From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Andrew Cagney <cagney@gnu.org>

Date: Fri, 27 Oct 2017 21:07:50 +0200

Subject: gdb-6.3-gstack-20050411.patch

;; Add a wrapper script to GDB that implements pstack using the

;; --readnever option.

;;=push

2004-11-23  Andrew Cagney  <cagney@redhat.com>

	* Makefile.in (uninstall-gstack, install-gstack): New rules, add

	to install and uninstall.

	* gstack.sh, gstack.1: New files.

diff --git a/gdb/Makefile.in b/gdb/Makefile.in

--- a/gdb/Makefile.in

+++ b/gdb/Makefile.in

@@ -1753,7 +1753,7 @@ info install-info clean-info dvi pdf install-pdf html install-html: force

 install: all

 	@$(MAKE) $(FLAGS_TO_PASS) install-only

-install-only: $(CONFIG_INSTALL)

+install-only: install-gstack $(CONFIG_INSTALL)

 	transformed_name=`t='$(program_transform_name)'; \

 			  echo gdb | sed -e "$$t"` ; \

 		if test "x$$transformed_name" = x; then \

@@ -1802,7 +1802,25 @@ install-guile:

 install-python:

 	$(SHELL) $(srcdir)/../mkinstalldirs $(DESTDIR)$(GDB_DATADIR)/python/gdb

-uninstall: force $(CONFIG_UNINSTALL)

+GSTACK=gstack

+.PHONY: install-gstack

+install-gstack:

+	transformed_name=`t='$(program_transform_name)'; \

+			  echo $(GSTACK) | sed -e "$$t"` ; \

+		if test "x$$transformed_name" = x; then \

+		  transformed_name=$(GSTACK) ; \

+		else \

+		  true ; \

+		fi ; \

+		$(SHELL) $(srcdir)/../mkinstalldirs $(DESTDIR)$(bindir) ; \

+		$(INSTALL_PROGRAM) $(srcdir)/$(GSTACK).sh \

+			$(DESTDIR)$(bindir)/$$transformed_name$(EXEEXT) ; \

+		: $(SHELL) $(srcdir)/../mkinstalldirs \

+			$(DESTDIR)$(man1dir) ; \

+		: $(INSTALL_DATA) $(srcdir)/gstack.1 \

+			$(DESTDIR)$(man1dir)/$$transformed_name.1

+

+uninstall: force uninstall-gstack $(CONFIG_UNINSTALL)

 	transformed_name=`t='$(program_transform_name)'; \

 			  echo gdb | sed -e $$t` ; \

 		if test "x$$transformed_name" = x; then \

@@ -1825,6 +1843,18 @@ uninstall: force $(CONFIG_UNINSTALL)

 	fi

 	@$(MAKE) DO=uninstall "DODIRS=$(SUBDIRS)" $(FLAGS_TO_PASS) subdir_do

+.PHONY: uninstall-gstack

+uninstall-gstack:

+	transformed_name=`t='$(program_transform_name)'; \

+			  echo $(GSTACK) | sed -e $$t` ; \

+		if test "x$$transformed_name" = x; then \

+		  transformed_name=$(GSTACK) ; \

+		else \

+		  true ; \

+		fi ; \

+		rm -f $(DESTDIR)$(bindir)/$$transformed_name$(EXEEXT) \

+		      $(DESTDIR)$(man1dir)/$$transformed_name.1

+

 # The C++ name parser can be built standalone for testing.

 test-cp-name-parser.o: cp-name-parser.c

 	$(COMPILE) -DTEST_CPNAMES cp-name-parser.c

diff --git a/gdb/gstack.sh b/gdb/gstack.sh

new file mode 100644

--- /dev/null

+++ b/gdb/gstack.sh

@@ -0,0 +1,43 @@

+#!/bin/sh

+

+if test $# -ne 1; then

+    echo "Usage: `basename $0 .sh` <process-id>" 1>&2

+    exit 1

+fi

+

+if test ! -r /proc/$1; then

+    echo "Process $1 not found." 1>&2

+    exit 1

+fi

+

+# GDB doesn't allow "thread apply all bt" when the process isn't

+# threaded; need to peek at the process to determine if that or the

+# simpler "bt" should be used.

