#include "gold.h"
+#include <cerrno>
#include <cstdio>
#include <cstdarg>
#include <cstring>
#include <string>
#include <vector>
+#include <fcntl.h>
+#include <unistd.h>
+#include "libiberty.h"
#ifdef ENABLE_PLUGINS
#ifdef HAVE_DLFCN_H
#endif /* ENABLE_PLUGINS */
#include "parameters.h"
+#include "debug.h"
#include "errors.h"
#include "fileread.h"
#include "layout.h"
#endif // ENABLE_PLUGINS
-static Pluginobj* make_sized_plugin_object(Input_file* input_file,
+static Pluginobj* make_sized_plugin_object(const std::string& filename,
+ Input_file* input_file,
off_t offset, off_t filesize);
// Plugin methods.
Task_token* next_blocker_;
};
+// Plugin_recorder logs plugin actions and saves intermediate files
+// for later replay.
+
+class Plugin_recorder
+{
+ public:
+ Plugin_recorder() : file_count_(0), tempdir_(NULL), logfile_(NULL)
+ { }
+
+ bool
+ init();
+
+ void
+ claimed_file(const std::string& obj_name, off_t offset, off_t filesize,
+ const std::string& plugin_name);
+
+ void
+ unclaimed_file(const std::string& obj_name, off_t offset, off_t filesize);
+
+ void
+ replacement_file(const char* name, bool is_lib);
+
+ void
+ record_symbols(const Object* obj, int nsyms,
+ const struct ld_plugin_symbol* syms);
+
+ void
+ finish()
+ { ::fclose(this->logfile_); }
+
+ private:
+ unsigned int file_count_;
+ const char* tempdir_;
+ FILE* logfile_;
+};
+
+bool
+Plugin_recorder::init()
+{
+ // Create a temporary directory where we can stash the log and
+ // copies of replacement files.
+ char dir_template[] = "gold-recording-XXXXXX";
+ if (mkdtemp(dir_template) == NULL)
+ return false;
+
+ size_t len = strlen(dir_template) + 1;
+ char* tempdir = new char[len];
+ strncpy(tempdir, dir_template, len);
+
+ // Create the log file.
+ std::string logname(tempdir);
+ logname.append("/log");
+ FILE* logfile = ::fopen(logname.c_str(), "w");
+ if (logfile == NULL)
+ return false;
+
+ this->tempdir_ = tempdir;
+ this->logfile_ = logfile;
+
+ gold_info(_("%s: recording to %s"), program_name, this->tempdir_);
+
+ return true;
+}
+
+void
+Plugin_recorder::claimed_file(const std::string& obj_name,
+ off_t offset,
+ off_t filesize,
+ const std::string& plugin_name)
+{
+ fprintf(this->logfile_, "PLUGIN: %s\n", plugin_name.c_str());
+ fprintf(this->logfile_, "CLAIMED: %s", obj_name.c_str());
+ if (offset > 0)
+ fprintf(this->logfile_, " @%ld", static_cast<long>(offset));
+ fprintf(this->logfile_, " %ld\n", static_cast<long>(filesize));
+}
+
+void
+Plugin_recorder::unclaimed_file(const std::string& obj_name,
+ off_t offset,
+ off_t filesize)
+{
+ fprintf(this->logfile_, "UNCLAIMED: %s", obj_name.c_str());
+ if (offset > 0)
+ fprintf(this->logfile_, " @%ld", static_cast<long>(offset));
+ fprintf(this->logfile_, " %ld\n", static_cast<long>(filesize));
+}
+
+// Make a hard link to INNAME from OUTNAME, if possible.
+// If not, copy the file.
+
+static bool
+link_or_copy_file(const char* inname, const char* outname)
+{
+ static char buf[4096];
+
+ if (::link(inname, outname) == 0)
+ return true;
+
+ int in = ::open(inname, O_RDONLY);
+ if (in < 0)
+ {
+ gold_warning(_("%s: can't open (%s)\n"), inname, strerror(errno));
+ return false;
+ }
+ int out = ::open(outname, O_CREAT | O_TRUNC | O_WRONLY, 0600);
+ if (out < 0)
+ {
+ gold_warning(_("%s: can't create (%s)\n"), outname, strerror(errno));
+ ::close(in);
+ return false;
+ }
+ ssize_t len;
+ while ((len = ::read(in, buf, sizeof(buf))) > 0)
+ static_cast<void>(::write(out, buf, len));
+ ::close(in);
+ ::close(out);
+ return true;
+}
+
+void
+Plugin_recorder::replacement_file(const char* name, bool is_lib)
+{
+ fprintf(this->logfile_, "REPLACEMENT: %s", name);
+ if (is_lib)
+ fprintf(this->logfile_, "(lib)");
+ else
+ {
+ char counter[10];
+ const char* basename = lbasename(name);
+ snprintf(counter, sizeof(counter), "%05d", this->file_count_);
+ ++this->file_count_;
+ std::string outname(this->tempdir_);
+ outname.append("/");
+ outname.append(counter);
+ outname.append("-");
+ outname.append(basename);
+ if (link_or_copy_file(name, outname.c_str()))
+ fprintf(this->logfile_, " -> %s", outname.c_str());
+ }
+ fprintf(this->logfile_, "\n");
+}
+
+void
+Plugin_recorder::record_symbols(const Object* obj, int nsyms,
+ const struct ld_plugin_symbol* syms)
+{
+ fprintf(this->logfile_, "SYMBOLS: %d %s\n", nsyms, obj->name().c_str());
+ for (int i = 0; i < nsyms; ++i)
+ {
+ const struct ld_plugin_symbol* isym = &syms[i];
+
+ const char* def;
+ switch (isym->def)
+ {
+ case LDPK_DEF:
+ def = "D";
+ break;
+ case LDPK_WEAKDEF:
+ def = "WD";
+ break;
+ case LDPK_UNDEF:
+ def = "U";
+ break;
+ case LDPK_WEAKUNDEF:
+ def = "WU";
+ break;
+ case LDPK_COMMON:
+ def = "C";
+ break;
+ default:
+ def = "?";
+ break;
+ }
+
+ char vis;
+ switch (isym->visibility)
+ {
+ case LDPV_PROTECTED:
+ vis = 'P';
+ break;
+ case LDPV_INTERNAL:
+ vis = 'I';
+ break;
+ case LDPV_HIDDEN:
+ vis = 'H';
+ break;
+ case LDPV_DEFAULT:
+ vis = 'D';
+ break;
+ default:
+ vis = '?';
+ break;
+ }
+
+ fprintf(this->logfile_, " %5d: %-2s %c %s", i, def, vis, isym->name);
+ if (isym->version != NULL && isym->version[0] != '\0')
+ fprintf(this->logfile_, "@%s", isym->version);
+ if (isym->comdat_key != NULL && isym->comdat_key[0] != '\0')
+ {
+ if (strcmp(isym->name, isym->comdat_key) == 0)
+ fprintf(this->logfile_, " [comdat]");
+ else
+ fprintf(this->logfile_, " [comdat: %s]", isym->comdat_key);
+ }
+ fprintf(this->logfile_, "\n");
+ }
+}
+
// Plugin_manager methods.
Plugin_manager::~Plugin_manager()
delete *obj;
this->objects_.clear();
delete this->lock_;
+ delete this->recorder_;
}
// Load all plugin libraries.
Plugin_manager::load_plugins(Layout* layout)
{
this->layout_ = layout;
+
+ if (is_debugging_enabled(DEBUG_PLUGIN))
+ {
+ this->recorder_ = new Plugin_recorder();
+ this->recorder_->init();
+ }
+
for (this->current_ = this->plugins_.begin();
this->current_ != this->plugins_.end();
++this->current_)
this->any_claimed_ = true;
this->in_claim_file_handler_ = false;
+ if (this->recorder_ != NULL)
+ {
+ const std::string& objname = (elf_object == NULL
+ ? input_file->filename()
+ : elf_object->name());
+ this->recorder_->claimed_file(objname,
+ offset, filesize,
+ (*this->current_)->filename());
+ }
+
if (this->objects_.size() > handle
&& this->objects_[handle]->pluginobj() != NULL)
return this->objects_[handle]->pluginobj();
}
this->in_claim_file_handler_ = false;
+
+ if (this->recorder_ != NULL)
+ this->recorder_->unclaimed_file(input_file->filename(), offset, filesize);
+
return NULL;
}
&& this->objects_[handle]->pluginobj() != NULL)
return NULL;
- Pluginobj* obj = make_sized_plugin_object(this->input_file_,
+ const std::string* filename = &this->input_file_->filename();
+
+ // If the elf object for this file was pushed into the objects_ vector,
+ // use its filename, then delete it to make room for the Pluginobj as
+ // this file is claimed.
+ if (this->objects_.size() != handle)
+ {
+ filename = &this->objects_.back()->name();
+ this->objects_.pop_back();
+ }
+
+ Pluginobj* obj = make_sized_plugin_object(*filename,
+ this->input_file_,
this->plugin_input_file_.offset,
this->plugin_input_file_.filesize);
- // If the elf object for this file was pushed into the objects_ vector, delete
- // it to make room for the Pluginobj as this file is claimed.
- if (this->objects_.size() != handle)
- this->objects_.pop_back();
this->objects_.push_back(obj);
return obj;
if (parameters->incremental())
gold_error(_("input files added by plug-ins in --incremental mode not "
"supported yet"));
+
+ if (this->recorder_ != NULL)
+ this->recorder_->replacement_file(pathname, is_lib);
+
this->workqueue_->queue_soon(new Read_symbols(this->input_objects_,
this->symtab_,
this->layout_,
elfcpp::Sym<size, big_endian> sym(symbuf);
elfcpp::Sym_write<size, big_endian> osym(symbuf);
+ Plugin_recorder* recorder = parameters->options().plugins()->recorder();
+ if (recorder != NULL)
+ recorder->record_symbols(this, this->nsyms_, this->syms_);
+
this->symbols_.resize(this->nsyms_);
for (int i = 0; i < this->nsyms_; ++i)
void
run(Workqueue*)
{
+ Plugin_manager* plugins = parameters->options().plugins();
+ gold_assert(plugins != NULL);
// We could call early cleanup handlers here.
+ if (plugins->recorder())
+ plugins->recorder()->finish();
}
std::string
// Allocate a Pluginobj object of the appropriate size and endianness.
static Pluginobj*
-make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize)
+make_sized_plugin_object(const std::string& filename,
+ Input_file* input_file, off_t offset, off_t filesize)
{
Pluginobj* obj = NULL;
{
if (target.is_big_endian())
#ifdef HAVE_TARGET_32_BIG
- obj = new Sized_pluginobj<32, true>(input_file->filename(),
- input_file, offset, filesize);
+ obj = new Sized_pluginobj<32, true>(filename, input_file,
+ offset, filesize);
#else
gold_error(_("%s: not configured to support "
"32-bit big-endian object"),
- input_file->filename().c_str());
+ filename.c_str());
#endif
else
#ifdef HAVE_TARGET_32_LITTLE
- obj = new Sized_pluginobj<32, false>(input_file->filename(),
- input_file, offset, filesize);
+ obj = new Sized_pluginobj<32, false>(filename, input_file,
+ offset, filesize);
#else
gold_error(_("%s: not configured to support "
"32-bit little-endian object"),
- input_file->filename().c_str());
+ filename.c_str());
#endif
}
else if (target.get_size() == 64)
{
if (target.is_big_endian())
#ifdef HAVE_TARGET_64_BIG
- obj = new Sized_pluginobj<64, true>(input_file->filename(),
- input_file, offset, filesize);
+ obj = new Sized_pluginobj<64, true>(filename, input_file,
+ offset, filesize);
#else
gold_error(_("%s: not configured to support "
"64-bit big-endian object"),
- input_file->filename().c_str());
+ filename.c_str());
#endif
else
#ifdef HAVE_TARGET_64_LITTLE
- obj = new Sized_pluginobj<64, false>(input_file->filename(),
- input_file, offset, filesize);
+ obj = new Sized_pluginobj<64, false>(filename, input_file,
+ offset, filesize);
#else
gold_error(_("%s: not configured to support "
"64-bit little-endian object"),
- input_file->filename().c_str());
+ filename.c_str());
#endif
}
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