// archive.cc -- archive support for gold
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
#include "gold.h"
#include <cerrno>
#include <cstring>
#include <climits>
#include <vector>
+#include "libiberty.h"
+#include "filenames.h"
#include "elfcpp.h"
+#include "options.h"
+#include "mapfile.h"
#include "fileread.h"
+#include "readsyms.h"
#include "symtab.h"
#include "object.h"
#include "archive.h"
+#include "plugin.h"
namespace gold
{
char ar_fmag[2];
};
+// Class Archive static variables.
+unsigned int Archive::total_archives;
+unsigned int Archive::total_members;
+unsigned int Archive::total_members_loaded;
+
// Archive methods.
const char Archive::armag[sarmag] =
'!', '<', 'a', 'r', 'c', 'h', '>', '\n'
};
-const char Archive::arfmag[2] = { '`', '\n' };
+const char Archive::armagt[sarmag] =
+{
+ '!', '<', 't', 'h', 'i', 'n', '>', '\n'
+};
-// Get a view into the underlying file.
+const char Archive::arfmag[2] = { '`', '\n' };
-const unsigned char*
-Archive::get_view(off_t start, off_t size)
+Archive::Archive(const std::string& name, Input_file* input_file,
+ bool is_thin_archive, Dirsearch* dirpath, Task* task)
+ : name_(name), input_file_(input_file), armap_(), armap_names_(),
+ extended_names_(), armap_checked_(), seen_offsets_(), members_(),
+ is_thin_archive_(is_thin_archive), included_member_(false),
+ nested_archives_(), dirpath_(dirpath), task_(task), num_members_(0)
{
- return this->input_file_->file().get_view(start, size);
+ this->no_export_ =
+ parameters->options().check_excluded_libs(input_file->found_name());
}
// Set up the archive: read the symbol map and the extended name
void
Archive::setup()
{
+ // We need to ignore empty archives.
+ if (this->input_file_->file().filesize() == sarmag)
+ return;
+
// The first member of the archive should be the symbol table.
std::string armap_name;
- off_t armap_size = this->read_header(sarmag, &armap_name);
- if (!armap_name.empty())
+ section_size_type armap_size =
+ convert_to_section_size_type(this->read_header(sarmag, false,
+ &armap_name, NULL));
+ off_t off = sarmag;
+ if (armap_name.empty())
+ {
+ this->read_armap(sarmag + sizeof(Archive_header), armap_size);
+ off = sarmag + sizeof(Archive_header) + armap_size;
+ }
+ else if (!this->input_file_->options().whole_archive())
+ gold_error(_("%s: no archive symbol table (run ranlib)"),
+ this->name().c_str());
+
+ // See if there is an extended name table. We cache these views
+ // because it is likely that we will want to read the following
+ // header in the add_symbols routine.
+ if ((off & 1) != 0)
+ ++off;
+ std::string xname;
+ section_size_type extended_size =
+ convert_to_section_size_type(this->read_header(off, true, &xname, NULL));
+ if (xname == "/")
{
- fprintf(stderr, _("%s: %s: no archive symbol table (run ranlib)\n"),
- program_name, this->name().c_str());
- gold_exit(false);
+ const unsigned char* p = this->get_view(off + sizeof(Archive_header),
+ extended_size, false, true);
+ const char* px = reinterpret_cast<const char*>(p);
+ this->extended_names_.assign(px, extended_size);
}
+ bool preread_syms = (parameters->options().threads()
+ && parameters->options().preread_archive_symbols());
+#ifndef ENABLE_THREADS
+ preread_syms = false;
+#else
+ if (parameters->options().has_plugins())
+ preread_syms = false;
+#endif
+ if (preread_syms)
+ this->read_all_symbols();
+}
+
+// Unlock any nested archives.
+
+void
+Archive::unlock_nested_archives()
+{
+ for (Nested_archive_table::iterator p = this->nested_archives_.begin();
+ p != this->nested_archives_.end();
+ ++p)
+ {
+ p->second->unlock(this->task_);
+ }
+}
+
+// Read the archive symbol map.
