Dynamic Library abstraction. This makes the abstraction of a single dynamic

library (shared library/shared object) whose symbols can be looked up
dynamically. Used for plug-ins.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17940 91177308-0d34-0410-b5e6-96231b3b80d8

11 files changed, 408 insertions, 0 deletions

diff --git a/lib/System/AIX/DynamicLibrary.cpp b/lib/System/AIX/DynamicLibrary.cpp
new file mode 100644
index 0000000000..fa71f2a3d4
--- /dev/null
+++ b/lib/System/AIX/DynamicLibrary.cpp
@@ -0,0 +1,27 @@
+//===- AIX/DynamicLibrary.cpp - AIX Dynamic Library -------------*- 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 implements the AIX version of DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+// Include the generic unix implementation
+#include "../Unix/DynamicLibrary.cpp"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only AIX specific code 
+//===          and must not be generic UNIX code (see ../Unix/Memory.cpp)
+//===----------------------------------------------------------------------===//
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
diff --git a/lib/System/Cygwin/DynamicLibrary.cpp b/lib/System/Cygwin/DynamicLibrary.cpp
new file mode 100644
index 0000000000..68644880a5
--- /dev/null
+++ b/lib/System/Cygwin/DynamicLibrary.cpp
@@ -0,0 +1,27 @@
+//===- Cygwin/DynamicLibrary.cpp - Cygwin Dynamic Library -------*- 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 implements the Cygwin version of DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+// Include the generic unix implementation
+#include "../Unix/DynamicLibrary.cpp"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Cygwin specific code 
+//===          and must not be generic UNIX code (see ../Unix/Memory.cpp)
+//===----------------------------------------------------------------------===//
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
diff --git a/lib/System/Darwin/DynamicLibrary.cpp b/lib/System/Darwin/DynamicLibrary.cpp
new file mode 100644
index 0000000000..fec646047c
--- /dev/null
+++ b/lib/System/Darwin/DynamicLibrary.cpp
@@ -0,0 +1,27 @@
+//===- Darwin/DynamicLibrary.cpp - Darwin Dynamic Library -------*- 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 implements the Darwin version of DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+// Include the generic unix implementation
+#include "../Unix/DynamicLibrary.cpp"
+
+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)
+//===----------------------------------------------------------------------===//
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
diff --git a/lib/System/DynamicLibrary.cpp b/lib/System/DynamicLibrary.cpp
new file mode 100644
index 0000000000..ca7bee661a
--- /dev/null
+++ b/lib/System/DynamicLibrary.cpp
@@ -0,0 +1,78 @@
+//===-- DynamicLibrary.cpp - Runtime link/load libraries --------*- 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 header file implements the operating system DynamicLibrary concept.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/System/DynamicLibrary.h"
+#include "llvm/Config/dlfcn.h"
+#include <cassert>
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only TRULY operating system
+//===          independent code. 
+//===----------------------------------------------------------------------===//
+
+#ifdef HAVE_LTDL_H
+
+namespace llvm {
+
+using namespace sys;
+
+#ifdef HAVE_LT_DLOPEN
+
+DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
+  if (0 != lt_dlinit())
+    throw std::string(lt_dlerror());
+
+  handle = lt_dlopen(filename);
+
+  if (handle == 0)
+    handle = lt_dlopenext(filename);
+
+  if (handle == 0)
+    throw std::string("Can't open dynamic library:") + filename;
+}
+
+DynamicLibrary::~DynamicLibrary() {
+  if (handle)
+    lt_dlclose((lt_dlhandle)handle);
+
+  lt_dlexit();
+}
+
+void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
+  assert(handle != 0 && "Invalid DynamicLibrary handle");
+  return lt_dlsym((lt_dlhandle) handle,symbolName);
+}
+
+#else
+DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
+  assert(!"Have ltdl.h but not libltdl.a!");
+}
+
+DynamicLibrary::~DynamicLibrary() {
+  assert(!"Have ltdl.h but not libltdl.a!");
+}
+
+void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
+  assert(!"Have ltdl.h but not libltdl.a!");
+  return 0;
+}
+
+#endif // HAVE_DLOPEN
+
+} // namespace llvm
+
+#else // HAVE_LTDL_H
+
+#include "platform/DynamicLibrary.cpp"
+
+#endif
diff --git a/lib/System/FreeBSD/DynamicLibrary.cpp b/lib/System/FreeBSD/DynamicLibrary.cpp
new file mode 100644
index 0000000000..1eb6a1888c
--- /dev/null
+++ b/lib/System/FreeBSD/DynamicLibrary.cpp
@@ -0,0 +1,27 @@
+//===- FreeBSD/DynamicLibrary.cpp - FreeBSD Dynamic Library -----*- 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 implements the FreeBSD version of DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+// Include the generic unix implementation
+#include "../Unix/DynamicLibrary.cpp"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only FreeBSD specific code 
+//===          and must not be generic UNIX code (see ../Unix/Memory.cpp)
+//===----------------------------------------------------------------------===//
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
diff --git a/lib/System/Interix/DynamicLibrary.cpp b/lib/System/Interix/DynamicLibrary.cpp
new file mode 100644
index 0000000000..1c35bb441d
--- /dev/null
+++ b/lib/System/Interix/DynamicLibrary.cpp
@@ -0,0 +1,27 @@
+//===- Interix/DynamicLibrary.cpp - Interix Dynamic Library -----*- 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 implements the Interix version of DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+// Include the generic unix implementation
