         global board_info
  54         global saved_mathlib
  55
  56         set dest [target_info name]
  57         if [board_info $dest exists mathlib] {
  58             set saved_mathlib [board_info $dest mathlib]
  59         }
  60         set board_info($dest,mathlib) " "
  61     }
  62
  63     # Each test is run with the compiler options from this list.
  64     # The default option lists can be overridden by LTO_OPTIONS="[list
  65     # {opts_1} {opts_2}... {opts_n}]" where opts_i are lists of options.
  66     # You can put this in the environment before site.exp is written or
  67     # add it to site.exp directly.
  68     if ![info exists LTO_OPTIONS] {
  69         if [check_linker_plugin_available] {
  70           set LTO_OPTIONS [list \
  71               {-O0 -flto -flto-partition=none -fuse-linker-plugin} \
  72               {-O2 -flto -flto-partition=none -fuse-linker-plugin -fno-fat-lto-objects } \
  73               {-O0 -flto -flto-partition=1to1 -fno-use-linker-plugin } \
  74               {-O2 -flto -flto-partition=1to1 -fno-use-linker-plugin } \
  75               {-O0 -flto -fuse-linker-plugin -fno-fat-lto-objects }     \
  76               {-O2 -flto -fuse-linker-plugin}   \
  77           ]
  78         } else {
  79           set LTO_OPTIONS [list \
  80               {-O0 -flto -flto-partition=none } \
  81               {-O2 -flto -flto-partition=none } \
  82               {-O0 -flto -flto-partition=1to1 } \
  83               {-O2 -flto -flto-partition=1to1 } \
  84               {-O0 -flto }      \
  85               {-O2 -flto}               \
  86           ]
  87         }
  88     }
  89 }
  90
  91 #
  92 # lto_finish -- called at the end of each subdir of tests if mathlib is
  93 #               changed.
  94 #
  95
  96 proc lto_finish { } {
  97     global board_info
  98     global saved_mathlib
  99
 100     set dest [target_info name]
 101     if [info exists saved_mathlib] {
 102         set board_info($dest,mathlib) $saved_mathlib
 103     } elseif [board_info $dest exists mathlib] {
 104         unset board_info($dest,mathlib)
 105     }
 106 }
 107
 108 # Subsets of tests can be selectively disabled by members of this list:
 109 #  - ATTRIBUTE: disable all tests using the __attribute__ extension,
 110 #  - COMPLEX: disable all tests using the complex types feature,
 111 #  - COMPLEX_INT: disable all tests using the complex integral types extension,
 112 #  - VA: disable all tests using the variable number of arguments feature,
 113 #  - VLA_IN_STRUCT: disable all tests using the variable-length arrays as
 114 #    structure members extension,
 115 #  - ZERO_ARRAY: disable all tests using the zero-sized arrays extension.
 116 # The default skip lists can be overriden by
 117 # LTO_SKIPS="[list {skip_1}...{skip_n}]"
 118 # where skip_i are skip identifiers.  You can put this in the environment
 119 # before site.exp is written or add it to site.exp directly.
 120 if ![info exists LTO_SKIPS] {
 121     set LTO_SKIPS [list {}]
 122 }
 123
 124 global lto_skip_list
 125 set lto_skip_list $LTO_SKIPS
 126
 127 load_lib dg.exp
 128 load_lib gcc-dg.exp
 129 load_lib gcc.exp
 130
 131 # lto-obj -- compile to an object file
 132 #
 133 # SOURCE is the source file
 134 # DEST is the object file
 135 # OPTALL is the list of compiler options to use with all tests
 136 # OPTFILE is the list of compiler options to use with this file
 137 # OPTSTR is the options to print with test messages
 138 # XFAILDATA is the xfail data to be passed to the compiler
 139 proc lto-obj { source dest optall optfile optstr xfaildata } {
 140     global testcase
 141     global tool
 142     global compiler_conditional_xfail_data
 143     global lto_skip_list
 144
 145     # Add the skip specifiers.
 146     foreach skip $lto_skip_list {
 147         if { ![string match $skip ""] } {
 148             lappend optall "-DSKIP_$skip"
 149         }
 150     }
 151
 152     # Set up the options for compiling this file.
