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2017-06-06scons: Try to handle problems with gcc, lto and partial linking.Gabe Black
gcc has had a lot of problems with incremental linking and partial linking at the same time. Basically, the partial link assumes that it's the only link that's going to happen, and it converts weak external symbols into regular external symbols. Then when the real final link happens, those symbols are duplicated and the link fails. Versions of gcc 6 and greater add an option called -flinker-output which lets you tell the linker to do an incremental link. Unfortunately, other bugs make that fail, and so gcc 6 doesn't work either. Hopefully version 7 works better. A --force-lto option was added so that, when only one of lto and partial linking is available, you can switch from having partial linking to having lto. Change-Id: I5e293f5cfb07a14343dc74030d99cb161fb8bbbe Reviewed-on: https://gem5-review.googlesource.com/3680 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-06-04scons: Add use_tuntap to export listJason Lowe-Power
Fixes broken build after c58537c. Change-Id: I686ffaaad4fe558b6e51c89c9b26121318c2b721 Signed-off-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-on: https://gem5-review.googlesource.com/3647 Reviewed-by: Gabe Black <gabeblack@google.com>
2017-06-03dev: Add a version of EtherTap which uses the tap driver.Gabe Black
The object is called EtherTap (as opposed to EtherTapStub, what the former EtherTap was renamed to), and its existance is gated on the linux/if_tun.h header file existing. That's probably overly strict, but it will hopefully be minimally likely to break the build for other systems. Change-Id: Ie03507fadf0d843a4d4d52f283c44a416c6f2a74 Reviewed-on: https://gem5-review.googlesource.com/3646 Reviewed-by: Nathan Binkert <nate@binkert.org> Maintainer: Nathan Binkert <nate@binkert.org>
2017-05-22scons: Enable explicitly building something with no variant.Gabe Black
The SConstruct currently expects all explicit targets to be under a variant directory like ARM or X86 which tells it what settings to use, etc. There are things which scons knows how to build however, which do not live under a variant directory, specifically everything under ext. This change makes scons not look for a variant directory when it encounters a target which is built by something in ext. This enables things like explicitly building the systemc libraries, for example. Change-Id: I8982a96fe49e3cb970ec78e11cea08703990c686 Reviewed-on: https://gem5-review.googlesource.com/3460 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Christian Menard <christian.menard@tu-dresden.de> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-05-10scons: Use the generalized switching headers on the GPU ISA.Gabe Black
Now that the switching header implementation has been generalized, there's no need to have two nearly identical implementations for the two different groups of headers. Change-Id: Ie7c24fcddbc672ac5ca2d69bfc35696f42c55580 Reviewed-on: https://gem5-review.googlesource.com/2984 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-05-10scons: arch: Generalize the switching header code.Gabe Black
Factor out the ISA ness of the switching header generating function. Also turn it into a SCons builder which builds a single header, and a wrapping method which uses the builder on a group of header files which all target the same subdirectory. Change-Id: I87705f97b6ebd9baebd4ebcfea19cc1218a64ad0 Reviewed-on: https://gem5-review.googlesource.com/2983 Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-05-09scons: Get rid of the all_isa_deps variable.Gabe Black
This value can be computed more directly and more locally near where it's used. Change-Id: Ib5f45015494a6c8033ce0ac4b8931688f37492c8 Reviewed-on: https://gem5-review.googlesource.com/2982 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-05-08scons: Get rid of the PHONY_BASE construction variable.Gabe Black
The value of that variable can be computed more directly and more locally to where it's consumed. Change-Id: I5ca1f732a34e22d4dae2aeb6ee7fc8adebe1caa0 Reviewed-on: https://gem5-review.googlesource.com/2981 Maintainer: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-05-03scons: Fix the compiler flag used for partial linking.Gabe Black
It seems that g++ can generally handle the -r flag for generating a relocatable object file, but ld can't always handle the --relocatable flag. Change-Id: I15f32e469590a814131d4e992b392a7ad6c52b83 Reviewed-on: https://gem5-review.googlesource.com/3001 Reviewed-by: Andreas Hansson <andreas.hansson@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-05-02scons: Remove SWIG supportAndreas Sandberg
