1# Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000 2# Free Software Foundation, Inc. 3 4# This program is free software; you can redistribute it and/or modify 5# it under the terms of the GNU General Public License as published by 6# the Free Software Foundation; either version 2 of the License, or 7# (at your option) any later version. 8# 9# This program is distributed in the hope that it will be useful, 10# but WITHOUT ANY WARRANTY; without even the implied warranty of 11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12# GNU General Public License for more details. 13# 14# You should have received a copy of the GNU General Public License 15# along with this program; if not, write to the Free Software 16# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 18# Please email any bugs, comments, and/or additions to this file to: 19# bug-gdb@prep.ai.mit.edu 20 21# This file was written by Fred Fish. (fnf@cygnus.com) 22 23if $tracelevel then { 24 strace $tracelevel 25} 26 27set prms_id 0 28set bug_id 0 29 30set testfile "watchpoint" 31set srcfile ${testfile}.c 32set binfile ${objdir}/${subdir}/${testfile} 33 34set wp_set 1 35 36if [get_compiler_info ${binfile}] { 37 return -1 38} 39 40if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { 41 gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail." 42} 43 44# Prepare for watchpoint tests by setting up two breakpoints and one 45# watchpoint. 46# 47# We use breakpoints at marker functions to get past all the startup code, 48# so we can get to the watchpoints in a reasonable amount of time from a 49# known starting point. 50# 51# For simplicity, so we always know how to reference specific breakpoints or 52# watchpoints by number, we expect a particular ordering and numbering of 53# each in the combined breakpoint/watchpoint table, as follows: 54# 55# Number What Where 56# 1 Breakpoint marker1() 57# 2 Breakpoint marker2() 58# 3 Watchpoint ival3 59 60proc initialize {} { 61 global gdb_prompt 62 global hex 63 global decimal 64 global srcfile 65 global wp_set 66 67 # Disable hardware watchpoints if necessary. 68 if [target_info exists gdb,no_hardware_watchpoints] { 69 gdb_test "set can-use-hw-watchpoints 0" "" "" 70 } 71 72 if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] { 73 return 0; 74 } 75 76 77 if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] { 78 return 0; 79 } 80 81 82 if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] { 83 return 0; 84 } 85 86 87 # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint 88 # before running can cause the inferior to croak on HP-UX 11.0 for 89 # reasons yet unknown, we've disabled the ability to set watches 90 # without a running inferior. Verify the restriction. 91 # 92 send_gdb "watch ival3\n" 93 gdb_expect { 94 -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" { 95 pass "set watchpoint on ival3" 96 } 97 -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" { 98 pass "set watchpoint on ival3" 99 set wp_set 0 100 return 1 101 } 102 timeout { 103 fail "(timeout) set watchpoint on ival3" 104 return 0 105 } 106 } 107 108 # "info watch" is the same as "info break" 109 110 if [gdb_test "info watch" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] { 111 return 0; 112 } 113 114 115 # After installing the watchpoint, we disable it until we are ready 116 # to use it. This allows the test program to run at full speed until 117 # we get to the first marker function. 118 119 if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] { 120 return 0; 121 } 122 123 124 return 1 125} 126 127# 128# Test simple watchpoint. 129# 130 131proc test_simple_watchpoint {} { 132 global gdb_prompt 133 global hex 134 global decimal 135 global wp_set 136 137 # Ensure that the watchpoint is disabled when we startup. 138 139 if { $wp_set } { 140 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] { 141 return 0; 142 } 143 } 144 145 146 # Run until we get to the first marker function. 147 148 gdb_run_cmd 149 set timeout 600 150 gdb_expect { 151 -re "Breakpoint 1, marker1 .*$gdb_prompt $" { 152 pass "run to marker1 in test_simple_watchpoint" 153 } 154 -re ".*$gdb_prompt $" { 155 fail "run to marker1 in test_simple_watchpoint" 156 return 157 } 158 timeout { 159 fail "run to marker1 in test_simple_watchpoint (timeout)" 160 return 161 } 162 } 163 164 if { !