From 9eb9fa57c2a9eec4c08491715d3341df811b7f9c Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@google.com>
Date: Tue, 25 Sep 2007 17:50:26 +0000
Subject: [PATCH] Add cache parameter to get_view.  Discard uncached views on
 unlock. Fix bug this exposed in archive armap symbol name handling.

---
 gold/archive.cc  | 27 +++++++++-------
 gold/archive.h   | 17 +++++-----
 gold/dynobj.cc   | 12 +++++---
 gold/fileread.cc | 94 +++++++++++++++++++++++++++-----------------------------
 gold/fileread.h  | 34 ++++++++++++--------
 gold/merge.cc    |  4 +--
 gold/object.cc   | 29 +++++++++--------
 gold/object.h    | 19 +++++++-----
 gold/reloc.cc    | 13 +++++---
 gold/symtab.cc   |  3 +-
 10 files changed, 140 insertions(+), 112 deletions(-)

diff --git a/gold/archive.cc b/gold/archive.cc
index 7398076..bbd24c8 100644
--- a/gold/archive.cc
+++ b/gold/archive.cc
@@ -101,7 +101,7 @@ Archive::setup()
   if (xname == "/")
     {
       const unsigned char* p = this->get_view(off + sizeof(Archive_header),
-                                              extended_size);
+                                              extended_size, false);
       const char* px = reinterpret_cast<const char*>(p);
       this->extended_names_.assign(px, extended_size);
     }
@@ -116,7 +116,7 @@ void
 Archive::read_armap(off_t start, off_t size)
 {
   // Read in the entire armap.
-  const unsigned char* p = this->get_view(start, size);
+  const unsigned char* p = this->get_view(start, size, false);
 
   // Numbers in the armap are always big-endian.
   const elfcpp::Elf_Word* pword = reinterpret_cast<const elfcpp::Elf_Word*>(p);
@@ -125,14 +125,17 @@ Archive::read_armap(off_t start, off_t size)
 
   // Note that the addition is in units of sizeof(elfcpp::Elf_Word).
   const char* pnames = reinterpret_cast<const char*>(pword + nsyms);
+  off_t names_size = reinterpret_cast<const char*>(p) + size - pnames;
+  this->armap_names_.assign(pnames, names_size);
 
   this->armap_.resize(nsyms);
 
+  off_t name_offset = 0;
   for (unsigned int i = 0; i < nsyms; ++i)
     {
-      this->armap_[i].name = pnames;
-      this->armap_[i].offset = elfcpp::Swap<32, true>::readval(pword);
-      pnames += strlen(pnames) + 1;
+      this->armap_[i].name_offset = name_offset;
+      this->armap_[i].file_offset = elfcpp::Swap<32, true>::readval(pword);
+      name_offset += strlen(pnames + name_offset) + 1;
       ++pword;
     }
 
@@ -155,7 +158,7 @@ Archive::read_armap(off_t start, off_t size)
 off_t
 Archive::read_header(off_t off, std::string* pname)
 {
-  const unsigned char* p = this->get_view(off, sizeof(Archive_header));
+  const unsigned char* p = this->get_view(off, sizeof(Archive_header), false);
   const Archive_header* hdr = reinterpret_cast<const Archive_header*>(p);
   return this->interpret_header(hdr, off,  pname);
 }
@@ -283,20 +286,22 @@ Archive::add_symbols(Symbol_table* symtab, Layout* layout,
 	{
           if (this->armap_checked_[i])
             continue;
-	  if (this->armap_[i].offset == last_seen_offset)
+	  if (this->armap_[i].file_offset == last_seen_offset)
             {
               this->armap_checked_[i] = true;
               continue;
             }
-	  if (this->seen_offsets_.find(this->armap_[i].offset)
+	  if (this->seen_offsets_.find(this->armap_[i].file_offset)
               != this->seen_offsets_.end())
 	    {
               this->armap_checked_[i] = true;
-	      last_seen_offset = this->armap_[i].offset;
+	      last_seen_offset = this->armap_[i].file_offset;
 	      continue;
 	    }
 
