1# Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2007, 2008, 2009, 2# 2010, 2011 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 3 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, see <http://www.gnu.org/licenses/>. 16 17# This file was written by Fred Fish. (fnf@cygnus.com) 18 19if $tracelevel then { 20 strace $tracelevel 21} 22 23 24set testfile "watchpoint" 25set srcfile ${testfile}.c 26set binfile ${objdir}/${subdir}/${testfile} 27 28set wp_set 1 29 30if [get_compiler_info ${binfile}] { 31 return -1 32} 33 34if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { 35 untested watchpoint.exp 36 return -1 37} 38 39# Prepare for watchpoint tests by setting up two breakpoints and one 40# watchpoint. 41# 42# We use breakpoints at marker functions to get past all the startup code, 43# so we can get to the watchpoints in a reasonable amount of time from a 44# known starting point. 45# 46# For simplicity, so we always know how to reference specific breakpoints or 47# watchpoints by number, we expect a particular ordering and numbering of 48# each in the combined breakpoint/watchpoint table, as follows: 49# 50# Number What Where 51# 1 Breakpoint marker1() 52# 2 Breakpoint marker2() 53# 3 Watchpoint ival3 54 55proc initialize {} { 56 global gdb_prompt 57 global hex 58 global decimal 59 global srcfile 60 global wp_set 61 62 # Disable hardware watchpoints if necessary. 63 if [target_info exists gdb,no_hardware_watchpoints] { 64 gdb_test_no_output "set can-use-hw-watchpoints 0" "" 65 } 66 67 if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] { 68 return 0; 69 } 70 71 72 if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] { 73 return 0; 74 } 75 76 77 if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] { 78 return 0; 79 } 80 81 82 # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint 83 # before running can cause the inferior to croak on HP-UX 11.0 for 84 # reasons yet unknown, we've disabled the ability to set watches 85 # without a running inferior. Verify the restriction. 86 # 87 send_gdb "watch ival3\n" 88 gdb_expect { 89 -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" { 90 pass "set watchpoint on ival3" 91 } 92 -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" { 93 pass "set watchpoint on ival3" 94 set wp_set 0 95 return 1 96 } 97 timeout { 98 fail "(timeout) set watchpoint on ival3" 99 return 0 100 } 101 } 102 103 if [gdb_test "info watch" "3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] { 104 return 0; 105 } 106 107 108 # After installing the watchpoint, we disable it until we are ready 109 # to use it. This allows the test program to run at full speed until 110 # we get to the first marker function. 111 112 if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] { 113 return 0; 114 } 115 116 117 return 1 118} 119 120# 121# Test simple watchpoint. 122# 123 124proc test_simple_watchpoint {} { 125 global gdb_prompt 126 global hex 127 global decimal 128 global wp_set 129 130 # Ensure that the watchpoint is disabled when we startup. 131 132 if { $wp_set } { 133 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] { 134 return 0; 135 } 136 } 137 138 139 # Run until we get to the first marker function. 140 141 gdb_run_cmd 142 set timeout 600 143 gdb_expect { 144 -re "Breakpoint 1, marker1 .*$gdb_prompt $" { 145 pass "run to marker1 in test_simple_watchpoint" 146 } 147 -re ".*$gdb_prompt $" { 148 fail "run to marker1 in test_simple_watchpoint" 149 return 150 } 151 timeout { 152 fail "run to marker1 in test_simple_watchpoint (timeout)" 153 return 154 } 155 } 156 157 if { !$wp_set } { 158 # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint 159 # before running can cause the inferior to croak on HP-UX 11.0 160 # for reasons yet unknown, we've disabled the ability to set 161 # watches without a running inferior. The following testpoints used 162 # to be in [initialize]. 163 # 164 gdb_test "watch ival3" \ 165 "\[Ww\]atchpoint 3: ival3" \ 166 "set watchpoint on ival3" 167 168 set wp_set 1 169 170 gdb_test "info watch" \ 171 "3\[ \]*.*watchpoint.