+
+void
+Archive::read_armap(off_t start, section_size_type size)
+{
+ // To count the total number of archive members, we'll just count
+ // the number of times the file offset changes. Since most archives
+ // group the symbols in the armap by object, this ought to give us
+ // an accurate count.
+ off_t last_seen_offset = -1;
// Read in the entire armap.
- const unsigned char* p = this->get_view(sarmag + sizeof(Archive_header),
- armap_size);
+ const unsigned char* p = this->get_view(start, size, true, false);
// Numbers in the armap are always big-endian.
const elfcpp::Elf_Word* pword = reinterpret_cast<const elfcpp::Elf_Word*>(p);
- unsigned int nsyms = elfcpp::read_elf_word<true>(pword);
+ unsigned int nsyms = elfcpp::Swap<32, true>::readval(pword);
++pword;
// Note that the addition is in units of sizeof(elfcpp::Elf_Word).
const char* pnames = reinterpret_cast<const char*>(pword + nsyms);
+ section_size_type names_size =
+ reinterpret_cast<const char*>(p) + size - pnames;
+ this->armap_names_.assign(pnames, names_size);
this->armap_.resize(nsyms);
+ section_offset_type name_offset = 0;
for (unsigned int i = 0; i < nsyms; ++i)
{
- this->armap_[i].name = pnames;
- this->armap_[i].offset = elfcpp::read_elf_word<true>(pword);
- pnames += strlen(pnames) + 1;
+ this->armap_[i].name_offset = name_offset;
+ this->armap_[i].file_offset = elfcpp::Swap<32, true>::readval(pword);
+ name_offset += strlen(pnames + name_offset) + 1;
++pword;
+ if (this->armap_[i].file_offset != last_seen_offset)
+ {
+ last_seen_offset = this->armap_[i].file_offset;
+ ++this->num_members_;
+ }
}
- if (reinterpret_cast<const unsigned char*>(pnames) - p > armap_size)
- {
- fprintf(stderr, _("%s: %s: bad archive symbol table names\n"),
- program_name, this->name().c_str());
- gold_exit(false);
- }
+ if (static_cast<section_size_type>(name_offset) > names_size)
+ gold_error(_("%s: bad archive symbol table names"),
+ this->name().c_str());
- // See if there is an extended name table.
- off_t off = sarmag + sizeof(Archive_header) + armap_size;
- if ((off & 1) != 0)
- ++off;
- std::string xname;
- off_t extended_size = this->read_header(off, &xname);
- if (xname == "/")
- {
- p = this->get_view(off + sizeof(Archive_header), extended_size);
- const char* px = reinterpret_cast<const char*>(p);
- this->extended_names_.assign(px, extended_size);
- }
-
- // Opening the file locked it. Unlock it now.
- this->input_file_->file().unlock();
+ // This array keeps track of which symbols are for archive elements
+ // which we have already included in the link.
+ this->armap_checked_.resize(nsyms);
}
// Read the header of an archive member at OFF. Fail if something
// of the member.
off_t
-Archive::read_header(off_t off, std::string* pname)
+Archive::read_header(off_t off, bool cache, std::string* pname,
+ off_t* nested_off)
{
- const unsigned char* p = this->get_view(off, sizeof(Archive_header));
+ const unsigned char* p = this->get_view(off, sizeof(Archive_header), true,
+ cache);
const Archive_header* hdr = reinterpret_cast<const Archive_header*>(p);
+ return this->interpret_header(hdr, off, pname, nested_off);
+}
+
+// Interpret the header of HDR, the header of the archive member at
+// file offset OFF. Fail if something goes wrong. Return the size of
+// the member. Set *PNAME to the name of the member.
