#include <stdio.h>
+#include <java/lang/Boolean.h>
#include <java/lang/Class.h>
#include <java/lang/Long.h>
+#include <java/lang/reflect/Method.h>
+#include <java/security/AccessController.h>
#include <java/util/ArrayList.h>
#include <java/util/IdentityHashMap.h>
+#include <gnu/classpath/jdwp/Jdwp.h>
+#include <gnu/classpath/VMStackWalker.h>
#include <gnu/java/lang/MainThread.h>
#include <gnu/gcj/runtime/NameFinder.h>
#include <gnu/gcj/runtime/StringBuffer.h>
using namespace java::util;
using namespace gnu::gcj::runtime;
+#ifdef __ARM_EABI_UNWINDER__
+#define _URC_NORMAL_STOP _URC_FAILURE
+#endif
+
// Maps ncode values to their containing native class.
// NOTE: Currently this Map contradicts class GC for native classes. This map
// (and the "new class stack") will need to use WeakReferences in order to
// enable native class GC.
-static java::util::IdentityHashMap *ncodeMap;
+java::util::IdentityHashMap *_Jv_StackTrace::ncodeMap;
// Check the "class stack" for any classes initialized since we were last
// called, and add them to ncodeMap.
jclass klass;
while ((klass = _Jv_PopClass ()))
- if (!_Jv_IsInterpretedClass (klass))
- {
- //printf ("got %s\n", klass->name->data);
- for (int i = 0; i < klass->method_count; i++)
- {
- _Jv_Method *method = &klass->methods[i];
- void *ncode = method->ncode;
- // Add non-abstract methods to ncodeMap.
- if (ncode)
- {
- ncode = UNWRAP_FUNCTION_DESCRIPTOR (ncode);
- ncodeMap->put ((java::lang::Object *) ncode, klass);
- }
- }
- }
+ {
+ //printf ("got %s\n", klass->name->data);
+ for (int i = 0; i < klass->method_count; i++)
+ {
+ _Jv_Method *method = &klass->methods[i];
+ void *ncode = method->ncode;
+ // Add non-abstract methods to ncodeMap.
+ if (ncode)
+ {
+ ncode = UNWRAP_FUNCTION_DESCRIPTOR (ncode);
+ ncodeMap->put ((java::lang::Object *) ncode, klass);
+ }
+ }
+ }
}
// Given a native frame, return the class which this code belongs
// look it up in ncodeMap
if (frame->start_ip)
- klass = (jclass) ncodeMap->get ((jobject) frame->start_ip);
+ {
+ klass = (jclass) ncodeMap->get ((jobject) frame->start_ip);
+
+ // Exclude interpreted classes
+ if (klass != NULL && _Jv_IsInterpretedClass (klass))
+ klass = NULL;
+ }
return klass;
}
// correspondance between call frames in the interpreted stack and occurances
// of _Jv_InterpMethod::run() on the native stack.
#ifdef INTERPRETER
- void *interp_run = (void *) &_Jv_InterpMethod::run;
+ void *interp_run = NULL;
+
+ if (::gnu::classpath::jdwp::Jdwp::isDebugging)
+ interp_run = (void *) &_Jv_InterpMethod::run_debug;
+ else
+ interp_run = (void *) &_Jv_InterpMethod::run;
+
if (func_addr == UNWRAP_FUNCTION_DESCRIPTOR (interp_run))
{
state->frames[pos].type = frame_interpreter;
- state->frames[pos].interp.meth = state->interp_frame->self;
+ _Jv_Frame *frame = static_cast<_Jv_Frame *> (state->interp_frame);
+ state->frames[pos].interp.meth
+ = static_cast<_Jv_InterpMethod *> (frame->self);
state->frames[pos].interp.pc = state->interp_frame->pc;
- state->interp_frame = state->interp_frame->next;
+ state->interp_frame = state->interp_frame->next_interp;
}
- else
+ else
+ // We handle proxies in the same way as interpreted classes
+ if (_Jv_is_proxy (func_addr))
+ {
+ state->frames[pos].type = frame_proxy;
+ state->frames[pos].proxyClass = state->interp_frame->proxyClass;
+ state->frames[pos].proxyMethod = state->interp_frame->proxyMethod;
+ state->interp_frame = state->interp_frame->next_interp;
+ }
+ else
#endif
{
+#ifdef HAVE_GETIPINFO
_Unwind_Ptr ip;
int ip_before_insn = 0;
ip = _Unwind_GetIPInfo (context, &ip_before_insn);
// to ensure we get the correct line number for the call itself.
