[wasm] Implement GetPossibleBreakpoints

test/cctest/wasm/test-wasm-breakpoints.cc

+// Copyright 2016 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/debug/debug-interface.h"
+#include "src/wasm/wasm-macro-gen.h"
+#include "src/wasm/wasm-objects.h"
+
+#include "test/cctest/cctest.h"
+#include "test/cctest/compiler/value-helper.h"
+#include "test/cctest/wasm/wasm-run-utils.h"
+#include "test/common/wasm/test-signatures.h"
+
+using namespace v8::internal;
+using namespace v8::internal::wasm;
+namespace debug = v8::debug;
+
+namespace {
+
+void CheckLocations(
+    WasmCompiledModule *compiled_module, debug::Location start,
+    debug::Location end,
+    std::initializer_list<debug::Location> expected_locations_init) {
+  std::vector<debug::Location> locations;
+  bool success =
+      compiled_module->GetPossibleBreakpoints(start, end, &locations);
+  CHECK(success);
+
+  printf("got %d locations: ", static_cast<int>(locations.size()));
+  for (size_t i = 0, e = locations.size(); i != e; ++i) {
+    printf("%s<%d,%d>", i == 0 ? "" : ", ", locations[i].GetLineNumber(),
+           locations[i].GetColumnNumber());
+  }
+  printf("\n");
+
+  std::vector<debug::Location> expected_locations(expected_locations_init);
+  CHECK_EQ(expected_locations.size(), locations.size());
+  for (size_t i = 0, e = locations.size(); i != e; ++i) {
+    CHECK_EQ(expected_locations[i].GetLineNumber(),
+             locations[i].GetLineNumber());
+    CHECK_EQ(expected_locations[i].GetColumnNumber(),
+             locations[i].GetColumnNumber());
+  }
+}
+void CheckLocationsFail(WasmCompiledModule *compiled_module,
+                        debug::Location start, debug::Location end) {
+  std::vector<debug::Location> locations;
+  bool success =
+      compiled_module->GetPossibleBreakpoints(start, end, &locations);
+  CHECK(!success);
+}
+
+}  // namespace
+
+TEST(CollectPossibleBreakpoints) {
+  WasmRunner<int> runner(kExecuteCompiled);
+
+  BUILD(runner, WASM_NOP, WASM_I32_ADD(WASM_ZERO, WASM_ONE));
+
+  Handle<WasmInstanceObject> instance = runner.module().instance_object();
+  std::vector<debug::Location> locations;
+  CheckLocations(instance->get_compiled_module(), {0, 0}, {1, 0},
+                 {{0, 1}, {0, 2}, {0, 4}, {0, 6}});
+  CheckLocations(instance->get_compiled_module(), {0, 2}, {0, 4}, {{0, 2}});
+  CheckLocations(instance->get_compiled_module(), {0, 2}, {0, 5},
+                 {{0, 2}, {0, 4}});
+  CheckLocations(instance->get_compiled_module(), {0, 6}, {0, 7}, {{0, 6}});
+  CheckLocations(instance->get_compiled_module(), {0, 6}, {1, 0}, {{0, 6}});
+  CheckLocations(instance->get_compiled_module(), {0, 7}, {1, 0}, {});
+  CheckLocationsFail(instance->get_compiled_module(), {0, 8}, {1, 0});
+}