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c089a152ac
After https://codereview.chromium.org/1204303003/ is submitted, the last remaining uses can go. BUG= R=asiva@google.com Review URL: https://codereview.chromium.org//1220193009 .
298 lines
9.9 KiB
C++
298 lines
9.9 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/coverage.h"
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#include "include/dart_api.h"
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#include "vm/compiler.h"
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#include "vm/isolate.h"
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#include "vm/json_stream.h"
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#include "vm/longjump.h"
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#include "vm/object.h"
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#include "vm/object_store.h"
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namespace dart {
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DEFINE_FLAG(charp, coverage_dir, NULL,
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"Enable writing coverage data into specified directory.");
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class CoverageFilterAll : public CoverageFilter {
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public:
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bool ShouldOutputCoverageFor(const Library& lib,
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const Script& script,
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const Class& cls,
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const Function& func) const {
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return true;
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}
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};
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// map[token_pos] -> line-number.
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static void ComputeTokenPosToLineNumberMap(const Script& script,
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GrowableArray<intptr_t>* map) {
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const TokenStream& tkns = TokenStream::Handle(script.tokens());
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const intptr_t len = ExternalTypedData::Handle(tkns.GetStream()).Length();
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map->SetLength(len);
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#if defined(DEBUG)
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for (intptr_t i = 0; i < len; i++) {
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(*map)[i] = -1;
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}
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#endif
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TokenStream::Iterator tkit(tkns, 0, TokenStream::Iterator::kAllTokens);
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intptr_t cur_line = script.line_offset() + 1;
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while (tkit.CurrentTokenKind() != Token::kEOS) {
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(*map)[tkit.CurrentPosition()] = cur_line;
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if (tkit.CurrentTokenKind() == Token::kNEWLINE) {
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cur_line++;
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}
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tkit.Advance();
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}
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}
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void CodeCoverage::CompileAndAdd(const Function& function,
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const JSONArray& hits_or_sites,
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const GrowableArray<intptr_t>& pos_to_line,
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bool as_call_sites) {
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// If the function should not be compiled for coverage analysis, then just
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// skip this method.
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// TODO(iposva): Maybe we should skip synthesized methods in general too.
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if (function.is_abstract() || function.IsRedirectingFactory()) {
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return;
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}
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if (function.IsNonImplicitClosureFunction() &&
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(function.context_scope() == ContextScope::null())) {
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// TODO(iposva): This can arise if we attempt to compile an inner function
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// before we have compiled its enclosing function or if the enclosing
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// function failed to compile.
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return;
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}
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Thread* thread = Thread::Current();
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Zone* zone = thread->zone();
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Isolate* isolate = thread->isolate();
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// Make sure we have the unoptimized code for this function available.
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if (Compiler::EnsureUnoptimizedCode(thread, function) != Error::null()) {
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// Ignore the error and this function entirely.
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return;
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}
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const Code& code = Code::Handle(zone, function.unoptimized_code());
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ASSERT(!code.IsNull());
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// Print the hit counts for all IC datas.
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ZoneGrowableArray<const ICData*>* ic_data_array =
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new(zone) ZoneGrowableArray<const ICData*>();
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function.RestoreICDataMap(ic_data_array);
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const PcDescriptors& descriptors = PcDescriptors::Handle(
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zone, code.pc_descriptors());
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const intptr_t begin_pos = function.token_pos();
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const intptr_t end_pos = function.end_token_pos();
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intptr_t last_line = -1;
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intptr_t last_count = 0;
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// Only IC based calls have counting.
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PcDescriptors::Iterator iter(descriptors,
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RawPcDescriptors::kIcCall | RawPcDescriptors::kUnoptStaticCall);
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while (iter.MoveNext()) {
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HANDLESCOPE(isolate);
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const ICData* ic_data = (*ic_data_array)[iter.DeoptId()];
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if (!ic_data->IsNull()) {
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const intptr_t token_pos = iter.TokenPos();
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// Filter out descriptors that do not map to tokens in the source code.
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if ((token_pos < begin_pos) || (token_pos > end_pos)) {
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continue;
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}
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intptr_t line = pos_to_line[token_pos];
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#if defined(DEBUG)
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const Script& script = Script::Handle(zone, function.script());
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intptr_t test_line = -1;
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script.GetTokenLocation(token_pos, &test_line, NULL);
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ASSERT(test_line == line);
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#endif
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// Merge hit data where possible.
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if (last_line == line) {
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last_count += ic_data->AggregateCount();
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} else {
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if ((last_line != -1) && !as_call_sites) {
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hits_or_sites.AddValue(last_line);
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hits_or_sites.AddValue(last_count);
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}
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last_count = ic_data->AggregateCount();
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last_line = line;
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}
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if (as_call_sites) {
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bool is_static_call = iter.Kind() == RawPcDescriptors::kUnoptStaticCall;
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ic_data->PrintToJSONArray(hits_or_sites, token_pos, is_static_call);
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}
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}
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}
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// Write last hit value if needed.
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if ((last_line != -1) && !as_call_sites) {
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hits_or_sites.AddValue(last_line);
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hits_or_sites.AddValue(last_count);
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}
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}
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void CodeCoverage::PrintClass(const Library& lib,
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const Class& cls,
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const JSONArray& jsarr,
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CoverageFilter* filter,
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bool as_call_sites) {
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Isolate* isolate = Isolate::Current();
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if (cls.EnsureIsFinalized(isolate) != Error::null()) {
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// Only classes that have been finalized do have a meaningful list of
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// functions.