-	  Symbol* sym = symtab->lookup(this->armap_[i].name);
+	  const char* sym_name = (this->armap_names_.data()
+				  + this->armap_[i].name_offset);
+	  Symbol* sym = symtab->lookup(sym_name);
 	  if (sym == NULL)
 	    continue;
 	  else if (!sym->is_undefined())
@@ -308,7 +313,7 @@ Archive::add_symbols(Symbol_table* symtab, Layout* layout,
 	    continue;
 
 	  // We want to include this object in the link.
-	  last_seen_offset = this->armap_[i].offset;
+	  last_seen_offset = this->armap_[i].file_offset;
 	  this->seen_offsets_.insert(last_seen_offset);
           this->armap_checked_[i] = true;
 	  this->include_member(symtab, layout, input_objects,
diff --git a/gold/archive.h b/gold/archive.h
index 7ebdf47..61d4d4b 100644
--- a/gold/archive.h
+++ b/gold/archive.h
@@ -44,7 +44,8 @@ class Archive
 {
  public:
   Archive(const std::string& name, Input_file* input_file)
-    : name_(name), input_file_(input_file), armap_(), extended_names_()
+    : name_(name), input_file_(input_file), armap_(), armap_names_(),
+      extended_names_(), armap_checked_(), seen_offsets_()
   { }
 
   // The length of the magic string at the start of an archive.
@@ -98,8 +99,8 @@ class Archive
 
   // Get a view into the underlying file.
   const unsigned char*
-  get_view(off_t start, off_t size)
-  { return this->input_file_->file().get_view(start, size); }
+  get_view(off_t start, off_t size, bool cache)
+  { return this->input_file_->file().get_view(start, size, cache); }
 
   // Read the archive symbol map.
   void
@@ -126,10 +127,10 @@ class Archive
   // An entry in the archive map of symbols to object files.
   struct Armap_entry
   {
-    // The symbol name.
-    const char* name;
-    // The offset to the file.
-    off_t offset;
+    // The offset to the symbol name in armap_names_.
+    off_t name_offset;
+    // The file offset to the object in the archive.
+    off_t file_offset;
   };
 
   // A simple hash code for off_t values.
@@ -146,6 +147,8 @@ class Archive
   Input_file* input_file_;
   // The archive map.
   std::vector<Armap_entry> armap_;
+  // The names in the archive map.
+  std::string armap_names_;
   // The extended name table.
   std::string extended_names_;
   // Track which symbols in the archive map are for elements which are
diff --git a/gold/dynobj.cc b/gold/dynobj.cc
index b6255f8..2ccb8f5 100644
--- a/gold/dynobj.cc
+++ b/gold/dynobj.cc
@@ -174,7 +174,8 @@ Sized_dynobj<size, big_endian>::read_dynsym_section(
       gold_exit(false);
     }
 
-  *view = this->get_lasting_view(shdr.get_sh_offset(), shdr.get_sh_size());
+  *view = this->get_lasting_view(shdr.get_sh_offset(), shdr.get_sh_size(),
+				 false);
   *view_size = shdr.get_sh_size();
   *view_info = shdr.get_sh_info();
 }
@@ -198,7 +199,7 @@ Sized_dynobj<size, big_endian>::set_soname(const unsigned char* pshdrs,
 
   const off_t dynamic_size = dynamicshdr.get_sh_size();
   const unsigned char* pdynamic = this->get_view(dynamicshdr.get_sh_offset(),
-						 dynamic_size);
+						 dynamic_size, false);
 
   const unsigned int link = dynamicshdr.get_sh_link();
   if (link != strtab_shndx)
@@ -223,7 +224,7 @@ Sized_dynobj<size, big_endian>::set_soname(const unsigned char* pshdrs,
 	}
 
       strtab_size = strtabshdr.get_sh_size();
-      strtabu = this->get_view(strtabshdr.get_sh_offset(), strtab_size);
+      strtabu = this->get_view(strtabshdr.get_sh_offset(), strtab_size, false);
     }
 
   for (const unsigned char* p = pdynamic;
@@ -295,7 +296,7 @@ Sized_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
       gold_assert(dynsymshdr.get_sh_type() == elfcpp::SHT_DYNSYM);
 
       sd->symbols = this->get_lasting_view(dynsymshdr.get_sh_offset(),
-					   dynsymshdr.get_sh_size());
+					   dynsymshdr.get_sh_size(), false);
       sd->symbols_size = dynsymshdr.get_sh_size();
 