$wp_set } { 165 # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint 166 # before running can cause the inferior to croak on HP-UX 11.0 167 # for reasons yet unknown, we've disabled the ability to set 168 # watches without a running inferior. The following testpoints used 169 # to be in [initialize]. 170 # 171 send_gdb "watch ival3\n" 172 gdb_expect { 173 -re ".*\[Ww\]atchpoint 3: ival3\r\n$gdb_prompt $" { 174 pass "set watchpoint on ival3" 175 } 176 -re ".*$gdb_prompt $" { fail "set watchpoint on ival3" } 177 timeout { fail "set watchpoint on ival3 (timeout)" } 178 } 179 180 set wp_set 1 181 182 # "info watch" is the same as "info break" 183 184 send_gdb "info watch\n" 185 gdb_expect { 186 -re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3\r\n$gdb_prompt $" { 187 pass "watchpoint found in watchpoint/breakpoint table" 188 } 189 -re ".*$gdb_prompt $" { 190 fail "watchpoint found in watchpoint/breakpoint table" 191 } 192 timeout { 193 fail "watchpoint found in watchpoint/breakpoint table" 194 } 195 } 196 197 # After installing the watchpoint, we disable it until we are ready 198 # to use it. This allows the test program to run at full speed until 199 # we get to the first marker function. 200 201 send_gdb "disable 3\n" 202 gdb_expect { 203 -re "disable 3\[\r\n\]+$gdb_prompt $" { pass "disable watchpoint" } 204 -re ".*$gdb_prompt $" { fail "disable watchpoint" } 205 timeout { fail "disable watchpoint (timeout)" } 206 } 207 } 208 209 # After reaching the marker function, enable the watchpoint. 210 211 if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] { 212 return ; 213 } 214 215 216 gdb_test "break func1" "Breakpoint.*at.*" 217 gdb_test "set \$func1_breakpoint_number = \$bpnum" "" 218 219 gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \ 220 "continue to breakpoint at func1" 221 222 # Continue until the first change, from -1 to 0 223 224 send_gdb "cont\n" 225 gdb_expect { 226 -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" { 227 pass "watchpoint hit, first time" 228 } 229 -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" { 230 setup_xfail "m68*-*-*" 2597 231 fail "thought it hit breakpoint at func1 twice" 232 gdb_test "delete \$func1_breakpoint_number" "" 233 gdb_test "continue" "\ 234Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \ 235 "watchpoint hit, first time" 236 } 237 -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return } 238 timeout { fail "watchpoint hit, first time (timeout)" ; return } 239 eof { fail "watchpoint hit, first time (eof)" ; return } 240 } 241 242 # Check that the hit count is reported correctly 243 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1" 244 245 gdb_test "delete \$func1_breakpoint_number" "" 246 247 # Continue until the next change, from 0 to 1. 248 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time" 249 250 # Check that the hit count is reported correctly 251 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2" 252 253 # Continue until the next change, from 1 to 2. 254 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time" 255 256 # Check that the hit count is reported correctly 257 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3" 258 259 # Continue until the next change, from 2 to 3. 260 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time" 261 262 # Check that the hit count is reported correctly 263 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4" 264 265 # Continue until the next change, from 3 to 4. 266 # Note that this one is outside the loop. 267 268 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time" 269 270 # Check that the hit count is reported correctly 271 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5" 272 273 # Continue until we hit the finishing marker function. 274 # Make sure we hit no more watchpoints. 275 276 gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \ 277 "continue to marker2" 278 279 # Disable the watchpoint so we run at full speed until we exit. 280 281 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] { 282 return ; 283 } 284 285 286 # Run until process exits. 287 288 if [target_info exists gdb,noresults] { return } 289 290 gdb_continue_to_end "continue to exit in test_simple_watchpoint" 291} 292 293# Test disabling watchpoints. 