[llvm-commits] CVS: llvm/lib/System/Darwin/Memory.cpp Process.cpp Path.cpp

[Reid Spencer]

Changes in directory llvm/lib/System/Darwin:

Memory.cpp added (r1.1)
Process.cpp added (r1.1)
Path.cpp updated: 1.2 -> 1.3
---
Log message:

Provide initial implementations of Memory and Process concepts for various
platforms.
Implement GetLLVMSuffix function for the Path concept.


---
Diffs of the changes:  (+89 -0)

Index: llvm/lib/System/Darwin/Memory.cpp
diff -c /dev/null llvm/lib/System/Darwin/Memory.cpp:1.1
*** /dev/null	Fri Sep 10 23:59:40 2004
--- llvm/lib/System/Darwin/Memory.cpp	Fri Sep 10 23:59:30 2004
***************
*** 0 ****
--- 1,62 ----
+ //===- Darwin/Memory.cpp - Darwin Memory Implementation ---------*- C++ -*-===//
+ // 
+ //                     The LLVM Compiler Infrastructure
+ //
+ // This file was developed by Reid Spencer and is distributed under the 
+ // University of Illinois Open Source License. See LICENSE.TXT for details.
+ // 
+ //===----------------------------------------------------------------------===//
+ //
+ // This file provides the Darwin specific implementation of various Memory
+ // management utilities
+ //
+ //===----------------------------------------------------------------------===//
+ 
+ // Include the generic unix implementation
+ #include "../Unix/Memory.cpp"
+ #include "llvm/System/Process.h"
+ #include <sys/mman.h>
+ 
+ namespace llvm {
+ using namespace sys;
+ 
+ //===----------------------------------------------------------------------===//
+ //=== WARNING: Implementation here must contain only Darwin specific code 
+ //===          and must not be generic UNIX code (see ../Unix/Memory.cpp)
+ //===----------------------------------------------------------------------===//
+ 
+ /// AllocateRWXMemory - Allocate a slab of memory with read/write/execute
+ /// permissions.  This is typically used for JIT applications where we want
+ /// to emit code to the memory then jump to it.  Getting this type of memory
+ /// is very OS specific.
+ ///
+ void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
+   if (NumBytes == 0) return 0;
+ 
+   static const long pageSize = Process::GetPageSize();
+   unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
+ 
+   void *pa = mmap(0, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
+                   MAP_PRIVATE|MAP_ANON, -1, 0);
+   if (pa == MAP_FAILED) {
+     char msg[MAXPATHLEN];
+     strerror_r(errno, msg, MAXPATHLEN-1);
+     throw std::string("Can't allocate RWX Memory: ") + msg;
+   }
+   M.Address = pa;
+   M.AllocSize = NumPages*pageSize;
+   return pa;
+ }
+ 
+ void Memory::ReleaseRWX(Memory& M) {
+   if (M.Address == 0 || M.AllocSize == 0) return;
+   if (0 != munmap(M.Address, M.AllocSize)) {
+     char msg[MAXPATHLEN];
+     strerror_r(errno, msg, MAXPATHLEN-1);
+     throw std::string("Can't release RWX Memory: ") + msg;
+   }
+ }
+ 
+ }
+ 
+ // vim: sw=2 smartindent smarttab tw=80 autoindent expandtab


Index: llvm/lib/System/Darwin/Process.cpp
diff -c /dev/null llvm/lib/System/Darwin/Process.cpp:1.1
*** /dev/null	Fri Sep 10 23:59:42 2004
--- llvm/lib/System/Darwin/Process.cpp	Fri Sep 10 23:59:30 2004
***************
*** 0 ****
--- 1,22 ----
+ //===- Darwin/Process.cpp - Darwin Process Implementation ----- -*- C++ -*-===//
+ // 
+ //                     The LLVM Compiler Infrastructure
+ //
+ // This file was developed by Reid Spencer and is distributed under the 
+ // University of Illinois Open Source License. See LICENSE.TXT for details.
+ // 
+ //===----------------------------------------------------------------------===//
+ //
+ // This file provides the Darwin specific implementation of the Process class.
+ //
+ //===----------------------------------------------------------------------===//
+ 
+ // Include the generic Unix implementation
+ #include "../Unix/Process.cpp"
+ 
+ //===----------------------------------------------------------------------===//
+ //=== WARNING: Implementation here must contain only Darwin specific code 
+ //===          and must not be generic UNIX code (see ../Unix/Process.cpp)
+ //===----------------------------------------------------------------------===//
+ 
+ // vim: sw=2 smartindent smarttab tw=80 autoindent expandtab


Index: llvm/lib/System/Darwin/Path.cpp
diff -u llvm/lib/System/Darwin/Path.cpp:1.2 llvm/lib/System/Darwin/Path.cpp:1.3
--- llvm/lib/System/Darwin/Path.cpp:1.2	Mon Aug 30 16:46:55 2004
+++ llvm/lib/System/Darwin/Path.cpp	Fri Sep 10 23:59:30 2004
@@ -43,6 +43,11 @@
   return result;
 }
 
+std::string
+Path::GetDLLSuffix() {
+  return "dyld";
+}
+
 }
 
 // vim: sw=2 smartindent smarttab tw=80 autoindent expandtab