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gdb-6.3-threaded-watchpoints2-20050225.patch
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File gdb-6.3-threaded-watchpoints2-20050225.patch of Package gdb
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 FileName: 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. --- gdb/testsuite/gdb.threads/watchthreads-threaded.c | 66 +++++++++++ .../gdb.threads/watchthreads-threaded.exp | 126 +++++++++++++++++++++ 2 files changed, 192 insertions(+) create mode 100644 gdb/testsuite/gdb.threads/watchthreads-threaded.c create mode 100644 gdb/testsuite/gdb.threads/watchthreads-threaded.exp diff --git a/gdb/testsuite/gdb.threads/watchthreads-threaded.c b/gdb/testsuite/gdb.threads/watchthreads-threaded.c new file mode 100644 index 0000000000..1402640ccf --- /dev/null +++ b/gdb/testsuite/gdb.threads/watchthreads-threaded.c @@ -0,0 +1,66 @@ +/* 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 index 0000000000..e9cdd59771 --- /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].*in 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].*in 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 +} -- 2.14.3
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