if (! ip_before_insn)
--ip;
-
+#endif
state->frames[pos].type = frame_native;
+#ifdef HAVE_GETIPINFO
state->frames[pos].ip = (void *) ip;
+#else
+ state->frames[pos].ip = (void *) _Unwind_GetIP (context);
+#endif
state->frames[pos].start_ip = func_addr;
}
_Jv_UnwindState state (trace_size);
state.frames = (_Jv_StackFrame *) &frames;
-#ifdef SJLJ_EXCEPTIONS
- // The Unwind interface doesn't work with the SJLJ exception model.
- // Fall back to a platform-specific unwinder.
- fallback_backtrace (&state);
-#else /* SJLJ_EXCEPTIONS */
_Unwind_Backtrace (UnwindTraceFn, &state);
-#endif /* SJLJ_EXCEPTIONS */
// Copy the trace and return it.
int traceSize = sizeof (_Jv_StackTrace) +
_Jv_InterpClass *interp_class =
(_Jv_InterpClass *) interp_meth->defining_class->aux_info;
*sourceFileName = interp_class->source_file_name;
- *lineNum = interp_meth->get_source_line(frame->interp.pc);
+ // The interpreter advances the PC before executing an instruction,
+ // so roll-back 1 byte to ensure the line number is accurate.
+ *lineNum = interp_meth->get_source_line(frame->interp.pc - 1);
return;
}
#endif
+ if (frame->type == frame_proxy)
+ {
+ *sourceFileName = NULL;
+ *lineNum = 0;
+ return;
+ }
+
// Use _Jv_platform_dladdr() to determine in which binary the address IP
// resides.
_Jv_AddrInfo info;
else
offset = (_Unwind_Ptr) ip - (_Unwind_Ptr) info.base;
+#ifndef HAVE_GETIPINFO
+ // The unwinder gives us the return address. In order to get the right
+ // line number for the stack trace, roll it back a little.
+ offset -= 1;
+#endif
+
finder->lookup (binaryName, (jlong) offset);
*sourceFileName = finder->getSourceFile();
*lineNum = finder->getLineNum();
}
}
}
+ else if (frame->type == frame_proxy)
+ {
+ klass = frame->proxyClass;
+ meth = frame->proxyMethod;
+ }
#ifdef INTERPRETER
else if (frame->type == frame_interpreter)
{
_Jv_StackTrace::GetCallerInfo (jclass checkClass, jclass *caller_class,
_Jv_Method **caller_meth)
{
-#ifndef SJLJ_EXCEPTIONS
int trace_size = 20;
_Jv_StackFrame frames[trace_size];
_Jv_UnwindState state (trace_size);
*caller_class = trace_data.foundClass;
if (caller_meth)
*caller_meth = trace_data.foundMeth;
-#else
- return;
-#endif
}
-// Return a java array containing the Java classes on the stack above CHECKCLASS.
-JArray<jclass> *
-_Jv_StackTrace::GetClassContext (jclass checkClass)
+_Unwind_Reason_Code
+_Jv_StackTrace::non_system_trace_fn (_Jv_UnwindState *state)
{
- JArray<jclass> *result = NULL;
+ _Jv_StackFrame *frame = &state->frames[state->pos];
+ FillInFrameInfo (frame);
+
+ ClassLoader *classLoader = NULL;
- int trace_size = 100;
+ if (frame->klass)
+ {
+ classLoader = frame->klass->getClassLoaderInternal();
+#ifdef INTERPRETER
+ if (classLoader != NULL)
+ {
+ state->trace_data = (void *) classLoader;
+ return _URC_NORMAL_STOP;
+ }
+#endif
+ }
+
+ return _URC_NO_REASON;
+}
+
+ClassLoader *
+_Jv_StackTrace::GetFirstNonSystemClassLoader ()
+{
+ int trace_size = 32;
_Jv_StackFrame frames[trace_size];
_Jv_UnwindState state (trace_size);
state.frames = (_Jv_StackFrame *) &frames;
+ state.trace_function = non_system_trace_fn;
+ state.trace_data = NULL;
//JvSynchronized (ncodeMap);
UpdateNCodeMap ();
+
+ _Unwind_Backtrace (UnwindTraceFn, &state);
+
+ if (state.trace_data)
+ return (ClassLoader *) state.trace_data;
+
+ return NULL;
+}
+
+struct AccessControlTraceData
+{
+ jint length;
+ jboolean privileged;
+};
+
+_Unwind_Reason_Code
+_Jv_StackTrace::accesscontrol_trace_fn (_Jv_UnwindState *state)
+{
+ AccessControlTraceData *trace_data = (AccessControlTraceData *)
+ state->trace_data;
+ _Jv_StackFrame *frame = &state->frames[state->pos];
+ FillInFrameInfo (frame);
+
+ if (!(frame->klass && frame->meth))
+ return _URC_NO_REASON;
+
+ trace_data->length++;
-#ifdef SJLJ_EXCEPTIONS
- // The Unwind interface doesn't work with the SJLJ exception model.
- // Fall back to a platform-specific unwinder.
- fallback_backtrace (&state);
-#else /* SJLJ_EXCEPTIONS */
+ // If the previous frame was a call to doPrivileged, then this is
+ // the last frame we look at.
+ if (trace_data->privileged)
+ return _URC_NORMAL_STOP;
+
+ if (frame->klass == &::java::security::AccessController::class$
+ && strcmp (frame->meth->name->chars(), "doPrivileged") == 0)
+ trace_data->privileged = true;
+
+ return _URC_NO_REASON;
+}
+
+jobjectArray
+_Jv_StackTrace::GetAccessControlStack (void)
+{
+ int trace_size = 100;
+ _Jv_StackFrame frames[trace_size];
+ _Jv_UnwindState state (trace_size);
+ state.frames = (_Jv_StackFrame *) &frames;
+
+ AccessControlTraceData trace_data;
+ trace_data.length = 0;
+ trace_data.privileged = false;
+
+ state.trace_function = accesscontrol_trace_fn;
+ state.trace_data = (void *) &trace_data;
+
+ UpdateNCodeMap();
_Unwind_Backtrace (UnwindTraceFn, &state);
-#endif /* SJLJ_EXCEPTIONS */
- // Count the number of Java frames on the stack.
- int jframe_count = 0;
- bool seen_checkClass = false;
- int start_pos = -1;
+ JArray<jclass> *classes = (JArray<jclass> *)
+ _Jv_NewObjectArray (trace_data.length, &::java::lang::Class::class$, NULL);
+ jclass *c = elements (classes);
+
+ for (int i = 0, j = 0; i < state.pos; i++)
+ {
+ _Jv_StackFrame *frame = &state.frames[i];
+ if (!frame->klass || !frame->meth)
+ continue;
+ c[j] = frame->klass;
+ j++;
+ }
+
+ jobjectArray result =
+ (jobjectArray) _Jv_NewObjectArray (2, &::java::lang::Object::class$,
+ NULL);
+ jobject *r = elements (result);