Remove remaining SWIG support from the build infrastructure. Change-Id: I7549cd0f952ca3a51481918eefef3a29f03af359 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Andreas Hansson <andreas.hansson@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2920 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
2017-05-02python: Use PyBind11 instead of SWIG for Python wrappersAndreas Sandberg
Use the PyBind11 wrapping infrastructure instead of SWIG to generate wrappers for functionality that needs to be exported to Python. This has several benefits: * PyBind11 can be redistributed with gem5, which means that we have full control of the version used. This avoid a large number of hard-to-debug SWIG issues we have seen in the past. * PyBind11 doesn't rely on a custom C++ parser, instead it relies on wrappers being explicitly declared in C++. The leads to slightly more boiler-plate code in manually created wrappers, but doesn't doesn't increase the overall code size. A big benefit is that this avoids strange compilation errors when SWIG doesn't understand modern language features. * Unlike SWIG, there is no risk that the wrapper code incorporates incorrect type casts (this has happened on numerous occasions in the past) since these will result in compile-time errors. As a part of this change, the mechanism to define exported methods has been redesigned slightly. New methods can be exported either by declaring them in the SimObject declaration and decorating them with the cxxMethod decorator or by adding an instance of PyBindMethod/PyBindProperty to the cxx_exports class variable. The decorator has the added benefit of making it possible to add a docstring and naming the method's parameters. The new wrappers have the following known issues: * Global events can't be memory managed correctly. This was the case in SWIG as well. Change-Id: I88c5a95b6cf6c32fa9e1ad31dfc08b2e8199a763 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Andreas Hansson <andreas.hansson@arm.com> Reviewed-by: Andrew Bardsley <andrew.bardsley@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2231 Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-05-02ext: Add pybind rev f4b81b3Andreas Sandberg
Change-Id: I52e4fc9ebf2f59da57d8cf8f3e37cc79598c2f5f Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Andreas Hansson <andreas.hansson@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2229 Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr>
2017-05-01scons: Add builders for partially linked object files.Gabe Black
These intermediate object files can be used to perform a hierarchical link. Change-Id: I27634731734eebe6531ce6b0894abdd59ffdc5c9 Reviewed-on: https://gem5-review.googlesource.com/2944 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-04-28scons: Add a Transform() for when linking shared libraries.Gabe Black
Change-Id: I7ddba0cc7be559633328011c1c7e2282f509b78c Reviewed-on: https://gem5-review.googlesource.com/2943 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-04-28scons: Find ext build directories automatically.Gabe Black
The ext directories with SConscripts in them are easy to find automatically. Avoid boilerplate listing them out and SConscript()ing them manually. Change-Id: Ib723882aebc00e639eb8ec44904bb05ffa2c6b55 Reviewed-on: https://gem5-review.googlesource.com/2942 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-04-05scons: Fix hook installation error caused by stale cacheAndreas Sandberg
Due to the way SCons caches some file system state internally, it sometimes "remembers" that a file or directory didn't exist at some point. The git hook installation script sometimes needs to create a hooks directory in the repository. Due to the cached state of the hooks directory, the build system tries to create it twice. The second mkdir operation leads to an error since the directory already exists. Fix this issue by clearing the cached state of the hooks directory after creating it. Change-Id: I3f67f75c06ef928b439a0742f7619b7e92ed093b Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2660 Reviewed-by: Gabe Black <gabeblack@google.com>
2017-03-26scons: Collapse symlinks when installing git hooks.Gabe Black
When naively computing the relative path between the git hooks directory and a hook we want to install, that will generally start with a few ".." path components to work back out of the .git directory into the working directory.' If the hooks directory is actually a symlink, then following ".." directory entries won't get us back to where we came from, they'll take us to the actual parent directory of hooks. The relative path we computed would then try to go forward from this other directory using a path that would have worked in the working directory, hopefully going somewhere that doesn't exist, but potentially going to a totally unrelated file with the same relative path. To avoid this problem, we should expand any symlinks in both the hooks directory path, and the path to the hook script. That way, any ".." components will go where we'd expect them to, and the relative path will actually go from hooks to the script we expect. Change-Id: I64d51bc817351f89b1d60eceaf450cc0a4553415 Reviewed-on: https://gem5-review.googlesource.com/2542 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-03-26scons: Use a relative symlink for git hooks more selectively.Gabe Black
