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/* |
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instrument-js.c - JavaScript instrumentation routines |
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Copyright (C) 2007, 2008 siliconforks.com |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, write to the Free Software Foundation, Inc., |
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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*/ |
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|
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#include <config.h> |
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|
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#include "instrument-js.h" |
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|
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#include <assert.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include <jsapi.h> |
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#include <jsarena.h> |
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#include <jsatom.h> |
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#include <jsemit.h> |
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#include <jsexn.h> |
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#include <jsfun.h> |
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#include <jsinterp.h> |
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#include <jsiter.h> |
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#include <jsparse.h> |
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#include <jsregexp.h> |
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#include <jsscope.h> |
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#include <jsstr.h> |
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|
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#include "encoding.h" |
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#include "global.h" |
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#include "highlight.h" |
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#include "resource-manager.h" |
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#include "util.h" |
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|
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struct IfDirective { |
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const jschar * condition_start; |
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const jschar * condition_end; |
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uint16_t start_line; |
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uint16_t end_line; |
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struct IfDirective * next; |
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}; |
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|
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static bool * exclusive_directives = NULL; |
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|
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static JSRuntime * runtime = NULL; |
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static JSContext * context = NULL; |
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static JSObject * global = NULL; |
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static JSVersion js_version = JSVERSION_ECMA_3; |
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|
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/* |
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JSParseNode objects store line numbers starting from 1. |
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The lines array stores line numbers starting from 0. |
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*/ |
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static const char * file_id = NULL; |
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static char * lines = NULL; |
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static uint16_t num_lines = 0; |
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|
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void jscoverage_set_js_version(const char * version) { |
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js_version = atoi(version); |
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} |
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|
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void jscoverage_init(void) { |
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runtime = JS_NewRuntime(8L * 1024L * 1024L); |
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if (runtime == NULL) { |
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fatal("cannot create runtime"); |
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} |
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|
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context = JS_NewContext(runtime, 8192); |
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if (context == NULL) { |
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fatal("cannot create context"); |
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} |
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|
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JS_SetVersion(context, js_version); |
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|
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global = JS_NewObject(context, NULL, NULL, NULL); |
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if (global == NULL) { |
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fatal("cannot create global object"); |
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} |
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|
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if (! JS_InitStandardClasses(context, global)) { |
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fatal("cannot initialize standard classes"); |
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} |
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} |
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|
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void jscoverage_cleanup(void) { |
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JS_DestroyContext(context); |
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JS_DestroyRuntime(runtime); |
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} |
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|
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static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) { |
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for (size_t i = 0; i < num_characters; i++) { |
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jschar c = characters[i]; |
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/* |
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XXX does not handle no-break space, other unicode "space separator" |
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*/ |
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switch (c) { |
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case 0x9: |
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case 0xB: |
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case 0xC: |
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Stream_write_char(f, c); |
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break; |
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default: |
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if (32 <= c && c <= 126) { |
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Stream_write_char(f, c); |
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} |
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else { |
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Stream_printf(f, "\\u%04x", c); |
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} |
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break; |
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} |
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} |
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} |
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|
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static void print_string(JSString * s, Stream * f) { |
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size_t length = JSSTRING_LENGTH(s); |
