Set break point in C++ code of the symbol using gdb under Linux:
Build mxnet with following values:
DEBUG=1 CUDA=0 #to make sure convolution-inl.h will be used CUDNN=0 #to make sure convolution-inl.h will be used
run python under gdb: gdb --args python debug_conv.py
in gdb set break point on particular line of the code and run execution:
(gdb) break src/operator/convolution-inl.h:120
(gdb) run
Breakpoint 1, mxnet::op::ConvolutionOp<mshadow::cpu, float>::Forward (this=0x12219d0, ctx=..., in_data=std::vector of length 3, capacity 4 = {...}, req=std::vector of length 1, capacity 1 = {...}, out_data=std::vector of length 1, capacity 1 = {...},
aux_args=std::vector of length 0, capacity 0) at src/operator/./convolution-inl.h:121
121 data.shape_[1] / param_.num_group * param_.kernel[0] * param_.kernel[1]);
(gdb) list
116 }
117 Tensor<xpu, 4, DType> data = in_data[conv::kData].get<xpu, 4, DType>(s);
118 Shape<3> wmat_shape =
119 Shape3(param_.num_group,
120 param_.num_filter / param_.num_group,
121 data.shape_[1] / param_.num_group * param_.kernel[0] * param_.kernel[1]);
122 Tensor<xpu, 3, DType> wmat =
123 in_data[conv::kWeight].get_with_shape<xpu, 3, DType>(wmat_shape, s);
124 Tensor<xpu, 4, DType> out = out_data[conv::kOut].get<xpu, 4, DType>(s);
125 #if defined(__CUDACC__)