profile_container.cpp

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#include <set>
#include <vector>
#include <string>
#include <iostream>
#include <sstream>
#include <algorithm>
#include <numeric>

#include "symbol.h"
#include "op_header.h"
#include "profile.h"
#include "symbol_functors.h"
#include "profile_container.h"
#include "sample_container.h"
#include "symbol_container.h"
#include "populate_for_spu.h"

using namespace std;

namespace {

struct filename_by_samples {
    filename_by_samples(debug_name_id id, double percent_)
        : filename(id), percent(percent_)
        {}

    bool operator<(filename_by_samples const & lhs) const {
        if (percent != lhs.percent)
            return percent < lhs.percent;
        return filename < lhs.filename;
    }

    debug_name_id filename;
    // ratio of samples which belongs to this filename.
    double percent;
};

}  // anon namespace


profile_container::profile_container(bool debug_info_, bool need_details_,
                     extra_images const & extra_)
    :
    symbols(new symbol_container),
    samples(new sample_container),
    debug_info(debug_info_),
    need_details(need_details_),
    extra_found_images(extra_)
{
}


profile_container::~profile_container()
{
}
 

// Post condition:
//  the symbols/samples are sorted by increasing vma.
//  the range of sample_entry inside each symbol entry are valid
//  the samples_by_file_loc member var is correctly setup.
void profile_container::add(profile_t const & profile,
                            op_bfd const & abfd, string const & app_name,
                            size_t pclass)
{
    string const image_name = abfd.get_filename();
    opd_header header = profile.get_header();

    for (symbol_index_t i = 0; i < abfd.syms.size(); ++i) {

        unsigned long long start = 0, end = 0;
        symbol_entry symb_entry;

        abfd.get_symbol_range(i, start, end);

        profile_t::iterator_pair p_it =
            profile.samples_range(start, end);
        count_type count = accumulate(p_it.first, p_it.second, 0ull);

        // skip entries with no samples
        if (count == 0)
            continue;

        symb_entry.sample.counts[pclass] = count;
        total_count[pclass] += count;

        symb_entry.size = end - start;

        symb_entry.name = symbol_names.create(abfd.syms[i].name());
        symb_entry.sym_index = i;
        symb_entry.vma_adj = abfd.get_vma_adj();

        symb_entry.sample.file_loc.linenr = 0;
        if (debug_info) {
            string filename;
            if (abfd.get_linenr(i, start, filename,
                symb_entry.sample.file_loc.linenr)) {
                symb_entry.sample.file_loc.filename =
                    debug_names.create(filename);
            }
        }

        symb_entry.image_name = image_names.create(image_name);
        symb_entry.app_name = image_names.create(app_name);

        symb_entry.sample.vma = abfd.syms[i].vma();
        if ((header.spu_profile == cell_spu_profile) &&
            header.embedded_offset) {
            symb_entry.spu_offset = header.embedded_offset;
            symb_entry.embedding_filename =
                image_names.create(abfd.get_embedding_filename());
        } else {
            symb_entry.spu_offset = 0;
        }
        symbol_entry const * symbol = symbols->insert(symb_entry);

        if (need_details)
            add_samples(abfd, i, p_it, symbol, pclass, start);
    }
}


void
profile_container::add_samples(op_bfd const & abfd, symbol_index_t sym_index,
                               profile_t::iterator_pair const & p_it,
                               symbol_entry const * symbol, size_t pclass,
                   unsigned long start)
{
    bfd_vma base_vma = abfd.syms[sym_index].vma();

    profile_t::const_iterator it;
    for (it = p_it.first; it != p_it.second ; ++it) {
        sample_entry sample;

        sample.counts[pclass] = it.count();

        sample.file_loc.linenr = 0;
        if (debug_info) {
            string filename;
            if (abfd.get_linenr(sym_index, it.vma(), filename,
                    sample.file_loc.linenr)) {
                sample.file_loc.filename =
                    debug_names.create(filename);
            }
        }

        sample.vma = (it.vma() - start) + base_vma;

