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authorBrandon Potter <Brandon.Potter@amd.com>2017-03-01 14:29:00 -0600
committerBrandon Potter <Brandon.Potter@amd.com>2017-03-09 22:42:45 +0000
commit8b85f950e5a4f0f7ebf66f142356d8dcea7c9bcc (patch)
tree6c425c8e50ac1f40a9a8da619624f5c180de944e
parent198c515b970604df600c2b84ddfc51fa24ed9754 (diff)
downloadgem5-8b85f950e5a4f0f7ebf66f142356d8dcea7c9bcc.tar.xz
syscall-emul: Adds SE mode signal feature
This changeset adds a simple class definition and a member in the System object to track signals sent between processes. The implementation cannot support all signals that might be sent between processes, but it can support some of the simple use cases like SIGCHLD. Change-Id: Id5f95aa60e7f49da1c5b5596fbfa26e729453ac7 Reviewed-on: https://gem5-review.googlesource.com/2267 Reviewed-by: Michael LeBeane <Michael.Lebeane@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
-rw-r--r--src/sim/SConscript1
-rw-r--r--src/sim/se_signal.cc43
-rw-r--r--src/sim/se_signal.hh46
-rw-r--r--src/sim/system.hh5
4 files changed, 95 insertions, 0 deletions
diff --git a/src/sim/SConscript b/src/sim/SConscript
index c36b33b51..a3d5464e8 100644
--- a/src/sim/SConscript
+++ b/src/sim/SConscript
@@ -66,6 +66,7 @@ Source('stat_control.cc')
Source('stat_register.cc', skip_no_python=True)
Source('clock_domain.cc')
Source('voltage_domain.cc')
+Source('se_signal.cc')
Source('linear_solver.cc')
Source('system.cc')
Source('dvfs_handler.cc')
diff --git a/src/sim/se_signal.cc b/src/sim/se_signal.cc
new file mode 100644
index 000000000..f448c761e
--- /dev/null
+++ b/src/sim/se_signal.cc
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2017 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Brandon Potter
+ */
+
+#include "sim/se_signal.hh"
+
+BasicSignal::BasicSignal(Process *send, Process *receive, int signal_val)
+ : sender(send),
+ receiver(receive),
+ signalValue(signal_val)
+{
+}
+
+
+BasicSignal::~BasicSignal()
+{
+}
diff --git a/src/sim/se_signal.hh b/src/sim/se_signal.hh
new file mode 100644
index 000000000..e3241f5f9
--- /dev/null
+++ b/src/sim/se_signal.hh
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2017 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Brandon Potter
+ */
+
+#ifndef __SE_SIGNAL_HH__
+#define __SE_SIGNAL_HH__
+
+class Process;
+
+class BasicSignal {
+ public:
+ Process *sender;
+ Process *receiver;
+ int signalValue;
+
+ BasicSignal(Process *sender, Process *receiver, int signal_val);
+ ~BasicSignal();
+};
+
+#endif // __SE_SIGNAL_HH__
diff --git a/src/sim/system.hh b/src/sim/system.hh
index 3954b35c2..7584cebc9 100644
--- a/src/sim/system.hh
+++ b/src/sim/system.hh
@@ -61,6 +61,7 @@
#include "mem/port_proxy.hh"
#include "mem/physical.hh"
#include "params/System.hh"
+#include "sim/se_signal.hh"
/**
* To avoid linking errors with LTO, only include the header if we
@@ -556,6 +557,10 @@ class System : public MemObject
/** Process set to track which PIDs have already been allocated */
std::set<int> PIDs;
+ // By convention, all signals are owned by the receiving process. The
+ // receiver will delete the signal upon reception.
+ std::list<BasicSignal> signalList;
+
protected:
/**