+

+backtrace="bt"

+if test -d /proc/$1/task ; then

+    # Newer kernel; has a task/ directory.

+    if test `/bin/ls /proc/$1/task | /usr/bin/wc -l` -gt 1 2>/dev/null ; then

+	backtrace="thread apply all bt"

+    fi

+elif test -f /proc/$1/maps ; then

+    # Older kernel; go by it loading libpthread.

+    if /bin/grep -e libpthread /proc/$1/maps > /dev/null 2>&1 ; then

+	backtrace="thread apply all bt"

+    fi

+fi

+

+GDB=${GDB:-gdb}

+

+# Run GDB, strip out unwanted noise.

+# --readnever is no longer used since .gdb_index is now in use.

+$GDB --quiet -nx $GDBARGS /proc/$1/exe $1 <<EOF 2>&1 |

+set width 0

+set height 0

+set pagination no

+$backtrace

+EOF

+/bin/sed -n \

+    -e 's/^\((gdb) \)*//' \

+    -e '/^#/p' \

+    -e '/^Thread/p'

diff --git a/gdb/testsuite/gdb.base/gstack.c b/gdb/testsuite/gdb.base/gstack.c

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/gstack.c

@@ -0,0 +1,43 @@

+/* This testcase is part of GDB, the GNU debugger.

+

+   Copyright 2005, 2007, 2008, 2009 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/>.  */

+

+#include <stdio.h>

+#include <unistd.h>

+#include <string.h>

+

+void

+func (void)

+{

+  const char msg[] = "looping\n";

+

+  /* Use the most simple notification not to get caught by attach on exiting

+     the function.  */

+  write (1, msg, strlen (msg));

+

+  for (;;);

+}

+

+int

+main (void)

+{

+  alarm (60);

+  nice (100);

+

+  func ();

+

+  return 0;

+}

diff --git a/gdb/testsuite/gdb.base/gstack.exp b/gdb/testsuite/gdb.base/gstack.exp

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/gstack.exp

@@ -0,0 +1,84 @@

+# Copyright (C) 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/>.

+

+set testfile gstack

+set executable ${testfile}

+set binfile [standard_output_file $executable]

+if {[build_executable ${testfile} ${executable} "" {debug}] == -1} {

+    return -1

+}

+

+set test "spawn inferior"

+set command "${binfile}"

+set res [remote_spawn host $command];

+if { $res < 0 || $res == "" } {

+    perror "Spawning $command failed."

+    fail $test

+    return

+}

+

+# The spawn id of the test inferior.

+set test_spawn_id $res

+

+set use_gdb_stub 1

+set pid [exp_pid -i $res]

+gdb_expect {

+    -re "looping\r\n" {

+	pass $test

+    }

+    eof {

+	fail "$test (eof)"

+	return

+    }

+    timeout {

+	fail "$test (timeout)"

+	return

+    }

+}

+

+# Testcase uses the most simple notification not to get caught by attach on

+# exiting the function.  Still we could retry the gstack command if we fail.

+

+set test "spawn gstack"

+set command "sh -c GDB=$GDB\\ GDBARGS=-data-directory\\\\\\ $BUILD_DATA_DIRECTORY\\ sh\\ ${srcdir}/../gstack.sh\\ $pid\\;echo\\ GSTACK-END"

+set res [remote_spawn host $command];

+if { $res < 0 || $res == "" } {

+    perror "Spawning $command failed."

+    fail $test

+}

+

+set gdb_spawn_id $res

+

+gdb_test_multiple "" $test {

+    -re "^#0 +(0x\[0-9a-f\]+ in )?\\.?func \\(\\) at \[^\r\n\]*\r\n#1 +0x\[0-9a-f\]+ in \\.?main \\(\\) at \[^\r\n\]*\r\nGSTACK-END\r\n\$" {

+	pass $test

+    }

+}

+

+gdb_test_multiple "" "gstack exits" {

+    eof {

+	set result [wait -i $gdb_spawn_id]

+	verbose $result

+

+	gdb_assert { [lindex $result 2] == 0 } "gstack exits with no error"

+	gdb_assert { [lindex $result 3] == 0 } "gstack's exit status is 0"

+

+	remote_close host

+	clear_gdb_spawn_id

+    }

+}

+

+# Kill the test inferior.

+kill_wait_spawned_process $test_spawn_id