+#include "../Unix/DynamicLibrary.cpp"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Interix specific code 
+//===          and must not be generic UNIX code (see ../Unix/Memory.cpp)
+//===----------------------------------------------------------------------===//
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
diff --git a/lib/System/Linux/DynamicLibrary.cpp b/lib/System/Linux/DynamicLibrary.cpp
new file mode 100644
index 0000000000..2ab662f5f7
--- /dev/null
+++ b/lib/System/Linux/DynamicLibrary.cpp
@@ -0,0 +1,27 @@
+//===- Linux/DynamicLibrary.cpp - Linux Dynamic Library ---------*- 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 implements the Linux version of DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+// Include the generic unix implementation
+#include "../Unix/DynamicLibrary.cpp"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Linux specific code 
+//===          and must not be generic UNIX code (see ../Unix/Memory.cpp)
+//===----------------------------------------------------------------------===//
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
diff --git a/lib/System/SunOS/DynamicLibrary.cpp b/lib/System/SunOS/DynamicLibrary.cpp
new file mode 100644
index 0000000000..494320fba0
--- /dev/null
+++ b/lib/System/SunOS/DynamicLibrary.cpp
@@ -0,0 +1,27 @@
+//===- SunOS/DynamicLibrary.cpp - SunOS Dynamic Library ---------*- 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 implements the SunOS version of DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+// Include the generic unix implementation
+#include "../Unix/DynamicLibrary.cpp"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only SunOS specific code 
+//===          and must not be generic UNIX code (see ../Unix/Memory.cpp)
+//===----------------------------------------------------------------------===//
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
diff --git a/lib/System/Unix/DynamicLibrary.cpp b/lib/System/Unix/DynamicLibrary.cpp
new file mode 100644
index 0000000000..c513f51f95
--- /dev/null
+++ b/lib/System/Unix/DynamicLibrary.cpp
@@ -0,0 +1,47 @@
+//===- Unix/DynamicLibrary.cpp - Generic UNIX Dynamic Library ---*- 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 implements the generic UNIX variant of DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+#include "Unix.h"
+
+namespace llvm {
+using namespace sys;
+
+
+DynamicLibrary::DynamicLibrary(const char *filename) {
+#if defined (HAVE_DLOPEN)
+  if ((handle = dlopen (filename, RTLD_NOW | RTLD_GLOBAL)) == 0)
+    throw std::string( dlerror() );
+#else
+  assert (!"Dynamic object linking not implemented for this platform");
+#endif
+}
+
+DynamicLibrary::~DynamicLibrary() {
+  assert(handle != 0 && "Invalid DynamicLibrary handle");
+#if defined (HAVE_DLOPEN)
+  dlclose(handle);
+#else
+  assert (!"Dynamic object linking not implemented for this platform");
+#endif
+}
+
+void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
+  assert(handle != 0 && "Invalid DynamicLibrary handle");
+#if defined(HAVE_DLOPEN)
+    return dlsym (handle, symbolName);
+#else
+  assert (0 && "Dynamic symbol lookup not implemented for this platform");
+#endif
+}
+
+}
diff --git a/lib/System/Win32/DynamicLibrary.cpp b/lib/System/Win32/DynamicLibrary.cpp
new file mode 100644
index 0000000000..15730d43a0
--- /dev/null
+++ b/lib/System/Win32/DynamicLibrary.cpp
@@ -0,0 +1,47 @@
+//===- Win32/DynamicLibrary.cpp - Win32 DL 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 Win32 specific implementation of the DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+#include "Win32.h"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Win32 specific code 
+//===          and must not be UNIX code
+//===----------------------------------------------------------------------===//
+
+DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
+  handle = LoadLibrary(filename);
+
+  if (handle == 0) {
+    char Buffer[100];
+    // FIXME: This should use FormatMessage
+    sprintf(Buffer, "Windows error code %d\n", GetLastError());
+    throw std::string(Buffer);
+  }
+}
+
+DynamicLibrary::~DynamicLibrary() {
+  if (handle)
+    FreeLibrary(handle);
+}
+
+void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
+  assert(handle !=0 && "Invalid DynamicLibrary handle");
+  return GetProcAddress(handle, symbolName);
+}
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
diff --git a/lib/System/Win32/DynamicLibrary.inc b/lib/System/Win32/DynamicLibrary.inc
new file mode 100644
index 0000000000..15730d43a0
--- /dev/null
+++ b/lib/System/Win32/DynamicLibrary.inc
@@ -0,0 +1,47 @@
+//===- Win32/DynamicLibrary.cpp - Win32 DL 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 Win32 specific implementation of the DynamicLibrary
+//
+//===----------------------------------------------------------------------===//
+
+#include "Win32.h"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Win32 specific code 
+//===          and must not be UNIX code
+//===----------------------------------------------------------------------===//
+
+DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
+  handle = LoadLibrary(filename);
+
+  if (handle == 0) {
+    char Buffer[100];
+    // FIXME: This should use FormatMessage
+    sprintf(Buffer, "Windows error code %d\n", GetLastError());
+    throw std::string(Buffer);
+  }
+}
+
+DynamicLibrary::~DynamicLibrary() {
+  if (handle)
+    FreeLibrary(handle);
+}
+
+void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
+  assert(handle !=0 && "Invalid DynamicLibrary handle");
+  return GetProcAddress(handle, symbolName);
+}
+
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab