Examples with Stmt org.mapleir.ir.code.Stmt used on opensource projects

Example 31 with Stmt

use of org.mapleir.ir.code.Stmt in project maple-ir by LLVM-but-worse.

the class LiftConstructorCallsPass method tryLift.

private boolean tryLift(MethodNode m, ControlFlowGraph cfg) {
    Local lvar0_0 = cfg.getLocals().get(0, 0, false);
    /* only contains synthetic copies */
    BasicBlock entry = cfg.getEntries().iterator().next();
    for (BasicBlock b : cfg.vertices()) {
        for (Stmt stmt : b) {
            for (Expr e : stmt.enumerateOnlyChildren()) {
                if (e.getOpcode() == INVOKE) {
                    InvocationExpr invoke = (InvocationExpr) e;
                    if (invoke.getOwner().equals(m.owner.superName) && invoke.getName().equals("<init>")) {
                        Expr p1 = invoke.getPhysicalReceiver();
                        if (p1.getOpcode() == LOCAL_LOAD && ((VarExpr) p1).getLocal() == lvar0_0) {
                            Set<FlowEdge<BasicBlock>> predsEdges = cfg.getReverseEdges(b);
                            FlowEdge<BasicBlock> incoming;
                            if (predsEdges.size() == 1 && ((incoming = predsEdges.iterator().next()).getType() == FlowEdges.IMMEDIATE) && incoming.src() == entry) {
                                // BasicBlock liftBlock = new BasicBlock(cfg, cfg.vertices().size() + 1, new LabelNode());
                                /* split the block before the invocation and 
									 * insert a new block. */
                                split(cfg, b, stmt);
                                return true;
                            } else {
                                System.err.printf(" warn(nolift) for %s in %n%s%n", invoke, ControlFlowGraph.printBlock(b));
                                System.err.printf("  preds: %s%n", predsEdges);
                            }
                        } else {
                            throw new IllegalStateException(String.format("broken super call: %s", invoke));
                        }
                    }
                }
            }
        }
    }
    return false;
}

Example 32 with Stmt

use of org.mapleir.ir.code.Stmt in project maple-ir by LLVM-but-worse.

the class IPAnalysis method visitMethod.

@Override
protected void visitMethod(MethodNode m) {
    // Callbacks
    for (IPAnalysisVisitor v : visitors) {
        v.preVisitMethod(this, m);
    }
    // Do not trace library calls
    if (context.getApplication().isLibraryClass(m.owner.name)) {
        return;
    }
    // Create a mapping between the actual variable table indices and the parameter
    // indices in the method descriptor.
    boolean isStatic = (m.access & Opcodes.ACC_STATIC) != 0;
    int paramCount = Type.getArgumentTypes(m.desc).length;
    int off = (isStatic ? 0 : 1);
    int synthCount = paramCount + off;
    List<List<Expr>> lists = new ArrayList<>(synthCount);
    int[] idxs = new int[synthCount];
    // Scan for synthetic copies to populate indices
    ControlFlowGraph cfg = context.getIRCache().getFor(m);
    BasicBlock entry = cfg.getEntries().iterator().next();
    /* static:
		 *  first arg = 0
		 *
		 * non-static:
		 *  this = 0
		 *  first arg = 1*/
    int paramIndex = 0;
    for (Stmt stmt : entry) {
        if (stmt.getOpcode() == LOCAL_STORE) {
            CopyVarStmt cvs = (CopyVarStmt) stmt;
            if (cvs.isSynthetic()) {
                int varIndex = cvs.getVariable().getLocal().getIndex();
                if (!isStatic && varIndex == 0)
                    continue;
                idxs[paramIndex++] = varIndex;
                continue;
            }
        }
        break;
    }
    for (int j = 0; j < paramCount; j++) {
        lists.add(new ArrayList<>());
    }
    paramIndices.put(m, idxs);
    parameterInputs.put(m, lists);
    callers.put(m, new HashSet<>());
    // Callbacks
    for (IPAnalysisVisitor v : visitors) {
        v.postVisitMethod(this, m);
    }
}

Example 33 with Stmt

use of org.mapleir.ir.code.Stmt in project maple-ir by LLVM-but-worse.

the class MethodRenamerPass method rename.

