// fileread.cc -- read files for gold
-// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include <cstring>
#include <cerrno>
+#include <climits>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
+
+#ifdef HAVE_READV
#include <sys/uio.h>
+#endif
+
#include <sys/stat.h>
#include "filenames.h"
#include "target.h"
#include "binary.h"
#include "descriptors.h"
+#include "gold-threads.h"
#include "fileread.h"
#ifndef HAVE_READV
-struct iovec { void* iov_base; size_t iov_len };
+struct iovec { void* iov_base; size_t iov_len; };
ssize_t
readv(int, const iovec*, int)
{
namespace gold
{
+// 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;
+unsigned long long File_read::maximum_mapped_bytes;
+
// Class File_read::View.
File_read::View::~View()
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_;
+ if (!parameters->options_valid() || parameters->options().stats())
+ {
+ file_counts_initialize_lock.initialize();
+ Hold_optional_lock hl(file_counts_lock);
+ File_read::current_mapped_bytes -= this->size_;
+ }
break;
case DATA_NOT_OWNED:
break;
// Class File_read.
-// The File_read static variables.
-unsigned long long File_read::total_mapped_bytes;
-unsigned long long File_read::current_mapped_bytes;
-unsigned long long File_read::maximum_mapped_bytes;
-
File_read::~File_read()
{
gold_assert(this->token_.is_writable());
this->is_descriptor_opened_ = false;
}
this->name_.clear();
- this->clear_views(true);
- if (this->whole_file_view_)
- delete this->whole_file_view_;
+ 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());
-
- // Options may not yet be ready e.g. when reading a version
- // script. We then default to --no-keep-files-mapped.
- if (parameters->options_valid()
- && parameters->options().keep_files_mapped())
- {
- const unsigned char* contents = static_cast<const unsigned char*>(
- ::mmap(NULL, this->size_, PROT_READ, MAP_PRIVATE,
- this->descriptor_, 0));
- if (contents == MAP_FAILED)
- gold_fatal(_("%s: mmap failed: %s"), this->filename().c_str(),
- strerror(errno));
- this->whole_file_view_ = new View(0, this->size_, contents, 0, false,
- View::DATA_MMAPPED);
- this->mapped_bytes_ += this->size_;
- }
-
this->token_.add_writer(task);
}
this->name_ = name;
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);
}
File_read::View* v;
- if (this->whole_file_view_ != NULL || byteshift != 0)
+ if (byteshift != 0)
{
unsigned char* p = new unsigned char[psize + byteshift];
memset(p, 0, byteshift);
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,
got, want, static_cast<long long>(base + first_offset));
}
+// Portable IOV_MAX.
+
+#if !defined(HAVE_READV)
+#define GOLD_IOV_MAX 1
+#elif defined(IOV_MAX)
+#define GOLD_IOV_MAX IOV_MAX
+#else
+#define GOLD_IOV_MAX (File_read::max_readv_entries * 2)
+#endif
+
// Read several pieces of data from the file.
void
File_read::read_multiple(off_t base, const Read_multiple& rm)
{
+ static size_t iov_max = GOLD_IOV_MAX;
size_t count = rm.size();
size_t i = 0;
while (i < count)
size_t j;
for (j = i + 1; j < count; ++j)
{
- if (j - i >= File_read::max_readv_entries)
+ if (j - i >= File_read::max_readv_entries || j - i >= iov_max / 2)
break;
const Read_multiple_entry& j_entry(rm[j]);
off_t j_off = j_entry.file_offset;
// 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;
}
}
#endif
}
-// Open the file.
+// Try to find a file in the extra search dirs. Returns true on success.
+
+bool
+Input_file::try_extra_search_path(int* pindex,
+ const Input_file_argument* input_argument,
+ std::string filename, std::string* found_name,
+ std::string* namep)
+{
+ if (input_argument->extra_search_path() == NULL)
+ return false;
+
+ std::string name = input_argument->extra_search_path();
+ if (!IS_DIR_SEPARATOR(name[name.length() - 1]))
+ name += '/';
+ name += filename;
+
+ struct stat dummy_stat;
+ if (*pindex > 0 || ::stat(name.c_str(), &dummy_stat) < 0)
+ return false;
+
+ *found_name = filename;
+ *namep = name;
+ return true;
+}
+// Find the actual file.