       // Get the symbol names.
@@ -319,7 +320,8 @@ Sized_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
 	}
 
       sd->symbol_names = this->get_lasting_view(strtabshdr.get_sh_offset(),
-						strtabshdr.get_sh_size());
+						strtabshdr.get_sh_size(),
+						true);
       sd->symbol_names_size = strtabshdr.get_sh_size();
 
       // Get the version information.
diff --git a/gold/fileread.cc b/gold/fileread.cc
index 9b800e8..3cb2685 100644
--- a/gold/fileread.cc
+++ b/gold/fileread.cc
@@ -136,6 +136,8 @@ File_read::unlock()
 {
   gold_assert(this->lock_count_ > 0);
   --this->lock_count_;
+  if (this->lock_count_ == 0)
+    this->clear_views(false);
 }
 
 bool
@@ -160,54 +162,44 @@ File_read::find_view(off_t start, off_t size)
 }
 
 // Read SIZE bytes from the file starting at offset START.  Read into
-// the buffer at P.  Return the number of bytes read, which should
-// always be at least SIZE except at the end of the file.
+// the buffer at P.
 
-off_t
+void
 File_read::do_read(off_t start, off_t size, void* p)
 {
   gold_assert(this->lock_count_ > 0);
 
+  off_t bytes;
   if (this->contents_ != NULL)
     {
-      off_t bytes = this->size_ - start;
-      if (bytes < 0)
-	bytes = 0;
-      else if (bytes > size)
-	bytes = size;
-      memcpy(p, this->contents_ + start, bytes);
-      return bytes;
+      bytes = this->size_ - start;
+      if (bytes >= size)
+	{
+	  memcpy(p, this->contents_ + start, size);
+	  return;
+	}
     }
-
-  off_t bytes = ::pread(this->descriptor_, p, size, start);
-  if (bytes < 0)
+  else
     {
-      fprintf(stderr, _("%s: %s: pread failed: %s\n"),
-	      program_name, this->filename().c_str(), strerror(errno));
-      gold_exit(false);
-    }
-
-  return bytes;
-}
-
-// Read exactly SIZE bytes from the file starting at offset START.
-// Read into the buffer at P.
+      bytes = ::pread(this->descriptor_, p, size, start);
+      if (bytes == size)
+	return;
 
-void
-File_read::do_read_exact(off_t start, off_t size, void* p)
-{
-  off_t bytes = this->do_read(start, size, p);
-  if (bytes != size)
-    {
-      fprintf(stderr,
-	      _("%s: %s: file too short: read only %lld of %lld "
-		"bytes at %lld\n"),
-	      program_name, this->filename().c_str(),
-	      static_cast<long long>(bytes),
-	      static_cast<long long>(size),
-	      static_cast<long long>(start));
-      gold_exit(false);
+      if (bytes < 0)
+	{
+	  fprintf(stderr, _("%s: %s: pread failed: %s\n"),
+		  program_name, this->filename().c_str(), strerror(errno));
+	  gold_exit(false);
+	}
     }
+
+  fprintf(stderr,
+	  _("%s: %s: file too short: read only %lld of %lld bytes at %lld\n"),
+	  program_name, this->filename().c_str(),
+	  static_cast<long long>(bytes),
+	  static_cast<long long>(size),
+	  static_cast<long long>(start));
+  gold_exit(false);
 }
 
 // Read data from the file.
@@ -224,13 +216,13 @@ File_read::read(off_t start, off_t size, void* p)
       return;
     }
 
-  this->do_read_exact(start, size, p);
+  this->do_read(start, size, p);
 }
 
 // Find an existing view or make a new one.
 
 File_read::View*
-File_read::find_or_make_view(off_t start, off_t size)
+File_read::find_or_make_view(off_t start, off_t size, bool cache)
 {
   gold_assert(this->lock_count_ > 0);
 
@@ -245,7 +237,11 @@ File_read::find_or_make_view(off_t start, off_t size)
       // There was an existing view at this offset.
       File_read::View* v = ins.first->second;
       if (v->size() - (start - v->start()) >= size)
-	return v;
+	{
+	  if (cache)
+	    v->set_cache();
+	  return v;
+	}
 
       // This view is not large enough.
       this->saved_views_.push_back(v);
@@ -264,9 +260,9 @@ File_read::find_or_make_view(off_t start, off_t size)
 
   unsigned char* p = new unsigned char[psize];
 
-  this->do_read_exact(poff, psize, p);
+  this->do_read(poff, psize, p);
 
-  File_read::View* v = new File_read::View(poff, psize, p);
+  File_read::View* v = new File_read::View(poff, psize, p, cache);
   ins.first->second = v;
   return v;
 }
@@ -276,18 +272,18 @@ File_read::find_or_make_view(off_t start, off_t size)
 // mmap.
 
 const unsigned char*
-File_read::get_view(off_t start, off_t size)
+File_read::get_view(off_t start, off_t size, bool cache)
 {
   gold_assert(this->lock_count_ > 0);
-  File_read::View* pv = this->find_or_make_view(start, size);
+  File_read::View* pv = this->find_or_make_view(start, size, cache);
   return pv->data() + (start - pv->start());
 }
 
 File_view*
-File_read::get_lasting_view(off_t start, off_t size)
+File_read::get_lasting_view(off_t start, off_t size, bool cache)
 {
   gold_assert(this->lock_count_ > 0);
-  File_read::View* pv = this->find_or_make_view(start, size);
+  File_read::View* pv = this->find_or_make_view(start, size, cache);
   pv->lock();
   return new File_view(*this, pv, pv->data() + (start - pv->start()));
 }
@@ -301,7 +297,8 @@ File_read::clear_views(bool destroying)
        p != this->views_.end();
        ++p)
     {
-      if (!p->second->is_locked())
+      if (!p->second->is_locked()
+	  && (destroying || !p->second->should_cache()))
 	delete p->second;
       else
 	{
@@ -314,7 +311,8 @@ File_read::clear_views(bool destroying)
   Saved_views::iterator p = this->saved_views_.begin();
   while (p != this->saved_views_.end())
     {
-      if (!(*p)->is_locked())
+      if (!(*p)->is_locked()
+	  && (destroying || !(*p)->should_cache()))
 	{
 	  delete *p;
 	  p = this->saved_views_.erase(p);
diff --git a/gold/fileread.h b/gold/fileread.h
index ef5efc0..0e5caa9 100644
--- a/gold/fileread.h
+++ b/gold/fileread.h
@@ -88,9 +88,12 @@ class File_read
   // Return a view into the file starting at file offset START for
   // SIZE bytes.  The pointer will remain valid until the File_read is
   // unlocked.  It is an error if we can not read enough data from the
-  // file.
+  // file.  The CACHE parameter is a hint as to whether it will be
+  // useful to cache this data for later accesses--i.e., later calls
+  // to get_view, read, or get_lasting_view which retrieve the same
+  // data.
   const unsigned char*
-  get_view(off_t start, off_t size);
+  get_view(off_t start, off_t size, bool cache);
 
   // Read data from the file into the buffer P starting at file offset
   // START for SIZE bytes.
@@ -101,9 +104,10 @@ class File_read
   // for SIZE bytes.  This is allocated with new, and the caller is
   // responsible for deleting it when done.  The data associated with
   // this view will remain valid until the view is deleted.  It is an
-  // error if we can not read enough data from the file.
+  // error if we can not read enough data from the file.  The CACHE
+  // parameter is as in get_view.
   File_view*
-  get_lasting_view(off_t start, off_t size);
+  get_lasting_view(off_t start, off_t size, bool cache);
 
  private:
   // This class may not be copied.
@@ -114,8 +118,9 @@ class File_read
   class View
   {
    public:
-    View(off_t start, off_t size, const unsigned char* data)
-      : start_(start), size_(size), data_(data), lock_count_(0)
+    View(off_t start, off_t size, const unsigned char* data, bool cache)
+      : start_(start), size_(size), data_(data), lock_count_(0),
+	cache_(cache)
     { }
 
     ~View();
@@ -141,6 +146,14 @@ class File_read
     bool
     is_locked();
 
+    void
+    set_cache()
+    { this->cache_ = true; }
+
+    bool
+    should_cache() const
+    { return this->cache_; }
+
    private:
     View(const View&);
     View& operator=(const View&);
@@ -149,6 +162,7 @@ class File_read
     off_t size_;
     const unsigned char* data_;
     int lock_count_;
+    bool cache_;
   };
 
   friend class File_view;
@@ -158,16 +172,12 @@ class File_read
   find_view(off_t start, off_t size);
 
   // Read data from the file into a buffer.
-  off_t
-  do_read(off_t start, off_t size, void* p);
-
-  // Read an exact number of bytes into a buffer.
   void
-  do_read_exact(off_t start, off_t size, void* p);
+  do_read(off_t start, off_t size, void* p);
 
   // Find or make a view into the file.
   View*
-  find_or_make_view(off_t start, off_t size);
+  find_or_make_view(off_t start, off_t size, bool cache);
 
   // Clear the file views.
   void
diff --git a/gold/merge.cc b/gold/merge.cc
index f6f45c9..0db62ef 100644
--- a/gold/merge.cc
+++ b/gold/merge.cc
@@ -177,7 +177,7 @@ bool
 Output_merge_data::do_add_input_section(Relobj* object, unsigned int shndx)
 {
   off_t len;
-  const unsigned char* p = object->section_contents(shndx, &len);
+  const unsigned char* p = object->section_contents(shndx, &len, false);
 
   uint64_t entsize = this->entsize();
 
@@ -237,7 +237,7 @@ Output_merge_string<Char_type>::do_add_input_section(Relobj* object,
 						     unsigned int shndx)
 {
   off_t len;
-  const unsigned char* pdata = object->section_contents(shndx, &len);
+  const unsigned char* pdata = object->section_contents(shndx, &len, false);
 
   const Char_type* p = reinterpret_cast<const Char_type*>(pdata);
 
diff --git a/gold/object.cc b/gold/object.cc
index 336eaf6..d64e120 100644
--- a/gold/object.cc
+++ b/gold/object.cc
@@ -73,11 +73,11 @@ Object::error(const char* format, ...)
 // Return a view of the contents of a section.
 
 const unsigned char*
-Object::section_contents(unsigned int shndx, off_t* plen)
+Object::section_contents(unsigned int shndx, off_t* plen, bool cache)
 {
   Location loc(this->do_section_contents(shndx));
   *plen = loc.data_size;
-  return this->get_view(loc.file_offset, loc.data_size);
+  return this->get_view(loc.file_offset, loc.data_size, cache);
 }
 
 // Read the section data into SD.  This is code common to Sized_relobj
@@ -93,7 +93,7 @@ Object::read_section_data(elfcpp::Elf_file<size, big_endian, Object>* elf_file,
   // Read the section headers.
   const off_t shoff = elf_file->shoff();
   const unsigned int shnum = this->shnum();
-  sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size);
+  sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size, true);
 
   // Read the section names.
   const unsigned char* pshdrs = sd->section_headers->data();
@@ -111,7 +111,7 @@ Object::read_section_data(elfcpp::Elf_file<size, big_endian, Object>* elf_file,
 
   sd->section_names_size = shdrnames.get_sh_size();
   sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(),
-					     sd->section_names_size);
+					     sd->section_names_size, false);
 }
 
 // If NAME is the name of a special .gnu.warning section, arrange for
@@ -239,7 +239,7 @@ Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
   off_t extsize = symtabshdr.get_sh_size() - locsize;
 
