gdb/testsuite/gdb.guile/scm-value.exp

   1 # Copyright (C) 2008-2014 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 this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # This file is part of the GDB testsuite.
  17 # It tests the mechanism exposing values to Guile.
  18
  19 load_lib gdb-guile.exp
  20
  21 standard_testfile
  22
  23 # Build inferior to language specification.
  24 # LANG is one of "c" or "c++".
  25 proc build_inferior {exefile lang} {
  26     global srcdir subdir srcfile testfile hex
  27
  28     # Use different names for .o files based on the language.
  29     # For Fission, the debug info goes in foo.dwo and we don't want,
  30     # for example, a C++ compile to clobber the dwo of a C compile.
  31     # ref: http://gcc.gnu.org/wiki/DebugFission
  32     switch ${lang} {
  33         "c" { set filename ${testfile}.o }
  34         "c++" { set filename ${testfile}-cxx.o }
  35     }
  36     set objfile [standard_output_file $filename]
  37
  38     if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${objfile}" object "debug $lang"] != ""
  39          || [gdb_compile "${objfile}" "${exefile}" executable "debug $lang"] != "" } {
  40         untested "Couldn't compile ${srcfile} in $lang mode"
  41         return -1
  42     }
  43     return 0
  44 }
  45
  46 proc test_value_in_inferior {} {
  47     global gdb_prompt
  48     global testfile
  49
  50     gdb_breakpoint [gdb_get_line_number "break to inspect struct and union"]
  51
  52     gdb_continue_to_breakpoint "break to inspect struct and union"
  53
  54     # Just get inferior variable s in the value history, available to guile.
  55     gdb_test "print s" "= {a = 3, b = 5}" ""
  56
  57     gdb_scm_test_silent_cmd "gu (define s (history-ref 0))" "set s"
  58
  59     gdb_test "gu (print (value-field s \"a\"))" \
  60         "= 3" "access element inside struct using string name"
  61
  62     # Append value in the value history.
  63     gdb_scm_test_silent_cmd "gu (define i (history-append! (make-value 42)))" \
  64         "append 42"
  65
  66     gdb_test "gu i" "\[0-9\]+"
  67     gdb_test "gu (history-ref i)" "#<gdb:value 42>"
  68     gdb_test "p \$" "= 42"
  69
  70     # Verify the recorded history value survives a gc.
  71     gdb_test_no_output "guile (gc)"
  72     gdb_test "p \$\$" "= 42"
  73
  74     # Make sure 'history-append!' rejects non-value objects.
  75     gdb_test "gu (history-append! 123)" \
  76         "ERROR:.* Wrong type argument.*" "history-append! type error"
  77
  78     # Test dereferencing the argv pointer.
  79
  80     # Just get inferior variable argv the value history, available to guile.
  81     gdb_test "print argv" "= \\(char \\*\\*\\) 0x.*" ""
  82
  83     gdb_scm_test_silent_cmd "gu (define argv (history-ref 0))" \
  84         "set argv"
  85     gdb_scm_test_silent_cmd "gu (define arg0 (value-dereference argv))" \
  86         "set arg0"
  87
  88     # Check that the dereferenced value is sane.
  89     if { ! [target_info exists noargs] } {
  90         gdb_test "gu (print arg0)" \
  91             "0x.*$testfile\"" "verify dereferenced value"
  92     }
  93
  94     # Smoke-test value-optimized-out?.
  95     gdb_test "gu (print (value-optimized-out? arg0))" \
  96         "= #f" "Test value-optimized-out?"
  97
  98     # Test address attribute.
  99     gdb_test "gu (print (value-address arg0))" \
 100         "= 0x\[\[:xdigit:\]\]+" "Test address attribute"
 101     # Test address attribute is #f in a non-addressable value.
 102     gdb_test "gu (print (value-address (make-value 42)))" \
 103         "= #f" "Test address attribute in non-addressable value"
 104
 105     # Test displaying a variable that is temporarily at a bad address.
 106     # But if we can examine what's at memory address 0, then we'll also be
 107     # able to display it without error.  Don't run the test in that case.
 108     set can_read_0 [is_address_zero_readable]
 109
 110     # Test memory error.
