3 files changed, 46 insertions, 5 deletions
diff --git a/libjava/include/java-stack.h b/libjava/include/java-stack.h
index 7bf4d7b..eb1ddcc 100644
--- a/libjava/include/java-stack.h
+++ b/libjava/include/java-stack.h
@@ -1,6 +1,6 @@
 // java-stack.h - Definitions for unwinding & inspecting the call stack.
 
-/* Copyright (C) 2005  Free Software Foundation
+/* Copyright (C) 2005, 2006  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -11,6 +11,7 @@ details.  */
 #ifndef __JV_STACKTRACE_H__
 #define __JV_STACKTRACE_H__
 
+#include <stdlib.h>
 #include <unwind.h>
 
 #include <gcj/cni.h>
@@ -126,5 +127,35 @@ public:
   
 };
 
+// Information about a given address.
+struct _Jv_AddrInfo
+{
+  // File name of the defining module.
+  const char *file_name;
+
+  // Base address of the loaded module.
+  void *base;
+
+  // Name of the nearest symbol.
+  const char *sym_name;
+
+  // Address of the nearest symbol.
+  void *sym_addr;
+
+  ~_Jv_AddrInfo (void)
+    {
+      // On systems with a real dladdr(), the file and symbol names given by
+      // _Jv_platform_dladdr() are not dynamically allocated.  On Windows,
+      // they are.
+
+#ifdef WIN32
+      if (file_name)
+        free ((void *)file_name);
+
+      if (sym_name)
+        free ((void *)sym_name);
+#endif /* WIN32 */
+    }
+};
 
 #endif /* __JV_STACKTRACE_H__ */
diff --git a/libjava/include/posix.h b/libjava/include/posix.h
index 5b74eb7..15795dd 100644
--- a/libjava/include/posix.h
+++ b/libjava/include/posix.h
@@ -194,4 +194,11 @@ _Jv_pipe (int filedes[2])
   return ::pipe (filedes);
 }
 
+// Forward declaration.  See java-stack.h for definition.
+struct _Jv_AddrInfo;
+
+// Given an address, determine the executable or shared object that defines
+// it and the nearest named symbol.
+extern int _Jv_platform_dladdr (const void *addr, _Jv_AddrInfo *info);
+
 #endif /* __JV_POSIX_H__ */
diff --git a/libjava/include/win32.h b/libjava/include/win32.h
index 3e2beab..26c307c 100644
--- a/libjava/include/win32.h
+++ b/libjava/include/win32.h
@@ -11,7 +11,7 @@ details.  */
 #ifndef __JV_WIN32_H__
 #define __JV_WIN32_H__
 
-// Enable UNICODE Support.?
+// Enable UNICODE support?
 
 #ifdef MINGW_LIBGCJ_UNICODE
 #define UNICODE
@@ -175,8 +175,11 @@ _Jv_platform_usleep (unsigned long usecs)
 }
 #endif /* JV_HASH_SYNCHRONIZATION */
 
-/* Store up to SIZE return address of the current program state in
-   ARRAY and return the exact number of values stored.  */
-extern int backtrace (void **__array, int __size);
+// Forward declaration.  See java-stack.h for definition.
+struct _Jv_AddrInfo;
+
+// Given an address, determine the executable or shared object that defines
+// it and the nearest named symbol.
+extern int _Jv_platform_dladdr (const void *addr, _Jv_AddrInfo *info);
 
 #endif /* __JV_WIN32_H__ */