Experimenting with instrument API. Not quite right.

src/alloy/runtime/instrument.cc

@@ -0,0 +1,122 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2014 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <alloy/runtime/instrument.h>
+
+#include <alloy/memory.h>
+#include <alloy/runtime/function.h>
+#include <alloy/runtime/runtime.h>
+
+using namespace alloy;
+using namespace alloy::runtime;
+
+
+
+Instrument::Instrument(Runtime* runtime) :
+    runtime_(runtime),
+    memory_(runtime->memory()),
+    is_attached_(false) {
+}
+
+Instrument::~Instrument() {
+  if (is_attached_) {
+    Detach();
+  }
+}
+
+bool Instrument::Attach() {
+  if (is_attached_) {
+    return false;
+  }
+  //runtime->AttachInstrument(this);
+  is_attached_ = true;
+  return true;
+}
+
+bool Instrument::Detach() {
+  if (!is_attached_) {
+    return false;
+  }
+  is_attached_ = false;
+  //runtime->DetachInstrument(this);
+  return true;
+}
+
+
+FunctionInstrument::FunctionInstrument(
+    Runtime* runtime, Function* function) :
+    target_(function),
+    Instrument(runtime) {
+}
+
+bool FunctionInstrument::Attach() {
+  if (!Instrument::Attach()) {
+    return false;
+  }
+
+  // Function impl attach:
+  // - add instrument to list
+  // IVM: handle in Call()
+  // JIT: transition to instrumented state
+  //      - rewrite enter/exit to jump to instrumentation thunk
+  //      - some sort of locking required?
+
+  return true;
+}
+
+bool FunctionInstrument::Detach() {
+  if (!Instrument::Detach()) {
+    return false;
+  }
+
+  //
+
+  return true;
+}
+
+void FunctionInstrument::Enter(ThreadState* thread_state) {
+  // ? Placement new? How to get instance type?
+}
+
+void FunctionInstrument::Exit(ThreadState* thread_state) {
+  //
+}
+
+
+MemoryInstrument::MemoryInstrument(
+    Runtime* runtime, uint64_t address, uint64_t end_address) :
+    address_(address), end_address_(end_address),
+    Instrument(runtime) {
+}
+
+bool MemoryInstrument::Attach() {
+  if (!Instrument::Attach()) {
+    return false;
+  }
+
+  // TODO(benvanik): protect memory page, catch exception
+  // https://github.com/frida/frida-gum/blob/master/gum/gummemoryaccessmonitor.c
+
+  return true;
+}
+
+bool MemoryInstrument::Detach() {
+  if (!Instrument::Detach()) {
+    return false;
+  }
+
+  //
+
+  return true;
+}
+
+void MemoryInstrument::Access(
+    ThreadState* thread_state, uint64_t address, AccessType type) {
+  // TODO(benvanik): get thread local instance
+}