base: Add support for changing output directories

This changeset adds support for changing the simulator output
directory. This can be useful when the simulation goes through several
stages (e.g., a warming phase, a simulation phase, and a verification
phase) since it allows the output from each stage to be located in a
different directory. Relocation is done by calling core.setOutputDir()
from Python or simout.setOutputDirectory() from C++.

This change affects several parts of the design of the gem5's output
subsystem. First, files returned by an OutputDirectory instance (e.g.,
simout) are of the type OutputStream instead of a std::ostream. This
allows us to do some more book keeping and control re-opening of files
when the output directory is changed. Second, new subdirectories are
OutputDirectory instances, which should be used to create files in
that sub-directory.

Signed-off-by: Andreas Sandberg <andreas@sandberg.pp.se>
[sascha.bischoff@arm.com: Rebased patches onto a newer gem5 version]
Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/src/base/stats/text.cc b/src/base/stats/text.cc
index efe43c602..05ce33cdf 100644
--- a/src/base/stats/text.cc
+++ b/src/base/stats/text.cc
@@ -740,11 +740,7 @@ initText(const string &filename, bool desc)
     static bool connected = false;
 
     if (!connected) {
-        ostream *os = simout.find(filename);
-        if (!os)
-            os = simout.create(filename);
-
-        text.open(*os);
+        text.open(*simout.findOrCreate(filename)->stream());
         text.descriptions = desc;
         connected = true;
     }