9c57d5b5a6
The PollEvent class dynamically installs a SIGIO and SIGALRM handler when a file handler is registered. Most signal handlers currently get registered in the initSignals() function. This changeset moves the SIGIO/SIGALRM handlers to initSignals() to live with the other signal handlers. The original code installs SIGIO and SIGALRM with the SA_RESTART option to prevent syscalls from returning EINTR. This changeset consistently uses this flag for all signal handlers to ensure that other signals that trigger asynchronous behavior (e.g., statistics dumping) do not cause undesirable EINTR returns.
347 lines
9.2 KiB
C++
347 lines
9.2 KiB
C++
/*
|
|
* Copyright (c) 2012 ARM Limited
|
|
* All rights reserved
|
|
*
|
|
* The license below extends only to copyright in the software and shall
|
|
* not be construed as granting a license to any other intellectual
|
|
* property including but not limited to intellectual property relating
|
|
* to a hardware implementation of the functionality of the software
|
|
* licensed hereunder. You may use the software subject to the license
|
|
* terms below provided that you ensure that this notice is replicated
|
|
* unmodified and in its entirety in all distributions of the software,
|
|
* modified or unmodified, in source code or in binary form.
|
|
*
|
|
* Copyright (c) 2000-2005 The Regents of The University of Michigan
|
|
* Copyright (c) 2008 The Hewlett-Packard Development Company
|
|
* 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.
|
|
*
|
|
* Authors: Nathan Binkert
|
|
*/
|
|
|
|
#include <Python.h>
|
|
|
|
#include <marshal.h>
|
|
#include <zlib.h>
|
|
|
|
#include <csignal>
|
|
#include <iostream>
|
|
#include <list>
|
|
#include <string>
|
|
|
|
#include "base/cprintf.hh"
|
|
#include "base/misc.hh"
|
|
#include "base/types.hh"
|
|
#include "config/have_protobuf.hh"
|
|
#include "sim/async.hh"
|
|
#include "sim/core.hh"
|
|
#include "sim/init.hh"
|
|
|
|
#if HAVE_PROTOBUF
|
|
#include <google/protobuf/stubs/common.h>
|
|
#endif
|
|
|
|
using namespace std;
|
|
|
|
/// Stats signal handler.
|
|
void
|
|
dumpStatsHandler(int sigtype)
|
|
{
|
|
async_event = true;
|
|
async_statdump = true;
|
|
}
|
|
|
|
void
|
|
dumprstStatsHandler(int sigtype)
|
|
{
|
|
async_event = true;
|
|
async_statdump = true;
|
|
async_statreset = true;
|
|
}
|
|
|
|
/// Exit signal handler.
|
|
void
|
|
exitNowHandler(int sigtype)
|
|
{
|
|
async_event = true;
|
|
async_exit = true;
|
|
}
|
|
|
|
/// Abort signal handler.
|
|
void
|
|
abortHandler(int sigtype)
|
|
{
|
|
ccprintf(cerr, "Program aborted at cycle %d\n", curTick());
|
|
}
|
|
|
|
// Handle SIGIO
|
|
static void
|
|
ioHandler(int sigtype)
|
|
{
|
|
async_event = true;
|
|
async_io = true;
|
|
}
|
|
|
|
// Handle SIGALRM
|
|
static void
|
|
alrmHandler(int sigtype)
|
|
{
|
|
async_event = true;
|
|
async_alarm = true;
|
|
alarm(1);
|
|
}
|
|
|
|
static void
|
|
installSignalHandler(int signal, void (*handler)(int sigtype))
|
|
{
|
|
struct sigaction sa;
|
|
|
|
memset(&sa, 0, sizeof(sa));
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_handler = handler;
|
|
sa.sa_flags = SA_RESTART;
|
|
|
|
if (sigaction(signal, &sa, NULL) == -1)
|
|
panic("Failed to setup handler for signal %i\n", signal);
|
|
}
|
|
|
|
/*
|
|
* M5 can do several special things when various signals are sent.
|
|
* None are mandatory.
|
|
*/
|
|
void
|
|
initSignals()
|
|
{
|
|
// Floating point exceptions may happen on misspeculated paths, so
|
|
// ignore them
|
|
signal(SIGFPE, SIG_IGN);
|
|
|
|
// We use SIGTRAP sometimes for debugging
|
|
signal(SIGTRAP, SIG_IGN);
|
|
|
|
// Dump intermediate stats
|
|
installSignalHandler(SIGUSR1, dumpStatsHandler);
|
|
|
|
// Dump intermediate stats and reset them
|
|
installSignalHandler(SIGUSR2, dumprstStatsHandler);
|
|
|
|
// Exit cleanly on Interrupt (Ctrl-C)
|
|
installSignalHandler(SIGINT, exitNowHandler);
|
|
|
|
// Print out cycle number on abort
|
|
installSignalHandler(SIGABRT, abortHandler);
|
|
|
|
// Install a SIGIO handler to handle asynchronous file IO. See the
|
|
// PollQueue class.
|
|
installSignalHandler(SIGIO, ioHandler);
|
|
|
|
// Setup an alarm handler that triggers every second. This
|
|
// triggers a PollQueue service just like a SIGIO. It is
|
|
// /probably/ used to work around a bug in the poll queue (likely
|
|
// a race between setting up a asynchronous IO and data becoming
|
|
// available), but its use isn't documented anywhere.
|
|
// TODO: Find out why this is needed and fix the original bug.