// If the filename is not absolute, we assume it is in the current
// directory *except* when:
// A) input_argument_->is_lib() is true;
// the file location, rather than the current directory.
bool
-Input_file::open(const Dirsearch& dirpath, const Task* task, int *pindex)
+Input_file::find_file(const Dirsearch& dirpath, int* pindex,
+ const Input_file_argument* input_argument,
+ bool* is_in_sysroot,
+ std::string* found_name, std::string* namep)
{
std::string name;
// Case 1: name is an absolute file, just try to open it
// Case 2: name is relative but is_lib is false, is_searched_file is false,
// and extra_search_path is empty
- if (IS_ABSOLUTE_PATH(this->input_argument_->name())
- || (!this->input_argument_->is_lib()
- && !this->input_argument_->is_searched_file()
- && this->input_argument_->extra_search_path() == NULL))
+ if (IS_ABSOLUTE_PATH(input_argument->name())
+ || (!input_argument->is_lib()
+ && !input_argument->is_searched_file()
+ && input_argument->extra_search_path() == NULL))
{
- name = this->input_argument_->name();
- this->found_name_ = name;
+ name = input_argument->name();
+ *found_name = name;
+ *namep = name;
+ return true;
}
// Case 3: is_lib is true or is_searched_file is true
- else if (this->input_argument_->is_lib()
- || this->input_argument_->is_searched_file())
+ else if (input_argument->is_lib()
+ || input_argument->is_searched_file())
{
- // We don't yet support extra_search_path with -l.
- gold_assert(this->input_argument_->extra_search_path() == NULL);
std::string n1, n2;
- if (this->input_argument_->is_lib())
+ if (input_argument->is_lib())
{
n1 = "lib";
- n1 += this->input_argument_->name();
+ n1 += input_argument->name();
if (parameters->options().is_static()
- || !this->input_argument_->options().Bdynamic())
+ || !input_argument->options().Bdynamic())
n1 += ".a";
else
{
}
}
else
- n1 = this->input_argument_->name();
- name = dirpath.find(n1, n2, &this->is_in_sysroot_, pindex);
+ n1 = input_argument->name();
+
+ if (Input_file::try_extra_search_path(pindex, input_argument, n1,
+ found_name, namep))
+ return true;
+
+ if (!n2.empty() && Input_file::try_extra_search_path(pindex,
+ input_argument, n2,
+ found_name, namep))
+ return true;
+
+ // It is not in the extra_search_path.
+ name = dirpath.find(n1, n2, is_in_sysroot, pindex);
if (name.empty())
{
gold_error(_("cannot find %s%s"),
- this->input_argument_->is_lib() ? "-l" : "",
- this->input_argument_->name());
+ input_argument->is_lib() ? "-l" : "",
+ input_argument->name());
return false;
}
if (n2.empty() || name[name.length() - 1] == 'o')
- this->found_name_ = n1;
+ *found_name = n1;
else
- this->found_name_ = n2;
+ *found_name = n2;
+ *namep = name;
+ return true;
}
// Case 4: extra_search_path is not empty
else
{
- gold_assert(this->input_argument_->extra_search_path() != NULL);
-
- // First, check extra_search_path.
- name = this->input_argument_->extra_search_path();
- if (!IS_DIR_SEPARATOR (name[name.length() - 1]))
- name += '/';
- name += this->input_argument_->name();
- struct stat dummy_stat;
- if (*pindex > 0 || ::stat(name.c_str(), &dummy_stat) < 0)
+ gold_assert(input_argument->extra_search_path() != NULL);
+
+ if (try_extra_search_path(pindex, input_argument, input_argument->name(),
+ found_name, namep))
+ return true;
+
+ // extra_search_path failed, so check the normal search-path.
+ int index = *pindex;
+ if (index > 0)
+ --index;
+ name = dirpath.find(input_argument->name(), "",
+ is_in_sysroot, &index);
+ if (name.empty())
{
- // extra_search_path failed, so check the normal search-path.
- int index = *pindex;
- if (index > 0)
- --index;
- name = dirpath.find(this->input_argument_->name(), "",
- &this->is_in_sysroot_, &index);
- if (name.empty())
- {
- gold_error(_("cannot find %s"),
- this->input_argument_->name());
- return false;
- }
- *pindex = index + 1;
+ gold_error(_("cannot find %s"),
+ input_argument->name());
+ return false;
}
- this->found_name_ = this->input_argument_->name();
+ *found_name = input_argument->name();
+ *namep = name;
+ *pindex = index + 1;
+ return true;
}
+}
+
+// Open the file.
+
+bool
+Input_file::open(const Dirsearch& dirpath, const Task* task, int* pindex)
+{
+ std::string name;
+ if (!Input_file::find_file(dirpath, pindex, this->input_argument_,
+ &this->is_in_sysroot_, &this->found_name_, &name))
+ return false;
// Now that we've figured out where the file lives, try to open it.
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 / deliverable / binutils-gdb.git / blobdiff