mirror of git://gcc.gnu.org/git/gcc.git
117 lines
3.5 KiB
C++
117 lines
3.5 KiB
C++
// natVMStackWalker.cc
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/* Copyright (C) 2006, 2007 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <platform.h>
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java-stack.h>
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#include <gnu/classpath/VMStackWalker.h>
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#include <gnu/gcj/RawData.h>
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#include <java/lang/ClassLoader.h>
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#include <java/lang/Class.h>
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#ifndef __ARM_EABI_UNWINDER__
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// Return the class of the method that contains PC.
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// This is a macro not a function, since defining it as one would
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// introduce an extra frame on the stack. */
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#define GET_CALLING_CLASS(PC) \
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({ \
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void *f = _Unwind_FindEnclosingFunction (PC); \
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\
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/* FIXME: it might well be a good idea to cache pc values here in \
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order to avoid repeated invocations of \
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_Unwind_FindEnclosingFunction, which is quite expensive. On the \
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other hand, which not simply write a caching version of \
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_Unwind_FindEnclosingFunction itself? That would probably be \
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worthwhile. */ \
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\
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_Jv_StackTrace::UpdateNCodeMap (); \
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jclass klass = (jclass) _Jv_StackTrace::ncodeMap->get ((jobject) f); \
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\
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/* If the caller is a compiled frame and the caller of the caller is \
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an interpreted frame then klass will be null and we need to \
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unwind the stack. */ \
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if (!klass) \
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klass = _Jv_StackTrace::GetStackWalkerCallingClass (); \
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\
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klass; \
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})
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#else // __ARM_EABI_UNWINDER__
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// ARM EABI doesn't support _Unwind_FindEnclosingFunction.
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#define GET_CALLING_CLASS(PC) \
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(_Jv_StackTrace::GetStackWalkerCallingClass ())
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#endif
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JArray<jclass> *
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gnu::classpath::VMStackWalker::getClassContext(void)
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{
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_Jv_InitClass (&::gnu::classpath::VMStackWalker::class$);
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JArray<jclass> *result = _Jv_StackTrace::GetStackWalkerStack ();
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// Prevent GetStackWalkerStack() from being sibcalled.
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__asm__ __volatile__ ("" : : "g" (result));
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return result;
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}
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jclass
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gnu::classpath::VMStackWalker::getCallingClass(void)
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{
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_Jv_InitClass (&::gnu::classpath::VMStackWalker::class$);
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jclass result = _Jv_StackTrace::GetStackWalkerCallingClass ();
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__asm__ __volatile__ ("" : : "g" (result));
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return result;
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}
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jclass
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gnu::classpath::VMStackWalker::getCallingClass(::gnu::gcj::RawData *pc)
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{
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_Jv_InitClass (&::gnu::classpath::VMStackWalker::class$);
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jclass result = GET_CALLING_CLASS(pc);
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__asm__ __volatile__ ("" : : "g" (result));
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return result;
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}
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::java::lang::ClassLoader *
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gnu::classpath::VMStackWalker::getClassLoader(::java::lang::Class *c)
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{
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_Jv_InitClass (&::gnu::classpath::VMStackWalker::class$);
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return c->getClassLoaderInternal ();
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}
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::java::lang::ClassLoader *
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gnu::classpath::VMStackWalker::getCallingClassLoader(void)
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{
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_Jv_InitClass (&::gnu::classpath::VMStackWalker::class$);
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jclass klass = _Jv_StackTrace::GetStackWalkerCallingClass ();
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if (klass)
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return klass->getClassLoaderInternal ();
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else
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return NULL;
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}
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::java::lang::ClassLoader *
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gnu::classpath::VMStackWalker::getCallingClassLoader(::gnu::gcj::RawData *pc)
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{
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_Jv_InitClass (&::gnu::classpath::VMStackWalker::class$);
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jclass klass = GET_CALLING_CLASS(pc);
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if (klass)
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return klass->getClassLoaderInternal ();
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else
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return NULL;
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}
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::java::lang::ClassLoader *
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gnu::classpath::VMStackWalker::firstNonNullClassLoader(void)
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{
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_Jv_InitClass (&::gnu::classpath::VMStackWalker::class$);
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return _Jv_StackTrace::GetStackWalkerFirstNonNullLoader ();
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}
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