294 295proc test_disabling_watchpoints {} { 296 global gdb_prompt 297 global binfile 298 global srcfile 299 global decimal 300 global hex 301 302 # "info watch" is the same as "info break" 303 gdb_test "info watch" "\[0-9\]+\[ \]*breakpoint.*marker1.*\r\n\[0-9\]+\[ \]*breakpoint.*marker2.*\r\n\[0-9]+\[ \]*.*watchpoint.*ival3\r\n\.*\[0-9\]+ times.*" "watchpoints found in watchpoint/breakpoint table" 304 305 # Ensure that the watchpoint is disabled when we startup. 306 307 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] { 308 return 0; 309 } 310 311 312 # Run until we get to the first marker function. 313 314 gdb_run_cmd 315 set timeout 600 316 gdb_expect { 317 -re "Breakpoint 1, marker1 .*$gdb_prompt $" { 318 pass "run to marker1 in test_disabling_watchpoints" 319 } 320 -re ".*$gdb_prompt $" { 321 fail "run to marker1 in test_disabling_watchpoints" 322 return 323 } 324 timeout { 325 fail "run to marker1 in test_disabling_watchpoints (timeout)" 326 return 327 } 328 } 329 330 # After reaching the marker function, enable the watchpoint. 331 332 if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] { 333 return ; 334 } 335 336 337 # Continue until the first change, from -1 to 0 338 # Don't check the old value, because on VxWorks the variable value 339 # will not have been reinitialized. 340 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time" 341 342 # Continue until the next change, from 0 to 1. 343 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, second time" 344 345 # Disable the watchpoint but leave breakpoints 346 347 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] { 348 return 0; 349 } 350 351 352 # Check watchpoint list, looking for the entry that confirms the 353 # watchpoint is disabled. 354 gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table" 355 356 # Continue until we hit the finishing marker function. 357 # Make sure we hit no more watchpoints. 358 gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \ 359 "disabled watchpoint skipped" 360 361 if [target_info exists gdb,noresults] { return } 362 363 gdb_continue_to_end "continue to exit in test_disabling_watchpoints" 364} 365 366# Test stepping and other mundane operations with watchpoints enabled 367proc test_stepping {} { 368 global gdb_prompt 369 370 if [runto marker1] then { 371 gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2" 372 373 # Well, let's not be too mundane. It should be a *bit* of a challenge 374 gdb_test "break func2 if 0" "Breakpoint.*at.*" 375 gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*" 376 377 gdb_test "p func1 ()" "= 73" \ 378 "calling function with watchpoint enabled" 379 380 # 381 # "finish" brings us back to main. 382 # On some targets (e.g. alpha) gdb will stop from the finish in midline 383 # of the marker1 call. This is due to register restoring code on 384 # the alpha and might be caused by stack adjustment instructions 385 # on other targets. In this case we will step once more. 386 # 387 388 send_gdb "finish\n" 389 gdb_expect { 390 -re "Run.*exit from.*marker1.* at" { 391 pass "finish from marker1" 392 } 393 default { fail "finish from marker1 (timeout)" ; return } 394 } 395 396 gdb_expect { 397 -re "marker1 \\(\\);.*$gdb_prompt $" { 398 send_gdb "step\n" 399 exp_continue 400 } 401 -re "func1 \\(\\);.*$gdb_prompt $" { 402 pass "back at main from marker1" 403 } 404 -re ".*$gdb_prompt $" { 405 fail "back at main from marker1" 406 } 407 default { fail "back at main from marker1 (timeout)" ; return } 408 } 409 410 gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp" 411 412 # Now test that "until" works. It's a bit tricky to test 413 # "until", because compilers don't always arrange the code 414 # exactly the same way, and we might get slightly different 415 # sequences of statements. But the following should be true 416 # (if not it is a compiler or a debugger bug): The user who 417 # does "until" at every statement of a loop should end up 418 # stepping through the loop once, and the debugger should not 419 # stop for any of the remaining iterations. 420 421 gdb_test "until" "ival1 = count.*" "until to ival1 assignment" 422 gdb_test "until" "ival3 = count.*" "until to ival3 assignment" 423 send_gdb "until\n" 424 gdb_expect { 425 -re "(for \\(count = 0|\}).