+ r[0] = (jobject) classes;
+ r[1] = (jobject) new Boolean (trace_data.privileged);
+
+ return result;
+}
+
+JArray<jclass> *
+_Jv_StackTrace::GetStackWalkerStack ()
+{
+ int trace_size = 100;
+ _Jv_StackFrame frames[trace_size];
+ _Jv_UnwindState state (trace_size);
+ state.frames = (_Jv_StackFrame *) &frames;
+
+ UpdateNCodeMap ();
+ _Unwind_Backtrace (UnwindTraceFn, &state);
+
+ int num_frames = 0, start_frame = -1;
+ enum
+ {
+ VMSW_GETCLASSCONTEXT,
+ JLRM_INVOKE_OR_USER_FN,
+ USER_FN
+ }
+ expect = VMSW_GETCLASSCONTEXT;
for (int i = 0; i < state.pos; i++)
{
_Jv_StackFrame *frame = &state.frames[i];
FillInFrameInfo (frame);
-
- if (seen_checkClass)
+ if (!frame->klass || !frame->meth)
+ continue;
+
+ switch (expect)
{
- if (frame->klass)
- {
- jframe_count++;
- if (start_pos == -1)
- start_pos = i;
- }
+ case VMSW_GETCLASSCONTEXT:
+ JvAssert (
+ frame->klass == &::gnu::classpath::VMStackWalker::class$
+ && strcmp (frame->meth->name->chars(), "getClassContext") == 0);
+ expect = JLRM_INVOKE_OR_USER_FN;
+ break;
+
+ case JLRM_INVOKE_OR_USER_FN:
+ if (frame->klass != &::java::lang::reflect::Method::class$
+ || strcmp (frame->meth->name->chars(), "invoke") != 0)
+ start_frame = i;
+ expect = USER_FN;
+ break;
+
+ case USER_FN:
+ if (start_frame == -1)
+ start_frame = i;
+ break;
+ }
+
+ if (start_frame != -1)
+ {
+ if (frame->klass == &::gnu::java::lang::MainThread::class$)
+ break;
+ num_frames++;
}
- else
- seen_checkClass = frame->klass == checkClass;
}
- result = (JArray<jclass> *) _Jv_NewObjectArray (jframe_count, &Class::class$, NULL);
- int pos = 0;
-
- for (int i = start_pos; i < state.pos; i++)
+ JvAssert (num_frames > 0 && start_frame > 0);
+
+ JArray<jclass> *result = (JArray<jclass> *)
+ _Jv_NewObjectArray (num_frames, &::java::lang::Class::class$, NULL);
+ jclass *c = elements (result);
+
+ for (int i = start_frame, j = 0; i < state.pos && j < num_frames; i++)
{
_Jv_StackFrame *frame = &state.frames[i];
- if (frame->klass)
- elements(result)[pos++] = frame->klass;
+ if (!frame->klass || !frame->meth)
+ continue;
+ c[j] = frame->klass;
+ j++;
}
+
return result;
}
+typedef enum
+ {
+ VMSW_GET_CALLING_ITEM,
+ JLRM_INVOKE_OR_CALLER,
+ CALLER,
+ CALLER_OF_CALLER
+ } gswcc_expect;
+
+struct StackWalkerTraceData
+{
+ gswcc_expect expect;
+ jclass result;
+};
+
_Unwind_Reason_Code
-_Jv_StackTrace::non_system_trace_fn (_Jv_UnwindState *state)
+_Jv_StackTrace::stackwalker_trace_fn (_Jv_UnwindState *state)
{
+ StackWalkerTraceData *trace_data = (StackWalkerTraceData *)
+ state->trace_data;
_Jv_StackFrame *frame = &state->frames[state->pos];
FillInFrameInfo (frame);
+
+ if (!(frame->klass && frame->meth))
+ return _URC_NO_REASON;
+
+ switch (trace_data->expect)
+ {
+ case VMSW_GET_CALLING_ITEM:
+ JvAssert (frame->klass == &::gnu::classpath::VMStackWalker::class$);
+ trace_data->expect = JLRM_INVOKE_OR_CALLER;
+ break;
+
+ case JLRM_INVOKE_OR_CALLER:
+ if (frame->klass == &::java::lang::reflect::Method::class$
+ && strcmp (frame->meth->name->chars(), "invoke") == 0)
+ trace_data->expect = CALLER;
+ else
+ trace_data->expect = CALLER_OF_CALLER;
