From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Fri, 27 Oct 2017 21:07:50 +0200
Subject: gdb-6.3-threaded-watchpoints2-20050225.patch
;; Test sibling threads to set threaded watchpoints for x86 and x86-64
;;=fedoratest
2005-02-28 Jeff Johnston <jjohnstn@redhat.com>
* config/i386/nm-linux.h: Change dr register routines to
accept a ptid_t first argument. Change all calling macros
to default the inferior_ptid for the first argument.
(i386_linux_insert_watchpoint): New prototype.
(i386_linux_remove_watchpoint, i386_linux_insert_hw_breakpoint): Ditto.
(i386_linux_remove_hw_breakpoint): Ditto.
(target_insert_watchpoint, target_remove_watchpoint): Undef and
override.
(target_insert_hw_breakpoint, target_remove_hw_breakpoint): Ditto.
* config/i386/nm-linux64.h: Ditto except add amd64 versions of
the watchpoint/hw-breakpoint insert/remove routines.
* i386-nat.c: Include "inferior.h" to define inferior_ptid.
* i386-linux-nat.c: Change all dr get/set routines to accept
ptid_t as first argument and to use this argument to determine
the tid for PTRACE.
(i386_linux_set_debug_regs_for_thread): New function.
(i386_linux_sync_debug_registers_callback): Ditto.
(i386_linux_sync_debug_registers_across_threads): Ditto.
(i386_linux_insert_watchpoint, i386_linux_remove_watchpoint): Ditto.
(i386_linux_hw_breakpoint, i386_linux_remove_hw_breakpoint): Ditto.
(i386_linux_new_thread): Ditto.
(_initialize_i386_linux_nat): Ditto.
* amd64-linux-nat.c: Change all dr get/set routines to accept
ptid_t as first argument and to use this argument to determine
the tid for PTRACE.
(amd64_linux_set_debug_regs_for_thread): New function.
(amd64_linux_sync_debug_registers_callback): Ditto.
(amd64_linux_sync_debug_registers_across_threads): Ditto.
(amd64_linux_insert_watchpoint, amd64_linux_remove_watchpoint): Ditto.
(amd64_linux_hw_breakpoint, amd64_linux_remove_hw_breakpoint): Ditto.
(amd64_linux_new_thread): Ditto.
(_initialize_amd64_linux_nat): Register linux new thread observer.
* testsuite/gdb.threads/watchthreads-threaded.c: New test case.
* testsuite/gdb.threads/watchthreads-threaded.exp: Ditto.
[ With recent upstream GDB (6.8) reduced only to the testcase. ]
[ It was called watchthreads2.{exp,c} before but it conflicted with FSF GDB new
testcase of the same name. ]
FIXME: The testcase does not expects multiple watchpoints hits per one stop.
diff --git a/gdb/testsuite/gdb.threads/watchthreads-threaded.c b/gdb/testsuite/gdb.threads/watchthreads-threaded.c
new file mode 100644
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/watchthreads-threaded.c
@@ -0,0 +1,65 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2002, 2003, 2004, 2005 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 2 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+
+ This file is copied from schedlock.c. */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+void *thread_function(void *arg); /* Pointer to function executed by each thread */
+
+#define NUM 5
+
+unsigned int args[NUM+1];
+
+int main() {
+ int res;
+ pthread_t threads[NUM];
+ void *thread_result;
+ long i;
+
+ for (i = 0; i < NUM; i++)
+ {
+ args[i] = 1; /* Init value. */
+ res = pthread_create(&threads[i],
+ NULL,
+ thread_function,
+ (void *) i);
+ }
+
+ args[i] = 1;
+ thread_function ((void *) i);
+
+ exit(EXIT_SUCCESS);
+}
+
+void *thread_function(void *arg) {
+ int my_number = (long) arg;
+ int *myp = (int *) &args[my_number];
+
+ /* Don't run forever. Run just short of it :) */
+ while (*myp > 0)
+ {
+ (*myp) ++; usleep (1); /* Loop increment. */
+ }
+
+ pthread_exit(NULL);
+}
diff --git a/gdb/testsuite/gdb.threads/watchthreads-threaded.exp b/gdb/testsuite/gdb.threads/watchthreads-threaded.exp
new file mode 100644
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/watchthreads-threaded.exp
@@ -0,0 +1,126 @@
+# This testcase is part of GDB, the GNU debugger.