 153     set options ""
 154     lappend options "additional_flags=$optall $optfile"
 155
 156     set compiler_conditional_xfail_data $xfaildata
 157
 158     # Allow C source files to mix freely with other languages
 159     if [ string match "*.c" $source ] then {
 160       set comp_output [gcc_target_compile "$source" "$dest" object $options]
 161     } else {
 162       set comp_output [${tool}_target_compile "$source" "$dest" object $options]
 163     }
 164     # Prune unimportant visibility warnings before checking output.
 165     set comp_output [lto_prune_warns $comp_output]
 166     ${tool}_check_compile "$testcase $dest assemble" $optstr $dest $comp_output
 167 }
 168
 169 # lto-link-and-maybe-run -- link the object files and run the executable
 170 # if compile_type is set to "run"
 171 #
 172 # TESTNAME is the mixture of object files to link
 173 # OBJLIST is the list of object files to link
 174 # DEST is the name of the executable
 175 # OPTALL is a list of compiler and linker options to use for all tests
 176 # OPTFILE is a list of compiler and linker options to use for this test
 177 # OPTSTR is the list of options to list in messages
 178 proc lto-link-and-maybe-run { testname objlist dest optall optfile optstr } {
 179     global testcase
 180     global tool
 181     global compile_type
 182     global board_info
 183
 184     # Check that all of the objects were built successfully.
 185     foreach obj [split $objlist] {
 186         if ![file_on_host exists $obj] then {
 187             unresolved "$testcase $testname link $optstr"
 188             unresolved "$testcase $testname execute $optstr"
 189             return
 190         }
 191     }
 192
 193     # Set up the options for linking this test.
 194     set options ""
 195     lappend options "additional_flags=$optall $optfile"
 196
 197     set target_board [target_info name]
 198     set relocatable 0
 199
 200     # Some LTO tests do relocatable linking. Some target boards set
 201     # a linker script which can't be used for relocatable linking.
 202     # Use the default linker script instead.
 203     if { [lsearch -exact [split "$optall $optfile"] "-r"] >= 0 } {
 204         set relocatable 1
 205     }
 206
 207     if { $relocatable } {
 208         set saved_ldscript [board_info $target_board ldscript]
 209         set board_info($target_board,ldscript) ""
 210     }
 211
 212     # Link the objects into an executable.
 213     set comp_output [${tool}_target_compile "$objlist" $dest executable \
 214                      "$options"]
 215
 216     if { $relocatable } {
 217         set board_info($target_board,ldscript) $saved_ldscript
 218     }
 219
 220     # Prune unimportant visibility warnings before checking output.
 221     set comp_output [lto_prune_warns $comp_output]
 222
 223     if ![${tool}_check_compile "$testcase $testname link" $optstr \
 224          $dest $comp_output] then {
 225         unresolved "$testcase $testname execute $optstr"
 226         return
 227     }
 228
 229     # Return if we only needed to link.
 230     if { ![string compare "link" $compile_type] } {
 231         return
 232     }
 233
 234     # Run the self-checking executable.
 235     if ![string match "*/*" $dest] then {
 236         set dest "./$dest"
 237     }
 238     set result [${tool}_load $dest "" ""]
 239     set status [lindex $result 0]
 240     if { $status == "pass" } then {
 241         file_on_host delete $dest
 242     }
 243     $status "$testcase $testname execute $optstr"
 244 }
 245
 246 # lto-get-options-main -- get target requirements for a test and
 247 # options for the primary source file and the test as a whole
 248 #
 249 # SRC is the full pathname of the primary source file.
 250 proc lto-get-options-main { src } {
 251     global compile_type
 252     global dg-extra-ld-options
 253     global dg-suppress-ld-options
 254
 255     set dg-extra-ld-options ""
 256     set dg-suppress-ld-options ""
 257
 258     # dg-options sets a variable called dg-extra-tool-flags.
 259     set dg-extra-tool-flags ""
 260
 261     # dg-options sets a variable called tool_flags.
 262     set tool_flags ""
 263
 264     # dg-require-* sets dg-do-what.