*ival3" \ 172 "watchpoint found in watchpoint/breakpoint table" 173 174 # After installing the watchpoint, we disable it until we are ready 175 # to use it. This allows the test program to run at full speed until 176 # we get to the first marker function. 177 178 gdb_test "disable 3" "disable 3" "disable watchpoint" 179 } 180 181 # After reaching the marker function, enable the watchpoint. 182 183 if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] { 184 return ; 185 } 186 187 188 gdb_test "break func1" "Breakpoint.*at.*" 189 gdb_test_no_output "set \$func1_breakpoint_number = \$bpnum" 190 191 gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \ 192 "continue to breakpoint at func1" 193 194 # Continue until the first change, from -1 to 0 195 196 send_gdb "cont\n" 197 gdb_expect { 198 -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" { 199 pass "watchpoint hit, first time" 200 } 201 -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" { 202 setup_xfail "m68*-*-*" 2597 203 fail "thought it hit breakpoint at func1 twice" 204 gdb_test_no_output "delete \$func1_breakpoint_number" 205 gdb_test "continue" "\ 206Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \ 207 "watchpoint hit, first time" 208 } 209 -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return } 210 timeout { fail "watchpoint hit, first time (timeout)" ; return } 211 eof { fail "watchpoint hit, first time (eof)" ; return } 212 } 213 214 # Check that the hit count is reported correctly 215 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1" 216 217 gdb_test_no_output "delete \$func1_breakpoint_number" 218 219 # Continue until the next change, from 0 to 1. 220 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time" 221 222 # Check that the hit count is reported correctly 223 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2" 224 225 # Continue until the next change, from 1 to 2. 226 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time" 227 228 # Check that the hit count is reported correctly 229 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3" 230 231 # Continue until the next change, from 2 to 3. 232 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time" 233 234 # Check that the hit count is reported correctly 235 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4" 236 237 # Continue until the next change, from 3 to 4. 238 # Note that this one is outside the loop. 239 240 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time" 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 5 times.*" "Watchpoint hit count is 5" 244 245 # Continue until we hit the finishing marker function. 246 # Make sure we hit no more watchpoints. 247 248 gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \ 249 "continue to marker2" 250 251 # Disable the watchpoint so we run at full speed until we exit. 252 253 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] { 254 return ; 255 } 256 257 258 # Run until process exits. 259 260 if [target_info exists gdb,noresults] { return } 261 262 gdb_continue_to_end "continue to exit in test_simple_watchpoint" 263} 264 265# Test disabling watchpoints. 266 267proc test_disabling_watchpoints {} { 268 global gdb_prompt 269 global binfile 270 global srcfile 271 global decimal 272 global hex 273 274 # "info watch" is the same as "info break" 275 gdb_test "info watch" "\[0-9]+\[ \]*.*watchpoint.*ival3\r\n\.*\[0-9\]+ times.*" "watchpoints found in watchpoint/breakpoint table" 276 277 # Ensure that the watchpoint is disabled when we startup. 278 279 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] { 280 return 0; 281 } 282 283 284 # Run until we get to the first marker function. 285 286 gdb_run_cmd 287 set timeout 600 288 gdb_expect { 289 -re "Breakpoint 1, marker1 .*$gdb_prompt $" { 290 pass "run to marker1 in test_disabling_watchpoints" 291 } 292 -re ".*$gdb_prompt $" { 293 fail "run to marker1 in test_disabling_watchpoints" 294 return 295 } 296 timeout { 297 fail "run to marker1 in test_disabling_watchpoints (timeout)" 298 return 299 } 300 } 301 302 # After reaching the marker function, enable the watchpoint. 303 304 if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] { 305 return ; 306 } 307 308 309 # Continue until the first change, from -1 to 0 310 # Don't check the old value, because on VxWorks the variable value 311 # will not have been reinitialized. 