*$gdb_prompt $" { 426 gdb_test "until" "ival1 = count; /. Outside loop ./" \ 427 "until out of loop" 428 } 429 -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" { 430 pass "until out of loop" 431 } 432 -re ".*$gdb_prompt $" { 433 fail "until out of loop" 434 } 435 default { fail "until out of loop (timeout)" ; return } 436 } 437 438 gdb_test "step" "ival2 = count.*" "step to ival2 assignment" 439 } 440} 441 442# Test stepping and other mundane operations with watchpoints enabled 443proc test_watchpoint_triggered_in_syscall {} { 444 global gdb_prompt 445 446 # These tests won't work without printf support. 447 if [gdb_skip_stdio_test "watchpoints triggered in syscall"] { 448 return; 449 } 450 # Run until we get to the first marker function. 451 set x 0 452 set y 0 453 set testname "Watch buffer passed to read syscall" 454 if [runto marker2] then { 455 gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]" 456 gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]" 457 gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]" 458 gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]" 459 gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]" 460 gdb_test "break marker4" ".*Breakpoint.*" 461 462 gdb_test "set doread = 1" "" 463 464 # If we send_gdb "123\n" before gdb has switched the tty, then it goes 465 # to gdb, not the inferior, and we lose. So that is why we have 466 # watchpoint.c prompt us, so we can wait for that prompt. 467 send_gdb "continue\n"; 468 gdb_expect { 469 -re "Continuing\\.\r\ntype stuff for buf now:" { 470 pass "continue to read" 471 } 472 default { 473 fail "continue to read"; 474 return ; 475 } 476 } 477 478 send_gdb "123\n" 479 gdb_expect { 480 -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue } 481 -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue } 482 -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue } 483 -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue } 484 -re ".*$gdb_prompt $" { pass "sent 123" } 485 timeout { fail "sent 123 (timeout)" } 486 } 487 488 # Examine the values in buf to see how many watchpoints we 489 # should have printed. 490 send_gdb "print buf\[0\]\n" 491 gdb_expect { 492 -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"} 493 -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"} 494 -re ".*$gdb_prompt $" { fail "print buf\[0\]"} 495 default { fail "print buf\[0\]"} 496 } 497 send_gdb "print buf\[1\]\n" 498 gdb_expect { 499 -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"} 500 -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"} 501 -re ".*$gdb_prompt $" { fail "print buf\[1\]"} 502 default { fail "print buf\[1\]"} 503 } 504 send_gdb "print buf\[2\]\n" 505 gdb_expect { 506 -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"} 507 -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"} 508 -re ".*$gdb_prompt $" { fail "print buf\[2\]"} 509 default { fail "print buf\[2\]"} 510 } 511 send_gdb "print buf\[3\]\n" 512 gdb_expect { 513 -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"} 514 -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"} 515 -re ".*$gdb_prompt $" { fail "print buf\[3\]" } 516 default { fail "print buf\[3\]" } 517 } 518 519 # Did we find what we were looking for? If not, flunk it. 520 if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"} 521 522 # Continue until we hit the finishing marker function. 523 # Make sure we hit no more watchpoints. 524 gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \ 525 "continue to marker4" 526 527 # Disable everything so we can finish the program at full speed 528 gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall" 529 530 if [target_info exists gdb,noresults] { return } 531 532 gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall" 533 } 534} 535 536# Do a simple test of of watching through a pointer when the pointer 537# itself changes. Should add some more complicated stuff here. 538 539proc test_complex_watchpoint {} { 540 global gdb_prompt 541 542 if [runto marker4] then { 543 gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val" 544 gdb_test "break marker5" ".*Breakpoint.*" 545 546 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint" 547 548 # Continue until we hit the marker5 function. 549 # Make sure we hit no more watchpoints. 