If the hooks directory is a symlink, then there are at least two possible scenarios to consider when installing a hook which is itself a symlink. The first is that hooks is a relative symlink, and so is likely intended to stay in place relative to .git and the git working directory. In that case, it's ok for the symlinks inside of hooks to be relative to the working directory too, since they should also stay in place relatively speaking. The second situation is that the symlink is absolute. In that case, moving the git working directory will move the hook relative to the hook directory, and any relative symlink will become broken. In that case, the hook symlink needs to be absolute. The same logic likely applies to the .git directory itself, although I haven't run into a situation in practice where the .git directory is actually a symlink. Change-Id: I047aa198094dd0fd5a841417d93b211ece02783f Reviewed-on: https://gem5-review.googlesource.com/2541 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-03-26scons: Detect and remove broken git hook symlinks.Gabe Black
When installing a git hook, it's possible for the hook to not "exist" if it's actually a symlink which points to a file that doesn't exist. Trying to create a new symlink in its place without first removing the old one causes a build failure in these cases. If the hook doesn't "exist" but is still a link, that means it's actually a broken link and should be deleted by the hook installation function before any new symlink is created. Change-Id: I59aa51feb5bd74ca33e51e89cde2ceabeb41bd76 Reviewed-on: https://gem5-review.googlesource.com/2540 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-03-24scons: Stop generating an a.out checking the "as" version.Gabe Black
Change-Id: I71d07fc64bdb3c6c3e93e2a1fd358cc899a70678 Reviewed-on: https://gem5-review.googlesource.com/2500 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-03-01scons: Automatically add a git commit message hookAndreas Sandberg
Gerrit requires that all commit messages have a Change-Id tag. This tag is added automatically by a commit message hook in Git. Include the default Gerrit commit message hook and add it automatically using scons to make life easier for everyone. Change-Id: I1270fbaaadf6ed151bddf14521a38e0c1a02d131 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2166 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com>
2017-02-09scons: make build better on FreeBSDBjoern A. Zeeb
Various changes we found needed to build gem5 successfully on FreeBSD. Reviewed at http://reviews.gem5.org/r/3378/ Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
2017-01-19ruby: guard usage of GPUCoalescer code in ProfilerTony Gutierrez
the GPUCoalescer code is used in the ruby profiler regardless of whether or not the coalescer code has been compiled, which can lead to link/run time errors. here we add #ifdefs to guard the usage of GPUCoalescer code. eventually we should refactor this code to use probe points.
2016-05-30scons: Bump minimum gcc version to 4.8Andreas Hansson
After reaching consensus on the mailing list, this patch officially makes gcc 4.8 the minimum. A few checks in the SConstruct are cleaned up as a result. This patch also adds "-fno-omit-frame-pointer" when using ASAN (which is part of the gcc/clang recommended flags).
2016-05-27scons: Enable override suggestions on gcc 5.0+Matteo Andreozzi
--- SConstruct | 4 ++++ 1 file changed, 4 insertions(+)
2016-05-09scons: Rewrite git style hook installerAndreas Sandberg
The SCons script currently assumes that .git is a proper directory with all git meta data. This isn't the case if the working directory was checked out using git worktrees. In such case .git is a file with meta data telling git where the repository data is stored. This changeset updates changes the SConstruct file to rely on git rev-parse to get the real git directory. Change-Id: I3d0475eabc12e868193797067a88e540a9b6e927 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
2016-04-28scons: emit correct message before installing git hookCurtis Dunham
Change-Id: Ied2e018a9a1b6db446edbaac871ac4efd795ec36 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
2016-04-18scons: Fix Python 2.6 compatibilityAndreas Sandberg
Don't use Python 2.7-style with statements in the SConstruct file.
