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[flutter_runner] Generate symbols for the Dart VM profiler (flutter#1…
…2048) Ported from the original implementation in the Topaz tree.
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56 changes: 56 additions & 0 deletions
56
shell/platform/fuchsia/runtime/dart/profiler_symbols/BUILD.gn
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| # Copyright 2013 The Flutter Authors. All rights reserved. | ||
| # Use of this source code is governed by a BSD-style license that can be | ||
| # found in the LICENSE file. | ||
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| import("//third_party/dart/build/dart/dart_action.gni") | ||
| import("$flutter_root/tools/fuchsia/clang.gni") | ||
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| template("generate_dart_profiler_symbols") { | ||
| assert(defined(invoker.library_label), "Must define 'library_label'") | ||
| assert(defined(invoker.library_path), "Must define 'library_path'") | ||
| assert(defined(invoker.output), "Must define 'output'") | ||
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| prebuilt_dart_action(target_name) { | ||
| deps = [ | ||
| invoker.library_label, | ||
| ] | ||
| inputs = [ | ||
| invoker.library_path, | ||
| ] | ||
| outputs = [ | ||
| invoker.output, | ||
| ] | ||
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| script = "dart_profiler_symbols.dart" | ||
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| packages = rebase_path("//third_party/dart/.packages") | ||
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| args = [ | ||
| "--nm", | ||
| rebase_path("//fuchsia/toolchain/$host_os/bin/llvm-nm"), | ||
| "--binary", | ||
| rebase_path(invoker.library_path), | ||
| "--output", | ||
| rebase_path(invoker.output), | ||
| ] | ||
| } | ||
| } | ||
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| generate_dart_profiler_symbols("dart_jit_runner") { | ||
| library_label = | ||
| "$flutter_root/shell/platform/fuchsia/dart_runner:dart_jit_runner_bin" | ||
| library_path = "${root_out_dir}/exe.unstripped/dart_jit_runner" | ||
| output = "${target_gen_dir}/dart_jit_runner.dartprofilersymbols" | ||
| } | ||
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| generate_dart_profiler_symbols("flutter_jit_runner") { | ||
| library_label = "$flutter_root/shell/platform/fuchsia/flutter:jit" | ||
| library_path = "${root_out_dir}/exe.unstripped/flutter_jit_runner" | ||
| output = "${target_gen_dir}/flutter_jit_runner.dartprofilersymbols" | ||
| } | ||
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| generate_dart_profiler_symbols("flutter_aot_runner") { | ||
| library_label = "$flutter_root/shell/platform/fuchsia/flutter:aot" | ||
| library_path = "${root_out_dir}/exe.unstripped/flutter_aot_runner" | ||
| output = "${target_gen_dir}/flutter_aot_runner.dartprofilersymbols" | ||
| } |
3 changes: 3 additions & 0 deletions
3
shell/platform/fuchsia/runtime/dart/profiler_symbols/analysis_options.yaml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| # Copyright 2013 The Flutter Authors. All rights reserved. | ||
| # Use of this source code is governed by a BSD-style license that can be | ||
| # found in the LICENSE file. |
143 changes: 143 additions & 0 deletions
143
shell/platform/fuchsia/runtime/dart/profiler_symbols/dart_profiler_symbols.dart
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,143 @@ | ||
| // Copyright 2013 The Flutter Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
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| // On Fuchsia, in lieu of the ELF dynamic symbol table consumed through dladdr, | ||
| // the Dart VM profiler consumes symbols produced by this tool, which have the | ||
| // format | ||
| // | ||
| // struct { | ||
| // uint32_t num_entries; | ||
| // struct { | ||
| // uint32_t offset; | ||
| // uint32_t size; | ||
| // uint32_t string_table_offset; | ||
| // } entries[num_entries]; | ||
| // const char* string_table; | ||
| // } | ||
| // | ||
| // Entries are sorted by offset. String table entries are NUL-terminated. | ||
| // | ||
| // See also //third_party/dart/runtime/vm/native_symbol_fuchsia.cc | ||
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| import "dart:convert"; | ||
| import "dart:io"; | ||
| import "dart:typed_data"; | ||
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| import "package:args/args.dart"; | ||
| import "package:path/path.dart" as path; | ||
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| Future<void> main(List<String> args) async { | ||
| final parser = new ArgParser(); | ||
| parser.addOption("nm", help: "Path to `nm` tool"); | ||
