backtrace() for Win32

Tue Apr 23 18:54:00 GMT 2002

I'm checking this in.
 - a
2002年04月23日 Adam Megacz <adam@xwt.org>
 * win32.cc, include/win32.cc (backtrace): Added this function
 because Win32 does not supply it.
Index: win32.cc
===================================================================
RCS file: /cvs/gcc/gcc/libjava/win32.cc,v
retrieving revision 1.4.8.7
diff -u -r1.4.8.7 win32.cc

--- win32.cc 11 Apr 2002 22:23:56 -0000 1.4.8.7
+++ win32.cc 24 Apr 2002 01:02:23 -0000
@@ -195,3 +195,25 @@
 break;
 }
 }
+
+/* Store up to SIZE return address of the current program state in
+ ARRAY and return the exact number of values stored. */
+int
+backtrace (void **__array, int __size)
+{
+ register void *_ebp __asm__ ("ebp");
+ register void *_esp __asm__ ("esp");
+ unsigned int *rfp;
+
+ int i=0;
+ for (rfp = *(unsigned int**)_ebp;
+ rfp && i < __size;
+ rfp = *(unsigned int **)rfp)
+ {
+ int diff = *rfp - (unsigned int)rfp;
+ if ((void*)rfp < _esp || diff > 4 * 1024 || diff < 0) break;
+
+ __array[i++] = (void*)(rfp[1]-4);
+ }
+ return i;
+}
Index: include/win32.h
===================================================================
RCS file: /cvs/gcc/gcc/libjava/include/win32.h,v
retrieving revision 1.3.8.4
diff -u -r1.3.8.4 win32.h
--- include/win32.h 7 Apr 2002 11:30:09 -0000 1.3.8.4
+++ include/win32.h 24 Apr 2002 01:02:23 -0000
@@ -29,4 +29,10 @@
 // Ignore.
 }
 
+#define HAVE_BACKTRACE
+
+/* 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);
+
 #endif /* __JV_WIN32_H__ */
