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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/errl/plugins/errludbacktrace.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* COPYRIGHT International Business Machines Corp. 2012,2014 */
/* */
/* 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 */
#ifndef ERRL_UDBACKTRACE_H
#define ERRL_UDBACKTRACE_H
/**
* @file errludbacktrace.H
*
* Defines the ErrlUserDetailsParserBackTrace class that parses backtrace FFDC
* user detail in an error log
*/
#include "errluserdetails.H"
#include "symbols.H"
#include <vector>
namespace ERRORLOG
{
/**
* @class ErrlUserDetailsParserBackTrace
*
* Parses backtrace user detail in an error log
*/
class ErrlUserDetailsParserBackTrace : public ErrlUserDetailsParser
{
public:
/**
* @brief Constructor
*/
ErrlUserDetailsParserBackTrace() {}
/**
* @brief Destructor
*/
virtual ~ErrlUserDetailsParserBackTrace() {}
/**
* @brief Parses backtrace user detail data from an error log
*
* @param i_version Version of the data
* @param i_parse ErrlUsrParser object for outputting information
* @param i_pBuffer Pointer to buffer containing detail data
* @param i_buflen Length of the buffer
*/
virtual void parse(errlver_t i_version,
ErrlUsrParser & i_parser,
void * i_pBuffer,
const uint32_t i_buflen) const
{
// This buffer contains a number of 64-bit frame pointers.
// A character vector for storing a backtrace entry and the space
// required for the header (frame number and address (with some padding
// for safety)) and the symbol name. This vector is resized if a longer
// symbol name is encountered.
const uint8_t BACKTRACE_ENTRY_HEADER_SIZE = 32;
const uint8_t BACKTRACE_ENTRY_SYMBOL_SIZE = 64;
std::vector<char> l_traceEntry(BACKTRACE_ENTRY_HEADER_SIZE +
BACKTRACE_ENTRY_SYMBOL_SIZE);
// Initialize l_the symbol table.
const char * const l_pNfsSymFile = "/nfs/data/hbicore.syms";
hbSymbolTable symTab;
int readRC = symTab.readSymbols( l_pNfsSymFile );
if( readRC )
{
// Not found in NFS, look in maint for symbol file
const char * const l_pMaintSymFile = "/maint/data/hbicore.syms";
readRC = symTab.readSymbols( l_pMaintSymFile );
if( readRC )
{
// Not found in maint, look in pwd
const char * const l_pPwdSymFile = "hbicore.syms";
readRC = symTab.readSymbols( l_pPwdSymFile );
if( readRC )
{
i_parser.PrintString( "Symbols not found", l_pPwdSymFile );
// symTab.nearestSymbol() will return NULL because of this.
// Carry on.
}
}
}
const char * l_pErrlEntry = "ErrlEntry::ErrlEntry";
const char * l_pLabel = "Backtrace";
// loop thru the buffer which is an array of 64-bit addresses
uint64_t * p64 = static_cast<uint64_t *>(i_pBuffer);
int l_count = i_buflen / sizeof( uint64_t );
for( int i = 0; i < l_count; i++ )
{
// endian convert the stack address
uint64_t l_addr = ntohll(*p64);
// get nearest symbol
const char * l_pSymbol = symTab.nearestSymbol( l_addr );
if( l_pSymbol )
{
if( strstr( l_pSymbol, l_pErrlEntry ))
{
// hackish, makes for better looking output
// it's in every backtrace (jan2012)
l_pSymbol = l_pErrlEntry;
}
uint16_t l_traceSize =
(BACKTRACE_ENTRY_HEADER_SIZE + strlen(l_pSymbol) + 1);
if (l_traceEntry.size() < l_traceSize)
{
l_traceEntry.resize(l_traceSize);
}
sprintf(&(l_traceEntry[0]),
"#%2d %016llX %s", i, l_addr, l_pSymbol);
}
else
{
sprintf(&(l_traceEntry[0]),"#%2d %016llX", i, l_addr);
}
i_parser.PrintString( l_pLabel, &(l_traceEntry[0]) );
// next stack address in the buffer
p64++;
// don't print the label for subsequent backtraces
l_pLabel = "";
}
}
private:
// Disabled
ErrlUserDetailsParserBackTrace(const ErrlUserDetailsParserBackTrace &);
ErrlUserDetailsParserBackTrace & operator=(
const ErrlUserDetailsParserBackTrace &);
};
}
#endif
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