public static void rename(AnalysisContext cxt, Map<MethodNode, String> remapped, boolean warn) {
    ApplicationClassSource source = cxt.getApplication();
    InvocationResolver resolver = cxt.getInvocationResolver();
    for (ClassNode cn : source.iterate()) {
        {
            if (cn.outerMethod != null) {
                // ClassNode owner = tree.getClass(cn.outerClass);
                System.out.println("Outer: " + cn.outerClass + "." + cn.outerMethod + " " + cn.outerMethodDesc);
                cn.outerClass = null;
                cn.outerMethod = null;
                cn.outerMethodDesc = null;
            // System.out.println(owner.name);
            // do {
            // for(MethodNode m : owner.methods) {
            // System.out.println(m);
            // if(m.name.equals(cn.outerMethod) && m.desc.equals(cn.outerMethodDesc)) {
            // System.out.println("m: " + m);
            // }
            // }
            // owner = tree.getClass(owner.superName);
            // System.out.println(cn.superName);
            // System.out.println(owner);
            // } while(owner != null);
            }
        }
        Set<Expr> visited = new HashSet<>();
        for (MethodNode m : cn.methods) {
            ControlFlowGraph cfg = cxt.getIRCache().getFor(m);
            for (BasicBlock b : cfg.vertices()) {
                for (Stmt stmt : b) {
                    for (Expr e : stmt.enumerateOnlyChildren()) {
                        if (e.getOpcode() == Opcode.INVOKE) {
                            InvocationExpr invoke = (InvocationExpr) e;
                            if (visited.contains(invoke)) {
                                throw new RuntimeException(invoke.toString());
                            }
                            visited.add(invoke);
                            if (invoke.getOwner().startsWith("[")) {
                                System.err.println("  ignore array object invoke: " + invoke + ", owner: " + invoke.getOwner());
                                continue;
                            }
                            if (invoke.isStatic()) {
                                MethodNode site = resolver.resolveStaticCall(invoke.getOwner(), invoke.getName(), invoke.getDesc());
                                if (site != null) {
                                    if (remapped.containsKey(site)) {
                                        invoke.setName(remapped.get(site));
                                    } else {
                                        if (warn && mustMark(source, invoke.getOwner())) {
                                            System.err.println("  invalid site(s): " + invoke);
                                        }
                                    }
                                } else {
                                    if (mustMark(source, invoke.getOwner())) {
                                        System.err.printf("  can't resolve(s) %s ; %s.%s %s%n", invoke, invoke.getOwner(), invoke.getName(), invoke.getDesc());
                                        if (invoke.getOwner().equals("hey")) {
                                            for (MethodNode mm : cxt.getApplication().findClassNode(invoke.getOwner()).methods) {
                                                System.out.println(mm);
                                            }
                                            throw new UnsupportedOperationException();
                                        }
                                    }
                                }
                            } else {
                                // Set<MethodNode> sites = resolver.resolveVirtualCalls(invoke.getOwner(), invoke.getName(), invoke.getDesc());
                                // Set<ClassNode> classes = source.getStructures().dfsTree(cn, true, true, true);
                                // Set<MethodNode> sites = getVirtualMethods(cxt, classes, invoke.getName(), invoke.getDesc());
                                Set<MethodNode> sites = resolver.getHierarchyMethodChain(source.findClassNode(invoke.getOwner()), invoke.getName(), invoke.getDesc(), true);
                                if (sites.size() > 0) {
                                    /* all of the sites must be linked by the same name,
										 * so we can use any to find the new name. */
                                    boolean anyContains = false;
                                    boolean allContains = true;
                                    for (MethodNode s : sites) {
                                        anyContains |= remapped.containsKey(s);
                                        allContains &= remapped.containsKey(s);
                                    }
                                    if (anyContains && !allContains) {
                                        System.err.println("mismatch: ");
                                        // System.err.println(classes);
                                        System.err.println(sites);
                                        throw new RuntimeException();
                                    }
                                    MethodNode site = sites.iterator().next();
                                    if (remapped.containsKey(site)) {
                                        invoke.setName(remapped.get(site));
                                    } else {
                                        if (warn && !site.name.equals("<init>") && canRename(cxt, sites)) {
                                            System.err.println("  invalid site(v): " + invoke + ", " + sites);
                                        }
                                    }
                                } else {
                                    if (mustMark(source, invoke.getOwner())) {
                                        System.err.println("  can't resolve(v) " + invoke + ", owner: " + invoke.getOwner() + " desc " + invoke.getDesc());
                                    // System.err.println("  classes: " + classes);
                                    }
                                }
                            }
                        } else if (e.getOpcode() == Opcode.DYNAMIC_INVOKE) {
                            throw new UnsupportedOperationException();
                        }
                    }
                }
            }
        }
    }
    /* Rename the methods after as we need to resolve
		 * them using the old names during the invocation 
		 * analysis above. */
    for (Entry<MethodNode, String> e : remapped.entrySet()) {
        // System.out.printf("%s -> %s%n", e.getKey(), e.getValue());
        e.getKey().name = e.getValue();
    }
}

