Clean up/standardize handling of various output files.

No more non-intuitive behavior shifts depending on whether
outputDirectory is set (at the expense of backwards compatibility).
outputDirectory is now always valid, defaults to ".".

dev/etherdump.cc:
    Use makeOutputStream() to create output file.
    New behavior: actually complain if dump file can't
    be opened, instead of quietly ignoring the problem.
dev/etherdump.hh:
dev/simconsole.cc:
dev/simconsole.hh:
    Use makeOutputStream() to create output file.
sim/builder.cc:
sim/builder.hh:
sim/main.cc:
    builderStream() is now *configStream.
sim/serialize.cc:
    outputDirectory is now always valid, no need to check.
sim/universe.cc:
    Clean up/standardize handling of various output files.
    No more non-intuitive behavior shifts depending on whether
    outputDirectory is set (at the expense of backwards compatibility).
    outputDirectory is now always valid, defaults to ".".
    New function makeOutputStream() does "the right thing" to
    associate a stream with a filename.

--HG--
extra : convert_revision : a03c58c547221b3906e0d6f55e4a569843f2d646

1 files changed, 52 insertions, 26 deletions

diff --git a/sim/universe.cc b/sim/universe.cc
index 79e32098c..ffff52104 100644
--- a/sim/universe.cc
+++ b/sim/universe.cc
@@ -51,12 +51,10 @@ double __ticksPerPS;
 
 string outputDirectory;
 ostream *outputStream;
+ostream *configStream;
 
 class UniverseParamContext : public ParamContext
 {
-  private:
-    ofstream outputFile;
-
   public:
     UniverseParamContext(const string &is) : ParamContext(is) {}
     void checkParams();
@@ -68,9 +66,14 @@ Param<Tick> universe_freq(&universe, "frequency", "tick frequency",
                           200000000);
 
 Param<string> universe_output_dir(&universe, "output_dir",
-                                  "directory to output data to");
+                                  "directory to output data to",
+                                  ".");
 Param<string> universe_output_file(&universe, "output_file",
-                                   "file to dump simulator output to");
+                                   "file to dump simulator output to",
+                                   "cout");
+Param<string> universe_config_output_file(&universe, "config_output_file",
+                                          "file to dump simulator config to",
+                                          "m5config.out");
 
 void
 UniverseParamContext::checkParams()
@@ -97,26 +100,49 @@ UniverseParamContext::checkParams()
         }
     }
 
-    string filename;
-    if (universe_output_file.isValid()) {
-        string f = universe_output_file;
-        if (f != "stdout" && f != "cout" && f != "stderr" && f != "cerr")
-            filename = outputDirectory + f;
-        else
-            filename = f;
-    } else {
-        if (outputDirectory.empty())
-            filename = "stdout";
-        else
-            filename = outputDirectory + "output.txt";
-    }
+    outputStream = makeOutputStream(universe_output_file);
+    configStream = universe_config_output_file.isValid()
+        ? makeOutputStream(universe_config_output_file)
+        : outputStream;
+}
 
-    if (filename == "stdout" || filename == "cout")
-        outputStream = &cout;
-    else if (filename == "stderr" || filename == "cerr")
-        outputStream = &cerr;
-    else {
-        outputFile.open(filename.c_str(), ios::trunc);
-        outputStream = &outputFile;
-    }
+
+std::ostream *
+makeOutputStream(std::string &name)
+{
+    if (name == "cerr" || name == "stderr")
+        return &std::cerr;
+
+    if (name == "cout" || name == "stdout")
+        return &std::cout;
+
+    string path = (name[0] != '/') ? outputDirectory + name : name;
+
+    // have to dynamically allocate a stream since we're going to
+    // return it... though the caller can't easily free it since it
+    // may be cerr or cout.  need GC!
+    ofstream *s = new ofstream(path.c_str(), ios::trunc);
+
+    if (!s->is_open())
+        fatal("Cannot open file %s", path);
+
+    return s;
 }
+
+
+void
+closeOutputStream(std::ostream *os)
+{
+    // can't close cerr or cout
+    if (os == &std::cerr || os == &std::cout)
+        return;
+
+    // can only close ofstreams, not generic ostreams, so try to
+    // downcast and close only if the downcast succeeds
+    std::ofstream *ofs = dynamic_cast<std::ofstream *>(os);
+    if (ofs)
+        ofs->close();
+}
+
+
+