private static void addBackTraceElement(
Ruby runtime, RubyArray backtrace, Frame frame, Frame previousFrame) {
if (frame != previousFrame
&& // happens with native exceptions, should not filter those out
frame.getLine() == previousFrame.getLine()
&& frame.getName() != null
&& frame.getName().equals(previousFrame.getName())
&& frame.getFile().equals(previousFrame.getFile())) {
return;
}
RubyString traceLine;
if (previousFrame.getName() != null) {
traceLine =
RubyString.newString(
runtime,
frame.getFile()
+ ':'
+ (frame.getLine() + 1)
+ ":in `"
+ previousFrame.getName()
+ '\'');
} else if (runtime.is1_9()) {
// TODO: This probably isn't the best hack, but it works until we can have different
// root frame setup for 1.9 easily.
traceLine =
RubyString.newString(
runtime, frame.getFile() + ':' + (frame.getLine() + 1) + ":in `<main>'");
} else {
traceLine = RubyString.newString(runtime, frame.getFile() + ':' + (frame.getLine() + 1));
}
backtrace.append(traceLine);
}
/**
* Return a binding representing the previous call's state but with a specified self
*
* @param self the self object to use
* @return the current binding, using the specified self
*/
public Binding previousBinding(IRubyObject self) {
Frame frame = getPreviousFrame();
Frame current = getCurrentFrame();
return new Binding(
self,
frame,
frame.getVisibility(),
getPreviousRubyClass(),
getCurrentScope(),
current.getFile(),
current.getLine());
}
private RubyStackTraceElement[] buildTrace(RubyStackTraceElement[] newTrace) {
for (int i = 0; i < newTrace.length; i++) {
Frame current = frameStack[i];
String klazzName = getClassNameFromFrame(current);
String methodName = getMethodNameFromFrame(current);
newTrace[newTrace.length - 1 - i] =
new RubyStackTraceElement(
klazzName,
methodName,
current.getFile(),
current.getLine() + 1,
current.isBindingFrame());
}
return newTrace;
}
public void setFileAndLine(Frame frame) {
this.file = frame.getFile();
this.line = frame.getLine();
}
/**
* Return a binding representing the previous call's state
*
* @return the current binding
*/
public Binding previousBinding() {
Frame frame = getPreviousFrame();
Frame current = getCurrentFrame();
return new Binding(
frame, getPreviousRubyClass(), getCurrentScope(), current.getFile(), current.getLine());
}
public static IRubyObject createRubyHybridBacktrace(
Ruby runtime,
RubyStackTraceElement[] backtraceFrames,
RubyStackTraceElement[] stackTrace,
boolean debug) {
RubyArray traceArray = RubyArray.newArray(runtime);
ThreadContext context = runtime.getCurrentContext();
int rubyFrameIndex = backtraceFrames.length - 1;
for (int i = 0; i < stackTrace.length; i++) {
RubyStackTraceElement element = stackTrace[i];
// look for mangling markers for compiled Ruby in method name
int index = element.getMethodName().indexOf("$RUBY$");
if (index >= 0) {
String unmangledMethod = element.getMethodName().substring(index + 6);
RubyString str =
RubyString.newString(
runtime,
element.getFileName()
+ ":"
+ element.getLineNumber()
+ ":in `"
+ unmangledMethod
+ "'");
traceArray.append(str);
// if it's not a rescue or ensure, there's a frame associated, so decrement
if (!(element.getMethodName().contains("__rescue__")
|| element.getMethodName().contains("__ensure__"))) {
rubyFrameIndex--;
}
continue;
}
// look for __file__ method name for compiled roots
if (element.getMethodName().equals("__file__")) {
RubyString str =
RubyString.newString(
runtime, element.getFileName() + ":" + element.getLineNumber() + ": `<toplevel>'");
traceArray.append(str);
rubyFrameIndex--;
continue;
}
// look for mangling markers for bound, unframed methods in class name
index = element.getClassName().indexOf("$RUBYINVOKER$");
if (index >= 0) {
// unframed invokers have no Ruby frames, so pull from class name
// but use current frame as file and line
String unmangledMethod = element.getClassName().substring(index + 13);
Frame current = context.frameStack[rubyFrameIndex];
RubyString str =
RubyString.newString(
runtime,
current.getFile()
+ ":"
+ (current.getLine() + 1)
+ ":in `"
+ unmangledMethod
+ "'");
traceArray.append(str);
continue;
}
// look for mangling markers for bound, framed methods in class name
index = element.getClassName().indexOf("$RUBYFRAMEDINVOKER$");
if (index >= 0) {
// framed invokers will have Ruby frames associated with them
addBackTraceElement(
traceArray,
backtraceFrames[rubyFrameIndex],
backtraceFrames[rubyFrameIndex - 1],
FrameType.METHOD);
rubyFrameIndex--;
continue;
}
// try to mine out a Ruby frame using our list of interpreter entry-point markers
String classMethod = element.getClassName() + "." + element.getMethodName();
FrameType frameType = INTERPRETED_FRAMES.get(classMethod);
if (frameType != null) {
// Frame matches one of our markers for "interpreted" calls
if (rubyFrameIndex == 0) {
addBackTraceElement(
traceArray,
backtraceFrames[rubyFrameIndex],
backtraceFrames[rubyFrameIndex],
frameType);
} else {
addBackTraceElement(
traceArray,
backtraceFrames[rubyFrameIndex],
backtraceFrames[rubyFrameIndex - 1],
frameType);
rubyFrameIndex--;
}
continue;
} else {
// Frame is extraneous runtime information, skip it unless debug
if (debug) {
RubyString str =
RubyString.newString(runtime, createRubyBacktraceString(element.getElement()));
traceArray.append(str);
}
continue;
}
}
return traceArray;
}