+
+# Copyright 2005 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 2 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, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+# Check that GDB can support multiple watchpoints across threads.
+
+# This test verifies that a watchpoint is detected in the proper thread
+# so the test is only meaningful on a system with hardware watchpoints.
+if [target_info exists gdb,no_hardware_watchpoints] {
+ return 0;
+}
+
+set testfile "watchthreads-threaded"
+set srcfile ${testfile}.c
+set binfile [standard_output_file ${testfile}]
+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
+ return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+gdb_test "set can-use-hw-watchpoints 1" "" ""
+
+#
+# Run to `main' where we begin our tests.
+#
+
+if ![runto_main] then {
+ gdb_suppress_tests
+}
+
+set args_2 0
+set args_3 0
+
+gdb_breakpoint "thread_function"
+gdb_continue_to_breakpoint "thread_function"
+gdb_test "disable 2" ""
+
+gdb_test_multiple "p args\[2\]" "get initial args2" {
+ -re "\\\$\[0-9\]* = (.*)$gdb_prompt $" {
+ set init_args_2 $expect_out(1,string)
+ pass "get initial args2"
+ }
+}
+
+gdb_test_multiple "p args\[3\]" "get initial args3" {
+ -re "\\\$\[0-9\]* = (.*)$gdb_prompt $" {
+ set init_args_3 $expect_out(1,string)
+ pass "get initial args3"
+ }
+}
+
+set args_2 $init_args_2
+set args_3 $init_args_3
+
+# Watch values that will be modified by distinct threads.
+gdb_test "watch args\[2\]" "Hardware watchpoint 3: args\\\[2\\\]"
+gdb_test "watch args\[3\]" "Hardware watchpoint 4: args\\\[3\\\]"
+
+set init_line [expr [gdb_get_line_number "Init value"]+1]
+set inc_line [gdb_get_line_number "Loop increment"]
+
+# Loop and continue to allow both watchpoints to be triggered.
+for {set i 0} {$i < 30} {incr i} {
+ set test_flag 0
+ gdb_test_multiple "continue" "threaded watch loop" {
+ -re "Hardware watchpoint 3: args\\\[2\\\].*Old value = 0.*New value = 1.*main \\\(\\\) at .*watchthreads-threaded.c:$init_line.*$gdb_prompt $"
+ { set args_2 1; set test_flag 1 }
+ -re "Hardware watchpoint 4: args\\\[3\\\].*Old value = 0.*New value = 1.*main \\\(\\\) at .*watchthreads-threaded.c:$init_line.*$gdb_prompt $"
+ { set args_3 1; set test_flag 1 }
+ -re "Hardware watchpoint 3: args\\\[2\\\].*Old value = $args_2.*New value = [expr $args_2+1].*thread_function \\\(arg=0x2\\\) at .*watchthreads-threaded.c:$inc_line.*$gdb_prompt $"
+ { set args_2 [expr $args_2+1]; set test_flag 1 }
+ -re "Hardware watchpoint 4: args\\\[3\\\].*Old value = $args_3.*New value = [expr $args_3+1].*thread_function \\\(arg=0x3\\\) at .*watchthreads-threaded.c:$inc_line.*$gdb_prompt $"
+ { set args_3 [expr $args_3+1]; set test_flag 1 }
+ }
+ # If we fail above, don't bother continuing loop
+ if { $test_flag == 0 } {
+ set i 30;
+ }
+}
+
+# Print success message if loop succeeded.
+if { $test_flag == 1 } {
+ pass "threaded watch loop"
+}
+
+# Verify that we hit first watchpoint in child thread.
+set message "watchpoint on args\[2\] hit in thread"
+if { $args_2 > 1 } {
+ pass $message
+} else {
+ fail $message
+}
+
+# Verify that we hit second watchpoint in child thread.
+set message "watchpoint on args\[3\] hit in thread"
+if { $args_3 > 1 } {
+ pass $message
+} else {
+ fail $message
+}
+
+# Verify that all watchpoint hits are accounted for.
+set message "combination of threaded watchpoints = 30 + initial values"
+if { [expr $args_2+$args_3] == [expr [expr 30+$init_args_2]+$init_args_3] } {
+ pass $message
+} else {
+ fail $message
+}