2016-03-30scons: Automatically install the git style hookAndreas Sandberg
Add a check in the main SConscript that installs the git pre-commit hook in util/ if git is used. Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> [andreas.sandberg@arm.com: Cleanups suggested by Steve] Reviewed-by: Steve Reinhardt <steve.reinhardt@amd.com> --HG-- extra : rebase_source : 4b805cdd74bc5442a65abf8a62e3e341f352c04e
2016-03-30scons, style: Rename style.py to hgstyle.pyAndreas Sandberg
The Mercurial style checker extensions are currently stored in style.py. This is not ideal since they won't work with other version control systems. This changeset renames style.py to hgstyle.py and adds upgrade code to scons that automatically updates the hooks in hgrc. Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Nathanael Premillieu <nathananel.premillieu@arm.com> Reviewed-by: Steve Reinhardt <steve.reinhardt@amd.com> --HG-- rename : util/style.py => util/hgstyle.py extra : rebase_source : ee8107ef245901371b368b7c2046ecdd89e3ff4c
2016-02-17scons: Enable building with the gcc/clang Address SanitizerAndreas Hansson
Allow the user to easily build gem5 with the Address Sanitizer, part of both gcc and clang these days.
2016-01-19gpu-compute: AMD's baseline GPU modelTony Gutierrez
2016-01-11scons: Enable -Wextra by defaultAndreas Hansson
Make best use of the compiler, and enable -Wextra as well as -Wall. There are a few issues that had to be resolved, but they are all trivial.
2016-01-11ext: Replace gzstream with iostream3 from zlib to avoid LGPLAndreas Hansson
This patch replaces the gzstream zlib wrapper with the iostream3 wrapper provided as part of zlib contributions. The main reason for the switch is to avoid including LGPL in the default gem5 build. iostream3 is provided under a more permissive license: The code is provided "as is", with the permission to use, copy, modify, distribute and sell it for any purpose without fee.
2015-12-04sim: Add support for generating back traces on errorsAndreas Sandberg
Add functionality to generate a back trace if gem5 crashes (SIGABRT or SIGSEGV). The current implementation uses glibc's stack traversal support if available and stubs out the call to print_backtrace() otherwise.
2015-11-15sim: support for distcc pump server settingsJoe Gross
2015-07-07ext: Add the NoMali GPU no-simulation libraryAndreas Sandberg
Add revision 9adf9d6e2d889a483a92136c96eb8a434d360561 of NoMali-model from https://github.com/ARM-software/nomali-model. This library implements the register interface of the Mali T6xx/T7xx series GPUs, but doesn't do any rendering. It can be used to hide the effects of software rendering.
2015-07-03scons: remove dead leading underscore checkCurtis Dunham
e56c3d8 (2008) added it but 8e37348 (2010) removed its only use.
2015-07-03scons: Bump compiler requirement to gcc >= 4.7 and clang >= 3.1Andreas Hansson
This patch updates the compiler minimum requirement to gcc 4.7 and clang 3.1, thus allowing: 1. Explicit virtual overrides (no need for M5_ATTR_OVERRIDE) 2. Non-static data member initializers 3. Template aliases 4. Delegating constructors This patch also enables a transition from --std=c++0x to --std=c++11.
2015-06-09scons: Allow GNU assembler version strings with hyphenAndreas Hansson
Make scons a bit more forgiving when determining the GNU assembler version.
2015-06-01kvm, arm: Add support for aarch64Andreas Sandberg
This changeset adds support for aarch64 in kvm. The CPU module supports both checkpointing and online CPU model switching as long as no devices are simulated by the host kernel. It currently has the following limitations: * The system register based generic timer can only be simulated by the host kernel. Workaround: Use a memory mapped timer instead to simulate the timer in gem5. * Simulating devices (e.g., the generic timer) in the host kernel requires that the host kernel also simulates the GIC. * ID registers in the host and in gem5 must match for switching between simulated CPUs and KVM. This is particularly important for ID registers describing memory system capabilities (e.g., ASID size, physical address size). * Switching between a virtualized CPU and a simulated CPU is currently not supported if in-kernel device emulation is used. This could be worked around by adding support for switching to the gem5 (e.g., the KvmGic) side of the device models. A simpler workaround is to avoid in-kernel device models altogether.