312 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time" 313 314 # Continue until the next change, from 0 to 1. 315 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" 316 317 # Disable the watchpoint but leave breakpoints 318 319 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] { 320 return 0; 321 } 322 323 324 # Check watchpoint list, looking for the entry that confirms the 325 # watchpoint is disabled. 326 gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table" 327 328 # Continue until we hit the finishing marker function. 329 # Make sure we hit no more watchpoints. 330 gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \ 331 "disabled watchpoint skipped" 332 333 if [target_info exists gdb,noresults] { return } 334 335 gdb_continue_to_end "continue to exit in test_disabling_watchpoints" 336} 337 338# Test stepping and other mundane operations with watchpoints enabled 339proc test_stepping {} { 340 global gdb_prompt 341 342 if [runto marker1] then { 343 gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2" 344 345 # Well, let's not be too mundane. It should be a *bit* of a challenge 346 gdb_test "break func2 if 0" "Breakpoint.*at.*" 347 gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*" 348 349 gdb_test "p func1 ()" "= 73" \ 350 "calling function with watchpoint enabled" 351 352 # 353 # "finish" brings us back to main. 354 # On some targets (e.g. alpha) gdb will stop from the finish in midline 355 # of the marker1 call. This is due to register restoring code on 356 # the alpha and might be caused by stack adjustment instructions 357 # on other targets. In this case we will step once more. 358 # 359 360 send_gdb "finish\n" 361 gdb_expect { 362 -re "Run.*exit from.*marker1.* at" { 363 pass "finish from marker1" 364 } 365 default { fail "finish from marker1 (timeout)" ; return } 366 } 367 368 gdb_expect { 369 -re "marker1 \\(\\);.*$gdb_prompt $" { 370 send_gdb "step\n" 371 exp_continue 372 } 373 -re "func1 \\(\\);.*$gdb_prompt $" { 374 pass "back at main from marker1" 375 } 376 -re ".*$gdb_prompt $" { 377 fail "back at main from marker1" 378 } 379 default { fail "back at main from marker1 (timeout)" ; return } 380 } 381 382 gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp" 383 384 # Now test that "until" works. It's a bit tricky to test 385 # "until", because compilers don't always arrange the code 386 # exactly the same way, and we might get slightly different 387 # sequences of statements. But the following should be true 388 # (if not it is a compiler or a debugger bug): The user who 389 # does "until" at every statement of a loop should end up 390 # stepping through the loop once, and the debugger should not 391 # stop for any of the remaining iterations. 392 393 gdb_test "until" "ival1 = count.*" "until to ival1 assignment" 394 gdb_test "until" "ival3 = count.*" "until to ival3 assignment" 395 send_gdb "until\n" 396 gdb_expect { 397 -re "(for \\(count = 0|\}).*$gdb_prompt $" { 398 gdb_test "until" "ival1 = count; /. Outside loop ./" \ 399 "until out of loop" 400 } 401 -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" { 402 pass "until out of loop" 403 } 404 -re ".*$gdb_prompt $" { 405 fail "until out of loop" 406 } 407 default { fail "until out of loop (timeout)" ; return } 408 } 409 410 gdb_test "step" "ival2 = count.*" "step to ival2 assignment" 411 } 412} 413 414# Test stepping and other mundane operations with watchpoints enabled 415proc test_watchpoint_triggered_in_syscall {} { 416 global gdb_prompt 417 418 # These tests won't work without printf support. 419 if [gdb_skip_stdio_test "watchpoints triggered in syscall"] { 420 return; 421 } 422 # Run until we get to the first marker function. 423 set x 0 424 set y 0 425 set testname "Watch buffer passed to read syscall" 426 if [runto marker2] then { 427 gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]" 428 gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]" 429 gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]" 430 gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]" 431 gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]" 432 gdb_test "break marker4" ".