// fileread.cc -- read files for gold
-// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 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>
+
+#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
+#endif
#ifdef HAVE_READV
#include <sys/uio.h>
#include "gold-threads.h"
#include "fileread.h"
+// For systems without mmap support.
+#ifndef HAVE_MMAP
+# define mmap gold_mmap
+# define munmap gold_munmap
+# ifndef MAP_FAILED
+# define MAP_FAILED (reinterpret_cast<void*>(-1))
+# endif
+# ifndef PROT_READ
+# define PROT_READ 0
+# endif
+# ifndef MAP_PRIVATE
+# define MAP_PRIVATE 0
+# endif
+
+# ifndef ENOSYS
+# define ENOSYS EINVAL
+# endif
+
+static void *
+gold_mmap(void *, size_t, int, int, int, off_t)
+{
+ errno = ENOSYS;
+ return MAP_FAILED;
+}
+
+static int
+gold_munmap(void *, size_t)
+{
+ errno = ENOSYS;
+ return -1;
+}
+
+#endif
+
#ifndef HAVE_READV
struct iovec { void* iov_base; size_t iov_len; };
ssize_t
namespace gold
{
+// Get the last modified time of an unopened file.
+
+bool
+get_mtime(const char* filename, Timespec* mtime)
+{
+ struct stat file_stat;
+
+ if (stat(filename, &file_stat) < 0)
+ return false;
+#ifdef HAVE_STAT_ST_MTIM
+ mtime->seconds = file_stat.st_mtim.tv_sec;
+ mtime->nanoseconds = file_stat.st_mtim.tv_nsec;
+#else
+ mtime->seconds = file_stat.st_mtime;
+ mtime->nanoseconds = 0;
+#endif
+ return true;
+}
+
+// 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()
switch (this->data_ownership_)
{
case DATA_ALLOCATED_ARRAY:
- delete[] this->data_;
+ free(const_cast<unsigned char*>(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_;
+ gold_warning(_("munmap failed: %s"), strerror(errno));
+ 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.
-// 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;
-
File_read::~File_read()
{
gold_assert(this->token_.is_writable());
this->name_.c_str(), strerror(errno));
this->size_ = s.st_size;
gold_debug(DEBUG_FILES, "Attempt to open %s succeeded",
- this->name_.c_str());
+ this->name_.c_str());
this->token_.add_writer(task);
}
&& this->name_.empty());
this->name_ = name;
this->whole_file_view_ = new View(0, size, contents, 0, false,
- View::DATA_NOT_OWNED);
+ View::DATA_NOT_OWNED);
this->add_view(this->whole_file_view_);
this->size_ = size;
this->token_.add_writer(task);
File_read::lock(const Task* task)
{
gold_assert(this->released_);
+ gold_debug(DEBUG_FILES, "Locking file \"%s\"", this->name_.c_str());
this->token_.add_writer(task);
this->released_ = false;
}
void
File_read::unlock(const Task* task)
{
+ gold_debug(DEBUG_FILES, "Unlocking file \"%s\"", this->name_.c_str());
this->release();
this->token_.remove_writer(task);
}
File_read::find_view(off_t start, section_size_type size,
unsigned int byteshift, File_read::View** vshifted) const
{
+ gold_assert(start <= this->size_
+ && (static_cast<unsigned long long>(size)
+ <= static_cast<unsigned long long>(this->size_ - start)));
+
if (vshifted != NULL)
*vshifted = NULL;
else
{
this->reopen_descriptor();
- bytes = ::pread(this->descriptor_, p, size, start);
- if (static_cast<section_size_type>(bytes) == size)
- return;
- if (bytes < 0)
+ char *read_ptr = static_cast<char *>(p);
+ off_t read_pos = start;
+ size_t to_read = size;
+ do
{
- gold_fatal(_("%s: pread failed: %s"),
- this->filename().c_str(), strerror(errno));
- return;
+ bytes = ::pread(this->descriptor_, read_ptr, to_read, read_pos);
+ if (bytes < 0)
+ gold_fatal(_("%s: pread failed: %s"),
+ this->filename().c_str(), strerror(errno));
+
+ read_pos += bytes;
+ read_ptr += bytes;
+ to_read -= bytes;
+ if (to_read == 0)
+ return;
}
+ while (bytes > 0);
+
+ bytes = size - to_read;
}
gold_fatal(_("%s: file too short: read only %lld of %lld bytes at %lld"),
unsigned int byteshift, bool cache)
{
gold_assert(size > 0);
-
- // Check that start and end of the view are within the file.