+off_t
+Archive::interpret_header(const Archive_header* hdr, off_t off,
+ std::string* pname, off_t* nested_off) const
+{
if (memcmp(hdr->ar_fmag, arfmag, sizeof arfmag) != 0)
{
- fprintf(stderr, _("%s; %s: malformed archive header at %ld\n"),
- program_name, this->name().c_str(),
- static_cast<long>(off));
- gold_exit(false);
+ gold_error(_("%s: malformed archive header at %zu"),
+ this->name().c_str(), static_cast<size_t>(off));
+ return this->input_file_->file().filesize() - off;
}
const int size_string_size = sizeof hdr->ar_size;
|| member_size < 0
|| (member_size == LONG_MAX && errno == ERANGE))
{
- fprintf(stderr, _("%s: %s: malformed archive header size at %ld\n"),
- program_name, this->name().c_str(),
- static_cast<long>(off));
- gold_exit(false);
+ gold_error(_("%s: malformed archive header size at %zu"),
+ this->name().c_str(), static_cast<size_t>(off));
+ return this->input_file_->file().filesize() - off;
}
if (hdr->ar_name[0] != '/')
if (name_end == NULL
|| name_end - hdr->ar_name >= static_cast<int>(sizeof hdr->ar_name))
{
- fprintf(stderr, _("%s: %s: malformed archive header name at %ld\n"),
- program_name, this->name().c_str(),
- static_cast<long>(off));
- gold_exit(false);
+ gold_error(_("%s: malformed archive header name at %zu"),
+ this->name().c_str(), static_cast<size_t>(off));
+ return this->input_file_->file().filesize() - off;
}
pname->assign(hdr->ar_name, name_end - hdr->ar_name);
+ if (nested_off != NULL)
+ *nested_off = 0;
}
else if (hdr->ar_name[1] == ' ')
{
{
errno = 0;
long x = strtol(hdr->ar_name + 1, &end, 10);
+ long y = 0;
+ if (*end == ':')
+ y = strtol(end + 1, &end, 10);
if (*end != ' '
|| x < 0
|| (x == LONG_MAX && errno == ERANGE)
|| static_cast<size_t>(x) >= this->extended_names_.size())
{
- fprintf(stderr, _("%s: %s: bad extended name index at %ld\n"),
- program_name, this->name().c_str(),
- static_cast<long>(off));
- gold_exit(false);
+ gold_error(_("%s: bad extended name index at %zu"),
+ this->name().c_str(), static_cast<size_t>(off));
+ return this->input_file_->file().filesize() - off;
}
const char* name = this->extended_names_.data() + x;
- const char* name_end = strchr(name, '/');
+ const char* name_end = strchr(name, '\n');
if (static_cast<size_t>(name_end - name) > this->extended_names_.size()
- || name_end[1] != '\n')
+ || name_end[-1] != '/')
{
- fprintf(stderr, _("%s: %s: bad extended name entry at header %ld\n"),
- program_name, this->name().c_str(),
- static_cast<long>(off));
- gold_exit(false);
+ gold_error(_("%s: bad extended name entry at header %zu"),
+ this->name().c_str(), static_cast<size_t>(off));
+ return this->input_file_->file().filesize() - off;
}
- pname->assign(name, name_end - name);
+ pname->assign(name, name_end - 1 - name);
+ if (nested_off != NULL)
+ *nested_off = y;
}
return member_size;
}
+// An archive member iterator.
+
+class Archive::const_iterator
+{
+ public:
+ // The header of an archive member. This is what this iterator
+ // points to.
+ struct Header
+ {
+ // The name of the member.
+ std::string name;
+ // The file offset of the member.
+ off_t off;
+ // The file offset of a nested archive member.
+ off_t nested_off;
+ // The size of the member.
