[wasm] Generate source position information

src/compiler/wasm-compiler.h

 // Copyright 2015 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.
 
 #ifndef V8_COMPILER_WASM_COMPILER_H_
 #define V8_COMPILER_WASM_COMPILER_H_
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
 // Do not include anything from src/compiler here!
 #include "src/wasm/wasm-opcodes.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
 namespace compiler {
 // Forward declarations for some compiler data structures.
 class Node;
 class JSGraph;
 class Graph;
 class Operator;
+class SourcePositionTable;
 }
 
 namespace wasm {
 // Forward declarations for some WASM data structures.
 struct ModuleEnv;
 struct WasmFunction;
 class ErrorThrower;
 
 // Expose {Node} and {Graph} opaquely as {wasm::TFNode} and {wasm::TFGraph}.
 typedef compiler::Node TFNode;
@@ skipping 17 matching lines @@
 // from JavaScript.
 Handle<JSFunction> CompileJSToWasmWrapper(
     Isolate* isolate, wasm::ModuleEnv* module, Handle<String> name,
     Handle<Code> wasm_code, Handle<JSObject> module_object, uint32_t index);
 
 // Abstracts details of building TurboFan graph nodes for WASM to separate
 // the WASM decoder from the internal details of TurboFan.
 class WasmTrapHelper;
 class WasmGraphBuilder {
  public:
-  WasmGraphBuilder(Zone* z, JSGraph* g, wasm::FunctionSig* function_signature);
+  WasmGraphBuilder(
+      Zone* z, JSGraph* g, wasm::FunctionSig* function_signature,
+      compiler::SourcePositionTable* source_position_table = nullptr);
 
   Node** Buffer(size_t count) {
     if (count > cur_bufsize_) {
       size_t new_size = count + cur_bufsize_ + 5;
       cur_buffer_ =
           reinterpret_cast<Node**>(zone_->New(new_size * sizeof(Node*)));
       cur_bufsize_ = new_size;
     }
     return cur_buffer_;
   }
@@ skipping 63 matching lines @@
   void set_module(wasm::ModuleEnv* module) { this->module_ = module; }
 
   void set_control_ptr(Node** control) { this->control_ = control; }
 
   void set_effect_ptr(Node** effect) { this->effect_ = effect; }
 
   wasm::FunctionSig* GetFunctionSignature() { return function_signature_; }
 
   void Int64LoweringForTesting();
 
+  void SetSourcePosition(Node* node, int position);
+
  private:
   static const int kDefaultBufferSize = 16;
   friend class WasmTrapHelper;
 
   Zone* zone_;
   JSGraph* jsgraph_;
   wasm::ModuleEnv* module_;
   Node* mem_buffer_;
   Node* mem_size_;
   Node* function_table_;
   Node** control_;
   Node** effect_;
   Node** cur_buffer_;
   size_t cur_bufsize_;
   Node* def_buffer_[kDefaultBufferSize];
 
   WasmTrapHelper* trap_;
   wasm::FunctionSig* function_signature_;
   SetOncePointer<const Operator> allocate_heap_number_operator_;
 
+  compiler::SourcePositionTable* source_position_table_ = nullptr;
+
   // Internal helper methods.
   JSGraph* jsgraph() { return jsgraph_; }
   Graph* graph();
 
   Node* String(const char* string);
   Node* MemBuffer(uint32_t offset);
   void BoundsCheckMem(MachineType memtype, Node* index, uint32_t offset);
 
   Node* MaskShiftCount32(Node* node);
   Node* MaskShiftCount64(Node* node);
@@ skipping 95 matching lines @@
     Node** buf = Buffer(new_count);
     if (buf != buffer) memcpy(buf, buffer, old_count * sizeof(Node*));
     return buf;
   }
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_