550 551 gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \ 552 "did not trigger wrong watchpoint" 553 554 # Test watches of things declared locally in a function. 555 # In particular, test that a watch of stack-based things 556 # is deleted when the stack-based things go out of scope. 557 # 558 gdb_test "disable" "" "disable in test_complex_watchpoint" 559 gdb_test "break marker6" ".*Breakpoint.*" 560 gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \ 561 "continue to marker6" 562 gdb_test "break func2" ".*Breakpoint.*" 563 gdb_test "cont" "Continuing.*func2.*" 564 565 # Test a watch of a single stack-based variable, whose scope 566 # is the function we're now in. This should auto-delete when 567 # execution exits the scope of the watchpoint. 568 # 569 gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch" 570 gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch" 571 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch" 572 573 gdb_test "cont" "Continuing.*func2.*" 574 # We should be in "func2" again now. Test a watch of an 575 # expression which includes both a stack-based local and 576 # something whose scope is larger than this invocation 577 # of "func2". This should also auto-delete. 578 # 579 gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \ 580 "set partially local watch" 581 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \ 582 "trigger1 partially local watch" 583 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \ 584 "trigger2 partially local watch" 585 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \ 586 "self-delete partially local watch" 587 588 # We should be in "func2" again now. Test a watch of a 589 # static (non-stack-based) local. Since this has scope 590 # across any invocations of "func2", it should not auto- 591 # delete. 592 # 593 gdb_test "cont" "Continuing.*func2.*" 594 gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \ 595 "set static local watch" 596 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \ 597 "trigger static local watch" 598 gdb_test "cont" "Continuing.*marker6 \\(\\).*" \ 599 "continue after trigger static local watch" 600 gdb_test "info break" ".*watchpoint.*static_b.*" \ 601 "static local watch did not self-delete" 602 603 # We should be in "recurser" now. Test a watch of a stack- 604 # based local. Symbols mentioned in a watchpoint are bound 605 # at watchpoint-creation. Thus, a watch of a stack-based 606 # local to a recursing function should be bound only to that 607 # one invocation, and should not trigger for other invocations. 608 # 609 gdb_test "tbreak recurser" ".*Breakpoint.*" 610 gdb_test "cont" "Continuing.*recurser.*" 611 gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \ 612 "set local watch in recursive call" 613 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \ 614 "trigger local watch in recursive call" 615 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \ 616 "self-delete local watch in recursive call" 617 618 # Disable everything so we can finish the program at full speed 619 gdb_test "disable" "" "disable in test_complex_watchpoint" 620 621 if [target_info exists gdb,noresults] { return } 622 623 gdb_continue_to_end "continue to exit in test_complex_watchpoint" 624 } 625} 626 627proc test_watchpoint_and_breakpoint {} { 628 global gdb_prompt 629 630 # This is a test for PR gdb/38, which involves setting a 631 # watchpoint right after you've reached a breakpoint. 632 633 if [runto func3] then { 634 gdb_breakpoint [gdb_get_line_number "second x assignment"] 635 gdb_continue_to_breakpoint "second x assignment" 636 gdb_test "watch x" ".*atchpoint \[0-9\]+: x" 637 gdb_test_multiple "next" "next after watch x" { 638 -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" { 639 pass "next after watch x" 640 } 641 -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" { 642 kfail "gdb/38" "next after watch x" 643 } 644 } 645 } 646} 647 648# Start with a fresh gdb. 649 650gdb_exit 651gdb_start 652gdb_reinitialize_dir $srcdir/$subdir 653gdb_load $binfile 654set prev_timeout $timeout 655set timeout 600 656verbose "Timeout now 600 sec.