+ off_t size;
+ };
+
+ const_iterator(Archive* archive, off_t off)
+ : archive_(archive), off_(off)
+ { this->read_next_header(); }
+
+ const Header&
+ operator*() const
+ { return this->header_; }
+
+ const Header*
+ operator->() const
+ { return &this->header_; }
+
+ const_iterator&
+ operator++()
+ {
+ if (this->off_ == this->archive_->file().filesize())
+ return *this;
+ this->off_ += sizeof(Archive_header);
+ if (!this->archive_->is_thin_archive())
+ this->off_ += this->header_.size;
+ if ((this->off_ & 1) != 0)
+ ++this->off_;
+ this->read_next_header();
+ return *this;
+ }
+
+ const_iterator
+ operator++(int)
+ {
+ const_iterator ret = *this;
+ ++*this;
+ return ret;
+ }
+
+ bool
+ operator==(const const_iterator p) const
+ { return this->off_ == p->off; }
+
+ bool
+ operator!=(const const_iterator p) const
+ { return this->off_ != p->off; }
+
+ private:
+ void
+ read_next_header();
+
+ // The underlying archive.
+ Archive* archive_;
+ // The current offset in the file.
+ off_t off_;
+ // The current archive header.
+ Header header_;
+};
+
+// Read the next archive header.
+
+void
+Archive::const_iterator::read_next_header()
+{
+ off_t filesize = this->archive_->file().filesize();
+ while (true)
+ {
+ if (filesize - this->off_ < static_cast<off_t>(sizeof(Archive_header)))
+ {
+ if (filesize != this->off_)
+ {
+ gold_error(_("%s: short archive header at %zu"),
+ this->archive_->filename().c_str(),
+ static_cast<size_t>(this->off_));
+ this->off_ = filesize;
+ }
+ this->header_.off = filesize;
+ return;
+ }
+
+ unsigned char buf[sizeof(Archive_header)];
+ this->archive_->file().read(this->off_, sizeof(Archive_header), buf);
+
+ const Archive_header* hdr = reinterpret_cast<const Archive_header*>(buf);
+ this->header_.size =
+ this->archive_->interpret_header(hdr, this->off_, &this->header_.name,
+ &this->header_.nested_off);
+ this->header_.off = this->off_;
+
+ // Skip special members.
+ if (!this->header_.name.empty() && this->header_.name != "/")
+ return;
+
+ this->off_ += sizeof(Archive_header) + this->header_.size;
+ if ((this->off_ & 1) != 0)
+ ++this->off_;
+ }
+}
+
+// Initial iterator.
+
+Archive::const_iterator
+Archive::begin()
+{
+ return Archive::const_iterator(this, sarmag);
+}
+
+// Final iterator.
+
+Archive::const_iterator
+Archive::end()
+{
+ return Archive::const_iterator(this, this->input_file_->file().filesize());
+}
+
+// Get the file and offset for an archive member, which may be an
+// external member of a thin archive. Set *INPUT_FILE to the
+// file containing the actual member, *MEMOFF to the offset
+// within that file (0 if not a nested archive), and *MEMBER_NAME
+// to the name of the archive member. Return TRUE on success.
+
+bool
+Archive::get_file_and_offset(off_t off, Input_file** input_file, off_t* memoff,
+ off_t* memsize, std::string* member_name)
+{
+ off_t nested_off;
+
+ *memsize = this->read_header(off, false, member_name, &nested_off);
+
+ *input_file = this->input_file_;
+ *memoff = off + static_cast<off_t>(sizeof(Archive_header));
+
+ if (!this->is_thin_archive_)
+ return true;
+
+ // Adjust a relative pathname so that it is relative
+ // to the directory containing the archive.
+ if (!IS_ABSOLUTE_PATH(member_name->c_str()))
+ {
+ const char* arch_path = this->filename().c_str();
+ const char* basename = lbasename(arch_path);
+ if (basename > arch_path)
+ member_name->replace(0, 0,
+ this->filename().substr(0, basename - arch_path));
+ }
+
+ if (nested_off > 0)
+ {
+ // This is a member of a nested archive. Open the containing
+ // archive if we don't already have it open, then do a recursive
+ // call to include the member from that archive.
