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Rather than print the errno, print the result of strerror so the user doesn't have to look up what each error code does. Don't duplicate descriptors needlessly which have been returned by pipe(). Use panic_if instead of if () panic. Check each call to a standard library function instead of calling multiple and then only knowing that one of them failed (but not which one). Close the far side of our pipes for both the gem5 process, and the process that will become diod. Remove some stray #undef-s which undefine macros that were never defined. Don't try to force the descriptors going to diod to be particular numbers. Slightly reduce nesting in the if which checks the results of fork. Drop unnecessary \n-s in calls to panic, inform, etc. Minor spacing related style fixes. Use nullptr instead of NULL. Change-Id: I48d93778a1e139ef624876a0b316486aac774d7f Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/43083 Reviewed-by: Yu-hsin Wang <yuhsingw@google.com> Maintainer: Gabe Black <gabe.black@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
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/about, and for more information about building the simulator and getting started please see http://www.gem5.org/documentation and http://www.gem5.org/documentation/learning_gem5/introduction. 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/documentation/general_docs/building 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 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/documentation/general_docs/building for more details and options. 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. If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.