2015-05-23build: Don't test for KVM xsave support on ARMAndreas Sandberg
The current build tests for KVM unconditionally check for xsave support. This obviously never works on ARM since xsave is x86-specific. This changeset refactors the build tests probing for KVM support and moves the xsave test to an x86-specific section of is_isa_kvm_compatible().
2015-03-02tests: Run regression timeout as foregroundAndreas Hansson
Allow the user to send signals such as Ctrl C to the gem5 runs. Note that this assumes coreutils >= 8.13, which aligns with Ubuntu 12.04 and RHE6.
2015-02-03scons: Avoid implicit command dependenciesAndreas Hansson
Work around a bug in scons that causes the param wrappers being compiled twice. The easiest way for us to do so is to tell scons to ignore implicit command dependencies.
2014-12-22scons: Make the USE_KVM variable available in C++.Gabe Black
We need it to determine whether we should expect KVM related parameters exist in the cirrus graphics device.
2014-12-02scons: Ensure dictionary iteration is sorted by keyAndreas Hansson
This patch adds sorting based on the SimObject name or parameter name for all situations where we iterate over dictionaries. This should ensure a deterministic and consistent order across the host systems and hopefully avoid regression results differing across python versions.
2014-10-16config: Add the ability to read a config file using C++ and PythonAndreas Hansson
This patch adds the ability to load in config.ini files generated from gem5 into another instance of gem5 built without Python configuration support. The intended use case is for configuring gem5 when it is a library embedded in another simulation system. A parallel config file reader is also provided purely in Python to demonstrate the approach taken and to provided similar functionality for as-yet-unknown use models. The Python configuration file reader can read both .ini and .json files. C++ configuration file reading: A command line option has been added for scons to enable C++ configuration file reading: --with-cxx-config There is an example in util/cxx_config that shows C++ configuration in action. util/cxx_config/README explains how to build the example. Configuration is achieved by the object CxxConfigManager. It handles reading object descriptions from a CxxConfigFileBase object which wraps a config file reader. The wrapper class CxxIniFile is provided which wraps an IniFile for reading .ini files. Reading .json files from C++ would be possible with a similar wrapper and a JSON parser. After reading object descriptions, CxxConfigManager creates SimObjectParam-derived objects from the classes in the (generated with this patch) directory build/ARCH/cxx_config CxxConfigManager can then build SimObjects from those SimObjectParams (in an order dictated by the SimObject-value parameters on other objects) and bind ports of the produced SimObjects. A minimal set of instantiate-replacing member functions are provided by CxxConfigManager and few of the member functions of SimObject (such as drain) are extended onto CxxConfigManager. Python configuration file reading (configs/example/read_config.py): A Python version of the reader is also supplied with a similar interface to CxxConfigFileBase (In Python: ConfigFile) to config file readers. The Python config file reading will handle both .ini and .json files. The object construction strategy is slightly different in Python from the C++ reader as you need to avoid objects prematurely becoming the children of other objects when setting parameters. Port binding also needs to be strictly in the same port-index order as the original instantiation.
2014-10-16scons: Add Undefined Behavior Sanitizer (UBSan) optionAndreas Hansson
This patch adds the Undefined Behavior Sanitizer (UBSan) for clang and gcc >= 4.9. Due to the performance impact, the usage is guarded by a command-line option.
2014-09-22scons: Add --without-tcmalloc build optionCurtis Dunham
Disabling tcmalloc is required for valgrind's memcheck to work properly; this option makes it easier to create such a build.
2014-10-16config: Add a --without-python option to build processAndrew Bardsley
Add the ability to build libgem5 without embedded Python or the ability to configure with Python. This is a prelude to a patch to allow config.ini files to be loaded into libgem5 using only C++ which would make embedding gem5 within other simulation systems easier. This adds a few registration interfaces to things which cross between Python and C++. Namely: stats dumping and SimObject resolving
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