+ Archive* arch;
+ Nested_archive_table::const_iterator p =
+ this->nested_archives_.find(*member_name);
+ if (p != this->nested_archives_.end())
+ arch = p->second;
+ else
+ {
+ Input_file_argument* input_file_arg =
+ new Input_file_argument(member_name->c_str(),
+ Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", false, parameters->options());
+ *input_file = new Input_file(input_file_arg);
+ int dummy = 0;
+ if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
+ return false;
+ arch = new Archive(*member_name, *input_file, false, this->dirpath_,
+ this->task_);
+ arch->setup();
+ std::pair<Nested_archive_table::iterator, bool> ins =
+ this->nested_archives_.insert(std::make_pair(*member_name, arch));
+ gold_assert(ins.second);
+ }
+ return arch->get_file_and_offset(nested_off, input_file, memoff,
+ memsize, member_name);
+ }
+
+ // This is an external member of a thin archive. Open the
+ // file as a regular relocatable object file.
+ Input_file_argument* input_file_arg =
+ new Input_file_argument(member_name->c_str(),
+ Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", false, this->input_file_->options());
+ *input_file = new Input_file(input_file_arg);
+ int dummy = 0;
+ if (!(*input_file)->open(*this->dirpath_, this->task_, &dummy))
+ return false;
+
+ *memoff = 0;
+ *memsize = (*input_file)->file().filesize();
+ return true;
+}
+
+// Return an ELF object for the member at offset OFF. If the ELF
+// object has an unsupported target type, set *PUNCONFIGURED to true
+// and return NULL.
+
+Object*
+Archive::get_elf_object_for_member(off_t off, bool* punconfigured)
+{
+ *punconfigured = false;
+
+ Input_file* input_file;
+ off_t memoff;
+ off_t memsize;
+ std::string member_name;
+ if (!this->get_file_and_offset(off, &input_file, &memoff, &memsize,
+ &member_name))
+ return NULL;
+
+ if (parameters->options().has_plugins())
+ {
+ Object* obj = parameters->options().plugins()->claim_file(input_file,
+ memoff,
+ memsize);
+ if (obj != NULL)
+ {
+ // The input file was claimed by a plugin, and its symbols
+ // have been provided by the plugin.
+ return obj;
+ }
+ }
+
+ const unsigned char* ehdr;
+ int read_size;
+ if (!is_elf_object(input_file, memoff, &ehdr, &read_size))
+ {
+ gold_error(_("%s: member at %zu is not an ELF object"),
+ this->name().c_str(), static_cast<size_t>(off));
+ return NULL;
+ }
+
+ Object *obj = make_elf_object((std::string(this->input_file_->filename())
+ + "(" + member_name + ")"),
+ input_file, memoff, ehdr, read_size,
+ punconfigured);
+ if (obj == NULL)
+ return NULL;
+ obj->set_no_export(this->no_export());
+ return obj;
+}
+
+// Read the symbols from all the archive members in the link.
+
+void
+Archive::read_all_symbols()
+{
+ for (Archive::const_iterator p = this->begin();
+ p != this->end();
+ ++p)
+ this->read_symbols(p->off);
+}
+
+// Read the symbols from an archive member in the link. OFF is the file
+// offset of the member header.
+
+void
+Archive::read_symbols(off_t off)
+{
+ bool dummy;
+ Object* obj = this->get_elf_object_for_member(off, &dummy);
+
+ if (obj == NULL)
+ return;
+
+ Read_symbols_data* sd = new Read_symbols_data;
+ obj->read_symbols(sd);
+ Archive_member member(obj, sd);
+ this->members_[off] = member;
+}
+
// Select members from the archive and add them to the link. We walk
// through the elements in the archive map, and look each one up in
// the symbol table. If it exists as a strong undefined symbol, we
// pull in the corresponding element. We have to do this in a loop,
// since pulling in one element may create new undefined symbols which
-// may be satisfied by other objects in the archive.
+// may be satisfied by other objects in the archive. Return true in
+// the normal case, false if the first member we tried to add from
+// this archive had an incompatible target.
