ART: Add GetLineNumberTable
Add support for extracting a line number table. Add output to
stack trace test.
Bug: 31684812
Test: m test-art-host-run-test-911-get-stack-trace
Change-Id: Ief6ff566c35431333b51b551d9d511c7a47a05e7
diff --git a/runtime/openjdkjvmti/ti_method.cc b/runtime/openjdkjvmti/ti_method.cc
index ffa5ac7..a0a0923 100644
--- a/runtime/openjdkjvmti/ti_method.cc
+++ b/runtime/openjdkjvmti/ti_method.cc
@@ -130,4 +130,63 @@
return ERR(NONE);
}
+using LineNumberContext = std::vector<jvmtiLineNumberEntry>;
+
+static bool CollectLineNumbers(void* void_context, const art::DexFile::PositionInfo& entry) {
+ LineNumberContext* context = reinterpret_cast<LineNumberContext*>(void_context);
+ jvmtiLineNumberEntry jvmti_entry = { static_cast<jlocation>(entry.address_),
+ static_cast<jint>(entry.line_) };
+ context->push_back(jvmti_entry);
+ return false; // Collect all, no early exit.
+}
+
+jvmtiError MethodUtil::GetLineNumberTable(jvmtiEnv* env,
+ jmethodID method,
+ jint* entry_count_ptr,
+ jvmtiLineNumberEntry** table_ptr) {
+ if (method == nullptr) {
+ return ERR(NULL_POINTER);
+ }
+ art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
+ DCHECK(!art_method->IsRuntimeMethod());
+
+ const art::DexFile::CodeItem* code_item;
+ const art::DexFile* dex_file;
+ {
+ art::ScopedObjectAccess soa(art::Thread::Current());
+
+ if (art_method->IsProxyMethod()) {
+ return ERR(ABSENT_INFORMATION);
+ }
+ if (art_method->IsNative()) {
+ return ERR(NATIVE_METHOD);
+ }
+ if (entry_count_ptr == nullptr || table_ptr == nullptr) {
+ return ERR(NULL_POINTER);
+ }
+
+ code_item = art_method->GetCodeItem();
+ dex_file = art_method->GetDexFile();
+ DCHECK(code_item != nullptr) << art_method->PrettyMethod() << " " << dex_file->GetLocation();
+ }
+
+ LineNumberContext context;
+ bool success = dex_file->DecodeDebugPositionInfo(code_item, CollectLineNumbers, &context);
+ if (!success) {
+ return ERR(ABSENT_INFORMATION);
+ }
+
+ unsigned char* data;
+ jlong mem_size = context.size() * sizeof(jvmtiLineNumberEntry);
+ jvmtiError alloc_error = env->Allocate(mem_size, &data);
+ if (alloc_error != ERR(NONE)) {
+ return alloc_error;
+ }
+ *table_ptr = reinterpret_cast<jvmtiLineNumberEntry*>(data);
+ memcpy(*table_ptr, context.data(), mem_size);
+ *entry_count_ptr = static_cast<jint>(context.size());
+
+ return ERR(NONE);
+}
+
} // namespace openjdkjvmti