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jschar * characters = JSSTRING_CHARS(s); |
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for (size_t i = 0; i < length; i++) { |
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jschar c = characters[i]; |
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if (32 <= c && c <= 126) { |
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switch (c) { |
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case '"': |
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Stream_write_string(f, "\\\""); |
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break; |
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/* |
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case '\'': |
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Stream_write_string(f, "\\'"); |
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break; |
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*/ |
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case '\\': |
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Stream_write_string(f, "\\\\"); |
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break; |
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default: |
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Stream_write_char(f, c); |
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break; |
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} |
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} |
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else { |
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switch (c) { |
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case 0x8: |
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Stream_write_string(f, "\\b"); |
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break; |
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case 0x9: |
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Stream_write_string(f, "\\t"); |
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break; |
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case 0xa: |
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Stream_write_string(f, "\\n"); |
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break; |
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/* IE doesn't support this */ |
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/* |
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case 0xb: |
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Stream_write_string(f, "\\v"); |
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break; |
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*/ |
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case 0xc: |
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Stream_write_string(f, "\\f"); |
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break; |
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case 0xd: |
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Stream_write_string(f, "\\r"); |
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break; |
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default: |
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Stream_printf(f, "\\u%04x", c); |
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break; |
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} |
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} |
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} |
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} |
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|
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static void print_string_atom(JSAtom * atom, Stream * f) { |
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assert(ATOM_IS_STRING(atom)); |
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JSString * s = ATOM_TO_STRING(atom); |
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print_string(s, f); |
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} |
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|
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static void print_regex(jsval value, Stream * f) { |
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assert(JSVAL_IS_STRING(value)); |
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JSString * s = JSVAL_TO_STRING(value); |
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size_t length = JSSTRING_LENGTH(s); |
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jschar * characters = JSSTRING_CHARS(s); |
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for (size_t i = 0; i < length; i++) { |
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jschar c = characters[i]; |
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if (32 <= c && c <= 126) { |
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Stream_write_char(f, c); |
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} |
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else { |
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Stream_printf(f, "\\u%04x", c); |
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} |
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} |
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} |
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|
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static void print_quoted_string_atom(JSAtom * atom, Stream * f) { |
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assert(ATOM_IS_STRING(atom)); |
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JSString * s = ATOM_TO_STRING(atom); |
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Stream_write_char(f, '"'); |
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print_string(s, f); |
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Stream_write_char(f, '"'); |
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} |
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|
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static const char * get_op(uint8 op) { |
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switch(op) { |
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case JSOP_OR: |
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return "||"; |
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case JSOP_AND: |
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return "&&"; |
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case JSOP_BITOR: |
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return "|"; |
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case JSOP_BITXOR: |
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return "^"; |
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case JSOP_BITAND: |
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return "&"; |
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case JSOP_EQ: |
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return "=="; |
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case JSOP_NE: |
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return "!="; |
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case JSOP_STRICTEQ: |
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return "==="; |
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case JSOP_STRICTNE: |
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return "!=="; |
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case JSOP_LT: |
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return "<"; |
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case JSOP_LE: |
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return "<="; |
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case JSOP_GT: |
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return ">"; |
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case JSOP_GE: |
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return ">="; |
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case JSOP_LSH: |
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return "<<"; |
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case JSOP_RSH: |
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return ">>"; |
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case JSOP_URSH: |
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return ">>>"; |
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case JSOP_ADD: |
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return "+"; |
