X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Ftestplug.c;h=2181d7a13bc474b7a676697f636cff1c75578758;hb=c3614cffc85be28c07ff5320fe5554e6717ee87c;hp=3be1ed4142d435c2089b045426fb37bd06b0c5b7;hpb=69ee6ab254ad1fd822840f9fd2c1907e13620467;p=deliverable%2Fbinutils-gdb.git

diff --git a/ld/testplug.c b/ld/testplug.c
index 3be1ed4142..2181d7a13b 100644
--- a/ld/testplug.c
+++ b/ld/testplug.c
@@ -1,5 +1,5 @@
 /* Test plugin for the GNU linker.
-   Copyright 2010 Free Software Foundation, Inc.
+   Copyright (C) 2010-2019 Free Software Foundation, Inc.
 
    This file is part of the GNU Binutils.
 
@@ -24,6 +24,8 @@
 /* For ARRAY_SIZE macro only - we don't link the library itself.  */
 #include "libiberty.h"
 
+#include <ctype.h> /* For isdigit.  */
+
 extern enum ld_plugin_status onload (struct ld_plugin_tv *tv);
 static enum ld_plugin_status onclaim_file (const struct ld_plugin_input_file *file,
 				int *claimed);
@@ -87,6 +89,7 @@ static const tag_name_t tag_names[] =
   ADDENTRY(LDPT_ADD_INPUT_FILE),
   ADDENTRY(LDPT_MESSAGE),
   ADDENTRY(LDPT_GET_INPUT_FILE),
+  ADDENTRY(LDPT_GET_VIEW),
   ADDENTRY(LDPT_RELEASE_INPUT_FILE),
   ADDENTRY(LDPT_ADD_INPUT_LIBRARY),
   ADDENTRY(LDPT_OUTPUT_NAME),
@@ -104,6 +107,7 @@ static ld_plugin_get_symbols tv_get_symbols_v2 = 0;
 static ld_plugin_add_input_file tv_add_input_file = 0;
 static ld_plugin_message tv_message = 0;
 static ld_plugin_get_input_file tv_get_input_file = 0;
+static ld_plugin_get_view tv_get_view = 0;
 static ld_plugin_release_input_file tv_release_input_file = 0;
 static ld_plugin_add_input_library tv_add_input_library = 0;
 static ld_plugin_set_extra_library_path tv_set_extra_library_path = 0;
@@ -137,6 +141,10 @@ static add_file_t *addfiles_list = NULL;
 /* We keep a tail pointer for easy linking on the end.  */
 static add_file_t **addfiles_tail_chain_ptr = &addfiles_list;
 
+/* Number of bytes read in claim file before deciding if the file can be
+   claimed.  */
+static int bytes_to_read_before_claim = 0;
+
 /* Add a new claimfile on the end of the chain.  */
 static enum ld_plugin_status
 record_claim_file (const char *file)
@@ -157,6 +165,25 @@ record_claim_file (const char *file)
   return LDPS_OK;
 }
 
+/* How many bytes to read before claiming (or not) an input file.  */
+static enum ld_plugin_status
+record_read_length (const char *length)
+{
+  const char *tmp;
+
+  tmp = length;
+  while (*tmp != '\0' && isdigit (*tmp))
+    ++tmp;
+  if (*tmp != '\0' || *length == '\0')
+    {
+      fprintf (stderr, "APB: Bad length string: %s\n", tmp);
+      return LDPS_ERR;
+    }
+
+  bytes_to_read_before_claim = atoi (length);
+  return LDPS_OK;
+}
+
 /* Add a new addfile on the end of the chain.  */
 static enum ld_plugin_status
 record_add_file (const char *file, addfile_enum_t type)
@@ -168,7 +195,7 @@ record_add_file (const char *file, addfile_enum_t type)
     return LDPS_ERR;
   newfile->next = NULL;
   newfile->name = file;
-  newfile->type = type;;
+  newfile->type = type;
   /* Chain it on the end of the list.  */
   *addfiles_tail_chain_ptr = newfile;
   addfiles_tail_chain_ptr = &newfile->next;
@@ -323,6 +350,8 @@ parse_option (const char *opt)
     return set_register_hook (opt + 10, FALSE);
   else if (!strncmp ("claim:", opt, 6))
     return record_claim_file (opt + 6);
+  else if (!strncmp ("read:", opt, 5))
+    return record_read_length (opt + 5);
   else if (!strncmp ("sym:", opt, 4))
     return record_claimed_file_symbol (opt + 4);
   else if (!strncmp ("add:", opt, 4))
@@ -367,6 +396,7 @@ dump_tv_tag (size_t n, struct ld_plugin_tv *tv)
       case LDPT_ADD_INPUT_FILE:
       case LDPT_MESSAGE:
       case LDPT_GET_INPUT_FILE:
+      case LDPT_GET_VIEW:
       case LDPT_RELEASE_INPUT_FILE:
       case LDPT_ADD_INPUT_LIBRARY:
       case LDPT_SET_EXTRA_LIBRARY_PATH:
@@ -433,6 +463,9 @@ parse_tv_tag (struct ld_plugin_tv *tv)
       case LDPT_GET_INPUT_FILE:
 	SETVAR(tv_get_input_file);
 	break;
+      case LDPT_GET_VIEW:
+	SETVAR(tv_get_view);
+	break;
       case LDPT_RELEASE_INPUT_FILE:
 	SETVAR(tv_release_input_file);
 	break;
@@ -521,6 +554,20 @@ onload (struct ld_plugin_tv *tv)
 static enum ld_plugin_status
 onclaim_file (const struct ld_plugin_input_file *file, int *claimed)
 {
+  /* Possible read of some bytes out of the input file into a buffer.  This
+     simulates a plugin that reads some file content in order to decide if
+     the file should be claimed or not.  */
+  if (bytes_to_read_before_claim > 0)
+    {
+      char *buffer = malloc (bytes_to_read_before_claim);
+
+      if (buffer == NULL)
+        return LDPS_ERR;
+      if (read (file->fd, buffer, bytes_to_read_before_claim) < 0)
+        return LDPS_ERR;
+      free (buffer);
+    }
+
   /* Let's see if we want to claim this file.  */
   claim_file_t *claimfile = claimfiles_list;
   while (claimfile)