*Breakpoint.*" 433 434 gdb_test_no_output "set doread = 1" 435 436 # If we send_gdb "123\n" before gdb has switched the tty, then it goes 437 # to gdb, not the inferior, and we lose. So that is why we have 438 # watchpoint.c prompt us, so we can wait for that prompt. 439 440 send_gdb "continue\n"; 441 gdb_expect { 442 -re "Continuing\\.\r\ntype stuff for buf now:" { 443 pass "continue to read" 444 } 445 default { 446 fail "continue to read"; 447 return ; 448 } 449 } 450 451 send_gdb "123\n" 452 gdb_expect { 453 -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue } 454 -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue } 455 -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue } 456 -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue } 457 -re ".*$gdb_prompt $" { pass "sent 123" } 458 timeout { fail "sent 123 (timeout)" } 459 } 460 461 # Examine the values in buf to see how many watchpoints we 462 # should have printed. 463 send_gdb "print buf\[0\]\n" 464 gdb_expect { 465 -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"} 466 -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"} 467 -re ".*$gdb_prompt $" { fail "print buf\[0\]"} 468 default { fail "print buf\[0\]"} 469 } 470 send_gdb "print buf\[1\]\n" 471 gdb_expect { 472 -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"} 473 -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"} 474 -re ".*$gdb_prompt $" { fail "print buf\[1\]"} 475 default { fail "print buf\[1\]"} 476 } 477 send_gdb "print buf\[2\]\n" 478 gdb_expect { 479 -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"} 480 -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"} 481 -re ".*$gdb_prompt $" { fail "print buf\[2\]"} 482 default { fail "print buf\[2\]"} 483 } 484 send_gdb "print buf\[3\]\n" 485 gdb_expect { 486 -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"} 487 -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"} 488 -re ".*$gdb_prompt $" { fail "print buf\[3\]" } 489 default { fail "print buf\[3\]" } 490 } 491 492 # Did we find what we were looking for? If not, flunk it. 493 if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"} 494 495 # Continue until we hit the finishing marker function. 496 # Make sure we hit no more watchpoints. 497 gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \ 498 "continue to marker4" 499 500 # Disable everything so we can finish the program at full speed 501 gdb_test_no_output "disable" "disable in test_watchpoint_triggered_in_syscall" 502 503 if [target_info exists gdb,noresults] { return } 504 505 gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall" 506 } 507} 508 509# Do a simple test of of watching through a pointer when the pointer 510# itself changes. Should add some more complicated stuff here. 511 512proc test_complex_watchpoint {} { 513 global gdb_prompt 514 515 if [runto marker4] then { 516 gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val" 517 gdb_test "break marker5" ".*Breakpoint.*" 518 519 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint" 520 521 # Continue until we hit the marker5 function. 522 # Make sure we hit no more watchpoints. 523 524 gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \ 525 "did not trigger wrong watchpoint" 526 527 # Test watches of things declared locally in a function. 528 # In particular, test that a watch of stack-based things 529 # is deleted when the stack-based things go out of scope. 530 # 531 gdb_test_no_output "disable" "disable in test_complex_watchpoint" 532 gdb_test "break marker6" ".*Breakpoint.*" 533 gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \ 534 "continue to marker6" 535 gdb_test "break func2" ".*Breakpoint.*" 536 gdb_test "cont" "Continuing.*func2.*" 537 538 # Test a watch of a single stack-based variable, whose scope 539 # is the function we're now in. This should auto-delete when 540 # execution exits the scope of the watchpoint. 541 # 542 gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch" 543 gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch" 544 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch" 545 546 gdb_test "cont" "Continuing.