   // Read the symbol table.
-  File_view* fvsymtab = this->get_lasting_view(extoff, extsize);
+  File_view* fvsymtab = this->get_lasting_view(extoff, extsize, false);
 
   // Read the section header for the symbol names.
   unsigned int strtab_shndx = symtabshdr.get_sh_link();
@@ -261,7 +261,7 @@ Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
 
   // Read the symbol names.
   File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(),
-					       strtabshdr.get_sh_size());
+					       strtabshdr.get_sh_size(), true);
 
   sd->symbols = fvsymtab;
   sd->symbols_size = extsize;
@@ -285,7 +285,7 @@ Sized_relobj<size, big_endian>::include_section_group(
 {
   // Read the section contents.
   const unsigned char* pcon = this->get_view(shdr.get_sh_offset(),
-					     shdr.get_sh_size());
+					     shdr.get_sh_size(), false);
   const elfcpp::Elf_Word* pword =
     reinterpret_cast<const elfcpp::Elf_Word*>(pcon);
 
@@ -314,13 +314,14 @@ Sized_relobj<size, big_endian>::include_section_group(
       gold_exit(false);
     }
   off_t symoff = symshdr.get_sh_offset() + shdr.get_sh_info() * This::sym_size;
-  const unsigned char* psym = this->get_view(symoff, This::sym_size);
+  const unsigned char* psym = this->get_view(symoff, This::sym_size, true);
   elfcpp::Sym<size, big_endian> sym(psym);
 
   // Read the symbol table names.
   off_t symnamelen;
   const unsigned char* psymnamesu;
-  psymnamesu = this->section_contents(symshdr.get_sh_link(), &symnamelen);
+  psymnamesu = this->section_contents(symshdr.get_sh_link(), &symnamelen,
+				      true);
   const char* psymnames = reinterpret_cast<const char*>(psymnamesu);
 
   // Get the section group signature.
@@ -557,7 +558,7 @@ Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
   gold_assert(loccount == symtabshdr.get_sh_info());
   off_t locsize = loccount * sym_size;
   const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
-					      locsize);
+					      locsize, true);
 
   this->local_values_.resize(loccount);
 
@@ -565,7 +566,8 @@ Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
   const unsigned int strtab_shndx = symtabshdr.get_sh_link();
   off_t strtab_size;
   const unsigned char* pnamesu = this->section_contents(strtab_shndx,
-							&strtab_size);
+							&strtab_size,
+							true);
   const char* pnames = reinterpret_cast<const char*>(pnamesu);
 
   // Loop over the local symbols.
@@ -700,13 +702,14 @@ Sized_relobj<size, big_endian>::write_local_symbols(Output_file* of,
   const int sym_size = This::sym_size;
   off_t locsize = loccount * sym_size;
   const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
-					      locsize);
+					      locsize, false);
 
   // Read the symbol names.
   const unsigned int strtab_shndx = symtabshdr.get_sh_link();
   off_t strtab_size;
   const unsigned char* pnamesu = this->section_contents(strtab_shndx,
-							&strtab_size);
+							&strtab_size,
+							true);
   const char* pnames = reinterpret_cast<const char*>(pnamesu);
 
   // Get a view into the output file.
diff --git a/gold/object.h b/gold/object.h
index 55935c1..cc1d5b2 100644
--- a/gold/object.h
+++ b/gold/object.h
@@ -168,9 +168,9 @@ class Object
   { return this->shnum_; }
 
   // Return a view of the contents of a section.  Set *PLEN to the
-  // size.
+  // size.  CACHE is a hint as in File_read::get_view.
   const unsigned char*
-  section_contents(unsigned int shndx, off_t* plen);
+  section_contents(unsigned int shndx, off_t* plen, bool cache);
 
   // Return the name of a section given a section index.  This is only
   // used for error messages.
@@ -224,7 +224,7 @@ class Object
   // Return a View.
   View
   view(off_t file_offset, off_t data_size)
-  { return View(this->get_view(file_offset, data_size)); }
+  { return View(this->get_view(file_offset, data_size, true)); }
 
