michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "jit/RematerializedFrame.h"
michael@0: #include "jit/IonFrames.h"
michael@0: 
michael@0: #include "vm/ArgumentsObject.h"
michael@0: 
michael@0: #include "jsscriptinlines.h"
michael@0: #include "jit/IonFrames-inl.h"
michael@0: 
michael@0: using namespace js;
michael@0: using namespace jit;
michael@0: 
michael@0: struct CopyValueToRematerializedFrame
michael@0: {
michael@0:     Value *slots;
michael@0: 
michael@0:     CopyValueToRematerializedFrame(Value *slots)
michael@0:       : slots(slots)
michael@0:     { }
michael@0: 
michael@0:     void operator()(const Value &v) {
michael@0:         *slots++ = v;
michael@0:     }
michael@0: };
michael@0: 
michael@0: RematerializedFrame::RematerializedFrame(JSContext *cx, uint8_t *top, InlineFrameIterator &iter)
michael@0:   : prevUpToDate_(false),
michael@0:     top_(top),
michael@0:     frameNo_(iter.frameNo()),
michael@0:     numActualArgs_(iter.numActualArgs()),
michael@0:     script_(iter.script())
michael@0: {
michael@0:     CopyValueToRematerializedFrame op(slots_);
michael@0:     iter.readFrameArgsAndLocals(cx, op, op, &scopeChain_, &returnValue_,
michael@0:                                 &argsObj_, &thisValue_, ReadFrame_Actuals);
michael@0: }
michael@0: 
michael@0: /* static */ RematerializedFrame *
michael@0: RematerializedFrame::New(JSContext *cx, uint8_t *top, InlineFrameIterator &iter)
michael@0: {
michael@0:     unsigned numFormals = iter.isFunctionFrame() ? iter.callee()->nargs() : 0;
michael@0:     size_t numBytes = sizeof(RematerializedFrame) +
michael@0:         (Max(numFormals, iter.numActualArgs()) +
michael@0:          iter.script()->nfixed()) * sizeof(Value) -
michael@0:         sizeof(Value); // 1 Value included in sizeof(RematerializedFrame)
michael@0: 
michael@0:     void *buf = cx->calloc_(numBytes);
michael@0:     if (!buf)
michael@0:         return nullptr;
michael@0: 
michael@0:     return new (buf) RematerializedFrame(cx, top, iter);
michael@0: }
michael@0: 
michael@0: CallObject &
michael@0: RematerializedFrame::callObj() const
michael@0: {
michael@0:     JS_ASSERT(hasCallObj());
michael@0: 
michael@0:     JSObject *scope = scopeChain();
michael@0:     while (!scope->is<CallObject>())
michael@0:         scope = scope->enclosingScope();
michael@0:     return scope->as<CallObject>();
michael@0: }
michael@0: 
michael@0: void
michael@0: RematerializedFrame::mark(JSTracer *trc)
michael@0: {
michael@0:     gc::MarkScriptRoot(trc, &script_, "remat ion frame script");
michael@0:     gc::MarkObjectRoot(trc, &scopeChain_, "remat ion frame scope chain");
michael@0:     gc::MarkValueRoot(trc, &returnValue_, "remat ion frame return value");
michael@0:     gc::MarkValueRoot(trc, &thisValue_, "remat ion frame this");
michael@0:     gc::MarkValueRootRange(trc, slots_, slots_ + numActualArgs_ + script_->nfixed(),
michael@0:                            "remat ion frame stack");
michael@0: }
michael@0: 
michael@0: void
michael@0: RematerializedFrame::dump()
michael@0: {
michael@0:     fprintf(stderr, " Rematerialized Optimized Frame%s\n", inlined() ? " (inlined)" : "");
michael@0:     if (isFunctionFrame()) {
michael@0:         fprintf(stderr, "  callee fun: ");
michael@0: #ifdef DEBUG
michael@0:         js_DumpObject(callee());
michael@0: #else
michael@0:         fprintf(stderr, "?\n");
michael@0: #endif
michael@0:     } else {
michael@0:         fprintf(stderr, "  global frame, no callee\n");
michael@0:     }
michael@0: 
michael@0:     fprintf(stderr, "  file %s line %u\n",
michael@0:             script()->filename(), (unsigned) script()->lineno());
michael@0: 
michael@0:     fprintf(stderr, "  script = %p\n", (void*) script());
michael@0: 
michael@0:     if (isFunctionFrame()) {
michael@0:         fprintf(stderr, "  scope chain: ");
michael@0: #ifdef DEBUG
michael@0:         js_DumpObject(scopeChain());
michael@0: #else
michael@0:         fprintf(stderr, "?\n");
michael@0: #endif
michael@0: 
michael@0:         if (hasArgsObj()) {
michael@0:             fprintf(stderr, "  args obj: ");
michael@0: #ifdef DEBUG
michael@0:             js_DumpObject(&argsObj());
michael@0: #else
michael@0:             fprintf(stderr, "?\n");
michael@0: #endif
michael@0:         }
michael@0: 
michael@0:         fprintf(stderr, "  this: ");
michael@0: #ifdef DEBUG
michael@0:         js_DumpValue(thisValue());
michael@0: #else
michael@0:         fprintf(stderr, "?\n");
michael@0: #endif
michael@0: 
michael@0:         for (unsigned i = 0; i < numActualArgs(); i++) {
michael@0:             if (i < numFormalArgs())
michael@0:                 fprintf(stderr, "  formal (arg %d): ", i);
michael@0:             else
michael@0:                 fprintf(stderr, "  overflown (arg %d): ", i);
michael@0: #ifdef DEBUG
michael@0:             js_DumpValue(argv()[i]);
michael@0: #else
michael@0:             fprintf(stderr, "?\n");
michael@0: #endif
michael@0:         }
michael@0: 
michael@0:         for (unsigned i = 0; i < script()->nfixed(); i++) {
michael@0:             fprintf(stderr, "  local %d: ", i);
michael@0: #ifdef DEBUG
michael@0:             js_DumpValue(locals()[i]);
michael@0: #else
michael@0:             fprintf(stderr, "?\n");
michael@0: #endif
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     fputc('\n', stderr);
michael@0: }