 265     upvar dg-do-what dg-do-what
 266     upvar dg-final-code dg-final-code
 267     set dg-final-code ""
 268
 269     set tmp [dg-get-options $src]
 270     verbose "getting options for $src: $tmp"
 271     foreach op $tmp {
 272         set cmd [lindex $op 0]
 273         verbose "cmd is $cmd"
 274         if { [string match "dg-skip-if" $cmd] \
 275              || [string match "dg-require-*" $cmd] } {
 276             set status [catch "$op" errmsg]
 277             if { $status != 0 } {
 278                 perror "src: $errmsg for \"$op\"\n"
 279                 unresolved "$src: $errmsg for \"$op\""
 280                 return
 281             }
 282         } elseif { [string match "dg-lto-options" $cmd] } {
 283             set op [lreplace $op 0 0 "dg-options"]
 284             set status [catch "$op" errmsg]
 285             if { $status != 0 } {
 286                 perror "src: $errmsg for \"$op\"\n"
 287                 unresolved "$src: $errmsg for \"$op\""
 288                 return
 289             }
 290         } elseif { ![string compare "dg-xfail-if" $cmd] \
 291                    || ![string compare "dg-options" $cmd] } {
 292             warning "lto.exp does not support $cmd in primary source file"
 293         } elseif { ![string compare "dg-lto-do" $cmd] } {
 294             if { [llength $op] > 3 } {
 295                 set kw [lindex [lindex $op 3] 0]
 296                 if [string match "target" $kw] {
 297                     perror "$src: dg-lto-do does not support \"target\""
 298                 } elseif [string match "xfail" $kw] {
 299                     perror "$src: dg-lto-do does not support \"xfail\""
 300                 } else {
 301                     perror "$src: dg-lto-do takes a single argument"
 302                 }
 303             }
 304             set dgdo [lindex $op 2]
 305             verbose "dg-lto-do command for \"$op\" is $dgdo"
 306             if { ![string compare "assemble" $dgdo] } {
 307                 set compile_type "assemble"
 308             } elseif { ![string compare "run" $dgdo] } {
 309                 set compile_type "run"
 310             } elseif { ![string compare "link" $dgdo] } {
 311                 set compile_type "link"
 312             } else {
 313                 warning "lto.exp does not support dg-lto-do $dgdo"
 314             }
 315         } elseif { ![string compare "dg-extra-ld-options" $cmd] } {
 316             if { [llength $op] > 4 } {
 317                 error "[lindex $op 0]: too many arguments"
 318             } else {
 319                 if { [llength $op] == 3
 320                      || ([llength $op] > 3
 321                          && [dg-process-target [lindex $op 3]] == "S") } {
 322                     set dg-extra-ld-options [lindex $op 2]
 323                     verbose \
 324                         "dg-extra-ld-options for main is ${dg-extra-ld-options}"
 325                 }
 326             }
 327         } elseif { ![string compare "dg-suppress-ld-options" $cmd] } {
 328             if { [llength $op] > 4 } {
 329                 error "[lindex $op 0]: too many arguments"
 330             } else {
 331                 if { [llength $op] == 3
 332                      || ([llength $op] > 3
 333                          && [dg-process-target [lindex $op 3]] == "S") } {
 334                     set dg-suppress-ld-options [lindex $op 2]
 335                     verbose \
 336                         "dg-suppress-ld-options for main is ${dg-suppress-ld-options}"
 337                 }
 338             }
 339         } elseif { ![string compare "dg-final" $cmd] } {
 340             if { [llength $op] > 3 } {
 341                 error "[lindex $op 0]: too many arguments"
 342             } else {
 343                 append dg-final-code "[lindex $op 2]\n"
 344             }
 345         } else {
 346             # Ignore unrecognized dg- commands, but warn about them.
 347             warning "lto.exp does not support $cmd"
 348         }
 349     }
 350
 351     # Return flags to use for compiling the primary source file and for
 352     # linking.
 353     verbose "dg-extra-tool-flags for main is ${dg-extra-tool-flags}"
 354     return ${dg-extra-tool-flags}
 355 }
 356
 357
 358 # lto-get-options -- get special tool flags to use for a secondary
 359 # source file
 360 #
 361 # SRC is the full pathname of the source file.
 362 # The result is a list of options to use.
 363 #
 364 # This code is copied from proc dg-test in dg.exp from DejaGNU.
 365 proc lto-get-options { src } {
 366     # dg-options sets a variable called dg-extra-tool-flags.
 367     set dg-extra-tool-flags ""
 368
 369     # dg-xfail-if sets compiler_conditional_xfail_data.
 370     global compiler_conditional_xfail_data
 371     set compiler_conditional_xfail_data ""
 372
 373     # dg-xfail-if needs access to dg-do-what.
