C++ Extent::size方法代码示例

/** Returns a list of parts of a single section that have been referenced.  The offsets are relative to the start of the
 *  section. */
ExtentMap
SgAsmGenericSection::get_referenced_extents() const
{
    ExtentMap retval;
    if (0==get_size())
        return retval;

    Extent s(get_offset(), get_size());
    const ExtentMap &file_extents = get_file()->get_referenced_extents();
    for (ExtentMap::const_iterator i=file_extents.begin(); i!=file_extents.end(); i++) {
        Extent e = i->first;
        if (e.contained_in(s)) {
            retval.insert(Extent(e.first()-get_offset(), e.size()));
        } else if (e.left_of(s) || e.right_of(s)) {
            /*void*/
        } else if (e.contains(s)) {
            retval.insert(Extent(0, get_size()));
        } else if (e.begins_before(s)) {
            retval.insert(Extent(0, e.first()+e.size()-get_offset()));
        } else if (e.ends_after(s)) {
            retval.insert(Extent(e.first()-get_offset(), get_offset()+get_size()-e.first()));
        } else {
            assert(!"invalid extent overlap category");
            abort();
        }
    }
    return retval;
}

/** Write just the specified regions back to the file */
void
SgAsmGenericSection::unparse(std::ostream &f, const ExtentMap &map) const
{
    for (ExtentMap::const_iterator i=map.begin(); i!=map.end(); ++i) {
        Extent e = i->first;
        assert(e.first()+e.size() <= get_size());
        const unsigned char *extent_data;
        if (e.first() >= p_data.size()) {
            extent_data = NULL;
        } else if (e.first() + e.size() > p_data.size()) {
            extent_data = &p_data[e.first()];
        } else {
            extent_data = &p_data[e.first()];
        }
        if (extent_data)
            write(f, e.first(), e.size(), extent_data);
    }
}

/** Class method comparing two extents. The return value is one of the following letters, depending on how extent A is related
 *  to extent B:
 *     C (congruent):  A and B are congruent
 *     L (left):       A is left of B
 *     R (right):      A is right of B
 *     O (outer):      A contains B, but A and B are not congruent
 *     I (inner):      A is contained by B, but A and B are not congruent
 *     B (beginning):  A overlaps with the beginning of B but does not contain B
 *     E (ending):     A overlaps with the end of B but does not contain B */
char
ExtentMap::category(const Extent &a, const Extent &b)
{
    if (a.relaxed_first()==b.relaxed_first() && a.size()==b.size())
        return 'C';
    if (a.relaxed_first()+a.size() <= b.relaxed_first())
        return 'L';
    if (a.relaxed_first() >= b.relaxed_first()+b.size())
        return 'R';
    if (a.relaxed_first() <= b.relaxed_first() && a.relaxed_first()+a.size() >= b.relaxed_first()+b.size())
        return 'O';
    if (a.relaxed_first() >= b.relaxed_first() && a.relaxed_first()+a.size() <= b.relaxed_first()+b.size())
        return 'I';
    if (a.relaxed_first() <= b.relaxed_first()) /*already know a.first+a.size > b.first*/
        return 'B';
    return 'E';
}

void
SgAsmGenericFile::shift_extend(SgAsmGenericSection *s, rose_addr_t sa, rose_addr_t sn, AddressSpace space, Elasticity elasticity)
{
    ROSE_ASSERT(s!=NULL);
    ROSE_ASSERT(s->get_file()==this);
    ROSE_ASSERT((space & (ADDRSP_FILE|ADDRSP_MEMORY)) != 0);

    const bool debug = false;
    static size_t ncalls=0;
    char p[256];

    if (debug) {
        const char *space_s="unknown";
        if (space & ADDRSP_FILE) {
            space_s = "file";
        } else if (space & ADDRSP_MEMORY) {
            space_s = "memory";
        }
        sprintf(p, "SgAsmGenericFile::shift_extend[%" PRIuPTR "]: ", ncalls++);
        fprintf(stderr, "%s    -- START --\n", p);
        fprintf(stderr, "%s    S = [%d] \"%s\"\n", p, s->get_id(), s->get_name()->get_string(true).c_str());
        fprintf(stderr, "%s    %s Sa=0x%08" PRIx64 " (%" PRIu64 "), Sn=0x%08" PRIx64 " (%" PRIu64 ")\n",
                p, space_s, sa, sa, sn, sn);
        fprintf(stderr, "%s    elasticity = %s\n", p, (ELASTIC_NONE==elasticity ? "none" :
                                                       ELASTIC_UNREF==elasticity ? "unref" :
                                                       ELASTIC_HOLE==elasticity ? "unref+holes" :
                                                       "unknown"));
    }

    /* No-op case */
    if (0==sa && 0==sn) {
        if (debug) {
            fprintf(stderr, "%s    No change necessary.\n", p);
            fprintf(stderr, "%s    -- END --\n", p);
        }
        return;
    }

    bool filespace = (space & ADDRSP_FILE)!=0;
    bool memspace = (space & ADDRSP_MEMORY)!=0;
    rose_addr_t align=1, aligned_sa, aligned_sasn;
    SgAsmGenericSectionPtrList neighbors, villagers;
    ExtentMap amap; /* address mappings for all extents */
    Extent sp;

    /* Get a list of all sections that may need to be adjusted. */
    SgAsmGenericSectionPtrList all;
    switch (elasticity) {
      case ELASTIC_NONE:
      case ELASTIC_UNREF:
        all = filespace ? get_sections() : get_mapped_sections();
        break;
      case ELASTIC_HOLE:
        all = filespace ? get_sections(false) : get_mapped_sections();
        break;
    }
    if (debug) {
        fprintf(stderr, "%s    Following sections are in 'all' set:\n", p);
        for (size_t i=0; i<all.size(); i++) {
            Extent ep;
            if (filespace) {
                ep = all[i]->get_file_extent();
            } else {
                ROSE_ASSERT(all[i]->is_mapped());
                ep = all[i]->get_mapped_preferred_extent();
            }
            fprintf(stderr, "%s        0x%08" PRIx64 " 0x%08" PRIx64 " 0x%08" PRIx64 " [%d] \"%s\"\n",
                    p, ep.relaxed_first(), ep.size(), ep.relaxed_first()+ep.size(), all[i]->get_id(),
                    all[i]->get_name()->get_string(true).c_str());
        }
    }

    for (size_t pass=0; pass<2; pass++) {
        if (debug) {
            fprintf(stderr, "%s    -- %s --\n",
                    p, 0==pass?"FIRST PASS":"SECOND PASS (after making a larger hole)");
        }

        /* S offset and size in file or memory address space */
        if (filespace) {
            sp = s->get_file_extent();
        } else if (!memspace || !s->is_mapped()) {
            return; /*nothing to do*/
        } else {
            sp = s->get_mapped_preferred_extent();
        }

        /* Build address map */
        for (size_t i=0; i<all.size(); i++) {
            if (filespace) {
                amap.insert(all[i]->get_file_extent());
            } else {
                ROSE_ASSERT(all[i]->is_mapped());
                amap.insert(all[i]->get_mapped_preferred_extent());
            }
        }
        if (debug) {
            fprintf(stderr, "%s    Address map:\n", p);
            amap.dump_extents(stderr, (std::string(p)+"        ").c_str(), "amap");
            fprintf(stderr, "%s    Extent of S:\n", p);
//.........这里部分代码省略.........

void printIndex(off64_t offset, Extent &extent) {
    cout << offset << "\t" << extent.getTypePtr()->getName() << "\t" << extent.size() << "\n";
}