\n" 657 658if [initialize] then { 659 660 test_simple_watchpoint 661 662 # The IDT/sim monitor only has 8 (!) open files, of which it uses 663 # 4 (!). So we have to make sure one program exits before 664 # starting another one. 665 if [istarget "mips-idt-*"] then { 666 gdb_exit 667 gdb_start 668 gdb_reinitialize_dir $srcdir/$subdir 669 gdb_load $binfile 670 initialize 671 } 672 673 test_disabling_watchpoints 674 675 # See above. 676 if [istarget "mips-idt-*"] then { 677 gdb_exit 678 gdb_start 679 gdb_reinitialize_dir $srcdir/$subdir 680 gdb_load $binfile 681 initialize 682 } 683 684 if ![target_info exists gdb,cannot_call_functions] { 685 test_stepping 686 687 # See above. 688 if [istarget "mips-idt-*"] then { 689 gdb_exit 690 gdb_start 691 gdb_reinitialize_dir $srcdir/$subdir 692 gdb_load $binfile 693 initialize 694 } 695 } 696 697 # Only enabled for some targets merely because it has not been tested 698 # elsewhere. 699 # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4 700 # breakpoint before stopping for the watchpoint. I don't know why. 701 if {[istarget "hppa*-*-*"]} then { 702 test_watchpoint_triggered_in_syscall 703 } 704 705 # See above. 706 if [istarget "mips-idt-*"] then { 707 gdb_exit 708 gdb_start 709 gdb_reinitialize_dir $srcdir/$subdir 710 gdb_load $binfile 711 initialize 712 } 713 714 # Only enabled for some targets merely because it has not been tested 715 # elsewhere. 716 if {[istarget "hppa*-*-*"] || \ 717 [istarget "sparc*-*-sunos*"] || \ 718 [istarget "m32r-*-*"]} then { 719 test_complex_watchpoint 720 } 721 722 # Verify that a user can force GDB to use "slow" watchpoints. 723 # (This proves rather little on kernels that don't support 724 # fast watchpoints, but still...) 725 # 726 if ![runto_main] then { fail "watch tests suppressed" } 727 728 send_gdb "set can-use-hw-watchpoints 0\n" 729 gdb_expect { 730 -re "$gdb_prompt $"\ 731 {pass "disable fast watches"} 732 timeout {fail "(timeout) disable fast watches"} 733 } 734 send_gdb "show can-use-hw-watchpoints\n" 735 gdb_expect { 736 -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\ 737 {pass "show disable fast watches"} 738 -re "$gdb_prompt $"\ 739 {fail "show disable fast watches"} 740 timeout {fail "(timeout) show disable fast watches"} 741 } 742 send_gdb "watch ival3 if count > 1\n" 743 gdb_expect { 744 -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\ 745 {pass "set slow conditional watch"} 746 -re "$gdb_prompt $"\ 747 {fail "set slow conditional watch"} 748 timeout {fail "(timeout) set slow conditional watch"} 749 } 750 send_gdb "continue\n" 751 gdb_expect { 752 -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\ 753 {pass "trigger slow conditional watch"} 754 -re "$gdb_prompt $"\ 755 {fail "trigger slow conditional watch"} 756 timeout {fail "(timeout) trigger slow conditional watch"} 757 } 758 759 # We've explicitly disabled hardware watches. Verify that GDB 760 # 761 # 762 send_gdb "rwatch ival3\n" 763 gdb_expect { 764 -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\ 765 {pass "rwatch disallowed when can-set-hw-watchpoints cleared"} 766 -re "$gdb_prompt $"\ 767 {fail "rwatch disallowed when can-set-hw-watchpoints cleared"} 768 timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"} 769 } 770 771 # Read- and access watchpoints are unsupported on HP-UX. Verify 772 # that GDB gracefully responds to requests to create them. 773 # 774 if [istarget "hppa*-*-hpux*"] then { 775 send_gdb "set can-use-hw-watchpoints 1\n" 776 gdb_expect { 777 -re "$gdb_prompt $"\ 778 {pass "enable fast watches"} 779 timeout {fail "(timeout) enable fast watches"} 780 } 781 send_gdb "rwatch ival3\n" 782 gdb_expect { 783 -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\ 784 {pass "read watches disallowed"} 785 -re "$gdb_prompt $"\ 786 {fail "read watches disallowed"} 787 timeout {fail "(timeout) read watches disallowed"} 788 } 789 790 send_gdb "awatch ival3\n" 791 gdb_expect { 792 -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\ 793 {pass "access watches disallowed"} 794 -re "$gdb_prompt $"\ 795 {fail "access watches disallowed"} 796 timeout {fail "(timeout) access watches disallowed"} 797 } 798 } 799 800 # See above. 801 if [istarget "mips-idt-*"] then { 802 gdb_exit 803 gdb_start 804 gdb_reinitialize_dir $srcdir/$subdir 805 gdb_load $binfile 806 initialize 807 } 808 809 test_watchpoint_and_breakpoint 810} 811 812# Restore old timeout 813set timeout $prev_timeout 814verbose "Timeout now $timeout sec.\n" 815