-void
+bool
Archive::add_symbols(Symbol_table* symtab, Layout* layout,
- Input_objects* input_objects)
+ Input_objects* input_objects, Mapfile* mapfile)
{
- size_t armap_size = this->armap_.size();
- std::vector<bool> seen;
- seen.resize(this->armap_.size());
- seen.clear();
+ ++Archive::total_archives;
+
+ if (this->input_file_->options().whole_archive())
+ return this->include_all_members(symtab, layout, input_objects,
+ mapfile);
+
+ Archive::total_members += this->num_members_;
+ input_objects->archive_start(this);
+
+ const size_t armap_size = this->armap_.size();
+
+ // This is a quick optimization, since we usually see many symbols
+ // in a row with the same offset. last_seen_offset holds the last
+ // offset we saw that was present in the seen_offsets_ set.
+ off_t last_seen_offset = -1;
+
+ // Track which symbols in the symbol table we've already found to be
+ // defined.
+
+ char* tmpbuf = NULL;
+ size_t tmpbuflen = 0;
bool added_new_object;
do
{
added_new_object = false;
- off_t last = -1;
for (size_t i = 0; i < armap_size; ++i)
{
- if (seen[i])
- continue;
- if (this->armap_[i].offset == last)
+ if (this->armap_checked_[i])
+ continue;
+ if (this->armap_[i].file_offset == last_seen_offset)
+ {
+ this->armap_checked_[i] = true;
+ continue;
+ }
+ if (this->seen_offsets_.find(this->armap_[i].file_offset)
+ != this->seen_offsets_.end())
{
- seen[i] = true;
+ this->armap_checked_[i] = true;
+ last_seen_offset = this->armap_[i].file_offset;
continue;
}
- Symbol* sym = symtab->lookup(this->armap_[i].name);
+ const char* sym_name = (this->armap_names_.data()
+ + this->armap_[i].name_offset);
+
+ // In an object file, and therefore in an archive map, an
+ // '@' in the name separates the symbol name from the
+ // version name. If there are two '@' characters, this is
+ // the default version.
+ const char* ver = strchr(sym_name, '@');
+ bool def = false;
+ if (ver != NULL)
+ {
+ size_t symlen = ver - sym_name;
+ if (symlen + 1 > tmpbuflen)
+ {
+ tmpbuf = static_cast<char*>(realloc(tmpbuf, symlen + 1));
+ tmpbuflen = symlen + 1;
+ }
+ memcpy(tmpbuf, sym_name, symlen);
+ tmpbuf[symlen] = '\0';
+ sym_name = tmpbuf;
+
+ ++ver;
+ if (*ver == '@')
+ {
+ ++ver;
+ def = true;
+ }
+ }
+
+ Symbol* sym = symtab->lookup(sym_name, ver);
+ if (def
+ && ver != NULL
+ && (sym == NULL
+ || !sym->is_undefined()
+ || sym->binding() == elfcpp::STB_WEAK))
+ sym = symtab->lookup(sym_name, NULL);
+
if (sym == NULL)
- continue;
- else if (sym->shnum() != elfcpp::SHN_UNDEF)
{
- seen[i] = true;
+ // Check whether the symbol was named in a -u option.
+ if (!parameters->options().is_undefined(sym_name))
+ continue;
+ }
+ else if (!sym->is_undefined())
+ {
+ this->armap_checked_[i] = true;
continue;
}
else if (sym->binding() == elfcpp::STB_WEAK)
continue;
// We want to include this object in the link.
- last = this->armap_[i].offset;
- this->include_member(symtab, layout, input_objects, last);
+ last_seen_offset = this->armap_[i].file_offset;
+ this->seen_offsets_.insert(last_seen_offset);
+ this->armap_checked_[i] = true;
+
+ std::string why;
+ if (sym == NULL)
+ {
+ why = "-u ";
+ why += sym_name;
+ }
+ if (!this->include_member(symtab, layout, input_objects,
+ last_seen_offset, mapfile, sym,
+ why.c_str()))
+ {
+ if (tmpbuf != NULL)
+ free(tmpbuf);
+ return false;
+ }
+
added_new_object = true;
}
}
while (added_new_object);
+
+ if (tmpbuf != NULL)
+ free(tmpbuf);
+
+ input_objects->archive_stop(this);
+
+ return true;
+}
+
+// Include all the archive members in the link. This is for --whole-archive.