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case JSOP_SUB: |
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return "-"; |
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case JSOP_MUL: |
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return "*"; |
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case JSOP_DIV: |
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return "/"; |
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case JSOP_MOD: |
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return "%"; |
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default: |
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abort(); |
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} |
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} |
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|
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static void instrument_expression(JSParseNode * node, Stream * f); |
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static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if); |
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static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if); |
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|
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enum FunctionType { |
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FUNCTION_NORMAL, |
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FUNCTION_GETTER_OR_SETTER |
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}; |
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|
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static void output_for_in(JSParseNode * node, Stream * f) { |
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assert(node->pn_type == TOK_FOR); |
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assert(node->pn_arity == PN_BINARY); |
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Stream_write_string(f, "for "); |
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if (node->pn_iflags & JSITER_FOREACH) { |
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Stream_write_string(f, "each "); |
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} |
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Stream_write_char(f, '('); |
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instrument_expression(node->pn_left, f); |
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Stream_write_char(f, ')'); |
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} |
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|
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static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) { |
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assert(node->pn_type == TOK_FUNCTION); |
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assert(node->pn_arity == PN_FUNC); |
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JSObject * object = node->pn_funpob->object; |
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assert(JS_ObjectIsFunction(context, object)); |
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JSFunction * function = (JSFunction *) JS_GetPrivate(context, object); |
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assert(function); |
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assert(object == &function->object); |
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Stream_printf(f, "%*s", indent, ""); |
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if (type == FUNCTION_NORMAL) { |
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Stream_write_string(f, "function"); |
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} |
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|
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/* function name */ |
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if (function->atom) { |
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Stream_write_char(f, ' '); |
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print_string_atom(function->atom, f); |
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} |
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|
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/* |
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function parameters - see JS_DecompileFunction in jsapi.cpp, which calls |
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js_DecompileFunction in jsopcode.cpp |
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*/ |
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Stream_write_string(f, "("); |
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JSArenaPool pool; |
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JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota); |
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jsuword * local_names = NULL; |
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if (JS_GET_LOCAL_NAME_COUNT(function)) { |
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local_names = js_GetLocalNameArray(context, function, &pool); |
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if (local_names == NULL) { |
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fatal("out of memory"); |
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} |
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} |
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for (int i = 0; i < function->nargs; i++) { |
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if (i > 0) { |
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Stream_write_string(f, ", "); |
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} |
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JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]); |
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if (param == NULL) { |
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fatal("unsupported parameter type for function: %s", file_id); |
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} |
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print_string_atom(param, f); |
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} |
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JS_FinishArenaPool(&pool); |
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Stream_write_string(f, ") {\n"); |
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|
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/* function body */ |
327 |
if (function->flags & JSFUN_EXPR_CLOSURE) { |
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/* expression closure */ |
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output_statement(node->pn_body, f, indent + 2, false); |
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} |
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else { |
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instrument_statement(node->pn_body, f, indent + 2, false); |
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} |
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|
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Stream_write_string(f, "}\n"); |
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} |
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|
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static void instrument_function_call(JSParseNode * node, Stream * f) { |
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JSParseNode * function_node = node->pn_head; |
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if (function_node->pn_type == TOK_FUNCTION) { |
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JSObject * object = function_node->pn_funpob->object; |
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assert(JS_ObjectIsFunction(context, object)); |
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JSFunction * function = (JSFunction *) JS_GetPrivate(context, object); |
344 |
assert(function); |
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assert(object == &function->object); |
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|
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if (function_node->pn_flags & TCF_GENEXP_LAMBDA) { |
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/* it's a generator expression */ |
349 |
JSParseNode * lexical_scope_node = function_node->pn_body; |
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assert(lexical_scope_node->pn_type == TOK_LEXICALSCOPE); |
