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-rw-r--r--js/src/jsapi-tests/testChromeBuffer.cpp257
1 files changed, 257 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testChromeBuffer.cpp b/js/src/jsapi-tests/testChromeBuffer.cpp
new file mode 100644
index 0000000000..251d6a18ad
--- /dev/null
+++ b/js/src/jsapi-tests/testChromeBuffer.cpp
@@ -0,0 +1,257 @@
+/* -*- 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 "mozilla/Utf8.h" // mozilla::Utf8Unit
+
+#include "js/CallAndConstruct.h" // JS_CallFunctionValue
+#include "js/CompilationAndEvaluation.h" // JS::CompileFunction
+#include "js/ContextOptions.h"
+#include "js/GlobalObject.h" // JS_NewGlobalObject
+#include "js/PropertyAndElement.h" // JS_DefineProperty
+#include "js/SourceText.h" // JS::Source{Ownership,Text}
+#include "jsapi-tests/tests.h"
+#include "util/Text.h"
+
+static TestJSPrincipals system_principals(1);
+
+static const JSClass global_class = {"global",
+ JSCLASS_IS_GLOBAL | JSCLASS_GLOBAL_FLAGS,
+ &JS::DefaultGlobalClassOps};
+
+static JS::PersistentRootedObject trusted_glob;
+static JS::PersistentRootedObject trusted_fun;
+
+static bool CallTrusted(JSContext* cx, unsigned argc, JS::Value* vp) {
+ JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
+
+ bool ok = false;
+ {
+ JSAutoRealm ar(cx, trusted_glob);
+ JS::RootedValue funVal(cx, JS::ObjectValue(*trusted_fun));
+ ok = JS_CallFunctionValue(cx, nullptr, funVal,
+ JS::HandleValueArray::empty(), args.rval());
+ }
+ return ok;
+}
+
+BEGIN_TEST(testChromeBuffer) {
+ JS_SetTrustedPrincipals(cx, &system_principals);
+
+ JS::RealmOptions options;
+ trusted_glob.init(cx,
+ JS_NewGlobalObject(cx, &global_class, &system_principals,
+ JS::FireOnNewGlobalHook, options));
+ CHECK(trusted_glob);
+
+ JS::RootedFunction fun(cx);
+
+ /*
+ * Check that, even after untrusted content has exhausted the stack, code
+ * compiled with "trusted principals" can run using reserved trusted-only
+ * buffer space.
+ */
+ {
+ // Disable the JIT because if we don't this test fails. See bug 1160414.
+ uint32_t oldBaselineInterpreterEnabled;
+ CHECK(JS_GetGlobalJitCompilerOption(
+ cx, JSJITCOMPILER_BASELINE_INTERPRETER_ENABLE,
+ &oldBaselineInterpreterEnabled));
+ JS_SetGlobalJitCompilerOption(cx, JSJITCOMPILER_BASELINE_INTERPRETER_ENABLE,
+ 0);
+ uint32_t oldBaselineJitEnabled;
+ CHECK(JS_GetGlobalJitCompilerOption(cx, JSJITCOMPILER_BASELINE_ENABLE,
+ &oldBaselineJitEnabled));
+ JS_SetGlobalJitCompilerOption(cx, JSJITCOMPILER_BASELINE_ENABLE, 0);
+ {
+ JSAutoRealm ar(cx, trusted_glob);
+ const char* paramName = "x";
+ static const char bytes[] = "return x ? 1 + trusted(x-1) : 0";
+
+ JS::SourceText<mozilla::Utf8Unit> srcBuf;
+ CHECK(srcBuf.init(cx, bytes, js_strlen(bytes),
+ JS::SourceOwnership::Borrowed));
+
+ JS::CompileOptions options(cx);
+ options.setFileAndLine("", 0);
+
+ JS::RootedObjectVector emptyScopeChain(cx);
+ fun = JS::CompileFunction(cx, emptyScopeChain, options, "trusted", 1,
+ &paramName, srcBuf);
+ CHECK(fun);
+ CHECK(JS_DefineProperty(cx, trusted_glob, "trusted", fun,
+ JSPROP_ENUMERATE));
+ trusted_fun.init(cx, JS_GetFunctionObject(fun));
+ }
+
+ JS::RootedValue v(cx, JS::ObjectValue(*trusted_fun));
+ CHECK(JS_WrapValue(cx, &v));
+
+ const char* paramName = "trusted";
+ static const char bytes[] =
+ "try { "
+ " return untrusted(trusted); "
+ "} catch (e) { "
+ " try { "
+ " return trusted(100); "
+ " } catch(e) { "
+ " return -1; "
+ " } "
+ "} ";
+
+ JS::SourceText<mozilla::Utf8Unit> srcBuf;
+ CHECK(srcBuf.init(cx, bytes, js_strlen(bytes),
+ JS::SourceOwnership::Borrowed));
+
+ JS::CompileOptions options(cx);
+ options.setFileAndLine("", 0);
+
+ JS::RootedObjectVector emptyScopeChain(cx);
+ fun = JS::CompileFunction(cx, emptyScopeChain, options, "untrusted", 1,
+ &paramName, srcBuf);
+ CHECK(fun);
+ CHECK(JS_DefineProperty(cx, global, "untrusted", fun, JSPROP_ENUMERATE));
+
+ JS::RootedValue rval(cx);
+ CHECK(JS_CallFunction(cx, nullptr, fun, JS::HandleValueArray(v), &rval));
+ CHECK(rval.toInt32() == 100);
+ JS_SetGlobalJitCompilerOption(cx, JSJITCOMPILER_BASELINE_INTERPRETER_ENABLE,
+ oldBaselineInterpreterEnabled);
+ JS_SetGlobalJitCompilerOption(cx, JSJITCOMPILER_BASELINE_ENABLE,
+ oldBaselineJitEnabled);
+ }
+
+ /*
+ * Check that content called from chrome in the reserved-buffer space
+ * immediately ooms.
