Examples with WalkState com.ibm.j9ddr.vm29.j9.stackwalker.WalkState used on opensource projects

Example 11 with WalkState

use of com.ibm.j9ddr.vm29.j9.stackwalker.WalkState in project openj9 by eclipse.

the class StackWalkCommand method run.

public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    try {
        UDATAPointer sp = UDATAPointer.NULL;
        UDATAPointer arg0EA = UDATAPointer.NULL;
        U8Pointer pc = U8Pointer.NULL;
        J9MethodPointer literals = J9MethodPointer.NULL;
        J9VMEntryLocalStoragePointer entryLocalStorage = J9VMEntryLocalStoragePointer.NULL;
        String[] realArgs = null;
        if (args.length != 0) {
            realArgs = args[0].split(",");
        }
        if (args.length == 0 || !((realArgs.length == 1) || (realArgs.length == 5) || (realArgs.length == 6))) {
            CommandUtils.dbgPrint(out, "Usage:\n");
            CommandUtils.dbgPrint(out, "\t!stack thread\n");
            CommandUtils.dbgPrint(out, "\t!stack thread,sp,a0,pc,literals\n");
            CommandUtils.dbgPrint(out, "\t!stack thread,sp,a0,pc,literals,els\n");
            CommandUtils.dbgPrint(out, "\tUse !stackslots instead of !stack to see slot values\n");
            if (J9BuildFlags.interp_nativeSupport) {
                CommandUtils.dbgPrint(out, "\tUse !jitstack or !jitstackslots to start the walk at a JIT frame\n");
            }
            // dbgPrintRegisters(1);
            return;
        }
        long address = CommandUtils.parsePointer(realArgs[0], J9BuildFlags.env_data64);
        if (0 == address) {
            /* Parse error is captured in CommandUtils.parsePointer method and message is printed */
            return;
        }
        J9VMThreadPointer thread = J9VMThreadPointer.cast(address);
        StackWalkerUtils.enableVerboseLogging(3, out);
        WalkState walkState = new WalkState();
        walkState.flags = J9_STACKWALK_RECORD_BYTECODE_PC_OFFSET;
        if (realArgs.length >= 5) {
            address = CommandUtils.parsePointer(realArgs[1], J9BuildFlags.env_data64);
            sp = UDATAPointer.cast(address);
            address = CommandUtils.parsePointer(realArgs[2], J9BuildFlags.env_data64);
            arg0EA = UDATAPointer.cast(address);
            address = CommandUtils.parsePointer(realArgs[3], J9BuildFlags.env_data64);
            pc = U8Pointer.cast(address);
            address = CommandUtils.parsePointer(realArgs[4], J9BuildFlags.env_data64);
            literals = J9MethodPointer.cast(address);
        } else {
            sp = thread.sp();
            arg0EA = thread.arg0EA();
            pc = thread.pc();
            literals = thread.literals();
        }
        if (realArgs.length >= 6) {
            address = CommandUtils.parsePointer(realArgs[5], J9BuildFlags.env_data64);
            entryLocalStorage = J9VMEntryLocalStoragePointer.cast(address);
        } else {
            if (J9BuildFlags.interp_nativeSupport) {
                entryLocalStorage = thread.entryLocalStorage();
            }
        }
        if (command.equalsIgnoreCase("!stackslots")) {
            walkState.flags |= J9_STACKWALK_ITERATE_O_SLOTS;
            // 100 is highly arbitrary but basically means "print everything".
            // It is used in jextract where the message levels have been copied
            // from to begin with, so it should mean we get the same output.
            StackWalkerUtils.enableVerboseLogging(100, out);
            walkState.callBacks = new BaseStackWalkerCallbacks();
        } else {
            StackWalkerUtils.enableVerboseLogging(0, out);
            walkState.callBacks = new TerseStackWalkerCallbacks();
            walkState.flags |= J9_STACKWALK_ITERATE_FRAMES;
        }
        walkState.walkThread = thread;
        StackWalkResult result = StackWalker.walkStackFrames(walkState, sp, arg0EA, pc, literals, entryLocalStorage);
        if (result != StackWalkResult.NONE) {
            out.println("Stack walk result: " + result);
        }
        StackWalkerUtils.disableVerboseLogging();
        out.flush();
    } catch (CorruptDataException e) {
        throw new DDRInteractiveCommandException(e);
    }
}

