diff options
Diffstat (limited to 'src/support')
-rw-r--r-- | src/support/CMakeLists.txt | 1 | ||||
-rw-r--r-- | src/support/command-line.cpp | 8 | ||||
-rw-r--r-- | src/support/debug.cpp | 51 | ||||
-rw-r--r-- | src/support/debug.h | 61 |
4 files changed, 119 insertions, 2 deletions
diff --git a/src/support/CMakeLists.txt b/src/support/CMakeLists.txt index c8d7632e4..73025d063 100644 --- a/src/support/CMakeLists.txt +++ b/src/support/CMakeLists.txt @@ -3,6 +3,7 @@ SET(support_SOURCES bits.cpp colors.cpp command-line.cpp + debug.cpp file.cpp path.cpp safe_integer.cpp diff --git a/src/support/command-line.cpp b/src/support/command-line.cpp index be5098677..0986a49ff 100644 --- a/src/support/command-line.cpp +++ b/src/support/command-line.cpp @@ -16,6 +16,7 @@ #include "support/command-line.h" #include "config.h" +#include "support/debug.h" using namespace wasm; @@ -91,8 +92,11 @@ Options::Options(const std::string& command, const std::string& description) add("--debug", "-d", "Print debug information to stderr", - Arguments::Zero, - [&](Options* o, const std::string& arguments) { debug = true; }); + Arguments::Optional, + [&](Options* o, const std::string& arguments) { + debug = true; + setDebugEnabled(arguments.c_str()); + }); } Options::~Options() {} diff --git a/src/support/debug.cpp b/src/support/debug.cpp new file mode 100644 index 000000000..15b708d5e --- /dev/null +++ b/src/support/debug.cpp @@ -0,0 +1,51 @@ +/* + * Copyright 2019 WebAssembly Community Group participants + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "support/debug.h" + +#include <cstring> +#include <set> +#include <string> + +static bool debugEnabled = false; +static std::set<std::string> debugTypesEnabled; + +bool wasm::isDebugEnabled(const char* type) { + if (!debugEnabled) { + return false; + } + if (debugTypesEnabled.empty()) { + return true; + } + return debugTypesEnabled.count(type) > 0; +} + +void wasm::setDebugEnabled(const char* types) { + debugEnabled = true; + // split types on comma and add each string to debugTypesEnabled + size_t start = 0; + size_t end = strlen(types); + while (start < end) { + const char* type_end = strchr(types + start, ','); + if (type_end == nullptr) { + type_end = types + end; + } + size_t type_size = type_end - types + start; + std::string type(types + start, type_size); + debugTypesEnabled.insert(type); + start += type_size + 1; + } +} diff --git a/src/support/debug.h b/src/support/debug.h new file mode 100644 index 000000000..960082d1a --- /dev/null +++ b/src/support/debug.h @@ -0,0 +1,61 @@ +/* + * Copyright 2019 WebAssembly Community Group participants + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +// Implements BYN_DEBUG macro similar to llvm's include/llvm/Support/Debug.h, +// which can include any code, and in addition and printf-file BYN_TRACE. +// +// To use these macros you must define DEBUG_TYPE to a C string within your +// source code which then acts as the name of a channel which can be +// individually enabled via --debug=<chan>. Specifying --debug without any +// argument enables all channels. + +#ifndef wasm_support_debug_h +#define wasm_support_debug_h + +#ifndef NDEBUG + +namespace wasm { +bool isDebugEnabled(const char* type); +void setDebugEnabled(const char* types); +} // namespace wasm + +#define BYN_DEBUG_WITH_TYPE(TYPE, X) \ + do { \ + if (::wasm::isDebugEnabled(TYPE)) { \ + X; \ + } \ + } while (false) + +#define BYN_TRACE_WITH_TYPE(TYPE, MSG) \ + BYN_DEBUG_WITH_TYPE(TYPE, std::cerr << MSG); + +#else + +#define BYN_DEBUG_WITH_TYPE(...) \ + do { \ + } while (false) +#define BYN_TRACE_WITH_TYPE(...) \ + do { \ + } while (false) +#define isDebugEnabled() (false) +#define setDebugEnabled() + +#endif + +#define BYN_DEBUG(X) BYN_DEBUG_WITH_TYPE(DEBUG_TYPE, X) +#define BYN_TRACE(MSG) BYN_TRACE_WITH_TYPE(DEBUG_TYPE, MSG) + +#endif // wasm_support_debug_h |