1# Copyright 1997, 1999, 2007, 2008, 2009, 2010, 2011 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 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 17if { [is_remote target] || ![isnative] } then { 18 continue 19} 20 21 22# NOTE drow/2002-12-06: I don't know what the referenced kernel problem 23# is, but it appears to be fixed in recent HP/UX versions. 24 25##if [istarget "hppa2.0w-hp-hpux*"] { 26## warning "Don't run gdb.base/foll-vfork.exp until JAGaa43495 kernel problem is fixed." 27## return 0 28##} 29 30global srcfile 31set testfile "foll-vfork" 32set testfile2 "vforked-prog" 33set srcfile ${testfile}.c 34set srcfile2 ${testfile2}.c 35set binfile ${objdir}/${subdir}/${testfile} 36set binfile2 ${objdir}/${subdir}/${testfile2} 37 38if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { 39 untested foll-vfork.exp 40 return -1 41} 42 43if { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } { 44 untested foll-vfork.exp 45 return -1 46} 47 48 49# Until "set follow-fork-mode" and "catch vfork" are implemented on 50# other targets... 51# 52if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then { 53 continue 54} 55 56# Test to see if we are on an HP-UX 10.20 and if so, 57# do not run these tests as catching vfork is disabled for 58# 10.20. 59 60if [istarget "hppa*-hp-hpux10.20"] then { 61 return 0 62} 63 64# A few of these tests require a little more time than the standard 65# timeout allows. 66set oldtimeout $timeout 67set timeout [expr "$timeout + 10"] 68 69proc check_vfork_catchpoints {} { 70 global gdb_prompt 71 global has_vfork_catchpoints 72 73 # Verify that the system supports "catch vfork". 74 gdb_test "catch vfork" "Catchpoint \[0-9\]* \\(vfork\\)" "insert first vfork catchpoint" 75 set has_vfork_catchpoints 0 76 gdb_test_multiple "continue" "continue to first vfork catchpoint" { 77 -re ".*Your system does not support this type\r\nof catchpoint.*$gdb_prompt $" { 78 unsupported "continue to first vfork catchpoint" 79 } 80 -re ".*Catchpoint.*$gdb_prompt $" { 81 set has_vfork_catchpoints 1 82 pass "continue to first vfork catchpoint" 83 } 84 } 85 86 if {$has_vfork_catchpoints == 0} { 87 unsupported "vfork catchpoints" 88 return -code return 89 } 90} 91 92proc vfork_parent_follow_through_step {} { 93 global gdb_prompt 94 95 send_gdb "set follow-fork parent\n" 96 gdb_expect { 97 -re "$gdb_prompt $" {pass "set follow-fork parent, vfork through step"} 98 timeout {fail "set follow-fork parent, vfork through step"} 99 } 100 send_gdb "next\n" 101 gdb_expect { 102 -re "Detaching after fork from.*13.*$gdb_prompt "\ 103 {pass "vfork parent follow, through step"} 104 -re "$gdb_prompt $" {fail "vfork parent follow, through step"} 105 timeout {fail "(timeout) vfork parent follow, through step" } 106 } 107 # The child has been detached; allow time for any output it might 108 # generate to arrive, so that output doesn't get confused with 109 # any gdb_expected debugger output from a subsequent testpoint. 110 # 111 exec sleep 1 112} 113 114proc vfork_parent_follow_to_bp {} { 115 global gdb_prompt 116 global srcfile 117 118 send_gdb "set follow-fork parent\n" 119 gdb_expect { 120 -re "$gdb_prompt $" {pass "set follow-fork parent, vfork to bp"} 121 timeout {fail "set follow-fork parent, vfork to bp"} 122 } 123 send_gdb "break ${srcfile}:18\n" 124 gdb_expect { 125 -re "$gdb_prompt $" {pass "break, vfork to bp"} 126 timeout {fail "break, vfork to bp"} 127 } 128 send_gdb "continue\n" 129 gdb_expect { 130 -re ".