[inspector] [wasm] Implement GetPossibleBreakpoints

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 8990 matching lines @@
   return i::Smi::cast(array->get(index))->value();
 }
 }  // namespace
 
 bool DebugInterface::Script::GetPossibleBreakpoints(
     const Location& start, const Location& end,
     std::vector<Location>* locations) const {
   CHECK(!start.IsEmpty());
   i::Handle<i::Script> script = Utils::OpenHandle(this);
   if (script->type() == i::Script::TYPE_WASM) {
-    // TODO(clemensh): Return the proper thing once we support wasm breakpoints.
-    return false;
+    i::Handle<i::WasmCompiledModule> compiled_module(
+        i::WasmCompiledModule::cast(script->wasm_compiled_module()));
+    return compiled_module->GetPossibleBreakpoints(start, end, locations);
   }
 
   i::Script::InitLineEnds(script);
   CHECK(script->line_ends()->IsFixedArray());
   i::Isolate* isolate = script->GetIsolate();
   i::Handle<i::FixedArray> line_ends =
       i::Handle<i::FixedArray>::cast(i::handle(script->line_ends(), isolate));
   CHECK(line_ends->length());
 
   int start_offset = GetSourcePosition(start);
@@ skipping 97 matching lines @@
 int DebugInterface::WasmScript::NumImportedFunctions() const {
   i::DisallowHeapAllocation no_gc;
   i::Handle<i::Script> script = Utils::OpenHandle(this);
   DCHECK_EQ(i::Script::TYPE_WASM, script->type());
   i::WasmCompiledModule* compiled_module =
       i::WasmCompiledModule::cast(script->wasm_compiled_module());
   DCHECK_GE(i::kMaxInt, compiled_module->module()->num_imported_functions);
   return static_cast<int>(compiled_module->module()->num_imported_functions);
 }
 
+std::pair<int, int> DebugInterface::WasmScript::GetFunctionRange(
+    int function_index) const {
+  i::DisallowHeapAllocation no_gc;
+  i::Handle<i::Script> script = Utils::OpenHandle(this);
+  DCHECK_EQ(i::Script::TYPE_WASM, script->type());
+  i::WasmCompiledModule* compiled_module =
+      i::WasmCompiledModule::cast(script->wasm_compiled_module());
+  DCHECK_LE(0, function_index);
+  DCHECK_GT(compiled_module->module()->functions.size(), function_index);
+  i::wasm::WasmFunction& func =
+      compiled_module->module()->functions[function_index];
+  DCHECK_GE(i::kMaxInt, func.code_start_offset);
+  DCHECK_GE(i::kMaxInt, func.code_end_offset);
+  return std::make_pair(static_cast<int>(func.code_start_offset),
+                        static_cast<int>(func.code_end_offset));
+}
+
 std::pair<std::string, std::vector<std::tuple<uint32_t, int, int>>>
 DebugInterface::WasmScript::DisassembleFunction(int function_index) {
   i::DisallowHeapAllocation no_gc;
   i::Handle<i::Script> script = Utils::OpenHandle(this);
   DCHECK_EQ(i::Script::TYPE_WASM, script->type());
   i::WasmCompiledModule* compiled_module =
       i::WasmCompiledModule::cast(script->wasm_compiled_module());
   return compiled_module->DisassembleFunction(function_index);
 }
 
@@ skipping 742 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8