// archive.cc -- archive support for gold
-// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include "symtab.h"
#include "object.h"
#include "archive.h"
+#include "plugin.h"
namespace gold
{
const char Archive::arfmag[2] = { '`', '\n' };
+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)
+{
+ this->no_export_ =
+ parameters->options().check_excluded_libs(input_file->found_name());
+}
+
// Set up the archive: read the symbol map and the extended name
// table.
void
-Archive::setup(Input_objects* input_objects)
+Archive::setup()
{
// We need to ignore empty archives.
if (this->input_file_->file().filesize() == sarmag)
&& 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(input_objects);
+ this->read_all_symbols();
}
// Unlock any nested archives.
else if (hdr->ar_name[1] == ' ')
{
// This is the symbol table.
- pname->clear();
+ if (!pname->empty())
+ pname->clear();
}
else if (hdr->ar_name[1] == '/')
{
// to the name of the archive member. Return TRUE on success.
bool
-Archive::get_file_and_offset(off_t off, Input_objects* input_objects,
- Input_file** input_file, off_t* memoff,
- std::string* member_name)
+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;
- this->read_header(off, false, member_name, &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));
// to the directory containing the archive.
if (!IS_ABSOLUTE_PATH(member_name->c_str()))
{
- const char* arch_path = this->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->name().substr(0, basename - arch_path));
+ this->filename().substr(0, basename - arch_path));
}
if (nested_off > 0)
else
{
Input_file_argument* input_file_arg =
- new Input_file_argument(member_name->c_str(), false, "", false,
- parameters->options());
+ 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);
- if (!(*input_file)->open(parameters->options(), *this->dirpath_,
- this->task_))
+ 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(input_objects);
+ 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_objects,
- input_file, memoff, member_name);
+ 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(), false, "", false,
- this->input_file_->options());
+ 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);
- if (!(*input_file)->open(parameters->options(), *this->dirpath_,
- this->task_))
+ 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. Set *MEMBER_NAME to
-// the name of the member.
+// 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, Input_objects* input_objects)
+Archive::get_elf_object_for_member(off_t off, bool* punconfigured)
{
- std::string member_name;
+ *punconfigured = false;
+
Input_file* input_file;
off_t memoff;
-
- if (!this->get_file_and_offset(off, input_objects, &input_file, &memoff,
- &member_name))
+ off_t memsize;
+ std::string member_name;
+ if (!this->get_file_and_offset(off, &input_file, &memoff, &memsize,
+ &member_name))
return NULL;
- off_t filesize = input_file->file().filesize();
- int read_size = elfcpp::Elf_sizes<64>::ehdr_size;
- if (filesize - memoff < read_size)
- read_size = filesize - memoff;
-
- if (read_size < 4)
+ if (parameters->options().has_plugins())
{
- gold_error(_("%s: member at %zu is not an ELF object"),
- this->name().c_str(), static_cast<size_t>(off));
- return NULL;
+ 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 = input_file->file().get_view(memoff, 0, read_size,
- true, false);
-
- static unsigned char elfmagic[4] =
- {
- elfcpp::ELFMAG0, elfcpp::ELFMAG1,
- elfcpp::ELFMAG2, elfcpp::ELFMAG3
- };
- if (memcmp(ehdr, elfmagic, 4) != 0)
+ 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;
}
- return make_elf_object((std::string(this->input_file_->filename())
+ Object *obj = make_elf_object((std::string(this->input_file_->filename())
+ "(" + member_name + ")"),
- input_file, memoff, ehdr, read_size);
+ 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(Input_objects* input_objects)
+Archive::read_all_symbols()
{
for (Archive::const_iterator p = this->begin();
p != this->end();
++p)
- this->read_symbols(input_objects, p->off);
+ 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(Input_objects* input_objects, off_t off)
+Archive::read_symbols(off_t off)
{
- Object* obj = this->get_elf_object_for_member(off, input_objects);
+ bool dummy;
+ Object* obj = this->get_elf_object_for_member(off, &dummy);
if (obj == NULL)
return;
this->members_[off] = member;
}
+Archive::Should_include
+Archive::should_include_member(Symbol_table* symtab, const char* sym_name,
+ Symbol** symp, std::string* why, char** tmpbufp,
+ size_t* tmpbuflen)
+{
+ // 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.
+ char* tmpbuf = *tmpbufp;
+ 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*>(xrealloc(tmpbuf, symlen + 1));
+ *tmpbufp = tmpbuf;
+ *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);
+
+ *symp = sym;
+
+ if (sym == NULL)
+ {
+ // Check whether the symbol was named in a -u option.
+ if (!parameters->options().is_undefined(sym_name))
+ return Archive::SHOULD_INCLUDE_UNKNOWN;
+ else
+ {
+ *why = "-u ";
+ *why += sym_name;
+ }
+ }
+ else if (!sym->is_undefined())
+ return Archive::SHOULD_INCLUDE_NO;
+ else if (sym->binding() == elfcpp::STB_WEAK)
+ return Archive::SHOULD_INCLUDE_UNKNOWN;
+
+ return Archive::SHOULD_INCLUDE_YES;
+}
+
// 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, Mapfile* mapfile)
{
// 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
{
const char* sym_name = (this->armap_names_.data()
+ this->armap_[i].name_offset);
- Symbol* sym = symtab->lookup(sym_name);
- if (sym == NULL)
- {
- // 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)
+
+ Symbol* sym;
+ std::string why;
+ Archive::Should_include t =
+ Archive::should_include_member(symtab, sym_name, &sym, &why,
+ &tmpbuf, &tmpbuflen);
+
+ if (t == Archive::SHOULD_INCLUDE_NO
+ || t == Archive::SHOULD_INCLUDE_YES)
+ this->armap_checked_[i] = true;
+
+ if (t != Archive::SHOULD_INCLUDE_YES)
continue;
// We want to include this object in the link.
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)
+ if (!this->include_member(symtab, layout, input_objects,
+ last_seen_offset, mapfile, sym,
+ why.c_str()))
{
- why = "-u ";
- why += sym_name;
+ if (tmpbuf != NULL)
+ free(tmpbuf);
+ return false;
}
- this->include_member(symtab, layout, input_objects,
- last_seen_offset, mapfile, sym, why.c_str());
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.
-void
+bool
Archive::include_all_members(Symbol_table* symtab, Layout* layout,
Input_objects* input_objects, Mapfile* mapfile)
{
p != this->members_.end();
++p)
{
- this->include_member(symtab, layout, input_objects, p->first,
- mapfile, NULL, "--whole-archive");
+ if (!this->include_member(symtab, layout, input_objects, p->first,
+ mapfile, NULL, "--whole-archive"))
+ return false;
++Archive::total_members;
}
}
p != this->end();
++p)
{
- this->include_member(symtab, layout, input_objects, p->off,
- mapfile, NULL, "--whole-archive");
+ 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
// Include an archive member in the link. OFF is the file offset of
// 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,
Mapfile* mapfile, Symbol* sym, const char* why)
if (p != this->members_.end())
{
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);
+ obj->add_symbols(symtab, sd, layout);
+ this->included_member_ = true;
}
delete sd;
- return;
+ return true;
}
- Object* obj = this->get_elf_object_for_member(off, input_objects);
+ bool unconfigured;
+ Object* obj = this->get_elf_object_for_member(off, &unconfigured);
+
+ if (!this->included_member_
+ && this->searched_for()
+ && obj == NULL
+ && unconfigured)
+ return false;
+
if (obj == NULL)
- return;
+ return true;
if (mapfile != NULL)
mapfile->report_include_archive_member(obj->name(), sym, why);
- if (input_objects->add_object(obj))
+ Pluginobj* pluginobj = obj->pluginobj();
+ if (pluginobj != NULL)
{
- Read_symbols_data sd;
- obj->read_symbols(&sd);
- obj->layout(symtab, layout, &sd);
- obj->add_symbols(symtab, &sd);
+ pluginobj->add_symbols(symtab, NULL, layout);
+ this->included_member_ = true;
+ return true;
}
- else
+
+ if (!input_objects->add_object(obj))
{
- // FIXME: We need to close the descriptor here.
+ // If this is an external member of a thin archive, unlock the
+ // file.
+ if (obj->offset() == 0)
+ obj->unlock(this->task_);
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;
}
// Print statistical information to stderr. This is used for --stats.
}
void
-Add_archive_symbols::run(Workqueue*)
+Add_archive_symbols::run(Workqueue* workqueue)
{
- this->archive_->add_symbols(this->symtab_, this->layout_,
- this->input_objects_, this->mapfile_);
-
+ 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
}
}
+// Class Lib_group static variables.
+unsigned int Lib_group::total_lib_groups;
+unsigned int Lib_group::total_members;
+unsigned int Lib_group::total_members_loaded;
+
+Lib_group::Lib_group(const Input_file_lib* lib, Task* task)
+ : lib_(lib), task_(task), members_()
+{
+ this->members_.resize(lib->size());
+}
+
+// Select members from the lib group and add them to the link. We walk
+// through the the members, and check if each one up should be included.
+// If the object says it should be included, we do so. We have to do
+// this in a loop, since including one member may create new undefined
+// symbols which may be satisfied by other members.
+
+void
+Lib_group::add_symbols(Symbol_table* symtab, Layout* layout,
+ Input_objects* input_objects)
+{
+ ++Lib_group::total_lib_groups;
+
+ Lib_group::total_members += this->members_.size();
+
+ bool added_new_object;
+ do
+ {
+ added_new_object = false;
+ unsigned int i = 0;
+ while (i < this->members_.size())
+ {
+ const Archive_member& member = this->members_[i];
+ Object *obj = member.obj_;
+ std::string why;
+
+ // Skip files with no symbols. Plugin objects have
+ // member.sd_ == NULL.
+ if (obj != NULL
+ && (member.sd_ == NULL || member.sd_->symbol_names != NULL))
+ {
+ Archive::Should_include t = obj->should_include_member(symtab,
+ member.sd_,
+ &why);
+
+ if (t != Archive::SHOULD_INCLUDE_YES)
+ {
+ ++i;
+ continue;
+ }
+
+ this->include_member(symtab, layout, input_objects, member);
+
+ added_new_object = true;
+ }
+ else
+ {
+ if (member.sd_ != NULL)
+ delete member.sd_;
+ }
+
+ this->members_[i] = this->members_.back();
+ this->members_.pop_back();
+ }
+ }
+ while (added_new_object);
+}
+
+// Include a lib group member in the link.
+
+void
+Lib_group::include_member(Symbol_table* symtab, Layout* layout,
+ Input_objects* input_objects,
+ const Archive_member& member)
+{
+ ++Lib_group::total_members_loaded;
+
+ Object* obj = member.obj_;
+ gold_assert(obj != NULL);
+
+ Pluginobj* pluginobj = obj->pluginobj();
+ if (pluginobj != NULL)
+ {
+ pluginobj->add_symbols(symtab, NULL, layout);
+ return;
+ }
+
+ Read_symbols_data* sd = member.sd_;
+ gold_assert(sd != NULL);
+ obj->lock(this->task_);
+ if (input_objects->add_object(obj))
+ {
+ obj->layout(symtab, layout, sd);
+ obj->add_symbols(symtab, sd, layout);
+ // Unlock the file for the next task.
+ obj->unlock(this->task_);
+ }
+ delete sd;
+}
+
+// Print statistical information to stderr. This is used for --stats.
+
+void
+Lib_group::print_stats()
+{
+ fprintf(stderr, _("%s: lib groups: %u\n"),
+ program_name, Lib_group::total_lib_groups);
+ fprintf(stderr, _("%s: total lib groups members: %u\n"),
+ program_name, Lib_group::total_members);
+ fprintf(stderr, _("%s: loaded lib groups members: %u\n"),
+ program_name, Lib_group::total_members_loaded);
+}
+
+Task_token*
+Add_lib_group_symbols::is_runnable()
+{
+ if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+ return this->this_blocker_;
+ return NULL;
+}
+
+void
+Add_lib_group_symbols::locks(Task_locker* tl)
+{
+ tl->add(this, this->next_blocker_);
+}
+
+void
+Add_lib_group_symbols::run(Workqueue*)
+{
+ this->lib_->add_symbols(this->symtab_, this->layout_, this->input_objects_);
+}
+
+Add_lib_group_symbols::~Add_lib_group_symbols()
+{
+ if (this->this_blocker_ != NULL)
+ delete this->this_blocker_;
+ // next_blocker_ is deleted by the task associated with the next
+ // input file.
+}
+
} // End namespace gold.