*Detaching after fork from child process.*Breakpoint.*18.*$gdb_prompt "\ 131 {pass "vfork parent follow, to bp"} 132 -re "$gdb_prompt $" {fail "vfork parent follow, to bp"} 133 timeout {fail "(timeout) vfork parent follow, to bp" } 134 } 135 # The child has been detached; allow time for any output it might 136 # generate to arrive, so that output doesn't get confused with 137 # any expected debugger output from a subsequent testpoint. 138 # 139 exec sleep 1 140} 141 142proc vfork_and_exec_child_follow_to_main_bp {} { 143 global gdb_prompt 144 global binfile 145 146 send_gdb "set follow-fork child\n" 147 gdb_expect { 148 -re "$gdb_prompt $" {pass "set follow-fork child, vfork and exec to main bp"} 149 timeout {fail "set follow-fork child, vfork and exec to main bp"} 150 } 151 send_gdb "continue\n" 152 gdb_expect { 153 -re "Attaching after.* vfork to.*xecuting new program.*Breakpoint.*vforked-prog.c:9.*$gdb_prompt "\ 154 {pass "vfork and exec child follow, to main bp"} 155 -re "$gdb_prompt $" {fail "vfork and exec child follow, to main bp"} 156 timeout {fail "(timeout) vfork and exec child follow, to main bp" } 157 } 158 # The parent has been detached; allow time for any output it might 159 # generate to arrive, so that output doesn't get confused with 160 # any gdb_expected debugger output from a subsequent testpoint. 161 # 162 exec sleep 1 163 164 # Explicitly kill this child, or a subsequent rerun actually runs 165 # the exec'd child, not the original program... 166 send_gdb "kill\n" 167 gdb_expect { 168 -re ".*Kill the program being debugged.*y or n. $" { 169 send_gdb "y\n" 170 send_gdb "file $binfile\n" 171 gdb_expect { 172 -re ".*Load new symbol table from.*y or n. $" { 173 send_gdb "y\n" 174 gdb_expect { 175 -re "Reading symbols from.*$gdb_prompt $" {} 176 timeout { fail "loading symbols (timeout)"; return } 177 } 178 } 179 -re ".*gdb_prompt $" {} 180 timeout { fail "loading symbols (timeout)"; return } 181 } 182 } 183 -re ".*$gdb_prompt $" {} 184 timeout { fail "killing inferior (timeout)" ; return } 185 } 186} 187 188proc vfork_and_exec_child_follow_through_step {} { 189 global gdb_prompt 190 global binfile 191 192# This test cannot be performed prior to HP-UX 10.30, because ptrace-based 193# debugging of a vforking program basically doesn't allow the child to do 194# things like hit a breakpoint between a vfork and exec. This means that 195# saying "set follow-fork child; next" at a vfork() call won't work, because 196# the implementation of "next" sets a "step resume" breakpoint at the 197# return from the vfork(), which the child will hit on its way to exec'ing. 198# 199 if { ![istarget "hppa*-*-hpux11.*"] } { 200 verbose "vfork child-following next test ignored for non-hppa or pre-HP/UX-10.30 targets." 201 return 0 202 } 203 204 send_gdb "set follow-fork child\n" 205 gdb_expect { 206 -re "$gdb_prompt $" {pass "set follow-fork child, vfork and exec through step"} 207 timeout {fail "set follow-fork child, vfork and exec through step"} 208 } 209 send_gdb "next\n" 210 gdb_expect { 211 -re "Attaching after fork to.*Executing new program.*Breakpoint.*vforked-prog.c:9.*$gdb_prompt "\ 212 {pass "vfork and exec child follow, through step"} 213 -re "$gdb_prompt $" {fail "vfork and exec child follow, through step"} 214 timeout {fail "(timeout) vfork and exec child follow, through step" } 215 } 216 # The parent has been detached; allow time for any output it might 217 # generate to arrive, so that output doesn't get confused with 218 # any expected debugger output from a subsequent testpoint. 