| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "../include/v8stdint.h" |
| #include "../include/v8-preparser.h" |
| |
| #include "../src/preparse-data-format.h" |
| |
| namespace i = v8::internal; |
| |
| // This file is only used for testing the stand-alone preparser |
| // library. |
| // The first argument must be the path of a JavaScript source file. |
| // Optionally this can be followed by the word "throws" (case sensitive), |
| // which signals that the parsing is expected to throw - the default is |
| // to expect the parsing to not throw. |
| // The command line can further be followed by a message text (the |
| // *type* of the exception to throw), and even more optionally, the |
| // start and end position reported with the exception. |
| // |
| // This source file is preparsed and tested against the expectations, and if |
| // successful, the resulting preparser data is written to stdout. |
| // Diagnostic output is output on stderr. |
| // The source file must contain only ASCII characters (UTF-8 isn't supported). |
| // The file is read into memory, so it should have a reasonable size. |
| |
| |
| // Adapts an ASCII string to the UnicodeInputStream interface. |
| class AsciiInputStream : public v8::UnicodeInputStream { |
| public: |
| AsciiInputStream(uint8_t* buffer, size_t length) |
| : buffer_(buffer), |
| end_offset_(static_cast<int>(length)), |
| offset_(0) { } |
| |
| virtual ~AsciiInputStream() { } |
| |
| virtual void PushBack(int32_t ch) { |
| offset_--; |
| #ifdef DEBUG |
| if (offset_ < 0 || |
| (ch != ((offset_ >= end_offset_) ? -1 : buffer_[offset_]))) { |
| fprintf(stderr, "Invalid pushback: '%c' at offset %d.", ch, offset_); |
| exit(1); |
| } |
| #endif |
| } |
| |
| virtual int32_t Next() { |
| if (offset_ >= end_offset_) { |
| offset_++; // Increment anyway to allow symmetric pushbacks. |
| return -1; |
| } |
| uint8_t next_char = buffer_[offset_]; |
| #ifdef DEBUG |
| if (next_char > 0x7fu) { |
| fprintf(stderr, "Non-ASCII character in input: '%c'.", next_char); |
| exit(1); |
| } |
| #endif |
| offset_++; |
| return static_cast<int32_t>(next_char); |
| } |
| |
| private: |
| const uint8_t* buffer_; |
| const int end_offset_; |
| int offset_; |
| }; |
| |
| |
| bool ReadBuffer(FILE* source, void* buffer, size_t length) { |
| size_t actually_read = fread(buffer, 1, length, source); |
| return (actually_read == length); |
| } |
| |
| |
| bool WriteBuffer(FILE* dest, const void* buffer, size_t length) { |
| size_t actually_written = fwrite(buffer, 1, length, dest); |
| return (actually_written == length); |
| } |
| |
| |
| class PreparseDataInterpreter { |
| public: |
| PreparseDataInterpreter(const uint8_t* data, int length) |
| : data_(data), length_(length), message_(NULL) { } |
| |
| ~PreparseDataInterpreter() { |
| if (message_ != NULL) delete[] message_; |
| } |
| |
| bool valid() { |
| int header_length = |
| i::PreparseDataConstants::kHeaderSize * sizeof(int); // NOLINT |
| return length_ >= header_length; |
| } |
| |
| bool throws() { |
| return valid() && |
| word(i::PreparseDataConstants::kHasErrorOffset) != 0; |
| } |
| |
| const char* message() { |
| if (message_ != NULL) return message_; |
| if (!throws()) return NULL; |
| int text_pos = i::PreparseDataConstants::kHeaderSize + |
| i::PreparseDataConstants::kMessageTextPos; |
| int length = word(text_pos); |
| char* buffer = new char[length + 1]; |
| for (int i = 1; i <= length; i++) { |
| int character = word(text_pos + i); |
| buffer[i - 1] = character; |
| } |
| buffer[length] = '\0'; |
| message_ = buffer; |
| return buffer; |
| } |
| |
| int beg_pos() { |
| if (!throws()) return -1; |
| return word(i::PreparseDataConstants::kHeaderSize + |
| i::PreparseDataConstants::kMessageStartPos); |
| } |
| |
| int end_pos() { |
| if (!throws()) return -1; |
| return word(i::PreparseDataConstants::kHeaderSize + |
| i::PreparseDataConstants::kMessageEndPos); |
| } |
| |
| private: |
| int word(int offset) { |
| const int* word_data = reinterpret_cast<const int*>(data_); |
| if (word_data + offset < reinterpret_cast<const int*>(data_ + length_)) { |
| return word_data[offset]; |
| } |
| return -1; |
| } |
| |
| const uint8_t* const data_; |
| const int length_; |
| const char* message_; |
| }; |
| |
| |
| template <typename T> |
| class ScopedPointer { |
| public: |
| explicit ScopedPointer(T* pointer) : pointer_(pointer) {} |
| ~ScopedPointer() { delete[] pointer_; } |
| T& operator[](int index) { return pointer_[index]; } |
| T* operator*() { return pointer_ ;} |
| private: |
| T* pointer_; |
| }; |
| |
| |
| |
| void fail(v8::PreParserData* data, const char* message, ...) { |
| va_list args; |
| va_start(args, message); |
| vfprintf(stderr, message, args); |
| va_end(args); |
| fflush(stderr); |
| // Print preparser data to stdout. |
| uint32_t size = data->size(); |