+ */
+ {
+ {
+ JSAutoRealm ar(cx, trusted_glob);
+
+ const char* paramName = "untrusted";
+ static const char bytes[] =
+ "try { "
+ " untrusted(); "
+ "} catch (e) { "
+ " /* "
+ " * Careful! We must not reenter JS "
+ " * that might try to push a frame. "
+ " */ "
+ " return 'From trusted: ' + "
+ " e.name + ': ' + e.message; "
+ "} ";
+
+ JS::SourceText<mozilla::Utf8Unit> srcBuf;
+ CHECK(srcBuf.init(cx, bytes, js_strlen(bytes),
+ JS::SourceOwnership::Borrowed));
+
+ JS::CompileOptions options(cx);
+ options.setFileAndLine("", 0);
+
+ JS::RootedObjectVector emptyScopeChain(cx);
+ fun = JS::CompileFunction(cx, emptyScopeChain, options, "trusted", 1,
+ &paramName, srcBuf);
+ CHECK(fun);
+ CHECK(JS_DefineProperty(cx, trusted_glob, "trusted", fun,
+ JSPROP_ENUMERATE));
+ trusted_fun = JS_GetFunctionObject(fun);
+ }
+
+ JS::RootedValue v(cx, JS::ObjectValue(*trusted_fun));
+ CHECK(JS_WrapValue(cx, &v));
+
+ const char* paramName = "trusted";
+ static const char bytes[] =
+ "try { "
+ " return untrusted(trusted); "
+ "} catch (e) { "
+ " return trusted(untrusted); "
+ "} ";
+
+ JS::SourceText<mozilla::Utf8Unit> srcBuf;
+ CHECK(srcBuf.init(cx, bytes, js_strlen(bytes),
+ JS::SourceOwnership::Borrowed));
+
+ JS::CompileOptions options(cx);
+ options.setFileAndLine("", 0);
+
+ JS::RootedObjectVector emptyScopeChain(cx);
+ fun = JS::CompileFunction(cx, emptyScopeChain, options, "untrusted", 1,
+ &paramName, srcBuf);
+ CHECK(fun);
+ CHECK(JS_DefineProperty(cx, global, "untrusted", fun, JSPROP_ENUMERATE));
+
+ JS::RootedValue rval(cx);
+ CHECK(JS_CallFunction(cx, nullptr, fun, JS::HandleValueArray(v), &rval));
+#ifndef JS_SIMULATOR_ARM64
+ // The ARM64 simulator does not share a common implementation with the other
+ // simulators, and has slightly different end-of-stack behavior. Instead of
+ // failing with "too much recursion," it executes one more function call and
+ // fails with a type error. This behavior is not incorrect.
+ bool match;
+ CHECK(JS_StringEqualsAscii(
+ cx, rval.toString(), "From trusted: InternalError: too much recursion",
+ &match));
+ CHECK(match);
+#endif
+ }
+
+ {
+ {
+ JSAutoRealm ar(cx, trusted_glob);
+
+ static const char bytes[] = "return 42";
+
+ JS::SourceText<mozilla::Utf8Unit> srcBuf;
+ CHECK(srcBuf.init(cx, bytes, js_strlen(bytes),
+ JS::SourceOwnership::Borrowed));
+
+ JS::CompileOptions options(cx);
+ options.setFileAndLine("", 0);
+
+ JS::RootedObjectVector emptyScopeChain(cx);
+ fun = JS::CompileFunction(cx, emptyScopeChain, options, "trusted", 0,
+ nullptr, srcBuf);
+ CHECK(fun);
+ CHECK(JS_DefineProperty(cx, trusted_glob, "trusted", fun,
+ JSPROP_ENUMERATE));
+ trusted_fun = JS_GetFunctionObject(fun);
+ }
+
+ JS::RootedFunction fun(
+ cx, JS_NewFunction(cx, CallTrusted, 0, 0, "callTrusted"));
+ JS::RootedObject callTrusted(cx, JS_GetFunctionObject(fun));
+
+ const char* paramName = "f";
+ static const char bytes[] =
+ "try { "
+ " return untrusted(trusted); "
+ "} catch (e) { "
+ " return f(); "
+ "} ";
+
+ JS::SourceText<mozilla::Utf8Unit> srcBuf;
+ CHECK(srcBuf.init(cx, bytes, js_strlen(bytes),
+ JS::SourceOwnership::Borrowed));
+
+ JS::CompileOptions options(cx);
+ options.setFileAndLine("", 0);
+
+ JS::RootedObjectVector emptyScopeChain(cx);
+ fun = JS::CompileFunction(cx, emptyScopeChain, options, "untrusted", 1,
+ &paramName, srcBuf);
+ CHECK(fun);
+ CHECK(JS_DefineProperty(cx, global, "untrusted", fun, JSPROP_ENUMERATE));
+
+ JS::RootedValue arg(cx, JS::ObjectValue(*callTrusted));
+ JS::RootedValue rval(cx);
+ CHECK(JS_CallFunction(cx, nullptr, fun, JS::HandleValueArray(arg), &rval));
+ CHECK(rval.toInt32() == 42);
+ }
+
+ return true;
+}
+END_TEST(testChromeBuffer)
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-20 09:51:22 +0000