 111     set test "parse_and_eval with memory error"
 112     if {$can_read_0} {
 113         untested $test
 114     } else {
 115         gdb_test "gu (print (parse-and-eval \"*(int*)0\"))" \
 116             "ERROR: Cannot access memory at address 0x0.*" $test
 117     }
 118
 119     # Test Guile lazy value handling
 120     set test "memory error and lazy values"
 121     if {$can_read_0} {
 122         untested $test
 123     } else {
 124         gdb_test_no_output "gu (define inval (parse-and-eval \"*(int*)0\"))"
 125         gdb_test "gu (print (value-lazy? inval))" \
 126             "#t"
 127         gdb_test "gu (define inval2 (value-add inval 1))" \
 128             "ERROR: Cannot access memory at address 0x0.*" $test
 129         gdb_test "gu (value-fetch-lazy! inval))" \
 130             "ERROR: Cannot access memory at address 0x0.*" $test
 131     }
 132     gdb_test_no_output "gu (define argc-lazy (parse-and-eval \"argc\"))"
 133     gdb_test_no_output "gu (define argc-notlazy (parse-and-eval \"argc\"))"
 134     gdb_test_no_output "gu (value-fetch-lazy! argc-notlazy)"
 135     gdb_test "gu (print (value-lazy? argc-lazy))" "= #t"
 136     gdb_test "gu (print (value-lazy? argc-notlazy))" "= #f"
 137     gdb_test "print argc" "= 1" "sanity check argc"
 138     gdb_test "gu (print (value-lazy? argc-lazy))" "= #t"
 139     gdb_test_no_output "set argc=2"
 140     gdb_test "gu (print argc-notlazy)" "= 1"
 141     gdb_test "gu (print argc-lazy)" "= 2"
 142     gdb_test "gu (print (value-lazy? argc-lazy))" "= #f"
 143
 144     # Test string fetches, both partial and whole.
 145     gdb_test "print st" "\"divide et impera\""
 146     gdb_scm_test_silent_cmd "gu (define st (history-ref 0))" \
 147         "inf: get st value from history"
 148     gdb_test "gu (print (value->string st))" \
 149         "= divide et impera"  "Test string with no length"
 150     gdb_test "gu (print (value->string st #:length -1))" \
 151         "= divide et impera" "Test string (length = -1) is all of the string"
 152     gdb_test "gu (print (value->string st #:length 6))" \
 153         "= divide"
 154     gdb_test "gu (print (string-append \"---\" (value->string st #:length 0) \"---\"))" \
 155         "= ------" "Test string (length = 0) is empty"
 156     gdb_test "gu (print (string-length (value->string st #:length 0)))" \
 157         "= 0" "Test length is 0"
 158
 159     # Fetch a string that has embedded nulls.
 160     gdb_test "print nullst" "\"divide\\\\000et\\\\000impera\".*"
 161     gdb_scm_test_silent_cmd "gu (define nullst (history-ref 0))" \
 162         "inf: get nullst value from history"
 163     gdb_test "gu (print (value->string nullst))" \
 164         "divide" "Test string to first null"
 165     gdb_scm_test_silent_cmd "gu (set! nullst (value->string nullst #:length 9))" \
 166         "get string beyond null"
 167     gdb_test "gu (print nullst)" \
 168         "= divide\\\\000et"
 169 }
 170
 171 proc test_strings {} {
 172     gdb_test "gu (make-value \"test\")" "#<gdb:value \"test\">" "make string"
 173
 174     # Test string conversion errors.
 175     set save_charset [get_target_charset]
 176     gdb_test_no_output "set target-charset UTF-8"
 177
 178     gdb_test_no_output "gu (set-port-conversion-strategy! #f 'error)"
 179     gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\"))" \
 180         "ERROR.*decoding-error.*" \
 181         "value->string with default #:errors = 'error"
 182
 183     # There is no 'escape strategy for C->SCM string conversions, but it's
 184     # still a legitimate value for %default-port-conversion-strategy.
 185     # GDB handles this by, umm, substituting 'substitute.
 186     # Use this case to also handle "#:errors #f" which explicitly says
 187     # "use %default-port-conversion-strategy".
 188     gdb_test_no_output "gu (set-port-conversion-strategy! #f 'escape)"
 189     gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\" #:errors #f))" \
 190         "= \[?\]{3}" "value->string with default #:errors = 'escape"
 191
 192     # This is last in the default conversion tests so that
 193     # %default-port-conversion-strategy ends up with the default value.