*func2.*" 547 # We should be in "func2" again now. Test a watch of an 548 # expression which includes both a stack-based local and 549 # something whose scope is larger than this invocation 550 # of "func2". This should also auto-delete. 551 # 552 gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \ 553 "set partially local watch" 554 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \ 555 "trigger1 partially local watch" 556 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \ 557 "trigger2 partially local watch" 558 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \ 559 "self-delete partially local watch" 560 561 # We should be in "func2" again now. Test a watch of a 562 # static (non-stack-based) local. Since this has scope 563 # across any invocations of "func2", it should not auto- 564 # delete. 565 # 566 gdb_test "cont" "Continuing.*func2.*" 567 gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \ 568 "set static local watch" 569 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \ 570 "trigger static local watch" 571 gdb_test "cont" "Continuing.*marker6 \\(\\).*" \ 572 "continue after trigger static local watch" 573 gdb_test "info break" ".*watchpoint.*static_b.*" \ 574 "static local watch did not self-delete" 575 576 # We should be in "recurser" now. Test a watch of a stack- 577 # based local. Symbols mentioned in a watchpoint are bound 578 # at watchpoint-creation. Thus, a watch of a stack-based 579 # local to a recursing function should be bound only to that 580 # one invocation, and should not trigger for other invocations. 581 # 582 gdb_test "tbreak recurser" ".*breakpoint.*" 583 gdb_test "cont" "Continuing.*recurser.*" 584 gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \ 585 "set local watch in recursive call" 586 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \ 587 "trigger local watch in recursive call" 588 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \ 589 "self-delete local watch in recursive call" 590 591 # Disable everything so we can finish the program at full speed 592 gdb_test_no_output "disable" "disable in test_complex_watchpoint" 593 594 if [target_info exists gdb,noresults] { return } 595 596 gdb_continue_to_end "continue to exit in test_complex_watchpoint" 597 } 598} 599 600proc test_watchpoint_and_breakpoint {} { 601 global gdb_prompt 602 603 # This is a test for PR gdb/38, which involves setting a 604 # watchpoint right after you've reached a breakpoint. 605 606 if [runto func3] then { 607 gdb_breakpoint [gdb_get_line_number "second x assignment"] 608 gdb_continue_to_breakpoint "second x assignment" 609 gdb_test "watch x" ".*atchpoint \[0-9\]+: x" 610 gdb_test_multiple "next" "next after watch x" { 611 -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" { 612 pass "next after watch x" 613 } 614 -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" { 615 kfail "gdb/38" "next after watch x" 616 } 617 } 618 619 gdb_test_no_output "delete \$bpnum" "delete watch x" 620 } 621} 622 623proc test_constant_watchpoint {} { 624 gdb_test "watch 5" "Cannot watch constant value `5'." "number is constant" 625 gdb_test "watch marker1" "Cannot watch constant value `marker1'." \ 626 "marker1 is constant" 627 gdb_test "watch count + 6" ".*atchpoint \[0-9\]+: count \\+ 6" 628 gdb_test_no_output "delete \$bpnum" "delete watchpoint `count + 6'" 629 gdb_test "watch 7 + count" ".*atchpoint \[0-9\]+: 7 \\+ count" 630 gdb_test_no_output "delete \$bpnum" "delete watchpoint `7 + count'" 631} 632 633proc test_watch_location {} { 634 gdb_breakpoint [gdb_get_line_number "func5 breakpoint here"] 635 gdb_continue_to_breakpoint "func5 breakpoint here" 636 637 gdb_test "watch -location *x" "atchpoint .*: .*" "watch -location .x" 638 639 gdb_test "continue" \ 640 "Continuing.*\[Ww\]atchpoint .*: .*New value = 27.*" \ 641 "continue with watch -location" 642 643 gdb_test_no_output "delete \$bpnum" "delete watch -location" 644} 645 646proc test_inaccessible_watchpoint {} { 647 global gdb_prompt 648 649 # This is a test for watchpoints on currently inaccessible (but later 650 # valid) memory. 