Example 34 with Stmt

use of org.mapleir.ir.code.Stmt in project maple-ir by LLVM-but-worse.

the class SSAGenPass method updatePhiArgTypes.

private void updatePhiArgTypes(Set<BasicBlock> vis) {
    // update types for phi args
    for (BasicBlock b : order) {
        for (Stmt s : b) {
            if (s.getOpcode() != Opcode.PHI_STORE) {
                break;
            }
            CopyPhiStmt cps = (CopyPhiStmt) s;
            for (Entry<BasicBlock, Expr> e : cps.getExpression().getArguments().entrySet()) {
                BasicBlock src = e.getKey();
                if (vis.contains(src))
                    continue;
                VarExpr v = (VarExpr) e.getValue();
                Local l = v.getLocal();
                // what if the def is never reached?
                AbstractCopyStmt def = pool.defs.get(l);
                v.setType(def.getType());
            }
        }
    }
}

Example 35 with Stmt

use of org.mapleir.ir.code.Stmt in project maple-ir by LLVM-but-worse.

the class SSAGenPass method insertPhis.

private void insertPhis(BasicBlock b, Local l, int i, LinkedList<BasicBlock> queue) {
    if (b == null || b == builder.head) {
        // exit
        return;
    }
    Local newl = builder.graph.getLocals().get(l.getIndex(), 0, l.isStack());
    for (BasicBlock x : doms.iteratedFrontier(b)) {
        if (insertion.get(x) < i) {
            // pruned SSA
            if (liveness.in(x).contains(l)) {
                if ((l == svar0) && handlers.contains(x)) /* == faster than contains. */
                {
                    /* Note: this is quite subtle. Since there is a
						 * copy, (svar0 = catch()) at the start of each
						 * handler block, technically any natural flowing
						 * svar0 definition is killed upon entry to the
						 * block, so it is not considered live. One way to
						 * check if the variable is live-in, therefore, is
						 * by checking whether svar0 is live-out of the
						 * catch() definition. We handle it here, since
						 * the previous liveness check which is used for
						 * pruned SSA will fail in this case. */
                    /* Ok fuck that that, it's considered live-in
						 * even if there is a catch()::
						 *  #see SSaBlockLivenessAnalyser.precomputeBlock*/
                    boolean naturalFlow = false;
                    for (FlowEdge<BasicBlock> e : builder.graph.getReverseEdges(x)) {
                        if (e.getType() != FlowEdges.TRYCATCH) {
                            naturalFlow = true;
                            break;
                        }
                    }
                    if (naturalFlow) {
                        CopyVarStmt catcher = null;
                        for (Stmt stmt : x) {
                            if (stmt.getOpcode() == Opcode.LOCAL_STORE) {
                                CopyVarStmt copy = (CopyVarStmt) stmt;
                                Expr e = copy.getExpression();
                                if (e.getOpcode() == Opcode.CATCH) {
                                    catcher = copy;
                                    break;
                                }
                            }
                        }
                        if (catcher == null) {
                            /* Handler but no catch copy?
								 * This can't happen since svar0 is
								 * the only reserved register for
								 * catch copies, and this block cannot
								 * be visited twice to insert a phi or
								 * psi(ephi) node. */
                            throw new IllegalStateException(x.getDisplayName());
                        }
                        /* Map<BasicBlock, Expression> vls = new HashMap<>();
							for(FlowEdge<BasicBlock> fe : builder.graph.getReverseEdges(x)) {
								vls.put(fe.src, new VarExpr(newl, null));
							}
							vls.put(x, catcher.getExpression().copy());
							catcher.delete();
							
							PhiExpr phi = new PhiExceptionExpr(vls);
							CopyPhiStmt assign = new CopyPhiStmt(new VarExpr(l, null), phi);
							
							x.add(0, assign); */
                        throw new UnsupportedOperationException(builder.method.toString());
                    }
                }
                if (builder.graph.getReverseEdges(x).size() > 1) {
                    Map<BasicBlock, Expr> vls = new HashMap<>();
                    for (FlowEdge<BasicBlock> fe : builder.graph.getReverseEdges(x)) {
                        vls.put(fe.src(), new VarExpr(newl, null));
                    }
                    PhiExpr phi = new PhiExpr(vls);
                    CopyPhiStmt assign = new CopyPhiStmt(new VarExpr(l, null), phi);
                    x.add(0, assign);
                }
            }
            insertion.put(x, i);
            if (process.get(x) < i) {
                process.put(x, i);
                queue.add(x);
            }
        }
    }
}