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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "js/UbiNodeShortestPaths.h"
#include "mozilla/Maybe.h"
#include <stdio.h>
#include <utility>
#include "util/Text.h"
namespace JS {
namespace ubi {
JS_PUBLIC_API BackEdge::Ptr BackEdge::clone() const {
auto clone = js::MakeUnique<BackEdge>();
if (!clone) {
return nullptr;
}
clone->predecessor_ = predecessor();
if (name()) {
clone->name_ = js::DuplicateString(name().get());
if (!clone->name_) {
return nullptr;
}
}
return clone;
}
#ifdef DEBUG
static int32_t js_fputs(const char16_t* s, FILE* f) {
while (*s != 0) {
if (fputwc(wchar_t(*s), f) == static_cast<wint_t>(WEOF)) {
return WEOF;
}
s++;
}
return 1;
}
static void dumpNode(const JS::ubi::Node& node) {
fprintf(stderr, " %p ", (void*)node.identifier());
js_fputs(node.typeName(), stderr);
if (node.coarseType() == JS::ubi::CoarseType::Object) {
if (const char* clsName = node.jsObjectClassName()) {
fprintf(stderr, " [object %s]", clsName);
}
}
fputc('\n', stderr);
}
JS_PUBLIC_API void dumpPaths(JSContext* cx, Node node,
uint32_t maxNumPaths /* = 10 */) {
JS::ubi::RootList rootList(cx, true);
auto [ok, nogc] = rootList.init();
MOZ_ASSERT(ok);
NodeSet targets;
ok = targets.putNew(node);
MOZ_ASSERT(ok);
auto paths = ShortestPaths::Create(cx, nogc, maxNumPaths, &rootList,
std::move(targets));
MOZ_ASSERT(paths.isSome());
int i = 0;
ok = paths->forEachPath(node, [&](Path& path) {
fprintf(stderr, "Path %d:\n", i++);
for (auto backEdge : path) {
dumpNode(backEdge->predecessor());
fprintf(stderr, " |\n");
fprintf(stderr, " |\n");
fprintf(stderr, " '");
const char16_t* name = backEdge->name().get();
if (!name) {
name = u"<no edge name>";
}
js_fputs(name, stderr);
fprintf(stderr, "'\n");
fprintf(stderr, " |\n");
fprintf(stderr, " V\n");
}
dumpNode(node);
fputc('\n', stderr);
return true;
});
MOZ_ASSERT(ok);
if (i == 0) {
fprintf(stderr, "No retaining paths found.\n");
}
}
#endif
} // namespace ubi
} // namespace JS
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