 374     upvar dg-do-what dg-do-what
 375
 376     set tmp [dg-get-options $src]
 377     foreach op $tmp {
 378         set cmd [lindex $op 0]
 379         if { ![string compare "dg-options" $cmd] \
 380              || ![string compare "dg-xfail-if" $cmd] } {
 381             set status [catch "$op" errmsg]
 382             if { $status != 0 } {
 383                 perror "src: $errmsg for \"$op\"\n"
 384                 unresolved "$src: $errmsg for \"$op\""
 385                 return
 386             }
 387         } elseif { [string match "dg-require-*" $cmd] } {
 388             warning "lto.exp does not support $cmd in secondary source files"
 389         } else {
 390             # Ignore unrecognized dg- commands, but warn about them.
 391             warning "lto.exp does not support $cmd in secondary source files"
 392         }
 393     }
 394
 395     return ${dg-extra-tool-flags}
 396 }
 397
 398 # lto-execute -- compile multi-file tests
 399 #
 400 # SRC1 is the full pathname of the main file of the testcase.
 401 # SID identifies a test suite in the names of temporary files.
 402 proc lto-execute { src1 sid } {
 403     global srcdir tmpdir
 404     global lto_option_list
 405     global tool
 406     global verbose
 407     global testcase
 408     global gluefile
 409     global compiler_conditional_xfail_data
 410     global dg-do-what-default
 411     global compile_type
 412     global dg-extra-ld-options
 413     global dg-suppress-ld-options
 414     global LTO_OPTIONS
 415     global dg-final-code
 416     global testname_with_flags
 417
 418     # Get extra flags for this test from the primary source file, and
 419     # process other dg-* options that this suite supports.  Warn about
 420     # unsupported flags.
 421     verbose "lto-execute: $src1" 1
 422     set compile_type "run"
 423     set dg-do-what [list ${dg-do-what-default} "" P]
 424     set extra_flags(0) [lto-get-options-main $src1]
 425     set compile_xfail(0) ""
 426
 427     # If the main file defines dg-options, those flags are used to
 428     # overwrite the default lto_option_list taken from LTO_OPTIONS.
 429     if { [string length $extra_flags(0)] > 0 } {
 430         set lto_option_list $extra_flags(0)
 431         set extra_flags(0) ""
 432     } else {
 433         set lto_option_list $LTO_OPTIONS
 434     }
 435
 436     # Set up the names of the other source files.
 437     set dir [file dirname $src1]
 438     set base [file rootname $src1]
 439     set base [string range $base [string length $dir] end]
 440     regsub "_0" $base "" base
 441     regsub "/" $base "" base
 442     set src_list $src1
 443     set i 1
 444     set done 0
 445     while { !$done } {
 446         set names [glob -nocomplain -types f -- "${dir}/${base}_${i}.*"]
 447         if { [llength ${names}] > 1 } {
 448             warning "lto-execute: more than one file matched ${dir}/${base}_${i}.*"
 449         }
 450         if { [llength ${names}] == 1 } {
 451             lappend src_list [lindex ${names} 0]
 452             incr i
 453         } else {
 454             set num_srcs ${i}
 455             set done 1
 456         }
 457     }
 458
 459     # Use the dg-options mechanism to specify extra flags for each
 460     # of the secondary files.
 461     # The extra flags in each file are used to compile that file, and the
 462     # extra flags in *_0.* are also used for linking.
 463     verbose "\tsrc_list is: $src_list"
 464     for {set i 1} {$i < $num_srcs} {incr i} {
 465         set extra_flags($i) [lto-get-options [lindex $src_list $i]]
 466         set compile_xfail($i) $compiler_conditional_xfail_data
 467     }
 468
 469     # Define the names of the object files.
 470     set obj_list ""
 471     for {set i 0} {$i < $num_srcs} {incr i} {
 472         lappend obj_list "${sid}_${base}_${i}.o"
 473     }
 474
 475     # Get the base name of this test, for use in messages.
 476     set testcase [lindex ${src_list} 0]
 477
 478     # Remove the $srcdir and $tmpdir prefixes from $src1.  (It would
 479     # be possible to use "regsub" here, if we were careful to escape
 480     # all regular expression characters in $srcdir and $tmpdir, but
 481     # that would be more complicated that this approach.)
 482     if {[string first "$srcdir/" "${testcase}"] == 0} {
 483         set testcase [string range "${testcase}" [string length "$srcdir/"] end]
 484     }
 485     if {[string first "$tmpdir/" "$testcase"] == 0} {
 486         set testcase [string range "$testcase" [string length "$tmpdir/"] end]
 487         set testcase "tmpdir-$testcase"
 488     }
 489     # If we couldn't rip $srcdir out of `src1' then just do the best we can.