        samples->insert(symbol, sample);
    }
}


symbol_collection const
profile_container::select_symbols(symbol_choice & choice) const
{
    symbol_collection result;

    double const threshold = choice.threshold / 100.0;

    symbol_container::symbols_t::iterator it = symbols->begin();
    symbol_container::symbols_t::iterator const end = symbols->end();

    for (; it != end; ++it) {
        if (choice.match_image
            && (image_names.name(it->image_name) != choice.image_name))
            continue;

        double const percent =
            op_ratio(it->sample.counts[0], total_count[0]);

        if (percent >= threshold) {
            result.push_back(&*it);

            choice.hints = it->output_hint(choice.hints);
        }
    }

    return result;
}


vector<debug_name_id> const
profile_container::select_filename(double threshold) const
{
    set<debug_name_id> filename_set;

    threshold /= 100.0;

    // Trying to iterate on symbols to create the set of filenames which
    // contain sample does not work: a symbol can contain samples and this
    // symbol is in a source file that contain zero sample because only
    // inline function in this source file contains samples.
    sample_container::samples_iterator sit = samples->begin();
    sample_container::samples_iterator const send = samples->end();

    for (; sit != send; ++sit) {
        debug_name_id name_id = sit->second.file_loc.filename;
        if (name_id.set())
            filename_set.insert(name_id);
    }

    // Give a sort order on filename for the selected pclass.
    vector<filename_by_samples> file_by_samples;

    set<debug_name_id>::const_iterator it = filename_set.begin();
    set<debug_name_id>::const_iterator const end = filename_set.end();
    for (; it != end; ++it) {
        // FIXME: is samples_count() the right interface now ?
        count_array_t counts = samples_count(*it);

        double const ratio = op_ratio(counts[0], total_count[0]);
        filename_by_samples const f(*it, ratio);

        file_by_samples.push_back(f);
    }

    // now sort the file_by_samples entry.
    sort(file_by_samples.begin(), file_by_samples.end());

    // 2.91.66 doesn't like const_reverse_iterator in this context
    vector<filename_by_samples>::reverse_iterator cit
        = file_by_samples.rbegin();
    vector<filename_by_samples>::reverse_iterator const cend
        = file_by_samples.rend();

    vector<debug_name_id> result;
    for (; cit != cend; ++cit) {
        if (cit->percent >= threshold)
            result.push_back(cit->filename);
    }

    return result;
}


count_array_t profile_container::samples_count() const
{
    return total_count;
}


// Rest here are delegated to our private implementation.

symbol_entry const *
profile_container::find_symbol(string const & image_name, bfd_vma vma) const
{
    return symbols->find_by_vma(image_name, vma);
}


symbol_collection const
profile_container::find_symbol(debug_name_id filename, size_t linenr) const
{
    return symbols->find(filename, linenr);
}


symbol_collection const
profile_container::select_symbols(debug_name_id filename) const
{
    return symbols->find(filename);
}

sample_entry const *
profile_container::find_sample(symbol_entry const * symbol, bfd_vma vma) const
{
    return samples->find_by_vma(symbol, vma);
}


count_array_t profile_container::samples_count(debug_name_id filename_id) const
{
    return samples->accumulate_samples(filename_id);
}


count_array_t profile_container::samples_count(debug_name_id filename,
                    size_t linenr) const
{
    return samples->accumulate_samples(filename, linenr);
}


sample_container::samples_iterator
profile_container::begin(symbol_entry const * symbol) const
{
    return samples->begin(symbol);
}


sample_container::samples_iterator
profile_container::end(symbol_entry const * symbol) const
{
    return samples->end(symbol);
}


sample_container::samples_iterator profile_container::begin() const
{
    return samples->begin();
}


sample_container::samples_iterator profile_container::end() const
{
    return samples->end();
}

symbol_entry const * profile_container::find(symbol_entry const & symbol) const
{
    return symbols->find(symbol);
}

symbol_container::symbols_t::iterator profile_container::begin_symbol() const
{
    return symbols->begin();
}

symbol_container::symbols_t::iterator profile_container::end_symbol() const
{
    return symbols->end();
}