Add executable symbol info for the wavefront size

The wavefront size is currently only exposed as an agent level
attribute. This is not correctyl, because while the agent has a default
wave front size that is usually correct, it can easily be overridden via
options like -mwavefrontsize64 on various ISAs. The wavefrontsize
attribute is actually more of a calling convention that is consistent
within a callgraph. Because the root of each call graph is a kernel in
this architecture, we need to be able to query this on a per-kernel
basis. This information is already avialable in the kernel descriptor
packet, but it wasn't exported.

This patch adds HSA_CODE_SYMBOL_INFO_KERNEL_WAVEFRONT_SIZE as a new
option to query on the executable symbol.

Change-Id: I744815c89cc9d4c82f25479bdd48ae1f32e859ff

runtime/hsa-runtime/loader/executable.hpp

@@ -144,6 +144,7 @@ public:
                const bool &_is_dynamic_callstack,
                const uint32_t &_size,
                const uint32_t &_alignment,
+               const uint32_t &_wavefront_size,
                const uint64_t &_address = 0)
     : SymbolImpl(_is_loaded,
                  HSA_SYMBOL_KIND_KERNEL,
@@ -159,7 +160,8 @@ public:
     , private_segment_size(_private_segment_size)
     , is_dynamic_callstack(_is_dynamic_callstack)
     , size(_size)
-    , alignment(_alignment) {}
+    , alignment(_alignment)
+    , wavefront_size(_wavefront_size) {}
 
   ~KernelSymbol() {}
 
@@ -173,6 +175,7 @@ public:
   bool is_dynamic_callstack;
   uint32_t size;
   uint32_t alignment;
+  uint32_t wavefront_size;
   amd_runtime_loader_debug_info_t debug_info;
 
 private: