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#!/usr/bin/perl
# IBM_PROLOG_BEGIN_TAG
# This is an automatically generated prolog.
#
# $Source: src/build/debug/Hostboot/Ps.pm $
#
# OpenPOWER HostBoot Project
#
# COPYRIGHT International Business Machines Corp. 2011,2014
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied. See the License for the specific language governing
# permissions and limitations under the License.
#
# IBM_PROLOG_END_TAG
use strict;
package Hostboot::Ps;
use Exporter;
our @EXPORT_OK = ('main');
use constant PS_TASKMGR_SYMBOLNAME =>
"Singleton<TaskManager>::instance()::instance";
use constant PS_TASKMGR_TRACKER_LIST_OFFSET => 8 * 4;
use constant PS_TRACKER_LIST_HEAD_OFFSET => 0;
use constant PS_TRACKER_LIST_TAIL_OFFSET => 8 + PS_TRACKER_LIST_HEAD_OFFSET;
use constant PS_TRACKER_LIST_SIZE => 8 * 3;
use constant PS_TRACKER_PREV_OFFSET => 0;
use constant PS_TRACKER_NEXT_OFFSET => 8 + PS_TRACKER_PREV_OFFSET;
use constant PS_TRACKER_PARENT_OFFSET => 8 + PS_TRACKER_NEXT_OFFSET;
use constant PS_TRACKER_CHILDREN_LIST_OFFSET => 8 + PS_TRACKER_PARENT_OFFSET;
use constant PS_TRACKER_TID_OFFSET =>
PS_TRACKER_CHILDREN_LIST_OFFSET + PS_TRACKER_LIST_SIZE;
use constant PS_TRACKER_TASK_OFFSET => 8 + PS_TRACKER_TID_OFFSET;
use constant PS_TRACKER_STATUS_OFFSET => 8 + PS_TRACKER_TASK_OFFSET;
use constant PS_TRACKER_RETVAL_OFFSET => 8 + PS_TRACKER_STATUS_OFFSET;
use constant PS_TRACKER_WAITINFO_OFFSET => 8 + PS_TRACKER_RETVAL_OFFSET;
use constant PS_TRACKER_ENTRYPOINT_OFFSET => 8 + PS_TRACKER_WAITINFO_OFFSET;
use constant PS_TASK_STATE_OFFSET => 8*43;
use constant PS_TASK_STATEEXTRA_OFFSET => 8 + PS_TASK_STATE_OFFSET;
sub main
{
# Find symbol containing kernel list of task objects.
# (Tasks who's parent is the kernel)
my ($symAddr, $symSize) = ::findSymbolAddress(PS_TASKMGR_SYMBOLNAME);
if (not defined $symAddr)
{
::userDisplay "Couldn't find ".PS_TASKMGR_SYMBOLNAME;
die;
}
# Pass address of list to 'displayList' function.
$symAddr += PS_TASKMGR_TRACKER_LIST_OFFSET;
displayList($symAddr,0);
}
# Display a list of task objects.
sub displayList
{
my ($listAddr, $level) = @_;
my $firstDisplayed = 0;
# Task lists are FIFO, so start from the 'tail'.
my $node = ::read64(PS_TRACKER_LIST_TAIL_OFFSET + $listAddr);
while (0 != $node)
{
if ($firstDisplayed)
{
::userDisplay makeTabs($level)."\n";
}
else
{
$firstDisplayed = 1;
}
# Display tracker object for this node.
displayTracker($node, $level);
# Follow pointer to the next node.
$node = ::read64(PS_TRACKER_PREV_OFFSET + $node);
}
}
sub displayTracker
{
my ($trackAddr, $level) = @_;
# Read TID.
my $tid = ::read16(PS_TRACKER_TID_OFFSET + $trackAddr);
# Determine entry-point symbol name / module.
my $entryPoint = ::read64(PS_TRACKER_ENTRYPOINT_OFFSET + $trackAddr);
my $entryPointName = ::findSymbolByAddress($entryPoint);
if (not $entryPointName) { $entryPointName = sprintf "0x%x",$entryPoint; }
my $moduleName = ::findModuleByAddress($entryPoint);
# Find task object, read task state if task is still running.
my $taskAddr = ::read64(PS_TRACKER_TASK_OFFSET + $trackAddr);
my $state = "";
if ($taskAddr)
{
$state = pack("C",::read8(PS_TASK_STATE_OFFSET + $taskAddr));
}
else
{
$state = "Z";
}
my $stateExtra = ""; # Parse state extra debug info if it exists.
if (($state ne "R") and ($state ne "r") and
($state ne "E") and ($state ne "Z"))
{
$stateExtra = sprintf "(0x%x)",
::read64(PS_TASK_STATEEXTRA_OFFSET + $taskAddr);
}
elsif ($state eq "Z")
{
# If task has exited, read status and retval.
my $status = ::read32(PS_TRACKER_STATUS_OFFSET + $trackAddr);
my $retval = ::read64(PS_TRACKER_RETVAL_OFFSET + $trackAddr);
if ($status) { $stateExtra = "(Crashed)"; }
elsif ($retval) { $stateExtra = (sprintf "(0x%x)", $retval); }
}
# Map state to an verbose description.
my %states = ( "R" => "Running",
"r" => "Ready",
"E" => "Ended",
"f" => "Block on Futex",
"M" => "Block on Message",
"u" => "Block on Userspace Request",
"s" => "Block on Sleeping",
"j" => "Block on Join",
"Z" => "Zombie",
);
$state = $states{$state};
# Display task info obtained.
::userDisplay makeTabs($level)."-+ TID $tid State: $state$stateExtra\n";
::userDisplay makeTabs($level)." | $entryPointName [$moduleName]\n";
# Display list of children tasks.
displayList($trackAddr + PS_TRACKER_CHILDREN_LIST_OFFSET, $level + 1);
}
sub makeTabs
{
my $level = shift;
my $result = "";
while (0 != $level)
{
$result = $result." |";
$level = $level - 1;
}
return $result;
}
sub helpInfo
{
my %info = (
name => "Ps",
intro => ["Displays a tree of all tasks and their current state."],
);
}
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