| fprintf(stderr, "LOG: data size: %u\n", size); |
| if (!WriteBuffer(stdout, data->data(), size)) { |
| perror("ERROR: Writing data"); |
| fflush(stderr); |
| } |
| exit(EXIT_FAILURE); |
| }; |
| |
| |
| bool IsFlag(const char* arg) { |
| // Anything starting with '-' is considered a flag. |
| // It's summarily ignored for now. |
| return arg[0] == '-'; |
| } |
| |
| |
| struct ExceptionExpectation { |
| ExceptionExpectation() |
| : throws(false), type(NULL), beg_pos(-1), end_pos(-1) { } |
| bool throws; |
| const char* type; |
| int beg_pos; |
| int end_pos; |
| }; |
| |
| |
| void CheckException(v8::PreParserData* data, |
| ExceptionExpectation* expects) { |
| PreparseDataInterpreter reader(data->data(), data->size()); |
| if (expects->throws) { |
| if (!reader.throws()) { |
| if (expects->type == NULL) { |
| fail(data, "Didn't throw as expected\n"); |
| } else { |
| fail(data, "Didn't throw \"%s\" as expected\n", expects->type); |
| } |
| } |
| if (expects->type != NULL) { |
| const char* actual_message = reader.message(); |
| if (strcmp(expects->type, actual_message)) { |
| fail(data, "Wrong error message. Expected <%s>, found <%s>\n", |
| expects->type, actual_message); |
| } |
| } |
| if (expects->beg_pos >= 0) { |
| if (expects->beg_pos != reader.beg_pos()) { |
| fail(data, "Wrong error start position: Expected %i, found %i\n", |
| expects->beg_pos, reader.beg_pos()); |
| } |
| } |
| if (expects->end_pos >= 0) { |
| if (expects->end_pos != reader.end_pos()) { |
| fail(data, "Wrong error end position: Expected %i, found %i\n", |
| expects->end_pos, reader.end_pos()); |
| } |
| } |
| } else if (reader.throws()) { |
| const char* message = reader.message(); |
| fail(data, "Throws unexpectedly with message: %s\n", message); |
| } |
| } |
| |
| |
| ExceptionExpectation ParseExpectation(int argc, const char* argv[]) { |
| ExceptionExpectation expects; |
| |
| // Parse exception expectations from (the remainder of) the command line. |
| int arg_index = 0; |
| // Skip any flags. |
| while (argc > arg_index && IsFlag(argv[arg_index])) arg_index++; |
| if (argc > arg_index) { |
| if (strncmp("throws", argv[arg_index], 7)) { |
| // First argument after filename, if present, must be the verbatim |
| // "throws", marking that the preparsing should fail with an exception. |
| fail(NULL, "ERROR: Extra arguments not prefixed by \"throws\".\n"); |
| } |
| expects.throws = true; |
| do { |
| arg_index++; |
| } while (argc > arg_index && IsFlag(argv[arg_index])); |
| if (argc > arg_index) { |
| // Next argument is the exception type identifier. |
| expects.type = argv[arg_index]; |
| do { |
| arg_index++; |
| } while (argc > arg_index && IsFlag(argv[arg_index])); |
| if (argc > arg_index) { |
| expects.beg_pos = atoi(argv[arg_index]); |
| do { |
| arg_index++; |
| } while (argc > arg_index && IsFlag(argv[arg_index])); |
| if (argc > arg_index) { |
| expects.end_pos = atoi(argv[arg_index]); |
| } |
| } |
| } |
| } |
| return expects; |
| } |
| |
| |
| int main(int argc, const char* argv[]) { |
| // Parse command line. |
| // Format: preparser <scriptfile> ["throws" [<exn-type> [<start> [<end>]]]] |
| // Any flags on the line are ignored. |
| |
| // Check for mandatory filename argument. |
| int arg_index = 1; |
| while (argc > arg_index && IsFlag(argv[arg_index])) arg_index++; |
| if (argc <= arg_index) { |
| fail(NULL, "ERROR: No filename on command line.\n"); |
| } |
| const char* filename = argv[arg_index]; |
| // Check remainder of command line for exception expectations. |
| arg_index++; |
| ExceptionExpectation expects = |
| ParseExpectation(argc - arg_index, argv + arg_index); |
| |
| // Open JS file. |
| FILE* input = fopen(filename, "rb"); |
| if (input == NULL) { |
| perror("ERROR: Error opening file"); |
| fflush(stderr); |
| return EXIT_FAILURE; |
| } |
| |
| // Find length of JS file. |
| if (fseek(input, 0, SEEK_END) != 0) { |
| perror("ERROR: Error during seek"); |
| fflush(stderr); |
| return EXIT_FAILURE; |
| } |
| size_t length = static_cast<size_t>(ftell(input)); |
| rewind(input); |
| |
| // Read JS file into memory buffer. |
| ScopedPointer<uint8_t> buffer(new uint8_t[length]); |
| if (!ReadBuffer(input, *buffer, length)) { |
| perror("ERROR: Reading file"); |
| fflush(stderr); |
| return EXIT_FAILURE; |
| } |
| fclose(input); |
| |
| // Preparse input file. |
| AsciiInputStream input_buffer(*buffer, length); |
| size_t kMaxStackSize = 64 * 1024 * sizeof(void*); // NOLINT |
| v8::PreParserData data = v8::Preparse(&input_buffer, kMaxStackSize); |
| |
| // Fail if stack overflow. |
| if (data.stack_overflow()) { |
| fail(&data, "ERROR: Stack overflow\n"); |
| } |
| |
| // Check that the expected exception is thrown, if an exception is |
| // expected. |
| CheckException(&data, &expects); |
| |
| return EXIT_SUCCESS; |
| } |