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/*! @file TraceWriterQEMU.cc
* @brief TraceWriterQEMU Implementation
*
* This file contains the implementation of the functions supporting
* reading the QEMU coverage data files.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "app_common.h"
#include "TraceWriterQEMU.h"
#include "ExecutableInfo.h"
#include "CoverageMap.h"
/* XXX really not always right */
typedef uint32_t target_ulong;
#include "qemu-traces.h"
/* hack so this can compile on old Linux versions and FreeBSD */
#if (__GNUC__ <= 2) || defined(__FreeBSD__)
#define STAT stat
#define OPEN fopen
#else
#define STAT stat64
#define OPEN fopen64
#endif
namespace Trace {
TraceWriterQEMU::TraceWriterQEMU():
TraceWriterBase()
{
}
TraceWriterQEMU::~TraceWriterQEMU()
{
}
bool TraceWriterQEMU::writeFile(
const char* const file,
Trace::TraceReaderBase *log
)
{
struct trace_header header;
int status;
FILE* traceFile;
uint8_t taken;
uint8_t notTaken;
taken = TargetInfo->qemuTakenBit();
notTaken = TargetInfo->qemuNotTakenBit();
//
// Verify that the TraceList has a non-zero size.
//
if ( log->Trace.set.begin() == log->Trace.set.end() ){
fprintf( stderr, "ERROR: Empty TraceList\n" );
return false;
}
//
// Open the trace file.
//
traceFile = OPEN( file, "w" );
if (!traceFile) {
fprintf( stderr, "Unable to open %s\n", file );
return false;
}
//
// Write the Header to the file
//
sprintf( header.magic, "%s", QEMU_TRACE_MAGIC );
header.version = QEMU_TRACE_VERSION;
header.kind = QEMU_TRACE_KIND_RAW; // XXX ??
header.sizeof_target_pc = 32;
header.big_endian = false;
header.machine[0] = 0; // XXX ??
header.machine[1] = 0; // XXX ??
status = fwrite( &header, sizeof(trace_header), 1, traceFile );
if (status != 1) {
fprintf( stderr, "Unable to write header to %s\n", file );
return false;
}
if (Verbose)
fprintf(
stderr,
"magic = %s\n"
"version = %d\n"
"kind = %d\n"
"sizeof_target_pc = %d\n"
"big_endian = %d\n"
"machine = %02x:%02x\n",
header.magic,
header.version,
header.kind,
header.sizeof_target_pc,
header.big_endian,
header.machine[0], header.machine[1]
);
//
// Loop through log and write each entry.
//
struct trace_entry32 entry;
TraceList::ranges_t::iterator itr;
for (itr = log->Trace.set.begin(); (itr != log->Trace.set.end()); itr++ ){
entry.pc = itr->lowAddress;
entry.size = itr-> length;
entry.op = TRACE_OP_BLOCK;
switch (itr->exitReason) {
case TraceList::EXIT_REASON_BRANCH_TAKEN:
entry.op |= taken;
break;
case TraceList::EXIT_REASON_BRANCH_NOT_TAKEN:
entry.op |= notTaken;
break;
case TraceList::EXIT_REASON_OTHER:
break;
default:
fprintf(stderr, "Unknown exit Reason\n");
exit(1);
break;
}
if ( Verbose )
fprintf(stderr, "%x %x %x\n", entry.pc, entry.size, entry.op);
status = fwrite( &entry, sizeof(entry), 1, traceFile );
if (status != 1) {
fprintf( stderr, "Unable to emtry to %s\n", file );
return false;
}
}
fclose( traceFile );
return true;
}
}
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