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return;
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}
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Array& functions = Array::Handle(cls.functions());
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ASSERT(!functions.IsNull());
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Function& function = Function::Handle();
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Script& script = Script::Handle();
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String& saved_url = String::Handle();
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String& url = String::Handle();
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GrowableArray<intptr_t> pos_to_line;
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int i = 0;
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while (i < functions.Length()) {
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HANDLESCOPE(isolate);
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function ^= functions.At(i);
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script = function.script();
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saved_url = script.url();
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if (!filter->ShouldOutputCoverageFor(lib, script, cls, function)) {
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i++;
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continue;
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}
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ComputeTokenPosToLineNumberMap(script, &pos_to_line);
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JSONObject jsobj(&jsarr);
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jsobj.AddProperty("source", saved_url.ToCString());
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jsobj.AddProperty("script", script);
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JSONArray hits_or_sites(&jsobj, as_call_sites ? "callSites" : "hits");
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// We stay within this loop while we are seeing functions from the same
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// source URI.
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while (i < functions.Length()) {
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function ^= functions.At(i);
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script = function.script();
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url = script.url();
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if (!url.Equals(saved_url)) {
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pos_to_line.Clear();
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break;
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}
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if (!filter->ShouldOutputCoverageFor(lib, script, cls, function)) {
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i++;
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continue;
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}
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CompileAndAdd(function, hits_or_sites, pos_to_line, as_call_sites);
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if (function.HasImplicitClosureFunction()) {
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function = function.ImplicitClosureFunction();
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CompileAndAdd(function, hits_or_sites, pos_to_line, as_call_sites);
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}
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i++;
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}
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}
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GrowableObjectArray& closures =
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GrowableObjectArray::Handle(cls.closures());
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if (!closures.IsNull()) {
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i = 0;
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pos_to_line.Clear();
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// We need to keep rechecking the length of the closures array, as handling
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// a closure potentially adds new entries to the end.
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while (i < closures.Length()) {
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HANDLESCOPE(isolate);
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function ^= closures.At(i);
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script = function.script();
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saved_url = script.url();
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if (!filter->ShouldOutputCoverageFor(lib, script, cls, function)) {
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i++;
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continue;
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}
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ComputeTokenPosToLineNumberMap(script, &pos_to_line);
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JSONObject jsobj(&jsarr);
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jsobj.AddProperty("source", saved_url.ToCString());
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jsobj.AddProperty("script", script);
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JSONArray hits_or_sites(&jsobj, as_call_sites ? "callSites" : "hits");
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// We stay within this loop while we are seeing functions from the same
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// source URI.
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while (i < closures.Length()) {
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function ^= closures.At(i);
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script = function.script();
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url = script.url();
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if (!url.Equals(saved_url)) {
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pos_to_line.Clear();
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break;
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}
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CompileAndAdd(function, hits_or_sites, pos_to_line, as_call_sites);
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i++;
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}
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}
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}
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}
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void CodeCoverage::Write(Isolate* isolate) {
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if (FLAG_coverage_dir == NULL) {
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return;
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}
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Dart_FileOpenCallback file_open = Isolate::file_open_callback();
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Dart_FileWriteCallback file_write = Isolate::file_write_callback();
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Dart_FileCloseCallback file_close = Isolate::file_close_callback();
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if ((file_open == NULL) || (file_write == NULL) || (file_close == NULL)) {
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return;
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}
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JSONStream stream;
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PrintJSON(isolate, &stream, NULL, false);
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const char* format = "%s/dart-cov-%" Pd "-%" Pd ".json";
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intptr_t pid = OS::ProcessId();
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intptr_t len = OS::SNPrint(NULL, 0, format,
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FLAG_coverage_dir, pid, isolate->main_port());
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char* filename = Thread::Current()->zone()->Alloc<char>(len + 1);
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OS::SNPrint(filename, len + 1, format,
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FLAG_coverage_dir, pid, isolate->main_port());
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void* file = (*file_open)(filename, true);
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if (file == NULL) {
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OS::Print("Failed to write coverage file: %s\n", filename);
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return;
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}
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(*file_write)(stream.buffer()->buf(), stream.buffer()->length(), file);
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(*file_close)(file);
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}
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void CodeCoverage::PrintJSON(Isolate* isolate,
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JSONStream* stream,
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CoverageFilter* filter,
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bool as_call_sites) {
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CoverageFilterAll default_filter;
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if (filter == NULL) {
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filter = &default_filter;
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}
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const GrowableObjectArray& libs = GrowableObjectArray::Handle(
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isolate, isolate->object_store()->libraries());
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Library& lib = Library::Handle();
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Class& cls = Class::Handle();
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JSONObject coverage(stream);
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coverage.AddProperty("type", "CodeCoverage");
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{
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JSONArray jsarr(&coverage, "coverage");
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for (int i = 0; i < libs.Length(); i++) {
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lib ^= libs.At(i);
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ClassDictionaryIterator it(lib, ClassDictionaryIterator::kIteratePrivate);
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while (it.HasNext()) {
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cls = it.GetNextClass();
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ASSERT(!cls.IsNull());
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PrintClass(lib, cls, jsarr, filter, as_call_sites);
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}
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}
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}
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}
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} // namespace dart
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