651 652 if [runto func4] then { 653 # Make sure we only allow memory access errors. 654 set msg "watchpoint refused to insert on nonexistent struct member" 655 gdb_test_multiple "watch struct1.nosuchmember" $msg { 656 -re ".*atchpoint \[0-9\]+: struct1.nosuchmember.*$gdb_prompt $" { 657 # PR breakpoints/9681 658 fail $msg 659 } 660 -re "There is no member named nosuchmember\\..*$gdb_prompt $" { 661 pass $msg 662 } 663 } 664 665 # See whether a watchpoint on a normal variable is a hardware 666 # watchpoint or not. The watchpoints on NULL should be hardware 667 # iff this one is. 668 set watchpoint_msg "Watchpoint" 669 gdb_test_multiple "watch global_ptr" "watch global_ptr" { 670 -re "Watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" { 671 pass "watch global_ptr" 672 } 673 -re "Hardware watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" { 674 set watchpoint_msg "Hardware watchpoint" 675 pass "watch global_ptr" 676 } 677 } 678 delete_breakpoints 679 680 # Make sure that we can watch a constant address, and correctly 681 # use a HW watchpoint if supported. 682 gdb_test "watch *(int *) 0" \ 683 "$watchpoint_msg \[0-9\]+: \\*\\(int \\*\\) 0" 684 delete_breakpoints 685 686 # The same, but using -location through an indirection. 687 gdb_test "watch -location *global_ptr" \ 688 "$watchpoint_msg \[0-9\]+: \-location \\*global_ptr" 689 delete_breakpoints 690 691 # This step requires two HW watchpoints. Since some platforms only 692 # have a single one, accept either SW or HW watchpoint in this case. 693 if {[skip_hw_watchpoint_multi_tests]} { 694 set watchpoint_msg "(Watchpoint|Hardware watchpoint)" 695 } 696 697 gdb_test "watch *global_ptr" "$watchpoint_msg \[0-9\]+: \\\*global_ptr" 698 gdb_test "set \$global_ptr_breakpoint_number = \$bpnum" "" 699 gdb_test "next" ".*global_ptr = buf.*" "global_ptr next" 700 gdb_test_multiple "next" "next over ptr init" { 701 -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = .*\r\nNew value = 3 .*\r\n.*$gdb_prompt $" { 702 # We can not test for <unknown> here because NULL may be readable. 703 # This test does rely on *NULL != 3. 704 pass "next over ptr init" 705 } 706 } 707 gdb_test_multiple "next" "next over buffer set" { 708 -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = 3 .*\r\nNew value = 7 .*\r\n.*$gdb_prompt $" { 709 pass "next over buffer set" 710 } 711 } 712 gdb_test "delete \$global_ptr_breakpoint_number" "" 713 gdb_test "watch **global_ptr_ptr" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr" 714 gdb_test "set \$global_ptr_ptr_breakpoint_number = \$bpnum" "" 715 gdb_test "next" ".*global_ptr_ptr = &global_ptr.*" "gloabl_ptr_ptr next" 716 gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = .*\r\nNew value = 7 .*" "next over global_ptr_ptr init" 717 gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = 7 .*\r\nNew value = 9 .*" "next over global_ptr_ptr buffer set" 718 gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = 9 .*\r\nNew value = 5 .*" "next over global_ptr_ptr pointer advance" 719 gdb_test_no_output "delete \$global_ptr_ptr_breakpoint_number" 720 } 721} 722 723proc test_watchpoint_in_big_blob {} { 724 global gdb_prompt 725 726 gdb_test "watch buf" ".*atchpoint \[0-9\]+: buf" 727 gdb_test "cont" "Continuing.*atchpoint \[0-9\]+: buf\r\n\r\nOld value = .*testte\".*" "watchpoint on buf hit" 728 729 gdb_test_no_output "delete \$bpnum" "delete watch buf" 730} 731 732# Start with a fresh gdb. 733 734gdb_exit 735gdb_start 736gdb_reinitialize_dir $srcdir/$subdir 737gdb_load $binfile 738set prev_timeout $timeout 739set timeout 600 740verbose "Timeout now 600 sec.\n" 741 742if [initialize] then { 743 744 test_simple_watchpoint 745 746 # The IDT/sim monitor only has 8 (!) open files, of which it uses 747 # 4 (!). So we have to make sure one program exits before 748 # starting another one. 749 if [istarget "mips-idt-*"] then { 750 gdb_exit 751 gdb_start 752 gdb_reinitialize_dir $srcdir/$subdir 753 gdb_load $binfile 754 initialize 755 } 756 757 test_disabling_watchpoints 758 759 # See above. 