[PATCH] D16638: [CUDA] Added device-side std::{malloc/free}

[Artem Belevich via cfe-commits]

tra updated this revision to Diff 46729.
tra added a comment.

Added few more device-side system calls and related wrapper functions.
Added nothrow attributes on malloc/free.


http://reviews.llvm.org/D16638

Files:
  lib/Headers/__clang_cuda_runtime_wrapper.h

Index: lib/Headers/__clang_cuda_runtime_wrapper.h
===================================================================
--- lib/Headers/__clang_cuda_runtime_wrapper.h
+++ lib/Headers/__clang_cuda_runtime_wrapper.h
@@ -80,17 +80,15 @@
 // definitions from .hpp files.
 #define __DEVICE_FUNCTIONS_H__
 #define __MATH_FUNCTIONS_H__
+#define __COMMON_FUNCTIONS_H__
 
 #undef __CUDACC__
 #define __CUDABE__
 // Disables definitions of device-side runtime support stubs in
 // cuda_device_runtime_api.h
-#define __CUDADEVRT_INTERNAL__
 #include "host_config.h"
 #include "host_defines.h"
 #include "driver_types.h"
-#include "common_functions.h"
-#undef __CUDADEVRT_INTERNAL__
 
 #undef __CUDABE__
 #define __CUDACC__
@@ -211,13 +209,38 @@
 static __device__ __attribute__((used)) int __nvvm_reflect_anchor() {
   return __nvvm_reflect("NONE");
 }
-
-// The nvptx vprintf syscall.  This doesn't actually need to be declared, but we
-// declare it so that if someone else declares it with a different signature,
-// we'll throw an error.
-extern "C" __device__ int vprintf(const char*, const char*);
 #endif
 
+// Device-side CUDA system calls.
+// http://docs.nvidia.com/cuda/ptx-writers-guide-to-interoperability/index.html#system-calls
+
+extern "C" {
+__device__ int vprintf(const char*, const char*);
+__device__ void free(void *) __attribute((nothrow));
+__device__ void *malloc(size_t) __attribute((nothrow)) __attribute__((malloc));
+__device__ void __assertfail(const char *message, const char *file,
+                             unsigned line, const char *function,
+                             size_t charSize) __attribute__((noreturn));
+// Wrapper over __assertfail needed for standard assert() macro on
+// linux to work.
+__device__ static inline void __assert_fail(const char *message,
+                                            const char *file, unsigned line,
+                                            const char *function) {
+  __assertfail(message, file, line, function, sizeof(char));
+}
+// Clang will convert printf into vprintf, but we still need
+// device-side declaration for it.
+__device__ int printf(const char *, ...);
+}
+
+// We also need device-side std::malloc and std::free
+namespace std {
+__device__ static inline void free(void *__ptr) { ::free(__ptr); }
+__device__ static inline void *malloc(size_t __size) {
+  return ::malloc(__size);
+}
+}
+
 #include <__clang_cuda_cmath.h>
 
 #endif // __CUDA__


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