X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gold%2Ffileread.h;h=cf92367c2caa3933793d1e03a6262d277ed3faae;hb=2da4b788f7a80ed9589d0e8856584e9dfa2813ff;hp=9933460d5ac534a7ab7e07bbcf5ae03b04108e19;hpb=101654612f383f5427e2d727556eda80537de76b;p=deliverable%2Fbinutils-gdb.git

diff --git a/gold/fileread.h b/gold/fileread.h
index 9933460d5a..cf92367c2c 100644
--- a/gold/fileread.h
+++ b/gold/fileread.h
@@ -1,6 +1,6 @@
 // fileread.h -- read files for gold   -*- C++ -*-
 
-// 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.
@@ -52,6 +52,12 @@ struct Timespec
   int nanoseconds;
 };
 
+// Get the last modified time of an unopened file.  Returns false if the
+// file does not exist.
+
+bool
+get_mtime(const char* filename, Timespec* mtime);
+
 class Position_dependent_options;
 class Input_file_argument;
 class Dirsearch;
@@ -135,12 +141,13 @@ class File_read
   // SIZE bytes.  OFFSET is the offset into the input file for the
   // file we are reading; this is zero for a normal object file,
   // non-zero for an object file in an archive.  ALIGNED is true if
-  // the data must be naturally aligned; this only matters when OFFSET
-  // is not zero.  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.  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
+  // the data must be naturally aligned (i.e., aligned to the size
+  // of a target word); this only matters when OFFSET is not zero.
+  // 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.
+  // 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 offset, off_t start, section_size_type size, bool aligned,
@@ -170,7 +177,7 @@ class File_read
   // interface, and it would be nice to have something more automatic.
   void
   clear_uncached_views()
-  { this->clear_views(false); }
+  { this->clear_views(CLEAR_VIEWS_ARCHIVE); }
 
   // A struct used to do a multiple read.
   struct Read_multiple_entry
@@ -214,6 +221,17 @@ class File_read
   get_mtime();
 
  private:
+  // Control for what views to clear.
+  enum Clear_views_mode
+  {
+    // Clear uncached views not used by an archive.
+    CLEAR_VIEWS_NORMAL,
+    // Clear all uncached views (including in an archive).
+    CLEAR_VIEWS_ARCHIVE,
+    // Clear all views (i.e., we're destroying the file).
+    CLEAR_VIEWS_ALL
+  };
+
   // This class may not be copied.
   File_read(const File_read&);
   File_read& operator=(const File_read&);
@@ -238,7 +256,7 @@ class File_read
     {
       // Data owned by File object - nothing done in destructor.
       DATA_NOT_OWNED,
-      // Data alocated with new[] and owned by this object - should
+      // Data allocated with new[] and owned by this object - should
       // use delete[].
       DATA_ALLOCATED_ARRAY,
       // Data mmapped and owned by this object - should munmap.
@@ -303,6 +321,12 @@ class File_read
     accessed() const
     { return this->accessed_; }
 
+    // Returns TRUE if this view contains permanent data -- e.g., data that
+    // was supplied by the owner of the File object.
+    bool
+    is_permanent_view() const
+    { return this->data_ownership_ == DATA_NOT_OWNED; }
+
    private:
     View(const View&);
     View& operator=(const View&);
@@ -366,7 +390,7 @@ class File_read
 
   // Clear the file views.
   void
-  clear_views(bool);
+  clear_views(Clear_views_mode);
 
   // The size of a file page for buffering data.
   static const off_t page_size = 8192;
@@ -382,13 +406,7 @@ class File_read
   { return (file_size + (page_size - 1)) & ~ (page_size - 1); }
 
   // The maximum number of entries we will pass to ::readv.
-#ifdef HAVE_READV
   static const size_t max_readv_entries = 128;
-#else
-  // On targets that don't have readv set the max to 1 so readv is not
-  // used.
-  static const size_t max_readv_entries = 1;
-#endif
 
   // Use readv to read data.
   void
@@ -476,6 +494,9 @@ class Input_file
       is_in_sysroot_(false), format_(FORMAT_NONE)
   { }
 
+  // Create an input file given just a filename.
+  Input_file(const char* name);
+
   // Create an input file with the contents already provided.  This is
   // only used for testing.  With this path, don't call the open
   // method.
@@ -498,7 +519,7 @@ class Input_file
   // restarted to find the next file with a matching name by
   // incrementing the result and calling this again.
   bool
-  open(const Dirsearch&, const Task*, int *pindex);
+  open(const Dirsearch&, const Task*, int* pindex);
 
   // Return the name given by the user.  For -lc this will return "c".
   const char*
@@ -548,6 +569,20 @@ class Input_file
   format() const
   { return this->format_; }
 
+  // Try to find a file in the extra search dirs.  Returns true on success.
+  static bool
+  try_extra_search_path(int* pindex,
+			const Input_file_argument* input_argument,
+			std::string filename, std::string* found_name,
+			std::string* namep);
+
+  // Find the actual file.
+  static bool
+  find_file(const Dirsearch& dirpath, int* pindex,
+	    const Input_file_argument* input_argument,
+	    bool* is_in_sysroot,
+	    std::string* found_name, std::string* namep);
+
  private:
   Input_file(const Input_file&);
   Input_file& operator=(const Input_file&);