|
|
installSignalHandler(SIGALRM, alrmHandler);
|
|
alarm(1);
|
|
}
|
|
|
|
// The python library is totally messed up with respect to constness,
|
|
// so make a simple macro to make life a little easier
|
|
#define PyCC(x) (const_cast<char *>(x))
|
|
|
|
EmbeddedPython *EmbeddedPython::importer = NULL;
|
|
PyObject *EmbeddedPython::importerModule = NULL;
|
|
EmbeddedPython::EmbeddedPython(const char *filename, const char *abspath,
|
|
const char *modpath, const unsigned char *code, int zlen, int len)
|
|
: filename(filename), abspath(abspath), modpath(modpath), code(code),
|
|
zlen(zlen), len(len)
|
|
{
|
|
// if we've added the importer keep track of it because we need it
|
|
// to bootstrap.
|
|
if (string(modpath) == string("importer"))
|
|
importer = this;
|
|
else
|
|
getList().push_back(this);
|
|
}
|
|
|
|
list<EmbeddedPython *> &
|
|
EmbeddedPython::getList()
|
|
{
|
|
static list<EmbeddedPython *> the_list;
|
|
return the_list;
|
|
}
|
|
|
|
/*
|
|
* Uncompress and unmarshal the code object stored in the
|
|
* EmbeddedPython
|
|
*/
|
|
PyObject *
|
|
EmbeddedPython::getCode() const
|
|
{
|
|
Bytef marshalled[len];
|
|
uLongf unzlen = len;
|
|
int ret = uncompress(marshalled, &unzlen, (const Bytef *)code, zlen);
|
|
if (ret != Z_OK)
|
|
panic("Could not uncompress code: %s\n", zError(ret));
|
|
assert(unzlen == (uLongf)len);
|
|
|
|
return PyMarshal_ReadObjectFromString((char *)marshalled, len);
|
|
}
|
|
|
|
bool
|
|
EmbeddedPython::addModule() const
|
|
{
|
|
PyObject *code = getCode();
|
|
PyObject *result = PyObject_CallMethod(importerModule, PyCC("add_module"),
|
|
PyCC("sssO"), filename, abspath, modpath, code);
|
|
if (!result) {
|
|
PyErr_Print();
|
|
return false;
|
|
}
|
|
|
|
Py_DECREF(result);
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Load and initialize all of the python parts of M5, including Swig
|
|
* and the embedded module importer.
|
|
*/
|
|
int
|
|
EmbeddedPython::initAll()
|
|
{
|
|
// Load the importer module
|
|
PyObject *code = importer->getCode();
|
|
importerModule = PyImport_ExecCodeModule(PyCC("importer"), code);
|
|
if (!importerModule) {
|
|
PyErr_Print();
|
|
return 1;
|
|
}
|
|
|
|
// Load the rest of the embedded python files into the embedded
|
|
// python importer
|
|
list<EmbeddedPython *>::iterator i = getList().begin();
|
|
list<EmbeddedPython *>::iterator end = getList().end();
|
|
for (; i != end; ++i)
|
|
if (!(*i)->addModule())
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
EmbeddedSwig::EmbeddedSwig(void (*init_func)())
|
|
: initFunc(init_func)
|
|
{
|
|
getList().push_back(this);
|
|
}
|
|
|
|
list<EmbeddedSwig *> &
|
|
EmbeddedSwig::getList()
|
|
{
|
|
static list<EmbeddedSwig *> the_list;
|
|
return the_list;
|
|
}
|
|
|
|
void
|
|
EmbeddedSwig::initAll()
|
|
{
|
|
// initialize SWIG modules. initSwig() is autogenerated and calls
|
|
// all of the individual swig initialization functions.
|
|
list<EmbeddedSwig *>::iterator i = getList().begin();
|
|
list<EmbeddedSwig *>::iterator end = getList().end();
|
|
for (; i != end; ++i)
|
|
(*i)->initFunc();
|
|
}
|
|
|
|
int
|
|
initM5Python()
|
|
{
|
|
EmbeddedSwig::initAll();
|
|
return EmbeddedPython::initAll();
|
|
}
|
|
|
|
/*
|
|
* Make the commands array weak so that they can be overridden (used
|
|
* by unit tests to specify a different python main function.
|
|
*/
|
|
const char * __attribute__((weak)) m5MainCommands[] = {
|
|
"import m5",
|
|
"m5.main()",
|
|
0 // sentinel is required
|
|
};
|
|
|
|
/*
|
|
* Start up the M5 simulator. This mostly vectors into the python
|
|
* main function.
|
|
*/
|
|
int
|
|
m5Main(int argc, char **argv)
|
|
{
|
|
#if HAVE_PROTOBUF
|
|
// Verify that the version of the protobuf library that we linked
|
|
// against is compatible with the version of the headers we
|
|
// compiled against.
|
|
GOOGLE_PROTOBUF_VERIFY_VERSION;
|
|
#endif
|
|
|
|
PySys_SetArgv(argc, argv);
|
|
|
|
// We have to set things up in the special __main__ module
|
|
PyObject *module = PyImport_AddModule(PyCC("__main__"));
|
|
if (module == NULL)
|
|
panic("Could not import __main__");
|
|
PyObject *dict = PyModule_GetDict(module);
|
|
|
|
// import the main m5 module
|
|
PyObject *result;
|
|
const char **command = m5MainCommands;
|
|
|
|
// evaluate each command in the m5MainCommands array (basically a
|
|
// bunch of python statements.
|
|
while (*command) {
|
|
result = PyRun_String(*command, Py_file_input, dict, dict);
|
|
if (!result) {
|
|
PyErr_Print();
|
|
return 1;
|
|
}
|
|
Py_DECREF(result);
|
|
|
|
command++;
|
|
}
|
|
|
|
#if HAVE_PROTOBUF
|
|
google::protobuf::ShutdownProtobufLibrary();
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
PyMODINIT_FUNC
|
|
initm5(void)
|
|
{
|
|
initM5Python();
|
|
PyImport_ImportModule(PyCC("m5"));
|
|
}
|