Gabe Black has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/30295 )
Change subject: sim: Add some helpers to catch and reporting using unbound
ports.
..
sim: Add some helpers to catch and reporting using unbound ports.
If a port is unbound, trying to call its peer will likely cause a
segfault. Rather than check if a port is bound every time you go to use
it, we can instead bind to a default peer which just throws an exception
back to the caller. The caller can catch the exception and report the
error.
This change adds a common new class to throw as the exception, and also
a small utility function which reports the error and dies.
Change-Id: Ia58a2030922c73e2fd7d139822bce38d9b0f2171
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/30295
Reviewed-by: Nikos Nikoleris
Maintainer: Gabe Black
Tested-by: kokoro
---
M src/sim/port.cc
M src/sim/port.hh
2 files changed, 13 insertions(+), 0 deletions(-)
Approvals:
Nikos Nikoleris: Looks good to me, approved
Gabe Black: Looks good to me, approved
kokoro: Regressions pass
diff --git a/src/sim/port.cc b/src/sim/port.cc
index 7ca8db6..9131f84 100644
--- a/src/sim/port.cc
+++ b/src/sim/port.cc
@@ -45,7 +45,16 @@
#include "sim/port.hh"
+#include "base/logging.hh"
+
Port::Port(const std::string& _name, PortID _id) :
portName(_name), id(_id), _peer(nullptr), _connected(false)
{}
Port::~Port() {}
+
+
+void
+Port::reportUnbound() const
+{
+fatal("%s: Unconnected port!", name());
+}
diff --git a/src/sim/port.hh b/src/sim/port.hh
index 251624c..85472d0 100644
--- a/src/sim/port.hh
+++ b/src/sim/port.hh
@@ -63,6 +63,10 @@
protected:
+class UnboundPortException {};
+
+[[noreturn]] void reportUnbound() const;
+
/**
* A numeric identifier to distinguish ports in a vector, and set
* to InvalidPortID in case this port is not part of a vector.
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: Ia58a2030922c73e2fd7d139822bce38d9b0f2171
Gerrit-Change-Number: 30295
Gerrit-PatchSet: 2
Gerrit-Owner: Gabe Black
Gerrit-Reviewer: Brandon Potter
Gerrit-Reviewer: Gabe Black
Gerrit-Reviewer: Nikos Nikoleris
Gerrit-Reviewer: kokoro
Gerrit-MessageType: merged
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