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[vm/bytecode] Fix clobbering of exception handler types in bytecode reader.

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This fixes service/pause_on_unhandled_async_exceptions_test in compiled bytecode
mode, but not yet in interpreted bytecode mode.
Improve debugger verbosity.

Change-Id: I89e32179b0a3f043716d5117f958bf6a0de3ccac
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/116483
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
This commit is contained in:
Régis Crelier 2019-09-10 02:03:39 +00:00 committed by commit-bot@chromium.org
parent b4724c1d78
commit 9fccb5120b
3 changed files with 15 additions and 4 deletions
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8
runtime/vm/compiler/frontend/bytecode_reader.cc
View file

@ -945,7 +945,7 @@ void BytecodeReaderHelper::ReadExceptionsTable(const Bytecode& bytecode,
if (try_block_count > 0) {
const ObjectPool& pool = ObjectPool::Handle(Z, bytecode.object_pool());
AbstractType& handler_type = AbstractType::Handle(Z);
Array& handler_types = Array::ZoneHandle(Z);
Array& handler_types = Array::Handle(Z);
DescriptorList* pc_descriptors_list = new (Z) DescriptorList(64);
ExceptionHandlerList* exception_handlers_list =
new (Z) ExceptionHandlerList();
@ -986,9 +986,13 @@ void BytecodeReaderHelper::ReadExceptionsTable(const Bytecode& bytecode,
DeoptId::kNone,
TokenPosition::kNoSource, -1);
// The exception handler keeps a zone handle of the types array, rather
// than a raw pointer. Do not share the handle across iterations to avoid
// clobbering the array.
exception_handlers_list->AddHandler(
try_index, outer_try_index, handler_pc, TokenPosition::kNoSource,
is_generated, handler_types, needs_stacktrace);
is_generated, Array::ZoneHandle(Z, handler_types.raw()),
needs_stacktrace);
}
const PcDescriptors& descriptors = PcDescriptors::Handle(
Z, pc_descriptors_list->FinalizePcDescriptors(bytecode.PayloadStart()));

10
runtime/vm/debugger.cc
View file

@ -1184,6 +1184,10 @@ ActivationFrame* DebuggerStackTrace::GetHandlerFrame(
const Instance& exc_obj) const {
for (intptr_t frame_index = 0; frame_index < Length(); frame_index++) {
ActivationFrame* frame = FrameAt(frame_index);
if (FLAG_trace_debugger_stacktrace) {
OS::PrintErr("GetHandlerFrame: #%04" Pd " %s", frame_index,
frame->ToCString());
}
if (frame->HandlesException(exc_obj)) {
return frame;
}
@ -1606,6 +1610,10 @@ RawTypeArguments* ActivationFrame::BuildParameters(
}
const char* ActivationFrame::ToCString() {
if (function().IsNull()) {
return Thread::Current()->zone()->PrintToString("[ Frame kind: %s]\n",
KindToCString(kind_));
}
const String& url = String::Handle(SourceUrl());
intptr_t line = LineNumber();
const char* func_name = Debugger::QualifiedFunctionName(function());
@ -1630,7 +1638,7 @@ const char* ActivationFrame::ToCString() {
"\turl = %s\n"
"\tline = %" Pd
"\n"
"\tcontext = %s\n",
"\tcontext = %s]\n",
IsInterpreted() ? "bytecode" : "code", func_name, url.ToCString(), line,
ctx_.ToCString());
}

1
runtime/vm/stack_trace.cc
View file

@ -85,7 +85,6 @@ intptr_t StackTraceUtils::CollectFrames(Thread* thread,
code_array.SetAt(array_offset, bytecode);
} else {
code = frame->LookupDartCode();
function = code.function();
offset = Smi::New(frame->pc() - code.PayloadStart());
code_array.SetAt(array_offset, code);
}