GDB 7.6.50

gdb/testsuite/lib/cache.exp

Index: gdb/testsuite/lib/cache.exp
diff --git a/gdb/testsuite/lib/cache.exp b/gdb/testsuite/lib/cache.exp
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+# Copyright 2012, 2013 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# The in-memory cache.
+array set gdb_data_cache {}
+
+# A helper for gdb_caching_proc that handles the caching.
+
+proc gdb_do_cache {name} {
+    global gdb_data_cache objdir
+    global GDB_PARALLEL
+
+    # See if some other process wrote the cache file.  Cache value per
+    # "board" to handle runs with multiple options
+    # (e.g. unix/{-m32,-64}) correctly.  We use "file join" here
+    # because we later use this in a real filename.
+    set cache_name [file join [target_info name] $name]
+
+    if {[info exists gdb_data_cache($cache_name)]} {
+	verbose "$name: returning '$gdb_data_cache($cache_name)' from cache" 2
+	return $gdb_data_cache($cache_name)
+    }
+
+    if {[info exists GDB_PARALLEL]} {
+	set cache_filename [file join $objdir cache $cache_name]
+	if {[file exists $cache_filename]} {
+	    set fd [open $cache_filename]
+	    set gdb_data_cache($cache_name) [read -nonewline $fd]
+	    close $fd
+	    verbose "$name: returning '$gdb_data_cache($cache_name)' from file cache" 2
+	    return $gdb_data_cache($cache_name)
+	}
+    }
+
+    set real_name gdb_real__$name
+    set gdb_data_cache($cache_name) [uplevel 1 $real_name]
+
+    if {[info exists GDB_PARALLEL]} {
+	verbose "$name: returning '$gdb_data_cache($cache_name)' and writing file" 2
+	file mkdir [file dirname $cache_filename]
+	# Make sure to write the results file atomically.
+	set fd [open $cache_filename.[pid] w]
+	puts $fd $gdb_data_cache($cache_name)
+	close $fd
+	file rename -force -- $cache_filename.[pid] $cache_filename
+    }
+    return $gdb_data_cache($cache_name)
+}
+
+# Define a new proc named NAME that takes no arguments.  BODY is the
+# body of the proc.  The proc will evaluate BODY and cache the
+# results, both in memory and, if GDB_PARALLEL is defined, in the
+# filesystem for use across invocations of dejagnu.
+
+proc gdb_caching_proc {name body} {
+    # Define the underlying proc that we'll call.
+    set real_name gdb_real__$name
+    proc $real_name {} $body
+
+    # Define the advertised proc.
+    proc $name {} [list gdb_do_cache $name]
+}