219 # 220 exec sleep 1 221 222 # Explicitly kill this child, or a subsequent rerun actually runs 223 # the exec'd child, not the original program... 224 send_gdb "kill\n" 225 gdb_expect { 226 -re ".*Kill the program being debugged.*y or n. $" { 227 send_gdb "y\n" 228 send_gdb "file $binfile\n" 229 gdb_expect { 230 -re ".*Load new symbol table from.*y or n. $" { 231 send_gdb "y\n" 232 gdb_expect { 233 -re "Reading symbols from.*$gdb_prompt $" {} 234 timeout { fail "loading symbols (timeout)"; return } 235 } 236 } 237 -re ".*gdb_prompt $" {} 238 timeout { fail "loading symbols (timeout)"; return } 239 } 240 } 241 -re ".*$gdb_prompt $" {} 242 timeout { fail "killing inferior (timeout)" ; return } 243 } 244} 245 246proc tcatch_vfork_then_parent_follow {} { 247 global gdb_prompt 248 global srcfile 249 250 send_gdb "set follow-fork parent\n" 251 gdb_expect { 252 -re "$gdb_prompt $" {pass "set follow-fork parent, tcatch vfork"} 253 timeout {fail "set follow-fork parent, tcatch vfork"} 254 } 255 send_gdb "tcatch vfork\n" 256 gdb_expect { 257 -re "Catchpoint .*(vfork).*$gdb_prompt $"\ 258 {pass "vfork parent follow, set tcatch vfork"} 259 -re "$gdb_prompt $" {fail "vfork parent follow, set tcatch vfork"} 260 timeout {fail "(timeout) vfork parent follow, set tcatch vfork"} 261 } 262 send_gdb "continue\n" 263# HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs 264# stop you in "_vfork". 265 gdb_expect { 266 -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt "\ 267 {pass "vfork parent follow, tcatch vfork"} 268 -re "vfork \\(\\) at.*$gdb_prompt "\ 269 {pass "vfork parent follow, tcatch vfork"} 270 -re "$gdb_prompt $" {fail "vfork parent follow, tcatch vfork"} 271 timeout {fail "(timeout) vfork parent follow, tcatch vfork"} 272 } 273 send_gdb "finish\n" 274 gdb_expect { 275 -re "Run till exit from.*vfork.*0x\[0-9a-fA-F\]* in main .* at .*${srcfile}:12.*$gdb_prompt "\ 276 {pass "vfork parent follow, finish after tcatch vfork"} 277 -re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " { 278 send_gdb "finish\n" 279 exp_continue 280 } 281 -re "$gdb_prompt $" {fail "vfork parent follow, finish after tcatch vfork"} 282 timeout {fail "(timeout) vfork parent follow, finish after tcatch vfork" } 283 } 284 # The child has been detached; allow time for any output it might 285 # generate to arrive, so that output doesn't get confused with 286 # any expected debugger output from a subsequent testpoint. 287 # 288 exec sleep 1 289} 290 291proc tcatch_vfork_then_child_follow {} { 292 global gdb_prompt 293 global srcfile 294 global srcfile2 295 296 send_gdb "set follow-fork child\n" 297 gdb_expect { 298 -re "$gdb_prompt $" {pass "set follow-fork child, tcatch vfork"} 299 timeout {fail "set follow-fork child, tcatch vfork"} 300 } 301 send_gdb "tcatch vfork\n" 302 gdb_expect { 303 -re "Catchpoint .*(vfork).*$gdb_prompt $"\ 304 {pass "vfork child follow, set tcatch vfork"} 305 -re "$gdb_prompt $" {fail "vfork child follow, set tcatch vfork"} 306 timeout {fail "(timeout) vfork child follow, set tcatch vfork"} 307 } 308 send_gdb "continue\n" 309# HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs 310# stop you in "_vfork". 311 gdb_expect { 312 -re "vfork \\(\\) at .*$gdb_prompt $"\ 313 {pass "vfork child follow, tcatch vfork"} 314 -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt "\ 315 {pass "vfork child follow, tcatch vfork"} 316 -re "$gdb_prompt $" {fail "vfork child follow, tcatch vfork"} 317 timeout {fail "(timeout) vfork child follow, tcatch vfork"} 318 } 319 send_gdb "finish\n" 320 gdb_expect { 321 -re "Run till exit from.