   // Report an error.
   void
@@ -243,7 +243,7 @@ class Object
 
   // Get a View given a Location.
   View view(Location loc)
-  { return View(this->get_view(loc.file_offset, loc.data_size)); }
+  { return View(this->get_view(loc.file_offset, loc.data_size, true)); }
 
  protected:
   // Read the symbols--implemented by child class.
@@ -284,15 +284,18 @@ class Object
 
   // Get a view into the underlying file.
   const unsigned char*
-  get_view(off_t start, off_t size)
-  { return this->input_file_->file().get_view(start + this->offset_, size); }
+  get_view(off_t start, off_t size, bool cache)
+  {
+    return this->input_file_->file().get_view(start + this->offset_, size,
+					      cache);
+  }
 
   // Get a lasting view into the underlying file.
   File_view*
-  get_lasting_view(off_t start, off_t size)
+  get_lasting_view(off_t start, off_t size, bool cache)
   {
     return this->input_file_->file().get_lasting_view(start + this->offset_,
-						      size);
+						      size, cache);
   }
 
   // Read data from the underlying file.
diff --git a/gold/reloc.cc b/gold/reloc.cc
index d4674bb..ad3bb05 100644
--- a/gold/reloc.cc
+++ b/gold/reloc.cc
@@ -172,7 +172,8 @@ Sized_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
   rd->relocs.reserve(shnum / 2);
 
   const unsigned char *pshdrs = this->get_view(this->elf_file_.shoff(),
-					       shnum * This::shdr_size);
+					       shnum * This::shdr_size,
+					       true);
   // Skip the first, dummy, section.
   const unsigned char *ps = pshdrs + This::shdr_size;
   for (unsigned int i = 1; i < shnum; ++i, ps += This::shdr_size)
@@ -242,7 +243,8 @@ Sized_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
       Section_relocs& sr(rd->relocs.back());
       sr.reloc_shndx = i;
       sr.data_shndx = shndx;
-      sr.contents = this->get_lasting_view(shdr.get_sh_offset(), sh_size);
+      sr.contents = this->get_lasting_view(shdr.get_sh_offset(), sh_size,
+					   true);
       sr.sh_type = sh_type;
       sr.reloc_count = reloc_count;
     }
@@ -261,7 +263,7 @@ Sized_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
       gold_assert(loccount == symtabshdr.get_sh_info());
       off_t locsize = loccount * sym_size;
       rd->local_symbols = this->get_lasting_view(symtabshdr.get_sh_offset(),
-						 locsize);
+						 locsize, true);
     }
 }
 
@@ -316,7 +318,8 @@ Sized_relobj<size, big_endian>::do_relocate(const General_options& options,
 
   // Read the section headers.
   const unsigned char* pshdrs = this->get_view(this->elf_file_.shoff(),
-					       shnum * This::shdr_size);
+					       shnum * This::shdr_size,
+					       true);
 
   Views views;
   views.resize(shnum);
@@ -455,7 +458,7 @@ Sized_relobj<size, big_endian>::relocate_sections(
 
       off_t sh_size = shdr.get_sh_size();
       const unsigned char* prelocs = this->get_view(shdr.get_sh_offset(),
-						    sh_size);
+						    sh_size, false);
 
       unsigned int reloc_size;
       if (sh_type == elfcpp::SHT_REL)
diff --git a/gold/symtab.cc b/gold/symtab.cc
index 8cd55cd..c68b9ca 100644
--- a/gold/symtab.cc
+++ b/gold/symtab.cc
@@ -1550,7 +1550,8 @@ Warnings::note_warnings(Symbol_table* symtab)
 	    Task_locker_obj<Object> tl(*p->second.object);
 	    const unsigned char* c;
 	    off_t len;
-	    c = p->second.object->section_contents(p->second.shndx, &len);
+	    c = p->second.object->section_contents(p->second.shndx, &len,
+						   false);
 	    p->second.set_text(reinterpret_cast<const char*>(c), len);
 	  }
 	}
-- 
2.7.4