 194     gdb_test_no_output "gu (set-port-conversion-strategy! #f 'substitute)"
 195     gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\"))" \
 196         "= \[?\]{3}" "value->string with default #:errors = 'substitute"
 197
 198     gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\" #:errors 'error))" \
 199         "ERROR.*decoding-error.*" "value->string #:errors 'error"
 200     gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\" #:errors 'substitute))" \
 201         "= \[?\]{3}" "value->string #:errors 'substitute"
 202     gdb_test "gu (print (value->string (make-value \"abc\") #:errors \"foo\"))" \
 203         "ERROR.*invalid error kind.*" "bad value for #:errors"
 204
 205     gdb_test_no_output "set target-charset $save_charset" \
 206         "restore target-charset"
 207 }
 208
 209 proc test_lazy_strings {} {
 210     global hex
 211
 212     gdb_test "print sptr" "\"pointer\""
 213     gdb_scm_test_silent_cmd "gu (define sptr (history-ref 0))" \
 214         "lazy strings: get sptr value from history"
 215
 216     gdb_scm_test_silent_cmd "gu (define lstr (value->lazy-string sptr))" \
 217         "Aquire lazy string"
 218     gdb_test "gu (print (lazy-string-type lstr))" \
 219         "= const char \*." "Test lazy-string type name equality"
 220     gdb_test "gu (print (value-type sptr))" \
 221         "= const char \*." "Test string type name equality"
 222     gdb_test "print sn" "0x0"
 223     gdb_scm_test_silent_cmd "gu (define snptr (history-ref 0))" \
 224         "lazy strings: get snptr value from history"
 225     gdb_test "gu (define snstr (value->lazy-string snptr #:length 5))" \
 226         ".*cannot create a lazy string with address.*" "Test lazy string"
 227     gdb_scm_test_silent_cmd "gu (define snstr (value->lazy-string snptr #:length 0))" \
 228         "Successfully create a lazy string"
 229     gdb_test "gu (print (lazy-string-length snstr))" \
 230         "= 0" "Test lazy string length"
 231     gdb_test "gu (print (lazy-string-address snstr))" \
 232         "= 0" "Test lazy string address"
 233 }
 234
 235 proc test_inferior_function_call {} {
 236     global gdb_prompt hex decimal
 237
 238     # Correct inferior call without arguments.
 239     gdb_test "p/x fp1" "= $hex.*"
 240     gdb_scm_test_silent_cmd "gu (define fp1 (history-ref 0))" \
 241         "get fp1 value from history"
 242     gdb_scm_test_silent_cmd "gu (set! fp1 (value-dereference fp1))" \
 243         "dereference fp1"
 244     gdb_test "gu (print (value-call fp1 '()))" \
 245         "= void"
 246
 247     # Correct inferior call with arguments.
 248     gdb_test "p/x fp2" "= $hex.*"
 249     gdb_scm_test_silent_cmd "gu (define fp2 (history-ref 0))" \
 250         "get fp2 value from history"
 251     gdb_scm_test_silent_cmd "gu (set! fp2 (value-dereference fp2))" \
 252         "dereference fp2"
 253     gdb_test "gu (print (value-call fp2 (list 10 20)))" \
 254         "= 30"
 255
 256     # Incorrect to call an int value.
 257     gdb_test "p i" "= $decimal.*"
 258     gdb_scm_test_silent_cmd "gu (define i (history-ref 0))" \
 259         "inf call: get i value from history"
 260     gdb_test "gu (print (value-call i '()))" \
 261         "ERROR: .*: Wrong type argument in position 1 \\(expecting function \\(value of TYPE_CODE_FUNC\\)\\): .*"
 262
 263     # Incorrect number of arguments.
 264     gdb_test "p/x fp2" "= $hex.*"
 265     gdb_scm_test_silent_cmd "gu (define fp3 (history-ref 0))" \
 266         "get fp3 value from history"
 267     gdb_scm_test_silent_cmd "gu (set! fp3 (value-dereference fp3))" \
 268         "dereference fp3"
 269     gdb_test "gu (print (value-call fp3 (list 10)))" \
 270         "ERROR: Too few arguments in function call.*"
 271 }
 272
 273 proc test_value_after_death {} {
 274     # Construct a type while the inferior is still running.