+ break;
+
+ case CALLER:
+ trace_data->expect = CALLER_OF_CALLER;
+ break;
+
+ case CALLER_OF_CALLER:
+ trace_data->result = frame->klass;
+ return _URC_NORMAL_STOP;
+ }
+
+ return _URC_NO_REASON;
+}
+
+jclass
+_Jv_StackTrace::GetStackWalkerCallingClass (void)
+{
+ int trace_size = 100;
+ _Jv_StackFrame frames[trace_size];
+ _Jv_UnwindState state (trace_size);
+ state.frames = (_Jv_StackFrame *) &frames;
+
+ StackWalkerTraceData trace_data;
+ trace_data.expect = VMSW_GET_CALLING_ITEM;
+ trace_data.result = NULL;
- ClassLoader *classLoader = NULL;
+ state.trace_function = stackwalker_trace_fn;
+ state.trace_data = (void *) &trace_data;
- if (frame->klass)
+ UpdateNCodeMap();
+ _Unwind_Backtrace (UnwindTraceFn, &state);
+
+ return trace_data.result;
+}
+
+struct StackWalkerNNLTraceData
+{
+ gswcc_expect expect;
+ ClassLoader *result;
+};
+
+_Unwind_Reason_Code
+_Jv_StackTrace::stackwalker_nnl_trace_fn (_Jv_UnwindState *state)
+{
+ StackWalkerNNLTraceData *trace_data = (StackWalkerNNLTraceData *)
+ state->trace_data;
+ _Jv_StackFrame *frame = &state->frames[state->pos];
+ FillInFrameInfo (frame);
+
+ if (!(frame->klass && frame->meth))
+ return _URC_NO_REASON;
+
+ switch (trace_data->expect)
{
- classLoader = frame->klass->getClassLoaderInternal();
-#ifdef INTERPRETER
- if (classLoader != NULL)
- {
- state->trace_data = (void *) classLoader;
+ case VMSW_GET_CALLING_ITEM:
+ JvAssert (frame->klass == &::gnu::classpath::VMStackWalker::class$);
+ trace_data->expect = JLRM_INVOKE_OR_CALLER;
+ break;
+
+ case JLRM_INVOKE_OR_CALLER:
+ if (frame->klass == &::java::lang::reflect::Method::class$
+ && strcmp (frame->meth->name->chars(), "invoke") == 0)
+ trace_data->expect = CALLER;
+ else
+ trace_data->expect = CALLER_OF_CALLER;
+ break;
+
+ case CALLER:
+ trace_data->expect = CALLER_OF_CALLER;
+ break;
+
+ case CALLER_OF_CALLER:
+ ClassLoader *cl = frame->klass->getClassLoaderInternal ();
+ if (cl != NULL)
+ {
+ trace_data->result = cl;
return _URC_NORMAL_STOP;
}
-#endif
}
return _URC_NO_REASON;
}
ClassLoader *
-_Jv_StackTrace::GetFirstNonSystemClassLoader ()
+_Jv_StackTrace::GetStackWalkerFirstNonNullLoader (void)
{
- int trace_size = 32;
+ int trace_size = 100;
_Jv_StackFrame frames[trace_size];
_Jv_UnwindState state (trace_size);
state.frames = (_Jv_StackFrame *) &frames;
- state.trace_function = non_system_trace_fn;
- state.trace_data = NULL;
- //JvSynchronized (ncodeMap);
- UpdateNCodeMap ();
+ StackWalkerNNLTraceData trace_data;
+ trace_data.expect = VMSW_GET_CALLING_ITEM;
+ trace_data.result = NULL;
-#ifdef SJLJ_EXCEPTIONS
- // The Unwind interface doesn't work with the SJLJ exception model.
- // Fall back to a platform-specific unwinder.
- fallback_backtrace (&state);
-#else /* SJLJ_EXCEPTIONS */
+ state.trace_function = stackwalker_nnl_trace_fn;
+ state.trace_data = (void *) &trace_data;
+
+ UpdateNCodeMap();
_Unwind_Backtrace (UnwindTraceFn, &state);
-#endif /* SJLJ_EXCEPTIONS */
- if (state.trace_data)
- return (ClassLoader *) state.trace_data;
-
- return NULL;
+ return trace_data.result;
}
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