// plugin.cc -- plugin manager for gold -*- C++ -*-
-// Copyright 2008, 2009 Free Software Foundation, Inc.
+// Copyright 2008, 2009, 2010 Free Software Foundation, Inc.
// Written by Cary Coutant <ccoutant@google.com>.
// This file is part of gold.
get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms);
static enum ld_plugin_status
-add_input_file(char *pathname);
+add_input_file(const char *pathname);
static enum ld_plugin_status
-add_input_library(char *pathname);
+add_input_library(const char *pathname);
+
+static enum ld_plugin_status
+set_extra_library_path(const char *path);
static enum ld_plugin_status
message(int level, const char *format, ...);
this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW);
if (this->handle_ == NULL)
{
- gold_error(_("%s: could not load plugin library"),
- this->filename_.c_str());
+ gold_error(_("%s: could not load plugin library: %s"),
+ this->filename_.c_str(), dlerror());
return;
}
sscanf(ver, "%d.%d", &major, &minor);
// Allocate and populate a transfer vector.
- const int tv_fixed_size = 14;
+ const int tv_fixed_size = 16;
int tv_size = this->args_.size() + tv_fixed_size;
- ld_plugin_tv *tv = new ld_plugin_tv[tv_size];
+ ld_plugin_tv* tv = new ld_plugin_tv[tv_size];
// Put LDPT_MESSAGE at the front of the list so the plugin can use it
// while processing subsequent entries.
else
tv[i].tv_u.tv_val = LDPO_EXEC;
+ ++i;
+ tv[i].tv_tag = LDPT_OUTPUT_NAME;
+ tv[i].tv_u.tv_string = parameters->options().output();
+
for (unsigned int j = 0; j < this->args_.size(); ++j)
{
++i;
tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY;
tv[i].tv_u.tv_add_input_library = add_input_library;
+ ++i;
+ tv[i].tv_tag = LDPT_SET_EXTRA_LIBRARY_PATH;
+ tv[i].tv_u.tv_set_extra_library_path = set_extra_library_path;
+
++i;
tv[i].tv_tag = LDPT_NULL;
tv[i].tv_u.tv_val = 0;
// Call the plugin claim-file handler.
inline bool
-Plugin::claim_file(struct ld_plugin_input_file *plugin_input_file)
+Plugin::claim_file(struct ld_plugin_input_file* plugin_input_file)
{
int claimed = 0;
void
Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task,
Input_objects* input_objects,
- Symbol_table* symtab, Layout* alayout,
+ Symbol_table* symtab, Layout* layout,
Dirsearch* dirpath, Mapfile* mapfile,
Task_token** last_blocker)
{
this->task_ = task;
this->input_objects_ = input_objects;
this->symtab_ = symtab;
- this->layout_ = alayout;
+ this->layout_ = layout;
this->dirpath_ = dirpath;
this->mapfile_ = mapfile;
this->this_blocker_ = NULL;
ld_plugin_status
Plugin_manager::get_input_file(unsigned int handle,
- struct ld_plugin_input_file *file)
+ struct ld_plugin_input_file* file)
{
Pluginobj* obj = this->object(handle);
if (obj == NULL)
return LDPS_OK;
}
+// Add a new library path.
+
+ld_plugin_status
+Plugin_manager::set_extra_library_path(const char* path)
+{
+ this->extra_search_path_ = std::string(path);
+ return LDPS_OK;
+}
+
// Add a new input file.
ld_plugin_status
-Plugin_manager::add_input_file(char *pathname, bool is_lib)
+Plugin_manager::add_input_file(const char* pathname, bool is_lib)
{
Input_file_argument file(pathname,
(is_lib
? Input_file_argument::INPUT_FILE_TYPE_LIBRARY
: Input_file_argument::INPUT_FILE_TYPE_FILE),
- "", false, this->options_);
+ (is_lib
+ ? this->extra_search_path_.c_str()
+ : ""),
+ false,
+ this->options_);
Input_argument* input_argument = new Input_argument(file);
Task_token* next_blocker = new Task_token(true);
next_blocker->add_blocker();
- if (this->layout_->incremental_inputs())
+ if (parameters->options().incremental())
gold_error(_("input files added by plug-ins in --incremental mode not "
"supported yet"));
this->workqueue_->queue_soon(new Read_symbols(this->input_objects_,
this->mapfile_,
input_argument,
NULL,
+ NULL,
this->this_blocker_,
next_blocker));
this->this_blocker_ = next_blocker;
// Class Pluginobj.
-Pluginobj::Pluginobj(const std::string& aname, Input_file* ainput_file,
- off_t aoffset, off_t afilesize)
- : Object(aname, ainput_file, false, aoffset),
- nsyms_(0), syms_(NULL), symbols_(), filesize_(afilesize), comdat_map_()
+Pluginobj::Pluginobj(const std::string& name, Input_file* input_file,
+ off_t offset, off_t filesize)
+ : Object(name, input_file, false, offset),
+ nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_()
{
}
{
if (nsyms > this->nsyms_)
return LDPS_NO_SYMS;
+
+ if (static_cast<size_t>(nsyms) > this->symbols_.size())
+ {
+ // We never decided to include this object. We mark all symbols as
+ // preempted.
+ gold_assert(this->symbols_.size() == 0);
+ for (int i = 0; i < nsyms; i++)
+ syms[i].resolution = LDPR_PREEMPTED_REG;
+ return LDPS_OK;
+ }
+
for (int i = 0; i < nsyms; i++)
{
ld_plugin_symbol* isym = &syms[i];
// The original symbol was undefined or common.
if (lsym->source() != Symbol::FROM_OBJECT)
res = LDPR_RESOLVED_EXEC;
+ else if (lsym->object()->pluginobj() == this)
+ res = (is_visible_from_outside(lsym)
+ ? LDPR_PREVAILING_DEF
+ : LDPR_PREVAILING_DEF_IRONLY);
else if (lsym->object()->pluginobj() != NULL)
res = LDPR_RESOLVED_IR;
else if (lsym->object()->is_dynamic())
// should be kept.
bool
-Pluginobj::include_comdat_group(std::string comdat_key, Layout* alayout)
+Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout)
{
std::pair<Comdat_map::iterator, bool> ins =
this->comdat_map_.insert(std::make_pair(comdat_key, false));
// If this is the first time we've seen this comdat key, ask the
// layout object whether it should be included.
if (ins.second)
- ins.first->second = alayout->find_or_add_kept_section(comdat_key,
- NULL, 0, true,
- true, NULL);
+ ins.first->second = layout->find_or_add_kept_section(comdat_key,
+ NULL, 0, true,
+ true, NULL);
return ins.first->second;
}
template<int size, bool big_endian>
Sized_pluginobj<size, big_endian>::Sized_pluginobj(
- const std::string& aname,
- Input_file* ainput_file,
- off_t aoffset,
- off_t afilesize)
- : Pluginobj(aname, ainput_file, aoffset, afilesize)
+ const std::string& name,
+ Input_file* input_file,
+ off_t offset,
+ off_t filesize)
+ : Pluginobj(name, input_file, offset, filesize)
{
}
void
Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
Read_symbols_data*,
- Layout* alayout)
+ Layout* layout)
{
const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
unsigned char symbuf[sym_size];
for (int i = 0; i < this->nsyms_; ++i)
{
- const struct ld_plugin_symbol *isym = &this->syms_[i];
- const char* aname = isym->name;
+ const struct ld_plugin_symbol* isym = &this->syms_[i];
+ const char* name = isym->name;
const char* ver = isym->version;
elfcpp::Elf_Half shndx;
elfcpp::STB bind;
elfcpp::STV vis;
- if (aname != NULL && aname[0] == '\0')
- aname = NULL;
+ if (name != NULL && name[0] == '\0')
+ name = NULL;
if (ver != NULL && ver[0] == '\0')
ver = NULL;
switch (isym->visibility)
{
case LDPV_PROTECTED:
- vis = elfcpp::STV_DEFAULT;
+ vis = elfcpp::STV_PROTECTED;
break;
case LDPV_INTERNAL:
- vis = elfcpp::STV_DEFAULT;
+ vis = elfcpp::STV_INTERNAL;
break;
case LDPV_HIDDEN:
- vis = elfcpp::STV_DEFAULT;
+ vis = elfcpp::STV_HIDDEN;
break;
case LDPV_DEFAULT:
default:
if (isym->comdat_key != NULL
&& isym->comdat_key[0] != '\0'
- && !this->include_comdat_group(isym->comdat_key, alayout))
+ && !this->include_comdat_group(isym->comdat_key, layout))
shndx = elfcpp::SHN_UNDEF;
osym.put_st_name(0);
osym.put_st_shndx(shndx);
this->symbols_[i] =
- symtab->add_from_pluginobj<size, big_endian>(this, aname, ver, &sym);
+ symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym);
+ }
+}
+
+template<int size, bool big_endian>
+Archive::Should_include
+Sized_pluginobj<size, big_endian>::do_should_include_member(
+ Symbol_table* symtab,
+ Layout* layout,
+ Read_symbols_data*,
+ std::string* why)
+{
+ char* tmpbuf = NULL;
+ size_t tmpbuflen = 0;
+
+ for (int i = 0; i < this->nsyms_; ++i)
+ {
+ const struct ld_plugin_symbol& sym = this->syms_[i];
+ const char* name = sym.name;
+ Symbol* symbol;
+ Archive::Should_include t = Archive::should_include_member(symtab,
+ layout,
+ name,
+ &symbol, why,
+ &tmpbuf,
+ &tmpbuflen);
+ if (t == Archive::SHOULD_INCLUDE_YES)
+ {
+ if (tmpbuf != NULL)
+ free(tmpbuf);
+ return t;
+ }
}
+ if (tmpbuf != NULL)
+ free(tmpbuf);
+ return Archive::SHOULD_INCLUDE_UNKNOWN;
}
// Get the size of a section. Not used for plugin objects.
gold_unreachable();
}
+// Get symbols. Not used for plugin objects.
+
+template<int size, bool big_endian>
+const Object::Symbols*
+Sized_pluginobj<size, big_endian>::do_get_global_symbols() const
+{
+ gold_unreachable();
+}
+
// Class Plugin_finish. This task runs after all replacement files have
-// been added. It calls each plugin's cleanup handler.
+// been added. For now, it's a placeholder for a possible plugin API
+// to allow the plugin to release most of its resources. The cleanup
+// handlers must be called later, because they can remove the temporary
+// object files that are needed until the end of the link.
class Plugin_finish : public Task
{
void
run(Workqueue*)
{
- Plugin_manager* plugins = parameters->options().plugins();
- gold_assert(plugins != NULL);
- plugins->cleanup();
+ // We could call early cleanup handlers here.
}
std::string
Plugin_hook::run(Workqueue* workqueue)
{
gold_assert(this->options_.has_plugins());
+ Symbol* start_sym;
+ if (parameters->options().entry())
+ start_sym = this->symtab_->lookup(parameters->options().entry());
+ else
+ start_sym = this->symtab_->lookup("_start");
+ if (start_sym != NULL)
+ start_sym->set_in_real_elf();
+
this->options_.plugins()->all_symbols_read(workqueue,
this,
this->input_objects_,
// Add symbols from a plugin-claimed input file.
static enum ld_plugin_status
-add_symbols(void* handle, int nsyms, const ld_plugin_symbol *syms)
+add_symbols(void* handle, int nsyms, const ld_plugin_symbol* syms)
{
gold_assert(parameters->options().has_plugins());
Pluginobj* obj = parameters->options().plugins()->make_plugin_object(
// file descriptor.
static enum ld_plugin_status
-get_input_file(const void *handle, struct ld_plugin_input_file *file)
+get_input_file(const void* handle, struct ld_plugin_input_file* file)
{
gold_assert(parameters->options().has_plugins());
unsigned int obj_index =
// Release the input file.
static enum ld_plugin_status
-release_input_file(const void *handle)
+release_input_file(const void* handle)
{
gold_assert(parameters->options().has_plugins());
unsigned int obj_index =
// Get the symbol resolution info for a plugin-claimed input file.
static enum ld_plugin_status
-get_symbols(const void * handle, int nsyms, ld_plugin_symbol* syms)
+get_symbols(const void* handle, int nsyms, ld_plugin_symbol* syms)
{
gold_assert(parameters->options().has_plugins());
Pluginobj* obj = parameters->options().plugins()->object(
// Add a new (real) input file generated by a plugin.
static enum ld_plugin_status
-add_input_file(char *pathname)
+add_input_file(const char* pathname)
{
gold_assert(parameters->options().has_plugins());
return parameters->options().plugins()->add_input_file(pathname, false);
// Add a new (real) library required by a plugin.
static enum ld_plugin_status
-add_input_library(char *pathname)
+add_input_library(const char* pathname)
{
gold_assert(parameters->options().has_plugins());
return parameters->options().plugins()->add_input_file(pathname, true);
}
+// Set the extra library path to be used by libraries added via
+// add_input_library
+
+static enum ld_plugin_status
+set_extra_library_path(const char* path)
+{
+ gold_assert(parameters->options().has_plugins());
+ return parameters->options().plugins()->set_extra_library_path(path);
+}
+
// Issue a diagnostic message from a plugin.
static enum ld_plugin_status
-message(int level, const char * format, ...)
+message(int level, const char* format, ...)
{
va_list args;
va_start(args, format);
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