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authorIan Lance Taylor <iant@google.com>2007-12-01 06:34:12 +0000
committerIan Lance Taylor <iant@google.com>2007-12-01 06:34:12 +0000
commit96803768f1845a2c5af362ea2dc6b39a147d3930 (patch)
tree1ff1ce0a11218dd449f822cfc42c17626627491b /gold/compressed_output.cc
parentf80c84b330870d86697702c95506f127264fac3a (diff)
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Compress all debug sections.
Diffstat (limited to 'gold/compressed_output.cc')
-rw-r--r--gold/compressed_output.cc177
1 files changed, 25 insertions, 152 deletions
diff --git a/gold/compressed_output.cc b/gold/compressed_output.cc
index bf5f640..d12bfda 100644
--- a/gold/compressed_output.cc
+++ b/gold/compressed_output.cc
@@ -26,8 +26,8 @@
#include <zlib.h>
#endif
-#include "compressed_output.h"
#include "parameters.h"
+#include "compressed_output.h"
namespace gold
{
@@ -89,187 +89,60 @@ zlib_compressed_suffix(unsigned long uncompressed_size)
return std::string(".zlib.") + size_string;
}
-// Class Output_compressed_section_data.
-
-// Add an input section. In this case, we just keep track of the sections.
-
-bool
-Output_compressed_section_data::do_add_input_section(Relobj* obj,
- unsigned int shndx)
-{
- this->objects_.push_back(Object_entry(obj, shndx));
- return true;
-}
+// Class Output_compressed_section.
// Set the final data size of a compressed section. This is where
// we actually compress the section data.
void
-Output_compressed_section_data::set_final_data_size()
+Output_compressed_section::set_final_data_size()
{
- // FIXME: assert that relocations have already been applied.
-
- off_t uncompressed_size = 0;
- for (std::vector<Object_entry>::iterator it = this->objects_.begin();
- it != this->objects_.end();
- ++it)
- {
- it->contents
- = it->object->section_contents(it->shndx, &it->length, false);
- uncompressed_size += it->length;
- }
+ off_t uncompressed_size = this->postprocessing_buffer_size();
// (Try to) compress the data.
unsigned long compressed_size;
- char* uncompressed_data = new char[uncompressed_size];
- off_t pos = 0;
- for (std::vector<Object_entry>::const_iterator it = this->objects_.begin();
- it != this->objects_.end();
- ++it)
- {
- memcpy(uncompressed_data + pos,
- reinterpret_cast<const char*>(it->contents),
- it->length);
- pos += it->length;
- }
+ unsigned char* u_uncompressed_data = this->postprocessing_buffer();
+ char* uncompressed_data = reinterpret_cast<char*>(u_uncompressed_data);
+
+ // At this point the contents of all regular input sections will
+ // have been copied into the postprocessing buffer, and relocations
+ // will have been applied. Now we need to copy in the contents of
+ // anything other than a regular input section.
+ this->write_to_postprocessing_buffer();
bool success = false;
- if (options_.zlib_compress_debug_sections())
+ if (this->options_->zlib_compress_debug_sections())
success = zlib_compress(uncompressed_data, uncompressed_size,
&this->data_, &compressed_size);
if (success)
{
- delete[] uncompressed_data;
+ std::string suffix(zlib_compressed_suffix(uncompressed_size));
+ this->new_section_name_ = std::string(this->name()) + suffix;
+ this->set_name(this->new_section_name_.c_str());
this->set_data_size(compressed_size);
- this->new_section_name_ = zlib_compressed_suffix(uncompressed_size);
}
else
{
- gold_warning(_("Not compressing section data: zlib error"));
+ gold_warning(_("not compressing section data: zlib error"));
gold_assert(this->data_ == NULL);
- this->data_ = uncompressed_data;
this->set_data_size(uncompressed_size);
}
}
-// Change the name of the output section to reflect it's compressed.
-// The layout routines call into this right before finalizing the
-// shstrtab.
-
-const char*
-Output_compressed_section_data::do_modified_output_section_name(
- const char* name)
-{
- // This mean we never compressed the data.
- if (this->new_section_name_.empty())
- return NULL;
- this->new_section_name_ = std::string(name) + this->new_section_name_;
- return this->new_section_name_.c_str();
-}
-
// Write out a compressed section. If we couldn't compress, we just
// write it out as normal, uncompressed data.
void
-Output_compressed_section_data::do_write(Output_file* of)
-{
- unsigned char* uview = of->get_output_view(this->offset(),
- this->data_size());
- char* view = reinterpret_cast<char*>(uview);
- memcpy(view, this->data_, this->data_size());
- of->write_output_view(this->offset(), this->data_size(), uview);
-}
-
-// Class Output_compressed_string.
-
-// Add an input section. We don't do anything special here.
-
-template<typename Char_type>
-bool
-Output_compressed_string<Char_type>::do_add_input_section(Relobj* object,
- unsigned int shndx)
-{
- return Output_merge_string<Char_type>::do_add_input_section(object, shndx);
-}
-
-// Set the final data size of a compressed section. This is where
-// we actually compress the section data.
-
-template<typename Char_type>
-void
-Output_compressed_string<Char_type>::set_final_data_size()
+Output_compressed_section::do_write(Output_file* of)
{
- // First let the superclass finalize all its data, then write it to
- // a buffer.
- unsigned long uncompressed_size = this->finalize_merged_data();
- char* uncompressed_data = new char[uncompressed_size];
- this->stringpool_to_buffer(uncompressed_data, uncompressed_size);
-
- // (Try to) compress the data.
- unsigned long compressed_size;
- if (options_.zlib_compress_debug_sections()
- && zlib_compress(uncompressed_data, uncompressed_size,
- &this->compressed_data_, &compressed_size))
- {
- this->set_data_size(compressed_size);
- // Save some memory.
- this->clear_stringpool();
- // We will be renaming the section to name.zlib.uncompressed_size.
- this->new_section_name_ = zlib_compressed_suffix(uncompressed_size);
- }
+ off_t offset = this->offset();
+ off_t data_size = this->data_size();
+ unsigned char* view = of->get_output_view(offset, data_size);
+ if (this->data_ == NULL)
+ memcpy(view, this->postprocessing_buffer(), data_size);
else
- {
- this->compressed_data_ = NULL;
- this->set_data_size(uncompressed_size);
- }
-
- delete[] uncompressed_data;
+ memcpy(view, this->data_, data_size);
+ of->write_output_view(offset, data_size, view);
}
-// Change the name of the output section to reflect it's compressed.
-// The layout routines call into this right before finalizing the
-// shstrtab.
-
-template<typename Char_type>
-const char*
-Output_compressed_string<Char_type>::do_modified_output_section_name(
- const char* name)
-{
- // This mean we never compressed the data
- if (this->new_section_name_.empty())
- return NULL;
- this->new_section_name_ = std::string(name) + this->new_section_name_;
- return this->new_section_name_.c_str();
-}
-
-// Write out a compressed string section. If we couldn't compress,
-// we just write out the normal string section.
-
-template<typename Char_type>
-void
-Output_compressed_string<Char_type>::do_write(Output_file* of)
-{
- if (this->compressed_data_ == NULL)
- Output_merge_string<Char_type>::do_write(of);
- else
- {
- unsigned char* uview = of->get_output_view(this->offset(),
- this->data_size());
- char* view = reinterpret_cast<char*>(uview);
- memcpy(view, this->compressed_data_, this->data_size());
- of->write_output_view(this->offset(), this->data_size(), uview);
- }
-}
-
-// Instantiate the templates we need.
-
-template
-class Output_compressed_string<char>;
-
-template
-class Output_compressed_string<uint16_t>;
-
-template
-class Output_compressed_string<uint32_t>;
-
} // End namespace gold.