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#!/usr/bin/perl
# IBM_PROLOG_BEGIN_TAG
# This is an automatically generated prolog.
#
# $Source: src/build/debug/Hostboot/Trace.pm $
#
# IBM CONFIDENTIAL
#
# COPYRIGHT International Business Machines Corp. 2011-2012
#
# p1
#
# Object Code Only (OCO) source materials
# Licensed Internal Code Source Materials
# IBM HostBoot Licensed Internal Code
#
# The source code for this program is not published or other-
# wise divested of its trade secrets, irrespective of what has
# been deposited with the U.S. Copyright Office.
#
# Origin: 30
#
# IBM_PROLOG_END_TAG
use strict;
package Hostboot::Trace;
use Exporter;
our @EXPORT_OK = ('main');
use constant MAX_NUM_TRACE_BUFFERS => 48;
use constant DESC_ARRAY_ENTRY_SIZE => 24;
use constant OFFSET_TRAC_BUFFER_SIZE => 20;
use constant OFFSET_BUFFER_ADDRESS => 16;
use constant BUFFER_ADDRESS_SIZE => 8;
use File::Temp ('tempfile');
sub main
{
my ($packName,$args) = @_;
if (not defined $args->{"fsp-trace"})
{
$args->{"fsp-trace"} = "fsp-trace";
}
my $fsptrace_options = "";
if (defined $args->{"with-file-names"})
{
$fsptrace_options = $fsptrace_options."-f ";
}
my $traceBuffers = $args->{"components"};
my ($symAddr, $symSize) = ::findSymbolAddress("TRACE::g_desc_array");
if (not defined $symAddr) { ::userDisplay "Cannot find symbol.\n"; die; }
my ($fh,$fname) = tempfile();
binmode($fh);
# read the entire g_desc_array instead of reading each entry which is much slower in VBU
my $result = ::readData($symAddr, $symSize);
$symAddr = 0;
my $foundBuffer = 0;
for (my $i = 0; $i < MAX_NUM_TRACE_BUFFERS; $i++)
{
# component name is first in g_desc_array[$i]
my $compName = substr $result, $symAddr, OFFSET_BUFFER_ADDRESS;
# strip off null paddings
$compName = unpack('A*', $compName);
last if ($compName eq "");
if ((not defined $traceBuffers) or (uc($traceBuffers) =~ m/$compName/))
{
# get the pointer to its trace buffer
my $buffAddr = substr $result, $symAddr + OFFSET_BUFFER_ADDRESS, BUFFER_ADDRESS_SIZE;
$buffAddr= hex (unpack('H*',$buffAddr));
# get the size of this trace buffer
my $buffSize = ::read32($buffAddr + OFFSET_TRAC_BUFFER_SIZE);
$foundBuffer = 1;
print $fh (::readData($buffAddr, $buffSize ));
}
# increment to next item in g_desc_array[]
$symAddr += DESC_ARRAY_ENTRY_SIZE;
}
if ($foundBuffer)
{
open TRACE, ($args->{"fsp-trace"}." -s ".
::getImgPath()."hbotStringFile $fsptrace_options $fname |");
while (my $line = <TRACE>)
{
::userDisplay $line;
}
}
else
{
::userDisplay("No matching buffers found.\n");
}
unlink($fname);
}
sub helpInfo
{
my %info = (
name => "Trace",
intro => ["Displays the trace buffer."],
options => {
"fsp-trace=<path>" => ["Path to non-default fsp-trace utility."],
"components=<list>" =>["Comma separated list of components to display trace",
"buffers for."],
"with-file-names" => ["Trace statements will include file name of place the",
"trace was defined."],
},
);
}
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