ChangeLog:

	* infrun.c (handle_inferior_event): Handle presence of single-step
	breakpoints for TARGET_WAITKIND_FORKED and TARGET_WAITKIND_VFORKED.
	Cancel single-step breakpoints for TARGET_WAITKIND_EXITED,
	TARGET_WAITKIND_SIGNALED, and TARGET_WAITKIND_EXECD.
	* breakpoint.c (detach_single_step_breakpoints): New function.
	(detach_breakpoints): Call it.
	(cancel_single_step_breakpoints): New function.
	* breakpoint.h (cancel_single_step_breakpoints): Add prototype.

	* spu-tdep.c (spu_memory_remove_breakpoint): New function.
	(spu_gdbarch_init): Install it.

testsuite/ChangeLog:

	* gdb.cell/fork.exp: New file.
	* gdb.cell/fork.c: Likewise.
	* gdb.cell/fork-spu.c: Likewise.

3 files changed, 209 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.cell/fork-spu.c b/gdb/testsuite/gdb.cell/fork-spu.c
new file mode 100644
index 0000000000..92a7b4cebe
--- /dev/null
+++ b/gdb/testsuite/gdb.cell/fork-spu.c
@@ -0,0 +1,47 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2010 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/>.
+
+   Contributed by Ulrich Weigand <uweigand@de.ibm.com>  */
+
+#include <spu_mfcio.h>
+
+int var;
+
+void
+func (void)
+{
+}
+
+int
+main (unsigned long long speid, unsigned long long argp,
+      unsigned long long envp)
+{
+  /* Signal to PPU side that it should fork now.  */
+  spu_write_out_intr_mbox (0);
+
+  /* Wait until fork completed.  */
+  spu_read_in_mbox ();
+
+  /* Trigger watchpoint.  */
+  var = 1;
+
+  /* Now call some function to trigger breakpoint.  */
+  func ();
+
+  return 0;
+}
+
diff --git a/gdb/testsuite/gdb.cell/fork.c b/gdb/testsuite/gdb.cell/fork.c
new file mode 100644
index 0000000000..c3f2587458
--- /dev/null
+++ b/gdb/testsuite/gdb.cell/fork.c
@@ -0,0 +1,77 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2010 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/>.
+
+   Contributed by Ulrich Weigand <uweigand@de.ibm.com>  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <libspe2.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+extern spe_program_handle_t fork_spu;
+
+void *
+spe_thread (void * arg)
+{
+  int flags = 0;
+  unsigned int entry = SPE_DEFAULT_ENTRY;
+  spe_context_ptr_t *ctx = (spe_context_ptr_t *) arg;
+
+  spe_program_load (*ctx, &fork_spu);
+  spe_context_run (*ctx, &entry, flags, NULL, NULL, NULL);
+
+  pthread_exit (NULL);
+}
+
+int
+main (void)
+{
+  pthread_t pts;
+  spe_context_ptr_t ctx;
+  unsigned int value;
+  unsigned int pid;
+
+  ctx = spe_context_create (0, NULL);
+  pthread_create (&pts, NULL, &spe_thread, &ctx);
+
+  /* Wait until the SPU thread is running.  */
+  spe_out_intr_mbox_read (ctx, &value, 1, SPE_MBOX_ALL_BLOCKING);
+
+  pid = fork ();
+  if (pid == 0)
+    {
+      /* This is the child.  Just exit immediately.  */
+      exit (0);
+    }
+  else
+    {
+      /* This is the parent.  Wait for the child to exit.  */
+      waitpid (pid, NULL, 0);
+    }
+
+  /* Tell SPU to continue.  */
+  spe_in_mbox_write (ctx, &value, 1, SPE_MBOX_ALL_BLOCKING);
+  
+  pthread_join (pts, NULL);
+  spe_context_destroy (ctx);
+
+  return 0;
+}
+
diff --git a/gdb/testsuite/gdb.cell/fork.exp b/gdb/testsuite/gdb.cell/fork.exp
new file mode 100644
index 0000000000..d2ac711526
--- /dev/null
+++ b/gdb/testsuite/gdb.cell/fork.exp
@@ -0,0 +1,85 @@
+# Copyright 2010 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/>.
+#
+# Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
+#
+# Testsuite for Cell Broadband Engine combined debugger
+# This testcases tests support for PPU-side fork during SPU debugging
+
+load_lib cell.exp
+
+set testfile "fork"
+set ppu_file "fork"
+set ppu_src ${srcdir}/${subdir}/${ppu_file}.c
+set ppu_bin ${objdir}/${subdir}/${ppu_file}
+set spu_file "fork-spu"
+set spu_src ${srcdir}/${subdir}/${spu_file}.c
+set spu_bin ${objdir}/${subdir}/${spu_file}
+
+if {[skip_cell_tests]} {
+    return 0
+}
+
+# Compile SPU binary.
+if { [gdb_compile_cell_spu $spu_src $spu_bin executable {debug}]  != "" } {
+  unsupported "Compiling spu binary failed."
+  return -1
+}
+# Compile PPU binary.
+if { [gdb_cell_embedspu $spu_bin $spu_bin-embed.o {debug}]  != "" } {
+  unsupported "Embedding spu binary failed."
+  return -1
+}
+if { [gdb_compile_cell_ppu [list $ppu_src $spu_bin-embed.o] $ppu_bin executable {debug}] != "" } {
+  unsupported "Compiling ppu binary failed."
+  return -1
+}
+
+if [get_compiler_info ${ppu_bin}] {
+  return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${ppu_bin}
+
+if ![runto_main] then {
+  fail "Can't run to main"
+  return 0
+}
+
+gdb_test_no_output "set spu stop-on-load" "set spu stop-on-load"
+
+gdb_test "continue" "Continuing\\..*Temporary breakpoint \[0-9\]+, main \\(speid=.*, argp=.*, envp=.*\\) at .*$spu_file\\.c:.*spu_write_out_intr_mbox.*" \
+	 "run until SPU main"
+
+gdb_test "break func" "Breakpoint \[0-9\]+ at.* file .*$spu_file.c, line \[0-9\]+\\." "break func"
+gdb_test "watch var" "Watchpoint \[0-9\]+: var" "watch var"
+
+gdb_test "continue" "Continuing\\..*Watchpoint.*Old value = 0.*New value = 1.*" \
+	 "run until watchpoint hit"
+
+gdb_test_no_output "delete \$bpnum" "delete watchpoint"
+
+gdb_test "continue" "Continuing\\..*Breakpoint \[0-9\]+, func \\(\\) at .*$spu_file.c:.*" \
+	 "run until breakpoint hit"
+
+gdb_test "continue" "Continuing\\..*Program exited normally.*" \
+	 "run until end"
+
+gdb_exit
+
+return 0