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assert(lexical_scope_node->pn_arity == PN_NAME); |
352 |
JSParseNode * for_node = lexical_scope_node->pn_body; |
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assert(for_node->pn_type == TOK_FOR); |
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assert(for_node->pn_arity == PN_BINARY); |
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JSParseNode * if_node = NULL; |
356 |
JSParseNode * semi_node; |
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switch (for_node->pn_right->pn_type) { |
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case TOK_SEMI: |
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semi_node = for_node->pn_right; |
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break; |
361 |
case TOK_IF: |
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if_node = for_node->pn_right; |
363 |
assert(if_node->pn_arity == PN_TERNARY); |
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semi_node = if_node->pn_kid2; |
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assert(semi_node->pn_type == TOK_SEMI); |
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break; |
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default: |
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abort(); |
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break; |
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} |
371 |
assert(semi_node->pn_arity == PN_UNARY); |
372 |
JSParseNode * yield_node = semi_node->pn_kid; |
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assert(yield_node->pn_type == TOK_YIELD); |
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Stream_write_char(f, '('); |
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instrument_expression(yield_node->pn_kid, f); |
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Stream_write_char(f, ' '); |
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output_for_in(for_node, f); |
378 |
if (if_node) { |
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Stream_write_string(f, " if ("); |
380 |
instrument_expression(if_node->pn_kid1, f); |
381 |
Stream_write_char(f, ')'); |
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} |
383 |
Stream_write_char(f, ')'); |
384 |
return; |
385 |
} |
386 |
else { |
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Stream_write_char(f, '('); |
388 |
instrument_expression(function_node, f); |
389 |
Stream_write_char(f, ')'); |
390 |
} |
391 |
} |
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else { |
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instrument_expression(function_node, f); |
394 |
} |
395 |
Stream_write_char(f, '('); |
396 |
for (struct JSParseNode * p = function_node->pn_next; p != NULL; p = p->pn_next) { |
397 |
if (p != node->pn_head->pn_next) { |
398 |
Stream_write_string(f, ", "); |
399 |
} |
400 |
instrument_expression(p, f); |
401 |
} |
402 |
Stream_write_char(f, ')'); |
403 |
} |
404 |
|
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static void instrument_declarations(JSParseNode * list, Stream * f) { |
406 |
assert(list->pn_arity == PN_LIST); |
407 |
for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) { |
408 |
switch (p->pn_type) { |
409 |
case TOK_NAME: |
410 |
assert(p->pn_arity == PN_NAME); |
411 |
if (p != list->pn_head) { |
412 |
Stream_write_string(f, ", "); |
413 |
} |
414 |
print_string_atom(p->pn_atom, f); |
415 |
if (p->pn_expr != NULL) { |
416 |
Stream_write_string(f, " = "); |
417 |
instrument_expression(p->pn_expr, f); |
418 |
} |
419 |
break; |
420 |
case TOK_ASSIGN: |
421 |
case TOK_RB: |
422 |
case TOK_RC: |
423 |
/* destructuring */ |
424 |
instrument_expression(p, f); |
425 |
break; |
426 |
default: |
427 |
abort(); |
428 |
break; |
429 |
} |
430 |
} |
431 |
} |
432 |
|
433 |
/* |
434 |
See <Expressions> in jsparse.h. |
435 |
TOK_FUNCTION is handled as a statement and as an expression. |
436 |
TOK_DBLDOT is not handled (XML op). |
437 |
TOK_DEFSHARP and TOK_USESHARP are not handled. |
438 |
TOK_ANYNAME is not handled (XML op). |
439 |
TOK_AT is not handled (XML op). |
440 |
TOK_DBLCOLON is not handled. |
441 |
TOK_XML* are not handled. |
442 |
There seem to be some undocumented expressions: |
443 |
TOK_INSTANCEOF binary |
444 |
TOK_IN binary |
445 |
*/ |
446 |
static void instrument_expression(JSParseNode * node, Stream * f) { |
447 |
switch (node->pn_type) { |
448 |
case TOK_FUNCTION: |
449 |
instrument_function(node, f, 0, FUNCTION_NORMAL); |
450 |
break; |
451 |
case TOK_COMMA: |
452 |
for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) { |
453 |
if (p != node->pn_head) { |
454 |
Stream_write_string(f, ", "); |
455 |
} |
456 |
instrument_expression(p, f); |
457 |
} |
458 |
break; |
459 |
case TOK_ASSIGN: |
460 |
instrument_expression(node->pn_left, f); |
461 |
Stream_write_char(f, ' '); |
462 |
switch (node->pn_op) { |
463 |
case JSOP_ADD: |
464 |
case JSOP_SUB: |
465 |
case JSOP_MUL: |
466 |
case JSOP_MOD: |
467 |
case JSOP_LSH: |
468 |
case JSOP_RSH: |
469 |
case JSOP_URSH: |
470 |
case JSOP_BITAND: |
471 |
case JSOP_BITOR: |
472 |
case JSOP_BITXOR: |
473 |
case JSOP_DIV: |
474 |
Stream_printf(f, "%s", get_op(node->pn_op)); |
475 |
break; |
476 |
default: |
477 |
/* do nothing - it must be a simple assignment */ |
478 |
break; |
479 |
} |
480 |
Stream_write_string(f, "= "); |
481 |
instrument_expression(node->pn_right, f); |
482 |
break; |
483 |
case TOK_HOOK: |
484 |
instrument_expression(node->pn_kid1, f); |
485 |
Stream_write_string(f, "? "); |
486 |
instrument_expression(node->pn_kid2, f); |
487 |
Stream_write_string(f, ": "); |
488 |
instrument_expression(node->pn_kid3, f); |
489 |
break; |
490 |
case TOK_OR: |
491 |
case TOK_AND: |
492 |
case TOK_BITOR: |
493 |
case TOK_BITXOR: |
494 |
case TOK_BITAND: |
495 |
case TOK_EQOP: |
496 |
case TOK_RELOP: |
497 |
case TOK_SHOP: |
498 |
case TOK_PLUS: |
499 |
case TOK_MINUS: |
500 |
case TOK_STAR: |
501 |
case TOK_DIVOP: |
502 |
switch (node->pn_arity) { |
503 |
case PN_BINARY: |
504 |
instrument_expression(node->pn_left, f); |
505 |
Stream_printf(f, " %s ", get_op(node->pn_op)); |
506 |
instrument_expression(node->pn_right, f); |
507 |
break; |
508 |
case PN_LIST: |
509 |
for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) { |
510 |
if (p != node->pn_head) { |
511 |
Stream_printf(f, " %s ", get_op(node->pn_op)); |
512 |
} |
513 |
instrument_expression(p, f); |
514 |
} |
515 |
break; |
516 |
default: |
517 |
abort(); |
518 |
} |
519 |
break; |
520 |
case TOK_UNARYOP: |
521 |
switch (node->pn_op) { |
522 |
case JSOP_NEG: |
523 |
Stream_write_char(f, '-'); |
524 |
instrument_expression(node->pn_kid, f); |
525 |
break; |
526 |
case JSOP_POS: |
527 |
Stream_write_char(f, '+'); |
528 |
instrument_expression(node->pn_kid, f); |
529 |
break; |
530 |
case JSOP_NOT: |
531 |
Stream_write_char(f, '!'); |
532 |
instrument_expression(node->pn_kid, f); |
533 |
break; |
534 |
case JSOP_BITNOT: |
535 |
Stream_write_char(f, '~'); |
536 |
instrument_expression(node->pn_kid, f); |
537 |
break; |
538 |
case JSOP_TYPEOF: |
539 |
Stream_write_string(f, "typeof "); |
540 |
instrument_expression(node->pn_kid, f); |
541 |
break; |
542 |
case JSOP_VOID: |
543 |
Stream_write_string(f, "void "); |
544 |
instrument_expression(node->pn_kid, f); |
545 |
break; |
546 |
default: |
547 |
fatal("%s: unknown operator (%d) in file", file_id, node->pn_op); |
548 |
break; |
549 |
} |
550 |
break; |
551 |
case TOK_INC: |
552 |
case TOK_DEC: |
553 |
/* |
554 |
This is not documented, but node->pn_op tells whether it is pre- or post-increment. |
555 |
*/ |
556 |
switch (node->pn_op) { |
557 |
case JSOP_INCNAME: |
558 |
case JSOP_INCPROP: |
559 |
case JSOP_INCELEM: |
560 |
Stream_write_string(f, "++"); |
561 |
instrument_expression(node->pn_kid, f); |
562 |
break; |
563 |
case JSOP_DECNAME: |
564 |
case JSOP_DECPROP: |
565 |
case JSOP_DECELEM: |
566 |
Stream_write_string(f, "--"); |
567 |
instrument_expression(node->pn_kid, f); |
568 |
break; |
569 |
case JSOP_NAMEINC: |
570 |
case JSOP_PROPINC: |
571 |
case JSOP_ELEMINC: |
572 |
instrument_expression(node->pn_kid, f); |
573 |
Stream_write_string(f, "++"); |
574 |
break; |
575 |
case JSOP_NAMEDEC: |
576 |
case JSOP_PROPDEC: |
577 |
case JSOP_ELEMDEC: |
578 |
instrument_expression(node->pn_kid, f); |
579 |
Stream_write_string(f, "--"); |
580 |
break; |
581 |
default: |
582 |
abort(); |
583 |
break; |
584 |
} |
585 |
