// fileread.cc -- read files for gold
-// Copyright 2006, 2007, 2008, 2009 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 "target.h"
#include "binary.h"
#include "descriptors.h"
+#include "gold-threads.h"
#include "fileread.h"
#ifndef HAVE_READV
File_read::View::~View()
{
gold_assert(!this->is_locked());
- if (!this->mapped_)
- delete[] this->data_;
- else
+ switch (this->data_ownership_)
{
+ case DATA_ALLOCATED_ARRAY:
+ delete[] this->data_;
+ break;
+ case DATA_MMAPPED:
if (::munmap(const_cast<unsigned char*>(this->data_), this->size_) != 0)
gold_warning(_("munmap failed: %s"), strerror(errno));
-
File_read::current_mapped_bytes -= this->size_;
+ break;
+ case DATA_NOT_OWNED:
+ break;
+ default:
+ gold_unreachable();
}
}
// Class File_read.
+// A lock for the File_read static variables.
+static Lock* file_counts_lock = NULL;
+static Initialize_lock file_counts_initialize_lock(&file_counts_lock);
+
// The File_read static variables.
unsigned long long File_read::total_mapped_bytes;
unsigned long long File_read::current_mapped_bytes;
this->is_descriptor_opened_ = false;
}
this->name_.clear();
- this->clear_views(true);
+ this->clear_views(CLEAR_VIEWS_ALL);
}
// Open the file.
this->size_ = s.st_size;
gold_debug(DEBUG_FILES, "Attempt to open %s succeeded",
this->name_.c_str());
-
this->token_.add_writer(task);
}
&& !this->is_descriptor_opened_
&& this->name_.empty());
this->name_ = name;
- this->contents_ = contents;
+ this->whole_file_view_ = new View(0, size, contents, 0, false,
+ View::DATA_NOT_OWNED);
+ this->add_view(this->whole_file_view_);
this->size_ = size;
this->token_.add_writer(task);
return true;
{
gold_assert(this->is_locked());
- File_read::total_mapped_bytes += this->mapped_bytes_;
- File_read::current_mapped_bytes += this->mapped_bytes_;
+ if (!parameters->options_valid() || parameters->options().stats())
+ {
+ file_counts_initialize_lock.initialize();
+ Hold_optional_lock hl(file_counts_lock);
+ File_read::total_mapped_bytes += this->mapped_bytes_;
+ File_read::current_mapped_bytes += this->mapped_bytes_;
+ if (File_read::current_mapped_bytes > File_read::maximum_mapped_bytes)
+ File_read::maximum_mapped_bytes = File_read::current_mapped_bytes;
+ }
+
this->mapped_bytes_ = 0;
- if (File_read::current_mapped_bytes > File_read::maximum_mapped_bytes)
- File_read::maximum_mapped_bytes = File_read::current_mapped_bytes;
// Only clear views if there is only one attached object. Otherwise
// we waste time trying to clear cached archive views. Similarly
// for releasing the descriptor.
if (this->object_count_ <= 1)
{
- this->clear_views(false);
+ this->clear_views(CLEAR_VIEWS_NORMAL);
if (this->is_descriptor_opened_)
{
release_descriptor(this->descriptor_, false);
if (vshifted != NULL)
*vshifted = NULL;
+ // If we have the whole file mmapped, and the alignment is right,
+ // we can return it.
+ if (this->whole_file_view_)
+ if (byteshift == -1U || byteshift == 0)
+ return this->whole_file_view_;
+
off_t page = File_read::page_offset(start);
unsigned int bszero = 0;
File_read::do_read(off_t start, section_size_type size, void* p)
{
ssize_t bytes;
- if (this->contents_ != NULL)
+ if (this->whole_file_view_ != NULL)
{
bytes = this->size_ - start;
if (static_cast<section_size_type>(bytes) >= size)
{
- memcpy(p, this->contents_ + start, size);
+ memcpy(p, this->whole_file_view_->data() + start, size);
return;
}
}
}
File_read::View* v;
- if (this->contents_ != NULL || byteshift != 0)
+ if (byteshift != 0)
{
unsigned char* p = new unsigned char[psize + byteshift];
memset(p, 0, byteshift);
this->do_read(poff, psize, p + byteshift);
- v = new File_read::View(poff, psize, p, byteshift, cache, false);
+ v = new File_read::View(poff, psize, p, byteshift, cache,
+ View::DATA_ALLOCATED_ARRAY);
}
else
{
this->mapped_bytes_ += psize;
const unsigned char* pbytes = static_cast<const unsigned char*>(p);
- v = new File_read::View(poff, psize, pbytes, 0, cache, true);
+ v = new File_read::View(poff, psize, pbytes, 0, cache,
+ View::DATA_MMAPPED);
}
this->add_view(v);
byteshift = (target_size / 8) - byteshift;
}
+ // If --map-whole-files is set, make sure we have a
+ // whole file view. Options may not yet be ready, e.g.,
+ // when reading a version script. We then default to
+ // --no-map-whole-files.
+ if (this->whole_file_view_ == NULL
+ && parameters->options_valid()
+ && parameters->options().map_whole_files())
+ this->whole_file_view_ = this->make_view(0, this->size_, 0, cache);
+
// Try to find a View with the required BYTESHIFT.
File_read::View* vshifted;
File_read::View* v = this->find_view(offset + start, size,
memset(pbytes, 0, byteshift);
memcpy(pbytes + byteshift, v->data() + v->byteshift(), v->size());
- File_read::View* shifted_view = new File_read::View(v->start(), v->size(),
- pbytes, byteshift,
- cache, false);
+ File_read::View* shifted_view =
+ new File_read::View(v->start(), v->size(), pbytes, byteshift,
+ cache, View::DATA_ALLOCATED_ARRAY);
this->add_view(shifted_view);
return shifted_view;
// the next object.
void
-File_read::clear_views(bool destroying)
+File_read::clear_views(Clear_views_mode mode)
{
+ bool keep_files_mapped = (parameters->options_valid()
+ && parameters->options().keep_files_mapped());
Views::iterator p = this->views_.begin();
while (p != this->views_.end())
{
bool should_delete;
- if (p->second->is_locked())
+ if (p->second->is_locked() || p->second->is_permanent_view())
should_delete = false;
- else if (destroying)
+ else if (mode == CLEAR_VIEWS_ALL)
should_delete = true;
- else if (p->second->should_cache())
+ else if (p->second->should_cache() && keep_files_mapped)
should_delete = false;
- else if (this->object_count_ > 1 && p->second->accessed())
+ else if (this->object_count_ > 1
+ && p->second->accessed()
+ && mode != CLEAR_VIEWS_ARCHIVE)
should_delete = false;
else
should_delete = true;
if (should_delete)
{
+ if (p->second == this->whole_file_view_)
+ this->whole_file_view_ = NULL;
delete p->second;
// map::erase invalidates only the iterator to the deleted
}
else
{
- gold_assert(!destroying);
p->second->clear_accessed();
++p;
}
}
else
{
- gold_assert(!destroying);
+ gold_assert(mode != CLEAR_VIEWS_ALL);
++q;
}
}
if (fstat(this->descriptor_, &file_stat) < 0)
gold_fatal(_("%s: stat failed: %s"), this->name_.c_str(),
strerror(errno));
- // TODO: do a configure check if st_mtim is present and get the
- // nanoseconds part if it is.
+#ifdef HAVE_STAT_ST_MTIM
+ return Timespec(file_stat.st_mtim.tv_sec, file_stat.st_mtim.tv_nsec);
+#else
return Timespec(file_stat.st_mtime, 0);
+#endif
}
// Open the file.
this->input_argument_->options().format_enum();
bool ok;
if (format == General_options::OBJECT_FORMAT_ELF)
- ok = this->file_.open(task, name);
+ {
+ ok = this->file_.open(task, name);
+ this->format_ = FORMAT_ELF;
+ }
else
{
gold_assert(format == General_options::OBJECT_FORMAT_BINARY);
ok = this->open_binary(task, name);
+ this->format_ = FORMAT_BINARY;
}
if (!ok)
{
gold_error(_("cannot open %s: %s"),
name.c_str(), strerror(errno));
+ this->format_ = FORMAT_NONE;
return false;
}
projects / binutils-gdb.git / blobdiff