Ryan Macnak
e2f99e4cee
Also, remove paranoid checks from ProfilerDartStackWalker by - setting the VM tag to Dart only after initializing the exit slot - setting the VM tag to Runtime for leaf runtime function - bailing out when in the prologue of the invocation stub's callee Change-Id: Ifd1caee2203f8863b17fc7d0072de32290fd0e60 Reviewed-on: https://dart-review.googlesource.com/c/84140 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Régis Crelier <regis@google.com>
66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
|
|
#include "vm/globals.h"
|
|
#if defined(TARGET_ARCH_ARM)
|
|
|
|
#include "vm/runtime_entry.h"
|
|
|
|
#include "vm/compiler/assembler/assembler.h"
|
|
#include "vm/simulator.h"
|
|
#include "vm/stub_code.h"
|
|
|
|
namespace dart {
|
|
|
|
#define __ assembler->
|
|
|
|
uword RuntimeEntry::GetEntryPoint() const {
|
|
// Compute the effective address. When running under the simulator,
|
|
// this is a redirection address that forces the simulator to call
|
|
// into the runtime system.
|
|
uword entry = reinterpret_cast<uword>(function());
|
|
#if defined(USING_SIMULATOR)
|
|
// Redirection to leaf runtime calls supports a maximum of 4 arguments passed
|
|
// in registers (maximum 2 double arguments for leaf float runtime calls).
|
|
ASSERT(argument_count() >= 0);
|
|
ASSERT(!is_leaf() || (!is_float() && (argument_count() <= 4)) ||
|
|
(argument_count() <= 2));
|
|
Simulator::CallKind call_kind =
|
|
is_leaf() ? (is_float() ? Simulator::kLeafFloatRuntimeCall
|
|
: Simulator::kLeafRuntimeCall)
|
|
: Simulator::kRuntimeCall;
|
|
entry =
|
|
Simulator::RedirectExternalReference(entry, call_kind, argument_count());
|
|
#endif
|
|
return entry;
|
|
}
|
|
|
|
#if !defined(DART_PRECOMPILED_RUNTIME)
|
|
// Generate code to call into the stub which will call the runtime
|
|
// function. Input for the stub is as follows:
|
|
// SP : points to the arguments and return value array.
|
|
// R9 : address of the runtime function to call.
|
|
// R4 : number of arguments to the call.
|
|
void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const {
|
|
if (is_leaf()) {
|
|
ASSERT(argument_count == this->argument_count());
|
|
__ LoadFromOffset(kWord, TMP, THR, Thread::OffsetFromThread(this));
|
|
__ str(TMP, Address(THR, Thread::vm_tag_offset()));
|
|
__ blx(TMP);
|
|
__ LoadImmediate(TMP, VMTag::kDartCompiledTagId);
|
|
__ str(TMP, Address(THR, Thread::vm_tag_offset()));
|
|
} else {
|
|
// Argument count is not checked here, but in the runtime entry for a more
|
|
// informative error message.
|
|
__ LoadFromOffset(kWord, R9, THR, Thread::OffsetFromThread(this));
|
|
__ LoadImmediate(R4, argument_count);
|
|
__ BranchLinkToRuntime();
|
|
}
|
|
}
|
|
#endif // !defined(DART_PRECOMPILED_RUNTIME)
|
|
|
|
} // namespace dart
|
|
|
|
#endif // defined TARGET_ARCH_ARM
|