*vfork.*${srcfile}:12.*$gdb_prompt "\ 322 {pass "vfork child follow, finish after tcatch vfork"} 323 -re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " { 324 send_gdb "finish\n" 325 exp_continue 326 } 327 -re "Run till exit from.*vfork.*${srcfile2}:9.*$gdb_prompt "\ 328 {pass "vfork child follow, finish after tcatch vfork (followed exec)"} 329 -re "$gdb_prompt $" {fail "vfork child follow, finish after tcatch vfork"} 330 timeout {fail "(timeout) vfork child follow, finish after tcatch vfork" } 331 } 332 # The parent has been detached; allow time for any output it might 333 # generate to arrive, so that output doesn't get confused with 334 # any expected debugger output from a subsequent testpoint. 335 # 336 exec sleep 1 337} 338 339proc do_vfork_and_exec_tests {} { 340 global gdb_prompt 341 342 # Check that vfork catchpoints are supported, as an indicator for whether 343 # vfork-following is supported. 344 if [runto_main] then { check_vfork_catchpoints } 345 346 # Try following the parent process by stepping through a call to 347 # vfork. Do this without catchpoints. 348 if [runto_main] then { vfork_parent_follow_through_step } 349 350 # Try following the parent process by setting a breakpoint on the 351 # other side of a vfork, and running to that point. Do this 352 # without catchpoints. 353 if [runto_main] then { vfork_parent_follow_to_bp } 354 355 # Try following the child process by just continuing through the 356 # vfork, and letting the parent's breakpoint on "main" be auto- 357 # magically reset in the child. 358 # 359 if [runto_main] then { vfork_and_exec_child_follow_to_main_bp } 360 361 # Try following the child process by stepping through a call to 362 # vfork. The child also executes an exec. Since the child cannot 363 # be debugged until after it has exec'd, and since there's a bp on 364 # "main" in the parent, and since the bp's for the parent are 365 # recomputed in the exec'd child, the step through a vfork should 366 # land us in the "main" for the exec'd child, too. 367 # 368 if [runto_main] then { vfork_and_exec_child_follow_through_step } 369 370 # Try catching a vfork, and stepping out to the parent. 371 # 372 if [runto_main] then { tcatch_vfork_then_parent_follow } 373 374 # Try catching a vfork, and stepping out to the child. 375 # 376 if [runto_main] then { tcatch_vfork_then_child_follow } 377 378 # Test the ability to follow both child and parent of a vfork. Do 379 # this without catchpoints. 380 # ??rehrauer: NYI. Will add testpoints here when implemented. 381 # 382 383 # Test the ability to have the debugger ask the user at vfork-time 384 # whether to follow the parent, child or both. Do this without 385 # catchpoints. 386 # ??rehrauer: NYI. Will add testpoints here when implemented. 387 # 388} 389 390# Start with a fresh gdb 391 392gdb_exit 393gdb_start 394gdb_reinitialize_dir $srcdir/$subdir 395gdb_load ${binfile} 396 397# The "Detaching..." and "Attaching..." messages may be hidden by 398# default. 399gdb_test_no_output "set verbose" 400 401# This is a test of gdb's ability to follow the parent or child 402# of a Unix vfork() system call. (The child will subsequently 403# call a variant of a Unix exec() system call.) 404# 405do_vfork_and_exec_tests 406 407set timeout $oldtimeout 408return 0 409