Giacomo Travaglini 62d75e7105 tests: Always print stderr in gem5 Fixtures
At the moment is impossible when observing an upstream kokoro failure
to understand what went wrong.
This is because the only thing that gets printed is the exception
traceback and the command line generating it.

Most of the time it will be something like

Traceback (most recent call last):
  File
"/tmpfs/src/git/jenkins-gem5-prod/tests/../ext/testlib/runner.py", line
195, in setup
    fixture.setup(testitem)
  File "/tmpfs/src/git/jenkins-gem5-prod/tests/gem5/fixture.py", line
115, in setup
    self._setup(testitem)
  File "/tmpfs/src/git/jenkins-gem5-prod/tests/gem5/fixture.py", line
160, in _setup
    log_call(log.test_log, command)
  File
"/tmpfs/src/git/jenkins-gem5-prod/tests/../ext/testlib/helper.py", line
103, in log_call
    raise subprocess.CalledProcessError(retval, cmdstr)

With this patch we dump the stderr so that the fail reason is exposed
to the viewer.

Change-Id: Ic3d0fe75ec4d0543d95e9624dc5287afb4af3b8b
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23843
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
2019-12-23 08:52:59 +00:00
2019-12-06 10:15:24 +00:00
2019-12-06 10:15:24 +00:00
2017-03-01 11:58:37 +00:00

This is the gem5 simulator.

The main website can be found at http://www.gem5.org

A good starting point is http://www.gem5.org/Introduction, and for
more information about building the simulator and getting started
please see http://www.gem5.org/Documentation and
http://www.gem5.org/Tutorials.

To build gem5, you will need the following software: g++ or clang,
Python (gem5 links in the Python interpreter), SCons, SWIG, zlib, m4,
and lastly protobuf if you want trace capture and playback
support. Please see http://www.gem5.org/Dependencies for more details
concerning the minimum versions of the aforementioned tools.

Once you have all dependencies resolved, type 'scons
build/<ARCH>/gem5.opt' where ARCH is one of ALPHA, ARM, NULL, MIPS,
POWER, SPARC, or X86. This will build an optimized version of the gem5
binary (gem5.opt) for the the specified architecture. See
http://www.gem5.org/Build_System for more details and options.

With the simulator built, have a look at
http://www.gem5.org/Running_gem5 for more information on how to use
gem5.

The basic source release includes these subdirectories:
   - configs: example simulation configuration scripts
   - ext: less-common external packages needed to build gem5
   - src: source code of the gem5 simulator
   - system: source for some optional system software for simulated systems
   - tests: regression tests
   - util: useful utility programs and files

To run full-system simulations, you will need compiled system firmware
(console and PALcode for Alpha), kernel binaries and one or more disk
images. Please see the gem5 download page for these items at
http://www.gem5.org/Download

If you have questions, please send mail to gem5-users@gem5.org

Enjoy using gem5 and please share your modifications and extensions.
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