 490     # The point is to reduce the unnecessary noise in the logs.  Don't strip
 491     # out too much because different testcases with the same name can confuse
 492     # `test-tool'.
 493     if [string match "/*" $testcase] then {
 494         set testcase "[file tail [file dirname $src1]]/[file tail $src1]"
 495     }
 496
 497     # Check whether this test is supported for this target.
 498     if { [lindex ${dg-do-what} 1 ] == "N" } {
 499         unsupported "$testcase"
 500         verbose "$testcase not supported on this target, skipping it" 3
 501         return
 502     }
 503     # Should be safe for non-fortran too but be paranoid..
 504     if {$sid eq "f_lto"} {
 505         list-module-names $src_list
 506     }
 507     regsub "_0.*" $testcase "" testcase
 508
 509     # Set up the base name of executable files so they'll be unique.
 510     regsub -all "\[./\]" $testcase "-" execbase
 511
 512     # Loop through all of the option lists used for this test.
 513     set count 0
 514     foreach option $lto_option_list {
 515         verbose "Testing $testcase, $option"
 516
 517         # There's a unique name for each executable we generate.
 518         set execname "${execbase}-${count}1.exe"
 519         incr count
 520
 521         file_on_host delete $execname
 522
 523         # Compile pieces with the compiler under test.
 524         set i 0
 525         foreach src $src_list obj $obj_list {
 526             lto-obj $src $obj $option $extra_flags($i) $option \
 527                     $compile_xfail($i)
 528             incr i
 529         }
 530
 531         # Link (using the compiler under test), run, and clean up tests.
 532         if { ![string compare "run" $compile_type] \
 533              || ![string compare "link" $compile_type] } {
 534
 535             # Filter out any link options we were asked to suppress.
 536             set reduced {}
 537             foreach x [split $option] {
 538               if {[lsearch ${dg-suppress-ld-options} $x] == -1} {
 539                 lappend reduced $x
 540               }
 541             }
 542             set filtered [join $reduced " "]
 543
 544             lto-link-and-maybe-run \
 545                     "[lindex $obj_list 0]-[lindex $obj_list end]" \
 546                     $obj_list $execname $filtered ${dg-extra-ld-options} \
 547                     $filtered
 548         }
 549
 550
 551         # Are there any further tests to perform?
 552         # Note that if the program has special run-time requirements, running
 553         # of the program can be delayed until here.  Ditto for other situations.
 554         # It would be a bit cumbersome though.
 555
 556         if ![string match ${dg-final-code} ""] {
 557             regsub -all "\\\\(\[{}\])" ${dg-final-code} "\\1" dg-final-code
 558             # Note that the use of `args' here makes this a varargs proc.
 559             proc dg-final-proc { args } ${dg-final-code}
 560             verbose "Running dg-final tests." 3
 561             verbose "dg-final-proc:\n[info body dg-final-proc]" 4
 562             if [catch "dg-final-proc $src1" errmsg] {
 563                 perror "$src1: error executing dg-final: $errmsg"
 564                 # ??? The call to unresolved here is necessary to clear
 565                 # `errcnt'.  What we really need is a proc like perror that
 566                 # doesn't set errcnt.  It should also set exit_status to 1.
 567                 unresolved "$src1: error executing dg-final: $errmsg"
 568             }
 569         }
 570
 571         # Clean up object files.
 572         set files [glob -nocomplain ${sid}_*.o]
 573         if { $files != "" } {
 574             foreach objfile $files {
 575                 if { ![info exists gluefile] || $objfile != $gluefile } {
 576                     eval "file_on_host delete $objfile"
 577                 }
 578             }
 579         }
 580
 581         # Clean up after -save-temps.  The LTO tests don't use dg-test, so
 582         # testname-for-summary needs to be defined explicitly for each
 583         # file that needs to be removed.
 584         set testname_with_flags $execname
 585
 586         eval "cleanup-saved-temps"
 587
 588         for {set i 0} {$i < $num_srcs} {incr i} {
 589             set testname_with_flags "${base}_${i}"
 590             eval "cleanup-saved-temps"
 591             set testname_with_flags "${sid}_${base}_${i}"
 592             eval "cleanup-saved-temps"
 593         }
 594
 595         unset testname_with_flags
 596
 597         if { ![string compare "run" $compile_type] \
 598              || ![string compare "link" $compile_type] } {
 599             file_on_host delete $execname
 600         }
 601         # Should be safe for non-fortran too but be paranoid..