+
+bool
+Archive::include_all_members(Symbol_table* symtab, Layout* layout,
+ Input_objects* input_objects, Mapfile* mapfile)
+{
+ input_objects->archive_start(this);
+
+ if (this->members_.size() > 0)
+ {
+ std::map<off_t, Archive_member>::const_iterator p;
+ for (p = this->members_.begin();
+ p != this->members_.end();
+ ++p)
+ {
+ if (!this->include_member(symtab, layout, input_objects, p->first,
+ mapfile, NULL, "--whole-archive"))
+ return false;
+ ++Archive::total_members;
+ }
+ }
+ else
+ {
+ for (Archive::const_iterator p = this->begin();
+ p != this->end();
+ ++p)
+ {
+ if (!this->include_member(symtab, layout, input_objects, p->off,
+ mapfile, NULL, "--whole-archive"))
+ return false;
+ ++Archive::total_members;
+ }
+ }
+
+ input_objects->archive_stop(this);
+
+ return true;
+}
+
+// Return the number of members in the archive. This is only used for
+// reports.
+
+size_t
+Archive::count_members()
+{
+ size_t ret = 0;
+ for (Archive::const_iterator p = this->begin();
+ p != this->end();
+ ++p)
+ ++ret;
+ return ret;
}
// Include an archive member in the link. OFF is the file offset of
-// the member header.
+// the member header. WHY is the reason we are including this member.
+// Return true if we added the member or if we had an error, return
+// false if this was the first member we tried to add from this
+// archive and it had an incompatible format.
-void
+bool
Archive::include_member(Symbol_table* symtab, Layout* layout,
- Input_objects* input_objects, off_t off)
+ Input_objects* input_objects, off_t off,
+ Mapfile* mapfile, Symbol* sym, const char* why)
{
- std::string n;
- this->read_header(off, &n);
-
- size_t memoff = off + sizeof(Archive_header);
-
- // Read enough of the file to pick up the entire ELF header.
- int ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size;
- off_t bytes;
- const unsigned char* p = this->input_file_->file().get_view(memoff,
- ehdr_size,
- &bytes);
- if (bytes < 4)
+ ++Archive::total_members_loaded;
+
+ std::map<off_t, Archive_member>::const_iterator p = this->members_.find(off);
+ if (p != this->members_.end())
{
- fprintf(stderr, _("%s: %s: member at %ld is not an ELF object"),
- program_name, this->name().c_str(),
- static_cast<long>(off));
- gold_exit(false);
+ Object *obj = p->second.obj_;
+
+ Read_symbols_data *sd = p->second.sd_;
+ if (mapfile != NULL)
+ mapfile->report_include_archive_member(obj->name(), sym, why);
+ if (input_objects->add_object(obj))
+ {
+ obj->layout(symtab, layout, sd);
+ obj->add_symbols(symtab, sd, layout);
+ this->included_member_ = true;
+ }
+ delete sd;
+ return true;
}
- static unsigned char elfmagic[4] =
+ bool unconfigured;
+ Object* obj = this->get_elf_object_for_member(off, &unconfigured);
+
+ if (!this->included_member_
+ && this->searched_for()
+ && obj == NULL
+ && unconfigured)
{
- elfcpp::ELFMAG0, elfcpp::ELFMAG1,
- elfcpp::ELFMAG2, elfcpp::ELFMAG3
- };
- if (memcmp(p, elfmagic, 4) != 0)
+ if (obj != NULL)
+ delete obj;
+ return false;
+ }
+
+ if (obj == NULL)
+ return true;
+
+ if (mapfile != NULL)
+ mapfile->report_include_archive_member(obj->name(), sym, why);
+
+ Pluginobj* pluginobj = obj->pluginobj();
+ if (pluginobj != NULL)
{
- fprintf(stderr, _("%s: %s: member at %ld is not an ELF object"),
- program_name, this->name().c_str(),
- static_cast<long>(off));
- gold_exit(false);
+ pluginobj->add_symbols(symtab, NULL, layout);
+ this->included_member_ = true;
+ return true;
}
- Object* obj = make_elf_object((std::string(this->input_file_->filename())
- + "(" + n + ")"),
- this->input_file_, memoff, p, bytes);
+ if (!input_objects->add_object(obj))
+ delete obj;
+ else
+ {
+ Read_symbols_data sd;
+ obj->read_symbols(&sd);
+ obj->layout(symtab, layout, &sd);
+ obj->add_symbols(symtab, &sd, layout);
+
+ // If this is an external member of a thin archive, unlock the file
+ // for the next task.