break; |
586 |
case TOK_NEW: |
587 |
Stream_write_string(f, "new "); |
588 |
instrument_function_call(node, f); |
589 |
break; |
590 |
case TOK_DELETE: |
591 |
Stream_write_string(f, "delete "); |
592 |
instrument_expression(node->pn_kid, f); |
593 |
break; |
594 |
case TOK_DOT: |
595 |
/* |
596 |
This may have originally been x['foo-bar']. Because the string 'foo-bar' |
597 |
contains illegal characters, we have to use the subscript syntax instead of |
598 |
the dot syntax. |
599 |
*/ |
600 |
instrument_expression(node->pn_expr, f); |
601 |
assert(ATOM_IS_STRING(node->pn_atom)); |
602 |
{ |
603 |
JSString * s = ATOM_TO_STRING(node->pn_atom); |
604 |
bool must_quote; |
605 |
if (JSSTRING_LENGTH(s) == 0) { |
606 |
must_quote = true; |
607 |
} |
608 |
else if (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF) { |
609 |
must_quote = true; |
610 |
} |
611 |
else if (! js_IsIdentifier(s)) { |
612 |
must_quote = true; |
613 |
} |
614 |
else { |
615 |
must_quote = false; |
616 |
} |
617 |
if (must_quote) { |
618 |
Stream_write_char(f, '['); |
619 |
print_quoted_string_atom(node->pn_atom, f); |
620 |
Stream_write_char(f, ']'); |
621 |
} |
622 |
else { |
623 |
Stream_write_char(f, '.'); |
624 |
print_string_atom(node->pn_atom, f); |
625 |
} |
626 |
} |
627 |
break; |
628 |
case TOK_LB: |
629 |
instrument_expression(node->pn_left, f); |
630 |
Stream_write_char(f, '['); |
631 |
instrument_expression(node->pn_right, f); |
632 |
Stream_write_char(f, ']'); |
633 |
break; |
634 |
case TOK_LP: |
635 |
instrument_function_call(node, f); |
636 |
break; |
637 |
case TOK_RB: |
638 |
Stream_write_char(f, '['); |
639 |
for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) { |
640 |
if (p != node->pn_head) { |
641 |
Stream_write_string(f, ", "); |
642 |
} |
643 |
/* TOK_COMMA is a special case: a hole in the array */ |
644 |
if (p->pn_type != TOK_COMMA) { |
645 |
instrument_expression(p, f); |
646 |
} |
647 |
} |
648 |
if (node->pn_extra == PNX_ENDCOMMA) { |
649 |
Stream_write_char(f, ','); |
650 |
} |
651 |
Stream_write_char(f, ']'); |
652 |
break; |
653 |
case TOK_RC: |
654 |
Stream_write_char(f, '{'); |
655 |
for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) { |
656 |
if (p->pn_type != TOK_COLON) { |
657 |
fatal("unsupported node type in file %s: %d", file_id, p->pn_type); |
658 |
} |
659 |
if (p != node->pn_head) { |
660 |
Stream_write_string(f, ", "); |
661 |
} |
662 |
|
663 |
/* check whether this is a getter or setter */ |
664 |
switch (p->pn_op) { |
665 |
case JSOP_GETTER: |
666 |
case JSOP_SETTER: |
667 |
if (p->pn_op == JSOP_GETTER) { |
668 |
Stream_write_string(f, "get "); |
669 |
} |
670 |
else { |
671 |
Stream_write_string(f, "set "); |
672 |
} |
673 |
instrument_expression(p->pn_left, f); |
674 |
if (p->pn_right->pn_type != TOK_FUNCTION) { |
675 |
fatal("parse error: expected function"); |
676 |
} |
677 |
instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER); |
678 |
break; |
679 |
default: |
680 |
instrument_expression(p->pn_left, f); |
681 |
Stream_write_string(f, ": "); |
682 |
instrument_expression(p->pn_right, f); |
683 |
break; |
684 |
} |
685 |
} |
686 |
Stream_write_char(f, '}'); |
687 |
break; |
688 |
case TOK_RP: |
689 |
Stream_write_char(f, '('); |
690 |
instrument_expression(node->pn_kid, f); |
691 |
Stream_write_char(f, ')'); |
692 |
break; |
693 |
case TOK_NAME: |
694 |
print_string_atom(node->pn_atom, f); |
695 |
break; |
696 |
case TOK_STRING: |
697 |
print_quoted_string_atom(node->pn_atom, f); |
698 |
break; |
699 |
case TOK_REGEXP: |
700 |
assert(node->pn_op == JSOP_REGEXP); |
701 |
{ |
702 |
JSObject * object = node->pn_pob->object; |
703 |
jsval result; |
704 |
js_regexp_toString(context, object, &result); |
705 |
print_regex(result, f); |
706 |
} |
707 |
break; |
708 |
case TOK_NUMBER: |
709 |
/* |
710 |
A 64-bit IEEE 754 floating point number has a 52-bit fraction. |
711 |
2^(-52) = 2.22 x 10^(-16) |
712 |
Thus there are 16 significant digits. |
713 |
To keep the output simple, special-case zero. |
714 |
*/ |
715 |
if (node->pn_dval == 0.0) { |
716 |
Stream_write_string(f, "0"); |
717 |
} |
718 |
else { |
719 |
Stream_printf(f, "%.15g", node->pn_dval); |
720 |
} |
721 |
break; |
722 |
case TOK_PRIMARY: |
723 |
switch (node->pn_op) { |
724 |
case JSOP_TRUE: |
725 |
Stream_write_string(f, "true"); |
726 |
break; |
727 |
case JSOP_FALSE: |
728 |
Stream_write_string(f, "false"); |
729 |
break; |
730 |
case JSOP_NULL: |
731 |
Stream_write_string(f, "null"); |
732 |
break; |
733 |
case JSOP_THIS: |
734 |
Stream_write_string(f, "this"); |
735 |
break; |
736 |
/* jsscan.h mentions `super' ??? */ |
737 |
default: |
738 |
abort(); |
739 |
} |
740 |
break; |
741 |
case TOK_INSTANCEOF: |
742 |
instrument_expression(node->pn_left, f); |
743 |
Stream_write_string(f, " instanceof "); |
744 |
instrument_expression(node->pn_right, f); |
745 |
break; |
746 |
case TOK_IN: |
747 |
instrument_expression(node->pn_left, f); |
748 |
Stream_write_string(f, " in "); |
749 |
instrument_expression(node->pn_right, f); |
750 |
break; |
751 |
case TOK_LEXICALSCOPE: |
752 |
assert(node->pn_arity == PN_NAME); |
753 |
assert(node->pn_expr->pn_type == TOK_LET); |
754 |
assert(node->pn_expr->pn_arity == PN_BINARY); |
755 |
Stream_write_string(f, "let("); |
756 |
assert(node->pn_expr->pn_left->pn_type == TOK_LP); |
757 |
assert(node->pn_expr->pn_left->pn_arity == PN_LIST); |
758 |
instrument_declarations(node->pn_expr->pn_left, f); |
759 |
Stream_write_string(f, ") "); |
760 |
instrument_expression(node->pn_expr->pn_right, f); |
761 |
break; |
762 |
case TOK_YIELD: |
763 |
assert(node->pn_arity == PN_UNARY); |
764 |
Stream_write_string(f, "yield"); |
765 |
if (node->pn_kid != NULL) { |
766 |
Stream_write_char(f, ' '); |
767 |
instrument_expression(node->pn_kid, f); |
768 |
} |
769 |
break; |
770 |
case TOK_ARRAYCOMP: |
771 |
assert(node->pn_arity == PN_LIST); |
772 |
{ |
773 |
JSParseNode * block_node; |
774 |
switch (node->pn_count) { |
775 |
case 1: |
776 |
block_node = node->pn_head; |
777 |
break; |
778 |
case 2: |
779 |
block_node = node->pn_head->pn_next; |
780 |
break; |
781 |
default: |
782 |
abort(); |
783 |
break; |
784 |
} |
785 |
assert(block_node->pn_type == TOK_LEXICALSCOPE); |
786 |
assert(block_node->pn_arity == PN_NAME); |
787 |
JSParseNode * for_node = block_node->pn_expr; |
788 |
assert(for_node->pn_type == TOK_FOR); |
789 |
assert(for_node->pn_arity == PN_BINARY); |
790 |
JSParseNode * p = for_node; |
791 |
while (p->pn_type == TOK_FOR) { |
792 |
p = p->pn_right; |
793 |
} |
794 |
JSParseNode * if_node = NULL; |
795 |
JSParseNode * push_node; |
796 |
switch (p->pn_type) { |
797 |
case TOK_ARRAYPUSH: |
798 |
push_node = p; |
799 |
assert(push_node->pn_arity == PN_UNARY); |
800 |
break; |
801 |
case TOK_IF: |
802 |
if_node = p; |
803 |
assert(if_node->pn_arity == PN_TERNARY); |
804 |
push_node = if_node->pn_kid2; |
805 |
assert(push_node->pn_arity == PN_UNARY); |
806 |
break; |
807 |
default: |
808 |
abort(); |
809 |
break; |
810 |
} |
811 |
Stream_write_char(f, '['); |
812 |
instrument_expression(push_node->pn_kid, f); |
813 |
p = for_node; |
814 |
while (p->pn_type == TOK_FOR) { |
815 |
Stream_write_char(f, ' '); |
816 |
output_for_in(p, f); |
817 |
p = p->pn_right; |
818 |
} |
819 |
if (if_node) { |
820 |
Stream_write_string(f, " if ("); |
821 |
instrument_expression(if_node->pn_kid1, f); |
822 |
Stream_write_char(f, ')'); |
823 |
} |
824 |
Stream_write_char(f, ']'); |
825 |
} |
826 |
break; |
827 |
case TOK_VAR: |
828 |
assert(node->pn_arity == PN_LIST); |
829 |
Stream_write_string(f, "var "); |
830 |
instrument_declarations(node, f); |
831 |
break; |
832 |
case TOK_LET: |
833 |
assert(node->pn_arity == PN_LIST); |
834 |
Stream_write_string(f, "let "); |
835 |
instrument_declarations(node, f); |
836 |
break; |
837 |
default: |
838 |
fatal("unsupported node type in file %s: %d", file_id, node->pn_type); |
839 |
} |
840 |
} |
841 |
|
842 |
static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) { |
843 |
switch (node->pn_type) { |
844 |
case TOK_FUNCTION: |
845 |
instrument_function(node, f, indent, FUNCTION_NORMAL); |
846 |
break; |
847 |
case TOK_LC: |
848 |
assert(node->pn_arity == PN_LIST); |
849 |
/* |
850 |
Stream_write_string(f, "{\n"); |
851 |
*/ |
852 |
for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) { |
853 |
instrument_statement(p, f, indent, false); |
854 |
} |
855 |
/* |
856 |
Stream_printf(f, "%*s", indent, ""); |
857 |
Stream_write_string(f, "}\n"); |