 602         if {$sid eq "f_lto"} {
 603             cleanup-modules ""
 604         }
 605     }
 606 }
 607
 608 # Utility for scanning a symbol in the final executable, invoked via dg-final.
 609 # Call pass if pattern is present, otherwise fail.
 610 #
 611 # Argument 0 is the regexp to match.
 612 # Argument 1 handles expected failures and the like
 613 proc scan-symbol { args } {
 614     global nm
 615     global base_dir
 616     upvar 2 execname execname
 617
 618     if { [llength $args] >= 2 } {
 619         switch [dg-process-target [lindex $args 1]] {
 620             "S" { }
 621             "N" { return }
 622             "F" { setup_xfail "*-*-*" }
 623             "P" { }
 624         }
 625     }
 626
 627     # Find nm like we find g++ in g++.exp.
 628     if ![info exists nm]  {
 629         set nm [findfile $base_dir/../../../binutils/nm \
 630                 $base_dir/../../../binutils/nm \
 631                 [findfile $base_dir/../../nm $base_dir/../../nm \
 632                       [findfile $base_dir/nm $base_dir/nm \
 633                        [transform nm]]]]
 634         verbose -log "nm is $nm"
 635     }
 636
 637     set output_file "[glob -nocomplain $execname]"
 638     if { $output_file == "" } {
 639         fail "scan-symbol $args: dump file does not exist"
 640         return
 641     }
 642
 643     set fd [open "| $nm $output_file" r]
 644     set text [read $fd]
 645     close $fd
 646
 647     if [regexp -- [lindex $args 0] $text] {
 648         pass "scan-symbol $args"
 649     } else {
 650         fail "scan-symbol $args"
 651     }
 652 }
 653
 654 # Call pass if object readelf is ok, otherwise fail.
 655 # example: /* { dg-final { object-readelf Tag_ABI_enum_size int} } */
 656 proc object-readelf { args } {
 657     global readelf
 658     global base_dir
 659     upvar 2 execname execname
 660
 661     if { [llength $args] < 2 } {
 662         error "object-readelf: too few arguments"
 663         return
 664     }
 665     if { [llength $args] > 3 } {
 666         error "object-readelf: too many arguments"
 667         return
 668     }
 669     if { [llength $args] >= 3 } {
 670         switch [dg-process-target [lindex $args 2]] {
 671             "S" { }
 672             "N" { return }
 673             "F" { setup_xfail "*-*-*" }
 674             "P" { }
 675         }
 676     }
 677
 678     # Find size like we find g++ in g++.exp.
 679     if ![info exists readelf]  {
 680         set readelf [findfile $base_dir/../../../binutils/readelf \
 681                 $base_dir/../../../binutils/readelf \
 682                 [findfile $base_dir/../../readelf $base_dir/../../readelf \
 683                 [findfile $base_dir/readelf $base_dir/readelf \
 684                 [transform readelf]]]]
 685         verbose -log "readelf is $readelf"
 686     }
 687
 688     set what [lindex $args 0]
 689     set with [lindex $args 1]
 690
 691     if ![file_on_host exists $execname] {
 692         verbose -log "$execname does not exist"
 693         unresolved "object-readelf $what "
 694         return
 695     }
 696
 697     set output [remote_exec host "$readelf -A" "$execname"]
 698     set status [lindex $output 0]
 699     if { $status != 0 } {
 700         verbose -log "object-readelf: $readelf failed"
 701         unresolved "object-readelf $what $execname"
 702         return
 703     }
 704
 705     set text [lindex $output 1]
 706     set lines [split $text "\n"]
 707
 708     set done 0
 709     set i 0
 710     while { !$done } {
 711         set line_tex [lindex $lines $i]
 712         if { [llength ${line_tex}] > 1} {
 713             incr i
 714             if [regexp -- $what $line_tex] {
 715                 set match [regexp -- $with $line_tex]
 716                 set done 1
 717             }
 718         } else {
 719             set done 1
 720         }
 721     }
 722
 723     verbose -log "$what size is $with;"
 724     if { $match == 1 } {
 725         pass "object-readelf $what size is correct."
 726     } else {
 727         fail "object-readelf $what size is incorrect."
 728     }
 729 }
 730
 731