| parser.addOption("binary", | ||
| help: "Path to the ELF file to extract symbols from"); | ||
| parser.addOption("output", help: "Path to output symbol table"); | ||
| final usage = """ | ||
| Usage: dart_profiler_symbols.dart [options] | ||
| Options: | ||
| ${parser.usage}; | ||
| """; | ||
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| String buildIdDir; | ||
| String buildIdScript; | ||
| String nm; | ||
| String binary; | ||
| String output; | ||
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| try { | ||
| final options = parser.parse(args); | ||
| nm = options["nm"]; | ||
| if (nm == null) { | ||
| throw "Must specify --nm"; | ||
| } | ||
| if (!FileSystemEntity.isFileSync(nm)) { | ||
| throw "Cannot find $nm"; | ||
| } | ||
| binary = options["binary"]; | ||
| if (binary == null) { | ||
| throw "Must specify --binary"; | ||
| } | ||
| if (!FileSystemEntity.isFileSync(binary)) { | ||
| throw "Cannot find $binary"; | ||
| } | ||
| output = options["output"]; | ||
| if (output == null) { | ||
| throw "Must specify --output"; | ||
| } | ||
| } catch (e) { | ||
| print("ERROR: $e\n"); | ||
| print(usage); | ||
| exitCode = 1; | ||
| return; | ||
| } | ||
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| await run(buildIdDir, buildIdScript, nm, binary, output); | ||
| } | ||
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| class Symbol { | ||
| int offset; | ||
| int size; | ||
| String name; | ||
| } | ||
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| Future<void> run(String buildIdDir, String buildIdScript, String nm, | ||
| String binary, String output) async { | ||
| final unstrippedFile = binary; | ||
| final args = ["--demangle", "--numeric-sort", "--print-size", unstrippedFile]; | ||
| final result = await Process.run(nm, args); | ||
| if (result.exitCode != 0) { | ||
| print(result.stdout); | ||
| print(result.stderr); | ||
| throw "Command failed: $nm $args"; | ||
| } | ||
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| var symbols = new List(); | ||
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| var regex = new RegExp("([0-9A-Za-z]+) ([0-9A-Za-z]+) (t|T|w|W) (.*)"); | ||
| for (final line in result.stdout.split("\n")) { | ||
| var match = regex.firstMatch(line); | ||
| if (match == null) { | ||
| continue; // Ignore non-text symbols. | ||
| } | ||
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| final symbol = new Symbol(); | ||
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| // Note that capture groups start at 1. | ||
| symbol.offset = int.parse(match[1], radix: 16); | ||
| symbol.size = int.parse(match[2], radix: 16); | ||
| symbol.name = match[4].split("(")[0]; | ||
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| if (symbol.name.startsWith("\$")) { | ||
| continue; // Ignore compiler/assembler temps. | ||
| } | ||
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| symbols.add(symbol); | ||
| } | ||
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| if (symbols.isEmpty) { | ||
| throw "$unstrippedFile has no symbols"; | ||
| } | ||
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| var nameTable = new BytesBuilder(); | ||
| var binarySearchTable = new Uint32List(symbols.length * 3 + 1); | ||
| var binarySearchTableIndex = 0; | ||
| binarySearchTable[binarySearchTableIndex++] = symbols.length; | ||
| // Symbols are sorted by offset because of --numeric-sort. | ||
| for (var symbol in symbols) { | ||
| var nameOffset = nameTable.length; | ||
| nameTable.add(utf8.encode(symbol.name)); | ||
| nameTable.addByte(0); | ||
| binarySearchTable[binarySearchTableIndex++] = symbol.offset; | ||
| binarySearchTable[binarySearchTableIndex++] = symbol.size; | ||
| binarySearchTable[binarySearchTableIndex++] = nameOffset; | ||
| } | ||
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| var file = new File(output); | ||
| await file.parent.create(recursive: true); | ||
| var sink = file.openWrite(); | ||
| sink.add(binarySearchTable.buffer.asUint8List()); | ||
| sink.add(nameTable.takeBytes()); | ||
| await sink.close(); | ||
| } |
8 changes: 8 additions & 0 deletions
8
shell/platform/fuchsia/runtime/dart/profiler_symbols/pubspec.yaml
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,8 @@ | ||
| # Copyright 2013 The Flutter Authors. All rights reserved. | ||
| # Use of this source code is governed by a BSD-style license that can be | ||
| # found in the LICENSE file. | ||
|
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| name: profiler_symbols | ||
| version: 0 | ||
| description: Extracts a minimal symbols table for the Dart VM profiler | ||
| author: Dart Team <[email protected]> |