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-rw-r--r--src/sim/SConscript1
-rw-r--r--src/sim/root.cc24
-rw-r--r--src/sim/serialize.cc118
-rw-r--r--src/sim/serialize.hh26
4 files changed, 131 insertions, 38 deletions
diff --git a/src/sim/SConscript b/src/sim/SConscript
index 0b3a35915..204bfca3b 100644
--- a/src/sim/SConscript
+++ b/src/sim/SConscript
@@ -42,6 +42,7 @@ SimObject('SubSystem.py')
Source('arguments.cc')
Source('async.cc')
Source('core.cc')
+Source('tags.cc')
Source('cxx_config.cc')
Source('cxx_manager.cc')
Source('cxx_config_ini.cc')
diff --git a/src/sim/root.cc b/src/sim/root.cc
index 1d58c3bbe..7647ca5b7 100644
--- a/src/sim/root.cc
+++ b/src/sim/root.cc
@@ -132,8 +132,6 @@ Root::loadState(CheckpointIn &cp)
void
Root::serialize(CheckpointOut &cp) const
{
- uint64_t cpt_ver = gem5CheckpointVersion;
- SERIALIZE_SCALAR(cpt_ver);
SERIALIZE_SCALAR(FullSystem);
std::string isa = THE_ISA_STR;
SERIALIZE_SCALAR(isa);
@@ -141,27 +139,7 @@ Root::serialize(CheckpointOut &cp) const
void
Root::unserialize(CheckpointIn &cp)
-{
- uint64_t cpt_ver = 0;
- UNSERIALIZE_OPT_SCALAR(cpt_ver);
- if (cpt_ver < gem5CheckpointVersion) {
- warn("**********************************************************\n");
- warn("!!!! Checkpoint ver %#x is older than current ver %#x !!!!\n",
- cpt_ver, gem5CheckpointVersion);
- warn("You might experience some issues when restoring and should run "
- "the checkpoint upgrader (util/cpt_upgrader.py) on your "
- "checkpoint\n");
- warn("**********************************************************\n");
- } else if (cpt_ver > gem5CheckpointVersion) {
- warn("**********************************************************\n");
- warn("!!!! Checkpoint ver %#x is newer than current ver %#x !!!!\n",
- cpt_ver, gem5CheckpointVersion);
- warn("Running a new checkpoint with an older version of gem5 is not "
- "supported. While it might work, you may experience incorrect "
- "behavior or crashes.\n");
- warn("**********************************************************\n");
- }
-}
+{}
bool FullSystem;
diff --git a/src/sim/serialize.cc b/src/sim/serialize.cc
index 3127d9a04..f9a945b95 100644
--- a/src/sim/serialize.cc
+++ b/src/sim/serialize.cc
@@ -212,6 +212,24 @@ arrayParamOut(CheckpointOut &os, const string &name, const list<T> &param)
template <class T>
void
+arrayParamOut(CheckpointOut &os, const string &name, const set<T> &param)
+{
+ typename set<T>::const_iterator it = param.begin();
+
+ os << name << "=";
+ if (param.size() > 0)
+ showParam(os, *it);
+ it++;
+ while (it != param.end()) {
+ os << " ";
+ showParam(os, *it);
+ it++;
+ }
+ os << "\n";
+}
+
+template <class T>
+void
paramIn(CheckpointIn &cp, const string &name, T &param)
{
const string &section(Serializable::currentSection());
@@ -223,12 +241,13 @@ paramIn(CheckpointIn &cp, const string &name, T &param)
template <class T>
bool
-optParamIn(CheckpointIn &cp, const string &name, T &param)
+optParamIn(CheckpointIn &cp, const string &name, T &param, bool warn)
{
const string &section(Serializable::currentSection());
string str;
if (!cp.find(section, name, str) || !parseParam(str, param)) {
- warn("optional parameter %s:%s not present\n", section, name);
+ if (warn)
+ warn("optional parameter %s:%s not present\n", section, name);
return false;
} else {
return true;
@@ -367,6 +386,36 @@ arrayParamIn(CheckpointIn &cp, const string &name, list<T> &param)
}
}
+template <class T>
+void
+arrayParamIn(CheckpointIn &cp, const string &name, set<T> &param)
+{
+ const string &section(Serializable::currentSection());
+ string str;
+ if (!cp.find(section, name, str)) {
+ fatal("Can't unserialize '%s:%s'\n", section, name);
+ }
+ param.clear();
+
+ vector<string> tokens;
+ tokenize(tokens, str, ' ');
+
+ for (vector<string>::size_type i = 0; i < tokens.size(); i++) {
+ T scalar_value;
+ if (!parseParam(tokens[i], scalar_value)) {
+ string err("could not parse \"");
+
+ err += str;
+ err += "\"";
+
+ fatal(err);
+ }
+
+ // assign parsed value to vector
+ param.insert(scalar_value);
+ }
+}
+
void
objParamIn(CheckpointIn &cp, const string &name, SimObject * &param)
@@ -384,7 +433,8 @@ objParamIn(CheckpointIn &cp, const string &name, SimObject * &param)
template void \
paramIn(CheckpointIn &cp, const string &name, type & param); \
template bool \
- optParamIn(CheckpointIn &cp, const string &name, type & param); \
+ optParamIn(CheckpointIn &cp, const string &name, type & param, \
+ bool warn); \
template void \
arrayParamOut(CheckpointOut &os, const string &name, \
type const *param, unsigned size); \
@@ -421,6 +471,11 @@ INSTANTIATE_PARAM_TEMPLATES(double)
INSTANTIATE_PARAM_TEMPLATES(string)
INSTANTIATE_PARAM_TEMPLATES(Pixel)
+// set is only used with strings and furthermore doesn't agree with Pixel
+template void
+arrayParamOut(CheckpointOut &, const string &, const set<string> &);
+template void
+arrayParamIn(CheckpointIn &, const string &, set<string> &);
/////////////////////////////
@@ -441,16 +496,73 @@ class Globals : public Serializable
/// The one and only instance of the Globals class.
Globals globals;
+/// The version tags for this build of the simulator, to be stored in the
+/// Globals section during serialization and compared upon unserialization.
+extern std::set<std::string> version_tags;
+
void
Globals::serialize(CheckpointOut &cp) const
{
paramOut(cp, "curTick", curTick());
+ SERIALIZE_CONTAINER(version_tags);
}
void
Globals::unserialize(CheckpointIn &cp)
{
paramIn(cp, "curTick", unserializedCurTick);
+
+ const std::string &section(Serializable::currentSection());
+ std::string str;
+ if (!cp.find(section, "version_tags", str)) {
+ warn("**********************************************************\n");
+ warn("!!!! Checkpoint uses an old versioning scheme. !!!!\n");
+ warn("Run the checkpoint upgrader (util/cpt_upgrader.py) on your "
+ "checkpoint\n");
+ warn("**********************************************************\n");
+ return;
+ }
+
+ std::set<std::string> cpt_tags;
+ arrayParamIn(cp, "version_tags", cpt_tags); // UNSERIALIZE_CONTAINER
+
+ bool err = false;
+ for (const auto& t : version_tags) {
+ if (cpt_tags.find(t) == cpt_tags.end()) {
+ // checkpoint is missing tag that this binary has
+ if (!err) {
+ warn("*****************************************************\n");
+ warn("!!!! Checkpoint is missing the following version tags:\n");
+ err = true;
+ }
+ warn(" %s\n", t);
+ }
+ }
+ if (err) {
+ warn("You might experience some issues when restoring and should run "
+ "the checkpoint upgrader (util/cpt_upgrader.py) on your "
+ "checkpoint\n");
+ warn("**********************************************************\n");
+ }
+
+ err = false;
+ for (const auto& t : cpt_tags) {
+ if (version_tags.find(t) == version_tags.end()) {
+ // gem5 binary is missing tag that this checkpoint has
+ if (!err) {
+ warn("*****************************************************\n");
+ warn("!!!! gem5 is missing the following version tags:\n");
+ err = true;
+ }
+ warn(" %s\n", t);
+ }
+ }
+ if (err) {
+ warn("Running a checkpoint with incompatible version tags is not "
+ "supported. While it might work, you may experience incorrect "
+ "behavior or crashes.\n");
+ warn("**********************************************************\n");
+ }
}
Serializable::Serializable()
diff --git a/src/sim/serialize.hh b/src/sim/serialize.hh
index 561cd5508..9a1170a9e 100644
--- a/src/sim/serialize.hh
+++ b/src/sim/serialize.hh
@@ -55,6 +55,7 @@
#include <list>
#include <map>
#include <stack>
+#include <set>
#include <vector>
#include "base/bitunion.hh"
@@ -70,15 +71,6 @@ class EventQueue;
typedef std::ostream CheckpointOut;
-/** The current version of the checkpoint format.
- * This should be incremented by 1 and only 1 for every new version, where a new
- * version is defined as a checkpoint created before this version won't work on
- * the current version until the checkpoint format is updated. Adding a new
- * SimObject shouldn't cause the version number to increase, only changes to
- * existing objects such as serializing/unserializing more state, changing sizes
- * of serialized arrays, etc. */
-static const uint64_t gem5CheckpointVersion = 0x000000000000000f;
-
template <class T>
void paramOut(CheckpointOut &cp, const std::string &name, const T &param);
@@ -100,13 +92,15 @@ void paramIn(CheckpointIn &cp, const std::string &name,
}
template <class T>
-bool optParamIn(CheckpointIn &cp, const std::string &name, T &param);
+bool optParamIn(CheckpointIn &cp, const std::string &name, T &param,
+ bool warn = true);
template <typename DataType, typename BitUnion>
bool optParamIn(CheckpointIn &cp, const std::string &name,
- BitfieldBackend::BitUnionOperators<DataType, BitUnion> &p)
+ BitfieldBackend::BitUnionOperators<DataType, BitUnion> &p,
+ bool warn = true)
{
- return optParamIn(cp, name, p.__data);
+ return optParamIn(cp, name, p.__data, warn);
}
template <class T>
@@ -122,6 +116,10 @@ void arrayParamOut(CheckpointOut &cp, const std::string &name,
const std::list<T> &param);
template <class T>
+void arrayParamOut(CheckpointOut &cp, const std::string &name,
+ const std::set<T> &param);
+
+template <class T>
void arrayParamIn(CheckpointIn &cp, const std::string &name,
T *param, unsigned size);
@@ -133,6 +131,10 @@ template <class T>
void arrayParamIn(CheckpointIn &cp, const std::string &name,
std::list<T> &param);
+template <class T>
+void arrayParamIn(CheckpointIn &cp, const std::string &name,
+ std::set<T> &param);
+
void
objParamIn(CheckpointIn &cp, const std::string &name, SimObject * &param);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 20:02:07 +0000