Example 12 with WalkState

use of com.ibm.j9ddr.vm29.j9.stackwalker.WalkState in project openj9 by eclipse.

the class CheckVMThreadStacks method dumpStackTrace.

/* TODO : this is an implementation of the internal VM function dumpStackTrace
	 * and really should be somewhere global and public */
private void dumpStackTrace(J9VMThreadPointer walkThread) {
    WalkState walkState = new WalkState();
    walkState.walkThread = walkThread;
    walkState.flags = J9_STACKWALK_VISIBLE_ONLY | J9_STACKWALK_INCLUDE_NATIVES | J9_STACKWALK_ITERATE_FRAMES;
    walkState.callBacks = new BaseStackWalkerCallbacks() {

        public FrameCallbackResult frameWalkFunction(J9VMThreadPointer walkThread, WalkState walkState) {
            String className = "(unknown class)";
            if (walkState.constantPool.notNull()) {
                try {
                    className = J9ClassHelper.getName(walkState.constantPool.ramClass());
                } catch (CorruptDataException e) {
                // TODO Auto-generated catch block
                }
            }
            if (walkState.method.isNull()) {
                getReporter().println(String.format("0x%08X %s (unknown method)", walkState.pc.getAddress(), className));
            } else {
                if (walkState.jitInfo.isNull()) {
                    boolean isNative = false;
                    U8Pointer bytecodes = U8Pointer.NULL;
                    String name = "(corrupt)";
                    String sig = "(corrupt)";
                    try {
                        J9ROMMethodPointer romMethod = J9MethodHelper.romMethod(walkState.method);
                        isNative = romMethod.modifiers().allBitsIn(J9_JAVA_NATIVE);
                        if (!isNative) {
                            bytecodes = J9ROMMethodHelper.bytecodes(romMethod);
                        }
                        name = J9ROMMethodHelper.getName(romMethod);
                        sig = J9ROMMethodHelper.getSignature(romMethod);
                    } catch (CorruptDataException e) {
                    // This should never happen
                    }
                    if (isNative) {
                        getReporter().println(String.format(" NATIVE   %s.%s%s", className, name, sig));
                    } else {
                        getReporter().println(String.format(" %08X %s.%s%s", walkState.pc.sub(bytecodes).longValue(), className, name, sig));
                    }
                } else {
                    boolean isInlined = walkState.inlineDepth != 0;
                    U8Pointer jitPC = walkState.pc;
                    String name = "(corrupt)";
                    String sig = "(corrupt)";
                    try {
                        J9ROMMethodPointer romMethod = J9MethodHelper.romMethod(walkState.method);
                        name = J9UTF8Helper.stringValue(romMethod.nameAndSignature().name());
                        sig = J9UTF8Helper.stringValue(romMethod.nameAndSignature().signature());
                        if (!isInlined) {
                            jitPC = U8Pointer.cast(jitPC.sub(U8Pointer.cast(walkState.method.extra())).longValue());
                        }
                    } catch (CorruptDataException e) {
                    // This should never happen
                    }
                    if (isInlined) {
                        getReporter().println(String.format(" INLINED  %s.%s%s  (@%s)", className, name, sig, formatPointer(walkState.pc)));
                    } else {
                        getReporter().println(String.format(" %08X %s.%s%s  (@%s)", jitPC.getAddress(), className, name, sig, formatPointer(walkState.pc)));
                    }
                }
            }
            return FrameCallbackResult.KEEP_ITERATING;
        }
    };
    StackWalker.walkStackFrames(walkState);
}