858 |
*/ |
859 |
break; |
860 |
case TOK_IF: |
861 |
{ |
862 |
assert(node->pn_arity == PN_TERNARY); |
863 |
|
864 |
uint16_t line = node->pn_pos.begin.lineno; |
865 |
if (! is_jscoverage_if) { |
866 |
if (line > num_lines) { |
867 |
fatal("%s: script contains more than 65,535 lines", file_id); |
868 |
} |
869 |
if (line >= 2 && exclusive_directives[line - 2]) { |
870 |
is_jscoverage_if = true; |
871 |
} |
872 |
} |
873 |
|
874 |
Stream_printf(f, "%*s", indent, ""); |
875 |
Stream_write_string(f, "if ("); |
876 |
instrument_expression(node->pn_kid1, f); |
877 |
Stream_write_string(f, ") {\n"); |
878 |
if (is_jscoverage_if && node->pn_kid3) { |
879 |
uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno; |
880 |
uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1; |
881 |
Stream_printf(f, "%*s", indent + 2, ""); |
882 |
Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end); |
883 |
} |
884 |
instrument_statement(node->pn_kid2, f, indent + 2, false); |
885 |
Stream_printf(f, "%*s", indent, ""); |
886 |
Stream_write_string(f, "}\n"); |
887 |
|
888 |
if (node->pn_kid3 || is_jscoverage_if) { |
889 |
Stream_printf(f, "%*s", indent, ""); |
890 |
Stream_write_string(f, "else {\n"); |
891 |
|
892 |
if (is_jscoverage_if) { |
893 |
uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1; |
894 |
uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1; |
895 |
Stream_printf(f, "%*s", indent + 2, ""); |
896 |
Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end); |
897 |
} |
898 |
|
899 |
if (node->pn_kid3) { |
900 |
instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if); |
901 |
} |
902 |
|
903 |
Stream_printf(f, "%*s", indent, ""); |
904 |
Stream_write_string(f, "}\n"); |
905 |
} |
906 |
|
907 |
break; |
908 |
} |
909 |
case TOK_SWITCH: |
910 |
assert(node->pn_arity == PN_BINARY); |
911 |
Stream_printf(f, "%*s", indent, ""); |
912 |
Stream_write_string(f, "switch ("); |
913 |
instrument_expression(node->pn_left, f); |
914 |
Stream_write_string(f, ") {\n"); |
915 |
{ |
916 |
JSParseNode * list = node->pn_right; |
917 |
if (list->pn_type == TOK_LEXICALSCOPE) { |
918 |
list = list->pn_expr; |
919 |
} |
920 |
for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) { |
921 |
Stream_printf(f, "%*s", indent, ""); |
922 |
switch (p->pn_type) { |
923 |
case TOK_CASE: |
924 |
Stream_write_string(f, "case "); |
925 |
instrument_expression(p->pn_left, f); |
926 |
Stream_write_string(f, ":\n"); |
927 |
break; |
928 |
case TOK_DEFAULT: |
929 |
Stream_write_string(f, "default:\n"); |
930 |
break; |
931 |
default: |
932 |
abort(); |
933 |
break; |
934 |
} |
935 |
instrument_statement(p->pn_right, f, indent + 2, false); |
936 |
} |
937 |
} |
938 |
Stream_printf(f, "%*s", indent, ""); |
939 |
Stream_write_string(f, "}\n"); |
940 |
break; |
941 |
case TOK_CASE: |
942 |
case TOK_DEFAULT: |
943 |
abort(); |
944 |
break; |
945 |
case TOK_WHILE: |
946 |
assert(node->pn_arity == PN_BINARY); |
947 |
Stream_printf(f, "%*s", indent, ""); |
948 |
Stream_write_string(f, "while ("); |
949 |
instrument_expression(node->pn_left, f); |
950 |
Stream_write_string(f, ") {\n"); |
951 |
instrument_statement(node->pn_right, f, indent + 2, false); |
952 |
Stream_write_string(f, "}\n"); |
953 |
break; |
954 |
case TOK_DO: |
955 |
assert(node->pn_arity == PN_BINARY); |
956 |
Stream_printf(f, "%*s", indent, ""); |
957 |
Stream_write_string(f, "do {\n"); |
958 |
instrument_statement(node->pn_left, f, indent + 2, false); |
959 |
Stream_write_string(f, "}\n"); |
960 |
Stream_printf(f, "%*s", indent, ""); |
961 |
Stream_write_string(f, "while ("); |
962 |
instrument_expression(node->pn_right, f); |
963 |
Stream_write_string(f, ");\n"); |
964 |
break; |
965 |
case TOK_FOR: |
966 |
assert(node->pn_arity == PN_BINARY); |
967 |
Stream_printf(f, "%*s", indent, ""); |
968 |
switch (node->pn_left->pn_type) { |
969 |
case TOK_IN: |
970 |
/* for/in */ |
971 |
assert(node->pn_left->pn_arity == PN_BINARY); |
972 |
output_for_in(node, f); |
973 |
break; |
974 |
case TOK_RESERVED: |
975 |
/* for (;;) */ |
976 |
assert(node->pn_left->pn_arity == PN_TERNARY); |
977 |
Stream_write_string(f, "for ("); |
978 |
if (node->pn_left->pn_kid1) { |
979 |
instrument_expression(node->pn_left->pn_kid1, f); |
980 |
} |
981 |
Stream_write_string(f, ";"); |
982 |
if (node->pn_left->pn_kid2) { |
983 |
Stream_write_char(f, ' '); |
984 |
instrument_expression(node->pn_left->pn_kid2, f); |
985 |
} |
986 |
Stream_write_string(f, ";"); |
987 |
if (node->pn_left->pn_kid3) { |
988 |
Stream_write_char(f, ' '); |
989 |
instrument_expression(node->pn_left->pn_kid3, f); |
990 |
} |
991 |
Stream_write_char(f, ')'); |
992 |
break; |
993 |
default: |
994 |
abort(); |
995 |
break; |
996 |
} |
997 |
Stream_write_string(f, " {\n"); |
998 |
instrument_statement(node->pn_right, f, indent + 2, false); |
999 |
Stream_write_string(f, "}\n"); |
1000 |
break; |
1001 |
case TOK_THROW: |
1002 |
assert(node->pn_arity == PN_UNARY); |
1003 |
Stream_printf(f, "%*s", indent, ""); |
1004 |
Stream_write_string(f, "throw "); |
1005 |
instrument_expression(node->pn_u.unary.kid, f); |
1006 |
Stream_write_string(f, ";\n"); |
1007 |
break; |
1008 |
case TOK_TRY: |
1009 |
Stream_printf(f, "%*s", indent, ""); |
1010 |
Stream_write_string(f, "try {\n"); |
1011 |
instrument_statement(node->pn_kid1, f, indent + 2, false); |
1012 |
Stream_printf(f, "%*s", indent, ""); |
1013 |
Stream_write_string(f, "}\n"); |
1014 |
if (node->pn_kid2) { |
1015 |
assert(node->pn_kid2->pn_type == TOK_RESERVED); |
1016 |
for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) { |
1017 |
assert(scope->pn_type == TOK_LEXICALSCOPE); |
1018 |
JSParseNode * catch = scope->pn_expr; |
1019 |
assert(catch->pn_type == TOK_CATCH); |
1020 |
Stream_printf(f, "%*s", indent, ""); |
1021 |
Stream_write_string(f, "catch ("); |
1022 |
/* this may not be a name - destructuring assignment */ |
1023 |
/* |
1024 |
assert(catch->pn_kid1->pn_arity == PN_NAME); |
1025 |
print_string_atom(catch->pn_kid1->pn_atom, f); |
1026 |
*/ |
1027 |
instrument_expression(catch->pn_kid1, f); |
1028 |
if (catch->pn_kid2) { |
1029 |
Stream_write_string(f, " if "); |
1030 |
instrument_expression(catch->pn_kid2, f); |
1031 |
} |
1032 |
Stream_write_string(f, ") {\n"); |
1033 |
instrument_statement(catch->pn_kid3, f, indent + 2, false); |
1034 |
Stream_printf(f, "%*s", indent, ""); |
1035 |
Stream_write_string(f, "}\n"); |
1036 |
} |
1037 |
} |
1038 |
if (node->pn_kid3) { |
1039 |
Stream_printf(f, "%*s", indent, ""); |
1040 |
Stream_write_string(f, "finally {\n"); |
1041 |
instrument_statement(node->pn_kid3, f, indent + 2, false); |
1042 |
Stream_printf(f, "%*s", indent, ""); |
1043 |
Stream_write_string(f, "}\n"); |
1044 |
} |
1045 |
break; |
1046 |
case TOK_CATCH: |
1047 |
abort(); |
1048 |
break; |
1049 |
case TOK_BREAK: |
1050 |
case TOK_CONTINUE: |
1051 |
assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY); |
1052 |
Stream_printf(f, "%*s", indent, ""); |
1053 |
Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue"); |
1054 |
JSAtom * atom = node->pn_u.name.atom; |
1055 |
if (atom != NULL) { |
1056 |
Stream_write_char(f, ' '); |
1057 |
print_string_atom(node->pn_atom, f); |
1058 |
} |
1059 |
Stream_write_string(f, ";\n"); |
1060 |
break; |
1061 |
case TOK_WITH: |
1062 |
assert(node->pn_arity == PN_BINARY); |
1063 |
Stream_printf(f, "%*s", indent, ""); |
1064 |
Stream_write_string(f, "with ("); |
1065 |
instrument_expression(node->pn_left, f); |
1066 |
Stream_write_string(f, ") {\n"); |
1067 |
instrument_statement(node->pn_right, f, indent + 2, false); |
1068 |
Stream_printf(f, "%*s", indent, ""); |
1069 |
Stream_write_string(f, "}\n"); |
1070 |
break; |
1071 |
case TOK_VAR: |
1072 |
Stream_printf(f, "%*s", indent, ""); |
1073 |
instrument_expression(node, f); |
1074 |
Stream_write_string(f, ";\n"); |
1075 |
break; |
1076 |
case TOK_RETURN: |
1077 |
assert(node->pn_arity == PN_UNARY); |
1078 |
Stream_printf(f, "%*s", indent, ""); |
1079 |
Stream_write_string(f, "return"); |
1080 |
if (node->pn_kid != NULL) { |
1081 |
Stream_write_char(f, ' '); |
1082 |
instrument_expression(node->pn_kid, f); |
1083 |
} |
1084 |
Stream_write_string(f, ";\n"); |
1085 |
break; |
1086 |
case TOK_SEMI: |
1087 |
assert(node->pn_arity == PN_UNARY); |
1088 |
Stream_printf(f, "%*s", indent, ""); |
1089 |
if (node->pn_kid != NULL) { |
1090 |
instrument_expression(node->pn_kid, f); |
1091 |
} |
1092 |
Stream_write_string(f, ";\n"); |
1093 |
break; |
1094 |
case TOK_COLON: |
1095 |
assert(node->pn_arity == PN_NAME); |
1096 |
/* |
1097 |
This one is tricky: can't output instrumentation between the label and the |
1098 |
statement it's supposed to label ... |
1099 |
*/ |
1100 |
Stream_printf(f, "%*s", indent < 2? 0: indent - 2, ""); |
1101 |
print_string_atom(node->pn_atom, f); |
1102 |
Stream_write_string(f, ":\n"); |
1103 |
/* |
1104 |
... use output_statement instead of instrument_statement. |
1105 |
*/ |
1106 |
output_statement(node->pn_expr, f, indent, false); |
1107 |
break; |
1108 |
case TOK_LEXICALSCOPE: |
1109 |
/* let statement */ |
1110 |
assert(node->pn_arity == PN_NAME); |
1111 |
switch (node->pn_expr->pn_type) { |
1112 |
case TOK_LET: |
1113 |
/* let statement */ |
1114 |
assert(node->pn_expr->pn_arity == PN_BINARY); |
1115 |
instrument_statement(node->pn_expr, f, indent, false); |
1116 |
break; |
1117 |
case TOK_LC: |
1118 |
/* block */ |
1119 |
Stream_printf(f, "%*s", indent, ""); |
1120 |
Stream_write_string(f, "{\n"); |
1121 |
instrument_statement(node->pn_expr, f, indent + 2, false); |
1122 |
Stream_printf(f, "%*s", indent, ""); |
1123 |
Stream_write_string(f, "}\n"); |
1124 |
break; |
1125 |
case TOK_FOR: |
1126 |
instrument_statement(node->pn_expr, f, indent, false); |
1127 |
break; |
1128 |
default: |
1129 |
abort(); |
1130 |
break; |
1131 |
} |
1132 |
break; |
1133 |
case TOK_LET: |
1134 |
switch (node->pn_arity) { |
1135 |
case PN_BINARY: |
1136 |
/* let statement */ |
1137 |
Stream_printf(f, "%*s", indent, ""); |
1138 |
Stream_write_string(f, "let ("); |
1139 |
assert(node->pn_left->pn_type == TOK_LP); |
1140 |
assert(node->pn_left->pn_arity == PN_LIST); |
1141 |
instrument_declarations(node->pn_left, f); |
1142 |
Stream_write_string(f, ") {\n"); |
1143 |
instrument_statement(node->pn_right, f, indent + 2, false); |
1144 |
Stream_printf(f, "%*s", indent, ""); |
1145 |
Stream_write_string(f, "}\n"); |
1146 |
break; |
1147 |
case PN_LIST: |
1148 |
/* let definition */ |
1149 |
Stream_printf(f, "%*s", indent, ""); |
1150 |
instrument_expression(node, f); |
1151 |
Stream_write_string(f, ";\n"); |
1152 |
break; |
1153 |
default: |
1154 |
abort(); |
1155 |
break; |
1156 |
} |
1157 |
break; |
1158 |
case TOK_DEBUGGER: |
1159 |
Stream_printf(f, "%*s", indent, ""); |
1160 |
Stream_write_string(f, "debugger;\n"); |
1161 |
break; |
1162 |
default: |
1163 |
fatal("unsupported node type in file %s: %d", file_id, node->pn_type); |
1164 |
} |
1165 |
} |
1166 |
|
1167 |
/* |
1168 |
See <Statements> in jsparse.h. |
1169 |
TOK_FUNCTION is handled as a statement and as an expression. |
1170 |
TOK_EXPORT, TOK_IMPORT are not handled. |
1171 |
*/ |
1172 |
static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) { |
1173 |
if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) { |
1174 |
uint16_t line = node->pn_pos.begin.lineno; |
1175 |
if (line > num_lines) { |
1176 |
fatal("%s: script contains more than 65,535 lines", file_id); |
1177 |
} |
1178 |
|
1179 |
/* the root node has line number 0 */ |
1180 |
if (line != 0) { |
1181 |
Stream_printf(f, "%*s", indent, ""); |
1182 |
Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line); |
1183 |
lines[line - 1] = 1; |
1184 |
} |
1185 |
} |
1186 |
output_statement(node, f, indent, is_jscoverage_if); |
1187 |
} |
1188 |
|
1189 |
static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) { |
1190 |
const jschar * characters_end = characters + line_end; |
1191 |
const jschar * cp = characters + line_start; |
1192 |
const char * bp = prefix; |
1193 |
for (;;) { |
1194 |
if (*bp == '\0') { |
1195 |
return true; |
1196 |
} |
1197 |
else if (cp == characters_end) { |
1198 |
return false; |
1199 |
} |
1200 |
else if (*cp != *bp) { |
1201 |
return false; |
1202 |
} |
1203 |
bp++; |
1204 |
cp++; |
1205 |
} |
1206 |
} |
1207 |
|
1208 |
static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) { |
1209 |
/* XXX - other Unicode space */ |
1210 |
const jschar * end = characters + line_end; |
1211 |
for (const jschar * p = characters + line_start; p < end; p++) { |
1212 |
jschar c = *p; |
1213 |
if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) { |
1214 |
continue; |
1215 |
} |
1216 |
else { |
1217 |
return false; |
1218 |
} |
1219 |
} |
1220 |
return true; |
1221 |
} |
1222 |
|
1223 |
static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) { |
1224 |
fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message); |
1225 |
} |
1226 |
|
1227 |
void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) { |
1228 |
file_id = id; |
1229 |
|
1230 |
/* parse the javascript */ |
1231 |
JSParseContext parse_context; |
1232 |
if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) { |
1233 |
fatal("cannot create token stream from file: %s", file_id); |
1234 |
} |
1235 |
JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter); |
1236 |
JSParseNode * node = js_ParseScript(context, global, &parse_context); |
1237 |
if (node == NULL) { |
1238 |
js_ReportUncaughtException(context); |
1239 |
fatal("parse error in file: %s", file_id); |
1240 |
} |
1241 |
JS_SetErrorReporter(context, old_error_reporter); |
1242 |
num_lines = node->pn_pos.end.lineno; |
1243 |
lines = xmalloc(num_lines); |
1244 |
for (unsigned int i = 0; i < num_lines; i++) { |
1245 |
lines[i] = 0; |
1246 |
} |
1247 |
|
1248 |
/* search code for conditionals */ |
1249 |
exclusive_directives = xnew(bool, num_lines); |
1250 |
for (unsigned int i = 0; i < num_lines; i++) { |
1251 |
exclusive_directives[i] = false; |
1252 |
} |
1253 |
|
1254 |
bool has_conditionals = false; |
1255 |
struct IfDirective * if_directives = NULL; |
1256 |
size_t line_number = 0; |
1257 |
size_t i = 0; |
1258 |
while (i < num_characters) { |
1259 |
if (line_number == UINT16_MAX) { |
1260 |
fatal("%s: script has more than 65,535 lines", file_id); |
1261 |
} |
1262 |
line_number++; |
1263 |
size_t line_start = i; |
1264 |
jschar c; |
1265 |
bool done = false; |
1266 |
while (! done && i < num_characters) { |
1267 |
c = characters[i]; |
1268 |
switch (c) { |
1269 |
case '\r': |
1270 |
case '\n': |
1271 |
case 0x2028: |
1272 |
case 0x2029: |
1273 |
done = true; |
1274 |
break; |
1275 |
default: |
1276 |
i++; |
1277 |
} |
1278 |
} |
1279 |
size_t line_end = i; |
1280 |
if (i < num_characters) { |
1281 |
i++; |
1282 |
if (c == '\r' && i < num_characters && characters[i] == '\n') { |
1283 |
i++; |
1284 |
} |
1285 |
} |
1286 |
|
1287 |
if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) { |
1288 |
has_conditionals = true; |
1289 |
|
1290 |
if (characters_are_white_space(characters, line_start + 16, line_end)) { |
1291 |
exclusive_directives[line_number - 1] = true; |
1292 |
} |
1293 |
else { |
1294 |
struct IfDirective * if_directive = xnew(struct IfDirective, 1); |
1295 |
if_directive->condition_start = characters + line_start + 16; |
1296 |
if_directive->condition_end = characters + line_end; |
1297 |
if_directive->start_line = line_number; |
1298 |
if_directive->end_line = 0; |
1299 |
if_directive->next = if_directives; |
1300 |
if_directives = if_directive; |
1301 |
} |
1302 |
} |
1303 |
else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) { |
1304 |
for (struct IfDirective * p = if_directives; p != NULL; p = p->next) { |
1305 |
if (p->end_line == 0) { |
1306 |
p->end_line = line_number; |
1307 |
break; |
1308 |
} |
1309 |
} |
1310 |
} |
1311 |
} |
1312 |
|
1313 |
/* |
1314 |
An instrumented JavaScript file has 4 sections: |
1315 |
1. initialization |
1316 |
2. instrumented source code |
1317 |
3. conditionals |
1318 |
4. original source code |
1319 |
*/ |
1320 |
|
1321 |
Stream * instrumented = Stream_new(0); |
1322 |
instrument_statement(node, instrumented, 0, false); |
1323 |
js_FinishParseContext(context, &parse_context); |
1324 |
|
1325 |
/* write line number info to the output */ |
1326 |
Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n"); |
1327 |
Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n"); |
1328 |
Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n"); |
1329 |
Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id); |
1330 |
Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id); |
1331 |
for (int i = 0; i < num_lines; i++) { |
1332 |
if (lines[i]) { |
1333 |
Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1); |
1334 |
} |
1335 |
} |
1336 |
Stream_write_string(output, "}\n"); |
1337 |
free(lines); |
1338 |
lines = NULL; |
1339 |
free(exclusive_directives); |
1340 |
exclusive_directives = NULL; |
1341 |
|
1342 |
/* conditionals */ |
1343 |
