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/**
* @file opimport.cpp
* Import sample files from other ABI
*
* @remark Copyright 2002 OProfile authors
* @remark Read the file COPYING
*
* @author Graydon Hoare
*/
#include "abi.h"
#include "odb.h"
#include "popt_options.h"
#include "op_sample_file.h"
#include <fstream>
#include <iostream>
#include <vector>
#include <cassert>
#include <cstring>
#include <cstdlib>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <cstdlib>
#include <cstring>
using namespace std;
namespace {
string output_filename;
string abi_filename;
bool verbose;
bool force;
};
popt::option options_array[] = {
popt::option(verbose, "verbose", 'V', "verbose output"),
popt::option(output_filename, "output", 'o', "output to file", "filename"),
popt::option(abi_filename, "abi", 'a', "abi description", "filename"),
popt::option(force, "force", 'f', "force conversion, even if identical")
};
struct extractor {
abi const & theabi;
unsigned char const * begin;
unsigned char const * end;
bool little_endian;
explicit
extractor(abi const & a, unsigned char const * src, size_t len)
: theabi(a), begin(src), end(src + len) {
little_endian = theabi.need(string("little_endian")) == 1;
if (verbose) {
cerr << "source byte order is: "
<< string(little_endian ? "little" : "big")
<< " endian" << endl;
}
}
template <typename T>
void extract(T & targ, void const * src_,
char const * sz, char const * off);
};
template <typename T>
void extractor::extract(T & targ, void const * src_,
char const * sz, char const * off)
{
unsigned char const * src = static_cast<unsigned char const *>(src_)
+ theabi.need(off);
size_t nbytes = theabi.need(sz);
if (nbytes == 0)
return;
assert(nbytes <= sizeof(T));
assert(src >= begin);
assert(src + nbytes <= end);
if (verbose)
cerr << hex << "get " << sz << " = " << nbytes
<< " bytes @ " << off << " = " << (src - begin)
<< " : ";
targ = 0;
if (little_endian)
while(nbytes--)
targ = (targ << 8) | src[nbytes];
else
for(size_t i = 0; i < nbytes; ++i)
targ = (targ << 8) | src[i];
if (verbose)
cerr << " = " << targ << endl;
}
void import_from_abi(abi const & abi, void const * srcv,
size_t len, odb_t * dest) throw (abi_exception)
{
struct opd_header * head =
static_cast<opd_header *>(odb_get_data(dest));
unsigned char const * src = static_cast<unsigned char const *>(srcv);
unsigned char const * const begin = src;
extractor ext(abi, src, len);
memcpy(head->magic, src + abi.need("offsetof_header_magic"), 4);
// begin extracting opd header
ext.extract(head->version, src, "sizeof_u32", "offsetof_header_version");
ext.extract(head->cpu_type, src, "sizeof_u32", "offsetof_header_cpu_type");
ext.extract(head->ctr_event, src, "sizeof_u32", "offsetof_header_ctr_event");
ext.extract(head->ctr_um, src, "sizeof_u32", "offsetof_header_ctr_um");
ext.extract(head->ctr_count, src, "sizeof_u32", "offsetof_header_ctr_count");
ext.extract(head->is_kernel, src, "sizeof_u32", "offsetof_header_is_kernel");
// "double" extraction is unlikely to work
head->cpu_speed = 0.0;
ext.extract(head->mtime, src, "sizeof_time_t", "offsetof_header_mtime");
ext.extract(head->cg_to_is_kernel, src, "sizeof_u32",
"offsetof_header_cg_to_is_kernel");
ext.extract(head->anon_start, src, "sizeof_u32",
"offsetof_header_anon_start");
ext.extract(head->cg_to_anon_start, src, "sizeof_u32",
"offsetof_header_cg_to_anon_start");
src += abi.need("sizeof_struct_opd_header");
// done extracting opd header
// begin extracting necessary parts of descr
odb_node_nr_t node_nr;
ext.extract(node_nr, src, "sizeof_odb_node_nr_t", "offsetof_descr_current_size");
src += abi.need("sizeof_odb_descr_t");
// done extracting descr
// skip node zero, it is reserved and contains nothing usefull
src += abi.need("sizeof_odb_node_t");
// begin extracting nodes
unsigned int step = abi.need("sizeof_odb_node_t");
if (verbose)
cerr << "extracting " << node_nr << " nodes of " << step << " bytes each " << endl;
assert(src + (node_nr * step) <= begin + len);
for (odb_node_nr_t i = 1 ; i < node_nr ; ++i, src += step) {
odb_key_t key;
odb_value_t val;
ext.extract(key, src, "sizeof_odb_key_t", "offsetof_node_key");
ext.extract(val, src, "sizeof_odb_value_t", "offsetof_node_value");
int rc = odb_add_node(dest, key, val);
if (rc != EXIT_SUCCESS) {
cerr << strerror(rc) << endl;
exit(EXIT_FAILURE);
}
}
// done extracting nodes
}
int main(int argc, char const ** argv)
{
vector<string> inputs;
popt::parse_options(argc, argv, inputs);
if (inputs.size() != 1) {
cerr << "error: must specify exactly 1 input file" << endl;
exit(1);
}
abi current_abi, input_abi;
{
ifstream abi_file(abi_filename.c_str());
if (!abi_file) {
cerr << "error: cannot open abi file "
<< abi_filename << endl;
exit(1);
}
abi_file >> input_abi;
}
if (!force && current_abi == input_abi) {
cerr << "input abi is identical to native. "
<< "no conversion necessary." << endl;
exit(1);
}
int in_fd;
struct stat statb;
void * in;
odb_t dest;
int rc;
assert((in_fd = open(inputs[0].c_str(), O_RDONLY)) > 0);
assert(fstat(in_fd, &statb) == 0);
assert((in = mmap(0, statb.st_size, PROT_READ,
MAP_PRIVATE, in_fd, 0)) != (void *)-1);
rc = odb_open(&dest, output_filename.c_str(), ODB_RDWR,
sizeof(struct opd_header));
if (rc) {
cerr << "odb_open() fail:\n"
<< strerror(rc) << endl;
exit(EXIT_FAILURE);
}
try {
import_from_abi(input_abi, in, statb.st_size, &dest);
} catch (abi_exception & e) {
cerr << "caught abi exception: " << e.desc << endl;
}
odb_close(&dest);
assert(munmap(in, statb.st_size) == 0);
}
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