- if (start > this->size_
- || (static_cast<unsigned long long>(size)
- > static_cast<unsigned long long>(this->size_ - start)))
- gold_fatal(_("%s: attempt to map %lld bytes at offset %lld exceeds "
- "size of file; the file may be corrupt"),
- this->filename().c_str(),
- static_cast<long long>(size),
- static_cast<long long>(start));
+ gold_assert(start <= this->size_
+ && (static_cast<unsigned long long>(size)
+ <= static_cast<unsigned long long>(this->size_ - start)));
off_t poff = File_read::page_offset(start);
gold_assert(psize >= size);
}
- File_read::View* v;
+ void* p;
+ View::Data_ownership ownership;
if (byteshift != 0)
{
- unsigned char* p = new unsigned char[psize + byteshift];
+ p = malloc(psize + byteshift);
+ if (p == NULL)
+ gold_nomem();
memset(p, 0, byteshift);
- this->do_read(poff, psize, p + byteshift);
- v = new File_read::View(poff, psize, p, byteshift, cache,
- View::DATA_ALLOCATED_ARRAY);
+ this->do_read(poff, psize, static_cast<unsigned char*>(p) + byteshift);
+ ownership = View::DATA_ALLOCATED_ARRAY;
}
else
{
this->reopen_descriptor();
- void* p = ::mmap(NULL, psize, PROT_READ, MAP_PRIVATE,
- this->descriptor_, poff);
- if (p == MAP_FAILED)
- gold_fatal(_("%s: mmap offset %lld size %lld failed: %s"),
- this->filename().c_str(),
- static_cast<long long>(poff),
- static_cast<long long>(psize),
- strerror(errno));
-
- this->mapped_bytes_ += psize;
-
- const unsigned char* pbytes = static_cast<const unsigned char*>(p);
- v = new File_read::View(poff, psize, pbytes, 0, cache,
- View::DATA_MMAPPED);
+ p = ::mmap(NULL, psize, PROT_READ, MAP_PRIVATE, this->descriptor_, poff);
+ if (p != MAP_FAILED)
+ {
+ ownership = View::DATA_MMAPPED;
+ this->mapped_bytes_ += psize;
+ }
+ else
+ {
+ p = malloc(psize);
+ if (p == NULL)
+ gold_nomem();
+ this->do_read(poff, psize, p);
+ ownership = View::DATA_ALLOCATED_ARRAY;
+ }
}
+ const unsigned char* pbytes = static_cast<const unsigned char*>(p);
+ File_read::View* v = new File_read::View(poff, psize, pbytes, byteshift,
+ cache, ownership);
+
this->add_view(v);
return v;
File_read::find_or_make_view(off_t offset, off_t start,
section_size_type size, bool aligned, bool cache)
{
+ // Check that start and end of the view are within the file.
+ if (start > this->size_
+ || (static_cast<unsigned long long>(size)
+ > static_cast<unsigned long long>(this->size_ - start)))
+ gold_fatal(_("%s: attempt to map %lld bytes at offset %lld exceeds "
+ "size of file; the file may be corrupt"),
+ this->filename().c_str(),
+ static_cast<long long>(size),
+ static_cast<long long>(start));
+
unsigned int byteshift;
if (offset == 0)
byteshift = 0;
{
gold_assert(aligned);
- unsigned char* pbytes = new unsigned char[v->size() + byteshift];
+ unsigned char* pbytes;
+ pbytes = static_cast<unsigned char*>(malloc(v->size() + byteshift));
+ if (pbytes == NULL)
+ gold_nomem();
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,
+ new File_read::View(v->start(), v->size(), pbytes, byteshift,
cache, View::DATA_ALLOCATED_ARRAY);
this->add_view(shifted_view);
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;
{
const Read_multiple_entry& k_entry(rm[k]);
gold_assert((convert_to_section_size_type(k_entry.file_offset
- - i_off)
- + k_entry.size)
+ - i_off)
+ + k_entry.size)
<= convert_to_section_size_type(end_off
- - i_off));
+ - i_off));
memcpy(k_entry.buffer,
v + (k_entry.file_offset - i_off),
k_entry.size);
should_delete = false;
else if (mode == CLEAR_VIEWS_ALL)
should_delete = true;
- else if (p->second->should_cache() && keep_files_mapped)
+ else if ((p->second->should_cache()
+ || p->second == this->whole_file_view_)
+ && keep_files_mapped)
should_delete = false;
else if (this->object_count_ > 1
- && p->second->accessed()
- && mode != CLEAR_VIEWS_ARCHIVE)
+ && p->second->accessed()
+ && mode != CLEAR_VIEWS_ARCHIVE)
should_delete = false;
else
should_delete = true;
// Class Input_file.
