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, 2 insertions, 1 deletions

diff --git a/src/dev/terminal.hh b/src/dev/terminal.hh
index 82246b2c1..41c2a9e26 100644
--- a/src/dev/terminal.hh
+++ b/src/dev/terminal.hh
@@ -46,6 +46,7 @@
 #include "params/Terminal.hh"
 #include "sim/sim_object.hh"
 
+class OutputStream;
 class TerminalListener;
 
 class Terminal : public SimObject
@@ -111,7 +112,7 @@ class Terminal : public SimObject
   protected:
     CircleBuf<char> txbuf;
     CircleBuf<char> rxbuf;
-    std::ostream *outfile;
+    OutputStream *outfile;
 #if TRACING_ON == 1
     CircleBuf<char> linebuf;
 #endif