 275     gdb_scm_test_silent_cmd "gu (define ptrtype (lookup-type \"PTR\"))" \
 276         "create PTR type"
 277
 278     # Kill the inferior and remove the symbols.
 279     gdb_test "kill" "" "kill the inferior" \
 280         "Kill the program being debugged. .y or n. $" \
 281         "y"
 282     gdb_test "file" "" "Discard the symbols" \
 283         "Discard symbol table from.*y or n. $" \
 284         "y"
 285
 286     # First do a garbage collect to delete anything unused.  PR 16612.
 287     gdb_scm_test_silent_cmd "gu (gc)" "garbage collect"
 288
 289     # Now create a value using that type.  Relies on arg0, created by
 290     # test_value_in_inferior.
 291     gdb_scm_test_silent_cmd "gu (define castval (value-cast arg0 (type-pointer ptrtype)))" \
 292         "cast arg0 to PTR"
 293
 294     # Make sure the type is deleted.
 295     gdb_scm_test_silent_cmd "gu (set! ptrtype #f)" \
 296         "delete PTR type"
 297
 298     # Now see if the value's type is still valid.
 299     gdb_test "gu (print (value-type castval))" \
 300         "= PTR ." "print value's type"
 301 }
 302
 303 # Regression test for invalid subscript operations.  The bug was that
 304 # the type of the value was not being checked before allowing a
 305 # subscript operation to proceed.
 306
 307 proc test_subscript_regression {exefile lang} {
 308     # Start with a fresh gdb.
 309     clean_restart ${exefile}
 310
 311     if ![gdb_guile_runto_main ] {
 312         fail "Can't run to main"
 313         return
 314     }
 315
 316     if {$lang == "c++"} {
 317         gdb_breakpoint [gdb_get_line_number "break to inspect pointer by reference"]
 318         gdb_continue_to_breakpoint "break to inspect pointer by reference"
 319
 320         gdb_scm_test_silent_cmd "print rptr_int" \
 321             "Obtain address"
 322         gdb_scm_test_silent_cmd "gu (define rptr (history-ref 0))" \
 323             "set rptr"
 324         gdb_test "gu (print (value-subscript rptr 0))" \
 325             "= 2" "Check pointer passed as reference"
 326
 327         # Just the most basic test of dynamic_cast -- it is checked in
 328         # the C++ tests.
 329         gdb_test "gu (print (value->bool (value-dynamic-cast (parse-and-eval \"base\") (type-pointer (lookup-type \"Derived\")))))" \
 330             "= #t"
 331
 332         # Likewise.
 333         gdb_test "gu (print (value-dynamic-type (parse-and-eval \"base\")))" \
 334             "= Derived \[*\]"
 335         gdb_test "gu (print (value-dynamic-type (parse-and-eval \"base_ref\")))" \
 336             "= Derived \[&\]"
 337         # A static type case.
 338         gdb_test "gu (print (value-dynamic-type (parse-and-eval \"5\")))" \
 339             "= int"
 340     }
 341
 342     gdb_breakpoint [gdb_get_line_number "break to inspect struct and union"]
 343     gdb_continue_to_breakpoint "break to inspect struct and union"
 344
 345     gdb_scm_test_silent_cmd "gu (define intv (make-value 1))" \
 346         "Create int value for subscript test"
 347     gdb_scm_test_silent_cmd "gu (define stringv (make-value \"foo\"))" \
 348         "Create string value for subscript test"
 349
 350     # Try to access an int with a subscript.  This should fail.
 351     gdb_test "gu (print intv)" \
 352         "= 1" "Baseline print of an int Guile value"
 353     gdb_test "gu (print (value-subscript intv 0))" \
 354         "ERROR: Cannot subscript requested type.*" \
 355         "Attempt to access an integer with a subscript"
 356
 357     # Try to access a string with a subscript.  This should pass.
 358     gdb_test "gu (print stringv)" \
 359         "= \"foo\"" "Baseline print of a string Guile value"
 360     gdb_test "gu (print (value-subscript stringv 0))" \
 361         "= 102 'f'" "Attempt to access a string with a subscript"
 362
 363     # Try to access an int array via a pointer with a subscript.
 364     # This should pass.
 365     gdb_scm_test_silent_cmd "print p" "Build pointer to array"
 366     gdb_scm_test_silent_cmd "gu (define pointer (history-ref 0))" "set pointer"
 367     gdb_test "gu (print (value-subscript pointer 0))" \
 368         "= 1" "Access array via pointer with int subscript"
 369     gdb_test "gu (print (value-subscript pointer intv))" \
 370         "= 2" "Access array via pointer with value subscript"
 371
 372     # Try to access a single dimension array with a subscript to the
 373     # result.  This should fail.
 374     gdb_test "gu (print (value-subscript (value-subscript pointer intv) 0))" \
 375         "ERROR: Cannot subscript requested type.*" \
 376         "Attempt to access an integer with a subscript 2"
 377
 378     # Lastly, test subscript access to an array with multiple
 379     # dimensions.  This should pass.
 380     gdb_scm_test_silent_cmd "print {\"fu \",\"foo\",\"bar\"}" "Build array"
 381     gdb_scm_test_silent_cmd "gu (define marray (history-ref 0))" ""
 382     gdb_test "gu (print (value-subscript (value-subscript marray 1) 2))" \
 383         "o." "Test multiple subscript"
 384 }
 385
 386 # A few tests of gdb:parse-and-eval.
 387
 388 proc test_parse_and_eval {} {
 389     gdb_test "gu (print (parse-and-eval \"23\"))" \
 390         "= 23" "parse-and-eval constant test"
 391     gdb_test "gu (print (parse-and-eval \"5 + 7\"))" \
 392         "= 12" "parse-and-eval simple expression test"
 393     gdb_test "gu (raw-print (parse-and-eval \"5 + 7\"))" \
 394         "#<gdb:value 12>" "parse-and-eval type test"
 395 }
 396
 397 # Test that values are hashable.
 398 # N.B.: While smobs are hashable, the hash is really non-existent,
 399 # they all get hashed to the same value.  Guile may provide a hash function
 400 # for smobs in a future release.  In the meantime one should use a custom
 401 # hash table that uses gdb:hash-gsmob.
 402
 403 proc test_value_hash {} {
 404     gdb_test_multiline "Simple Guile value dictionary" \
 405         "guile" "" \
 406         "(define one (make-value 1))" "" \
 407         "(define two (make-value 2))" "" \
 408         "(define three (make-value 3))" "" \
 409         "(define vdict (make-hash-table 5))" "" \
 410         "(hash-set! vdict one \"one str\")" "" \
 411         "(hash-set! vdict two \"two str\")" "" \
 412         "(hash-set! vdict three \"three str\")" "" \
 413         "end"
 414     gdb_test "gu (print (hash-ref vdict one))" \
 415         "one str" "Test dictionary hash 1"
 416     gdb_test "gu (print (hash-ref vdict two))" \
 417         "two str" "Test dictionary hash 2"
 418     gdb_test "gu (print (hash-ref vdict three))" \
 419         "three str" "Test dictionary hash 3"
 420 }
 421
 422 # Build C version of executable.  C++ is built later.
 423 if { [build_inferior "${binfile}" "c"] < 0 } {
 424     return
 425 }
 426
 427 # Start with a fresh gdb.
 428 clean_restart ${binfile}
 429
 430 # Skip all tests if Guile scripting is not enabled.
 431 if { [skip_guile_tests] } { continue }
 432
 433 gdb_install_guile_utils
 434 gdb_install_guile_module
 435
 436 test_parse_and_eval
 437 test_value_hash
 438
 439 # The following tests require execution.
 440
 441 if ![gdb_guile_runto_main] {
 442     fail "Can't run to main"
 443     return
 444 }
 445
 446 test_value_in_inferior
 447 test_inferior_function_call
 448 test_strings
 449 test_lazy_strings
 450 test_value_after_death
 451
 452 # Test either C or C++ values.
 453
 454 test_subscript_regression "${binfile}" "c"
 455
 456 if ![skip_cplus_tests] {
 457     if { [build_inferior "${binfile}-cxx" "c++"] < 0 } {
 458         return
 459     }
 460     with_test_prefix "c++" {
 461         test_subscript_regression "${binfile}-cxx" "c++"
 462     }
 463 }