+// Create a file given just the filename.
+
+Input_file::Input_file(const char* name)
+ : found_name_(), file_(), is_in_sysroot_(false), format_(FORMAT_NONE)
+{
+ this->input_argument_ =
+ new Input_file_argument(name, Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", false, Position_dependent_options());
+}
+
// Create a file for testing.
Input_file::Input_file(const Task* task, const char* name,
{
this->input_argument_ =
new Input_file_argument(name, Input_file_argument::INPUT_FILE_TYPE_FILE,
- "", false, Position_dependent_options());
+ "", false, Position_dependent_options());
bool ok = this->file_.open(task, name, contents, size);
gold_assert(ok);
}
{
struct stat file_stat;
this->reopen_descriptor();
-
+
if (fstat(this->descriptor_, &file_stat) < 0)
gold_fatal(_("%s: stat failed: %s"), this->name_.c_str(),
strerror(errno));
else if (input_argument->is_lib()
|| input_argument->is_searched_file())
{
- std::string n1, n2;
+ std::vector<std::string> names;
+ names.reserve(2);
if (input_argument->is_lib())
{
- n1 = "lib";
- n1 += input_argument->name();
+ std::string prefix = "lib";
+ prefix += input_argument->name();
if (parameters->options().is_static()
|| !input_argument->options().Bdynamic())
- n1 += ".a";
+ names.push_back(prefix + ".a");
else
{
- n2 = n1 + ".a";
- n1 += ".so";
+ names.push_back(prefix + ".so");
+ names.push_back(prefix + ".a");
}
}
else
- n1 = input_argument->name();
-
- if (Input_file::try_extra_search_path(pindex, input_argument, n1,
- found_name, namep))
- return true;
+ names.push_back(input_argument->name());
- if (!n2.empty() && Input_file::try_extra_search_path(pindex,
- input_argument, n2,
- found_name, namep))
- return true;
+ for (std::vector<std::string>::const_iterator n = names.begin();
+ n != names.end();
+ ++n)
+ if (Input_file::try_extra_search_path(pindex, input_argument, *n,
+ found_name, namep))
+ return true;
// It is not in the extra_search_path.
- name = dirpath.find(n1, n2, is_in_sysroot, pindex);
+ name = dirpath.find(names, is_in_sysroot, pindex, found_name);
if (name.empty())
{
gold_error(_("cannot find %s%s"),
- input_argument->is_lib() ? "-l" : "",
+ input_argument->is_lib() ? "-l" : "",
input_argument->name());
return false;
}
- if (n2.empty() || name[name.length() - 1] == 'o')
- *found_name = n1;
- else
- *found_name = n2;
*namep = name;
return true;
}
gold_assert(input_argument->extra_search_path() != NULL);
if (try_extra_search_path(pindex, input_argument, input_argument->name(),
- found_name, namep))
- return true;
+ 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);
+ --index;
+ name = dirpath.find(std::vector<std::string>(1, input_argument->name()),
+ is_in_sysroot, &index, found_name);
if (name.empty())
- {
- gold_error(_("cannot find %s"),
- input_argument->name());
- return false;
- }
+ {
+ gold_error(_("cannot find %s"),
+ input_argument->name());
+ return false;
+ }
+ *namep = name;
*pindex = index + 1;
return true;
}
projects / deliverable / binutils-gdb.git / blobdiff