Fix Normalize_TRT plugin segfault

Signed-off-by: Kevin Chen <kevinch@nvidia.com>

Author: samurdhikaru

plugin/normalizePlugin/normalizePlugin.cpp

@@ -35,7 +35,7 @@ const char* NORMALIZE_PLUGIN_NAME{"Normalize_TRT"};
 PluginFieldCollection NormalizePluginCreator::mFC{};
 std::vector<PluginField> NormalizePluginCreator::mPluginAttributes;
 
-Normalize::Normalize(const Weights* weights, int nbWeights, bool acrossSpatial, bool channelShared, float eps)
+Normalize::Normalize(Weights const* weights, int nbWeights, bool acrossSpatial, bool channelShared, float eps)
     : acrossSpatial(acrossSpatial)
     , channelShared(channelShared)
     , eps(eps)
@@ -44,11 +44,13 @@ Normalize::Normalize(const Weights* weights, int nbWeights, bool acrossSpatial,
     PLUGIN_VALIDATE(nbWeights == 1);
     PLUGIN_VALIDATE(weights[0].count >= 1);
     mWeights = copyToDevice(weights[0].values, weights[0].count);
+    mScalarScale = static_cast<float const*>(weights[0].values)[0];
 }
 
 Normalize::Normalize(
-    const Weights* weights, int nbWeights, bool acrossSpatial, bool channelShared, float eps, int C, int H, int W)
-    : acrossSpatial(acrossSpatial)
+    Weights const* weights, int nbWeights, float scalarScale, bool acrossSpatial, bool channelShared, float eps, int C, int H, int W)
+    : mScalarScale(scalarScale)
+    , acrossSpatial(acrossSpatial)
     , channelShared(channelShared)
     , eps(eps)
     , C(C)
@@ -74,6 +76,7 @@ Normalize::Normalize(const void* buffer, size_t length)
 
     mNbWeights = read<int>(d);
     int count = read<int>(d);
+    std::memcpy(&mScalarScale, d, sizeof(float));
     mWeights = deserializeToDevice(d, count);
     PLUGIN_VALIDATE(d == a + length);
 }
@@ -111,8 +114,19 @@ int Normalize::enqueue(
 {
     const void* inputData = inputs[0];
     void* outputData = outputs[0];
-    pluginStatus_t status = normalizeInference(stream, mCublas, acrossSpatial, channelShared, batchSize, C, H, W, eps,
-        static_cast<const float*>(mWeights.values), inputData, outputData, workspace);
+
+    pluginStatus_t status;
+
+    if(acrossSpatial && channelShared) // Since cublasPointerMode_t is CUBLAS_POINTER_MODE_HOST, scale should be on the host
+    {
+        status = normalizeInference(stream, mCublas, acrossSpatial, channelShared, batchSize, C, H, W, eps,
+        &mScalarScale, inputData, outputData, workspace);
+    }
+    else // No risk of device pointers being passed to cublas as alpha or beta
+    {
+        status = normalizeInference(stream, mCublas, acrossSpatial, channelShared, batchSize, C, H, W, eps,
+            static_cast<float const*>(mWeights.values), inputData, outputData, workspace);
+    }
 
     return status;
 }
@@ -254,7 +268,7 @@ IPluginV2Ext* Normalize::clone() const noexcept
     try
     {
         // Create a new instance
-        IPluginV2Ext* plugin = new Normalize(&mWeights, mNbWeights, acrossSpatial, channelShared, eps, C, H, W);
+        IPluginV2Ext* plugin = new Normalize(&mWeights, mNbWeights, mScalarScale, acrossSpatial, channelShared, eps, C, H, W);
 
         // Set the namespace
         plugin->setPluginNamespace(mPluginNamespace.c_str());

plugin/normalizePlugin/normalizePlugin.h

@@ -31,10 +31,10 @@ namespace plugin
 class Normalize : public IPluginV2Ext
 {
 public:
-    Normalize(const Weights* weights, int nbWeights, bool acrossSpatial, bool channelShared, float eps);
+    Normalize(Weights const* weights, int nbWeights, bool acrossSpatial, bool channelShared, float eps);
 
     Normalize(
-        const Weights* weights, int nbWeights, bool acrossSpatial, bool channelShared, float eps, int C, int H, int W);
+        Weights const* weights, int nbWeights, float scalarScale, bool acrossSpatial, bool channelShared, float eps, int C, int H, int W);
 
     Normalize(const void* buffer, size_t length);
 
@@ -93,8 +93,9 @@ class Normalize : public IPluginV2Ext
 
     cublasHandle_t mCublas;
 
-    Weights mWeights{};
+    Weights mWeights{}; // mWeights.values is on the device
     int mNbWeights{};
+    float mScalarScale{}; // keep track of scale on the host (for when channelShared is true)
     bool acrossSpatial{};
     bool channelShared{};
     float eps{};