760 if [istarget "mips-idt-*"] then { 761 gdb_exit 762 gdb_start 763 gdb_reinitialize_dir $srcdir/$subdir 764 gdb_load $binfile 765 initialize 766 } 767 768 if ![target_info exists gdb,cannot_call_functions] { 769 test_stepping 770 771 # See above. 772 if [istarget "mips-idt-*"] then { 773 gdb_exit 774 gdb_start 775 gdb_reinitialize_dir $srcdir/$subdir 776 gdb_load $binfile 777 initialize 778 } 779 } 780 781 # Only enabled for some targets merely because it has not been tested 782 # elsewhere. 783 # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4 784 # breakpoint before stopping for the watchpoint. I don't know why. 785 if {[istarget "hppa*-*-*"]} then { 786 test_watchpoint_triggered_in_syscall 787 } 788 789 # See above. 790 if [istarget "mips-idt-*"] then { 791 gdb_exit 792 gdb_start 793 gdb_reinitialize_dir $srcdir/$subdir 794 gdb_load $binfile 795 initialize 796 } 797 798 # Only enabled for some targets merely because it has not been tested 799 # elsewhere. 800 if {[istarget "hppa*-*-*"] || \ 801 [istarget "sparc*-*-sunos*"] || \ 802 [istarget "m32r-*-*"]} then { 803 test_complex_watchpoint 804 } 805 806 test_inaccessible_watchpoint 807 808 # Verify that a user can force GDB to use "slow" watchpoints. 809 # (This proves rather little on kernels that don't support 810 # fast watchpoints, but still...) 811 # 812 if ![runto_main] then { fail "watch tests suppressed" } 813 814 send_gdb "set can-use-hw-watchpoints 0\n" 815 gdb_expect { 816 -re "$gdb_prompt $"\ 817 {pass "disable fast watches"} 818 timeout {fail "(timeout) disable fast watches"} 819 } 820 send_gdb "show can-use-hw-watchpoints\n" 821 gdb_expect { 822 -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\ 823 {pass "show disable fast watches"} 824 -re "$gdb_prompt $"\ 825 {fail "show disable fast watches"} 826 timeout {fail "(timeout) show disable fast watches"} 827 } 828 send_gdb "watch ival3 if count > 1\n" 829 gdb_expect { 830 -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\ 831 {pass "set slow conditional watch"} 832 -re "$gdb_prompt $"\ 833 {fail "set slow conditional watch"} 834 timeout {fail "(timeout) set slow conditional watch"} 835 } 836 send_gdb "continue\n" 837 gdb_expect { 838 -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\ 839 {pass "trigger slow conditional watch"} 840 -re "$gdb_prompt $"\ 841 {fail "trigger slow conditional watch"} 842 timeout {fail "(timeout) trigger slow conditional watch"} 843 } 844 845 # We've explicitly disabled hardware watches. Verify that GDB 846 # refrains from using them. 847 # 848 send_gdb "rwatch ival3\n" 849 gdb_expect { 850 -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\ 851 {pass "rwatch disallowed when can-set-hw-watchpoints cleared"} 852 -re "$gdb_prompt $"\ 853 {fail "rwatch disallowed when can-set-hw-watchpoints cleared"} 854 timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"} 855 } 856 857 # Read- and access watchpoints are unsupported on HP-UX. Verify 858 # that GDB gracefully responds to requests to create them. 859 # 860 if [istarget "hppa*-*-hpux*"] then { 861 send_gdb "set can-use-hw-watchpoints 1\n" 862 gdb_expect { 863 -re "$gdb_prompt $"\ 864 {pass "enable fast watches"} 865 timeout {fail "(timeout) enable fast watches"} 866 } 867 send_gdb "rwatch ival3\n" 868 gdb_expect { 869 -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\ 870 {pass "read watches disallowed"} 871 -re "$gdb_prompt $"\ 872 {fail "read watches disallowed"} 873 timeout {fail "(timeout) read watches disallowed"} 874 } 875 876 send_gdb "awatch ival3\n" 877 gdb_expect { 878 -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\ 879 {pass "access watches disallowed"} 880 -re "$gdb_prompt $"\ 881 {fail "access watches disallowed"} 882 timeout {fail "(timeout) access watches disallowed"} 883 } 884 } 885 886 # See above. 887 if [istarget "mips-idt-*"] then { 888 gdb_exit 889 gdb_start 890 gdb_reinitialize_dir $srcdir/$subdir 891 gdb_load $binfile 892 initialize 893 } 894 895 test_watchpoint_and_breakpoint 896 897 test_watchpoint_in_big_blob 898 899 # See above. 900 if [istarget "mips-idt-*"] then { 901 clean_restart 902 } 903 904 test_constant_watchpoint 905 906 test_watch_location 907} 908 909# Restore old timeout 910set timeout $prev_timeout 911verbose "Timeout now $timeout sec.\n" 912