+ if (obj->offset() == 0)
+ obj->unlock(this->task_);
+
+ this->included_member_ = true;
+ }
+
+ return true;
+}
- input_objects->add_object(obj);
+// Print statistical information to stderr. This is used for --stats.
- Read_symbols_data sd;
- obj->read_symbols(&sd);
- obj->layout(layout, &sd);
- obj->add_symbols(symtab, &sd);
+void
+Archive::print_stats()
+{
+ fprintf(stderr, _("%s: archive libraries: %u\n"),
+ program_name, Archive::total_archives);
+ fprintf(stderr, _("%s: total archive members: %u\n"),
+ program_name, Archive::total_members);
+ fprintf(stderr, _("%s: loaded archive members: %u\n"),
+ program_name, Archive::total_members_loaded);
}
// Add_archive_symbols methods.
// Return whether we can add the archive symbols. We are blocked by
// this_blocker_. We block next_blocker_. We also lock the file.
-Task::Is_runnable_type
-Add_archive_symbols::is_runnable(Workqueue*)
+Task_token*
+Add_archive_symbols::is_runnable()
{
if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
- return IS_BLOCKED;
- return IS_RUNNABLE;
+ return this->this_blocker_;
+ return NULL;
}
-class Add_archive_symbols::Add_archive_symbols_locker : public Task_locker
-{
- public:
- Add_archive_symbols_locker(Task_token& token, Workqueue* workqueue,
- Archive* archive)
- : blocker_(token, workqueue), archlock_(*archive)
- { }
-
- private:
- Task_locker_block blocker_;
- Task_locker_obj<Archive> archlock_;
-};
-
-Task_locker*
-Add_archive_symbols::locks(Workqueue* workqueue)
+void
+Add_archive_symbols::locks(Task_locker* tl)
{
- return new Add_archive_symbols_locker(*this->next_blocker_,
- workqueue,
- this->archive_);
+ tl->add(this, this->next_blocker_);
+ tl->add(this, this->archive_->token());
}
void
-Add_archive_symbols::run(Workqueue*)
+Add_archive_symbols::run(Workqueue* workqueue)
{
- this->archive_->add_symbols(this->symtab_, this->layout_,
- this->input_objects_);
+ bool added = this->archive_->add_symbols(this->symtab_, this->layout_,
+ this->input_objects_,
+ this->mapfile_);
+ this->archive_->unlock_nested_archives();
+
+ this->archive_->release();
+ this->archive_->clear_uncached_views();
+
+ if (!added)
+ {
+ // This archive holds object files which are incompatible with
+ // our output file.
+ Read_symbols::incompatible_warning(this->input_argument_,
+ this->archive_->input_file());
+ Read_symbols::requeue(workqueue, this->input_objects_, this->symtab_,
+ this->layout_, this->dirpath_, this->dirindex_,
+ this->mapfile_, this->input_argument_,
+ this->input_group_, this->next_blocker_);
+ delete this->archive_;
+ return;
+ }
+
+ if (this->input_group_ != NULL)
+ this->input_group_->add_archive(this->archive_);
+ else
+ {
+ // We no longer need to know about this archive.
+ delete this->archive_;
+ this->archive_ = NULL;
+ }
}
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff