Merge GDB 7.5.1

gdb/testsuite/gdb.threads/watchpoint-fork.exp

+# Copyright 2012 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test case for forgotten hw-watchpoints after fork()-off of a process.
+
+set testfile watchpoint-fork
+
+if [is_remote target] {
+    kfail "remote/13584" "gdbserver does not support debugging across fork"
+    return
+}
+
+proc test {type symbol} { with_test_prefix "$type" {
+    global testfile subdir srcdir gdb_prompt
+
+    set srcfile_type ${srcdir}/${subdir}/${testfile}-${type}.c
+
+    # no threads
+
+    with_test_prefix "singlethreaded" {
+        set executable ${testfile}-${type}-st
+        set srcfile_main ${testfile}-st.c
+        if {[build_executable $testfile.exp $executable \
+                 [list $srcfile_main ${testfile}-${type}.c] \
+                 [list debug additional_flags=-D$symbol]] == -1} {
+            return -1
+        }
+
+        clean_restart $executable
+
+        if [target_info exists gdb,no_hardware_watchpoints] {
+            # The software watchpoint functionality is in GDB an unrelated test.
+            gdb_test_no_output "set can-use-hw-watchpoints 0"
+        }
+
+        gdb_test "show detach-on-fork" "Whether gdb will detach the child of a fork is on\\."
+        gdb_test_no_output "set follow-fork-mode $type"
+        gdb_test "show follow-fork-mode" "Debugger response to a program call of fork or vfork is \"$type\"\\."
+        # Testcase uses it for the `follow-fork-mode child' type.
+        gdb_test "handle SIGUSR1 nostop noprint pass" "No\[ \t\]+No\[ \t\]+Yes.*"
+
+        if ![runto_main] {
+            return
+        }
+
+        gdb_test "watch var" "atchpoint \[0-9\]+: var" "Set the watchpoint"
+
+        # It is never hit but it should not be left over in the fork()ed-off child.
+        if [skip_hw_breakpoint_tests] {
+            set hbreak "break"
+        } else {
+            set hbreak "hbreak"
+        }
+        gdb_test "$hbreak marker"
+
+        gdb_breakpoint "mark_exit"
+
+        gdb_test "continue" \
+            "reakpoint \[0-9\]+, marker.*" "hardware breakpoints work"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 0.*New value = 1.*forkoff *\\(1\\).*" "watchpoints work"
+        gdb_test "continue" \
+            "reakpoint \[0-9\]+, marker.*" "breakpoint after the first fork"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 1.*New value = 2.*forkoff *\\(2\\).*" "watchpoint after the first fork"
+        gdb_test "continue" \
+            "reakpoint \[0-9\]+, marker.*" "breakpoint after the second fork"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 2.*New value = 3.*mark_exit \\(\\);" "watchpoint after the second fork"
+        gdb_test "continue" "Continuing\\..*\r\nBreakpoint \[0-9\]+, mark_exit .*" "finish"
+    }
+
+    # threads
+
+    if [target_info exists gdb,no_hardware_watchpoints] {
+        # Watchpoint hits would get detected in unexpected threads.
+        return
+    }
+
+    with_test_prefix "multithreaded" {
+        set executable ${testfile}-${type}-mt
+        set srcfile_main ${srcdir}/${subdir}/${testfile}-mt.c
+        if { [gdb_compile_pthreads "${srcfile_main} ${srcfile_type}" [standard_output_file ${executable}] executable [list debug "additional_flags=-D$symbol -DTHREAD"]] != "" } {
+            untested ${testfile}.exp
+            return
+        }
+        clean_restart $executable
+
+        gdb_test_no_output "set follow-fork-mode $type"
+        # Testcase uses it for the `follow-fork-mode child' type.
+        gdb_test "handle SIGUSR1 nostop noprint pass" "No\[ \t\]+No\[ \t\]+Yes.*"
+
+        if ![runto_main] {
+            return
+        }
+
+        gdb_test "watch var" "atchpoint \[0-9\]+: var" "Set the watchpoint"
+
+        # It should not be left over in the fork()ed-off child.
+        gdb_test "$hbreak marker" {reakpoint [0-9]+.*}
+
+        gdb_breakpoint "mark_exit"
+
+        gdb_test "continue" \
+            "reakpoint \[0-9\]+, marker.*" "hardware breakpoints work"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 0.*New value = 1.*validity-first.*" "singlethread watchpoints work"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 1.*New value = 2.*validity-thread-A.*" "multithreaded watchpoints work at A"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 2.*New value = 3.*validity-thread-B.*" "multithreaded watchpoints work at B"
+        gdb_test "continue" \
+            "reakpoint \[0-9\]+, marker.*" "breakpoint (A) after the first fork"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 3.*New value = 4.*after-fork1-A.*" "watchpoint A after the first fork"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 4.*New value = 5.*after-fork1-B.*" "watchpoint B after the first fork"
+        gdb_test "continue" \
+            "reakpoint \[0-9\]+, marker.*" "breakpoint (A) after the second fork"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 5.*New value = 6.*after-fork2-A.*" "watchpoint A after the second fork"
+        gdb_test "continue" \
+            "atchpoint \[0-9\]+: var.*Old value = 6.*New value = 7.*after-fork2-B.*" "watchpoint B after the second fork"
+        gdb_test "continue" "Continuing\\..*\r\nBreakpoint \[0-9\]+, mark_exit .*" "finish"
+    }
+}}
+
+test parent FOLLOW_PARENT
+
+# Only GNU/Linux is known to support `set follow-fork-mode child'.
+if [istarget "*-*-linux*"] {
+    test child FOLLOW_CHILD
+} else {
+    untested "${testfile}: child"
+}