if (has_conditionals) { |
1344 |
Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id); |
1345 |
} |
1346 |
|
1347 |
/* copy the instrumented source code to the output */ |
1348 |
Stream_write(output, instrumented->data, instrumented->length); |
1349 |
|
1350 |
/* conditionals */ |
1351 |
for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) { |
1352 |
Stream_write_string(output, "if (!("); |
1353 |
print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output); |
1354 |
Stream_write_string(output, ")) {\n"); |
1355 |
Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line); |
1356 |
Stream_write_string(output, "}\n"); |
1357 |
} |
1358 |
|
1359 |
/* free */ |
1360 |
while (if_directives != NULL) { |
1361 |
struct IfDirective * if_directive = if_directives; |
1362 |
if_directives = if_directives->next; |
1363 |
free(if_directive); |
1364 |
} |
1365 |
|
1366 |
/* copy the original source to the output */ |
1367 |
Stream_printf(output, "_$jscoverage['%s'].source = ", file_id); |
1368 |
jscoverage_write_source(id, characters, num_characters, output); |
1369 |
Stream_printf(output, ";\n"); |
1370 |
|
1371 |
Stream_delete(instrumented); |
1372 |
|
1373 |
file_id = NULL; |
1374 |
} |
1375 |
|
1376 |
void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) { |
1377 |
Stream_write_string(output, "["); |
1378 |
if (jscoverage_highlight) { |
1379 |
Stream * highlighted_stream = Stream_new(num_characters); |
1380 |
jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream); |
1381 |
size_t i = 0; |
1382 |
while (i < highlighted_stream->length) { |
1383 |
if (i > 0) { |
1384 |
Stream_write_char(output, ','); |
1385 |
} |
1386 |
|
1387 |
Stream_write_char(output, '"'); |
1388 |
bool done = false; |
1389 |
while (! done) { |
1390 |
char c = highlighted_stream->data[i]; |
1391 |
switch (c) { |
1392 |
case 0x8: |
1393 |
/* backspace */ |
1394 |
Stream_write_string(output, "\\b"); |
1395 |
break; |
1396 |
case 0x9: |
1397 |
/* horizontal tab */ |
1398 |
Stream_write_string(output, "\\t"); |
1399 |
break; |
1400 |
case 0xa: |
1401 |
/* line feed (new line) */ |
1402 |
done = true; |
1403 |
break; |
1404 |
/* IE doesn't support this */ |
1405 |
/* |
1406 |
case 0xb: |
1407 |
Stream_write_string(output, "\\v"); |
1408 |
break; |
1409 |
*/ |
1410 |
case 0xc: |
1411 |
/* form feed */ |
1412 |
Stream_write_string(output, "\\f"); |
1413 |
break; |
1414 |
case 0xd: |
1415 |
/* carriage return */ |
1416 |
done = true; |
1417 |
if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') { |
1418 |
i++; |
1419 |
} |
1420 |
break; |
1421 |
case '"': |
1422 |
Stream_write_string(output, "\\\""); |
1423 |
break; |
1424 |
case '\\': |
1425 |
Stream_write_string(output, "\\\\"); |
1426 |
break; |
1427 |
default: |
1428 |
Stream_write_char(output, c); |
1429 |
break; |
1430 |
} |
1431 |
i++; |
1432 |
if (i >= highlighted_stream->length) { |
1433 |
done = true; |
1434 |
} |
1435 |
} |
1436 |
Stream_write_char(output, '"'); |
1437 |
} |
1438 |
Stream_delete(highlighted_stream); |
1439 |
} |
1440 |
else { |
1441 |
size_t i = 0; |
1442 |
while (i < num_characters) { |
1443 |
if (i > 0) { |
1444 |
Stream_write_char(output, ','); |
1445 |
} |
1446 |
|
1447 |
Stream_write_char(output, '"'); |
1448 |
bool done = false; |
1449 |
while (! done) { |
1450 |
jschar c = characters[i]; |
1451 |
switch (c) { |
1452 |
case 0x8: |
1453 |
/* backspace */ |
1454 |
Stream_write_string(output, "\\b"); |
1455 |
break; |
1456 |
case 0x9: |
1457 |
/* horizontal tab */ |
1458 |
Stream_write_string(output, "\\t"); |
1459 |
break; |
1460 |
case 0xa: |
1461 |
/* line feed (new line) */ |
1462 |
done = true; |
1463 |
break; |
1464 |
/* IE doesn't support this */ |
1465 |
/* |
1466 |
case 0xb: |
1467 |
Stream_write_string(output, "\\v"); |
1468 |
break; |
1469 |
*/ |
1470 |
case 0xc: |
1471 |
/* form feed */ |
1472 |
Stream_write_string(output, "\\f"); |
1473 |
break; |
1474 |
case 0xd: |
1475 |
/* carriage return */ |
1476 |
done = true; |
1477 |
if (i + 1 < num_characters && characters[i + 1] == '\n') { |
1478 |
i++; |
1479 |
} |
1480 |
break; |
1481 |
case '"': |
1482 |
Stream_write_string(output, "\\\""); |
1483 |
break; |
1484 |
case '\\': |
1485 |
Stream_write_string(output, "\\\\"); |
1486 |
break; |
1487 |
case '&': |
1488 |
Stream_write_string(output, "&"); |
1489 |
break; |
1490 |
case '<': |
1491 |
Stream_write_string(output, "<"); |
1492 |
break; |
1493 |
case '>': |
1494 |
Stream_write_string(output, ">"); |
1495 |
break; |
1496 |
case 0x2028: |
1497 |
case 0x2029: |
1498 |
done = true; |
1499 |
break; |
1500 |
default: |
1501 |
if (32 <= c && c <= 126) { |
1502 |
Stream_write_char(output, c); |
1503 |
} |
1504 |
else { |
1505 |
Stream_printf(output, "&#%d;", c); |
1506 |
} |
1507 |
break; |
1508 |
} |
1509 |
i++; |
1510 |
if (i >= num_characters) { |
1511 |
done = true; |
1512 |
} |
1513 |
} |
1514 |
Stream_write_char(output, '"'); |
1515 |
} |
1516 |
} |
1517 |
Stream_write_string(output, "]"); |
1518 |
} |
1519 |
|
1520 |
void jscoverage_copy_resources(const char * destination_directory) { |
1521 |
copy_resource("jscoverage.html", destination_directory); |
1522 |
copy_resource("jscoverage.css", destination_directory); |
1523 |
copy_resource("jscoverage.js", destination_directory); |
1524 |
copy_resource("jscoverage-ie.css", destination_directory); |
1525 |
copy_resource("jscoverage-throbber.gif", destination_directory); |
1526 |
copy_resource("jscoverage-highlight.css", destination_directory); |
1527 |
} |
1528 |
|
1529 |
/* |
1530 |
coverage reports |
1531 |
*/ |
1532 |
|
1533 |
struct FileCoverageList { |
1534 |
FileCoverage * file_coverage; |
1535 |
struct FileCoverageList * next; |
1536 |
}; |
1537 |
|
1538 |
struct Coverage { |
1539 |
JSHashTable * coverage_table; |
1540 |
struct FileCoverageList * coverage_list; |
1541 |
}; |
1542 |
|
1543 |
static int compare_strings(const void * p1, const void * p2) { |
1544 |
return strcmp(p1, p2) == 0; |
1545 |
} |
1546 |
|
1547 |
Coverage * Coverage_new(void) { |
1548 |
Coverage * result = xmalloc(sizeof(Coverage)); |
1549 |
result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL); |
1550 |
if (result->coverage_table == NULL) { |
1551 |
fatal("cannot create hash table"); |
1552 |
} |
1553 |
result->coverage_list = NULL; |
1554 |
return result; |
1555 |
} |
1556 |
|
1557 |
void Coverage_delete(Coverage * coverage) { |
1558 |
JS_HashTableDestroy(coverage->coverage_table); |
1559 |
struct FileCoverageList * p = coverage->coverage_list; |
1560 |
while (p != NULL) { |
1561 |
free(p->file_coverage->coverage_lines); |
1562 |
if (p->file_coverage->source_lines != NULL) { |
1563 |
for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) { |
1564 |
free(p->file_coverage->source_lines[i]); |
1565 |
} |
1566 |
free(p->file_coverage->source_lines); |
1567 |
} |
1568 |
free(p->file_coverage->id); |
1569 |
free(p->file_coverage); |
1570 |
struct FileCoverageList * q = p; |
1571 |
p = p->next; |
1572 |
free(q); |
1573 |
} |
1574 |
free(coverage); |
1575 |
} |
1576 |
|
1577 |
struct EnumeratorArg { |
1578 |
CoverageForeachFunction f; |
1579 |
void * p; |
1580 |
}; |
1581 |
|
1582 |
static intN enumerator(JSHashEntry * entry, intN i, void * arg) { |
1583 |
struct EnumeratorArg * enumerator_arg = arg; |
1584 |
enumerator_arg->f(entry->value, i, enumerator_arg->p); |
1585 |
return 0; |
1586 |
} |
1587 |
|
1588 |
void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) { |
1589 |
struct EnumeratorArg enumerator_arg; |
1590 |
enumerator_arg.f = f; |
1591 |
enumerator_arg.p = p; |
1592 |
JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg); |
1593 |
} |
1594 |
|
1595 |
int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) { |
1596 |
int result = 0; |
1597 |
|
1598 |
jschar * base = js_InflateString(context, (char *) json, &length); |
1599 |
if (base == NULL) { |
1600 |
fatal("out of memory"); |
1601 |
} |
1602 |
|
1603 |
jschar * parenthesized_json = xnew(jschar, addst(length, 2)); |
1604 |
parenthesized_json[0] = '('; |
1605 |
memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar))); |
1606 |
parenthesized_json[length + 1] = ')'; |
1607 |
|
1608 |
JS_free(context, base); |
1609 |
|
1610 |
JSParseContext parse_context; |
1611 |
if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) { |
1612 |
free(parenthesized_json); |
1613 |
return -1; |
1614 |
} |
1615 |
JSParseNode * root = js_ParseScript(context, global, &parse_context); |
1616 |
free(parenthesized_json); |
1617 |
if (root == NULL) { |
1618 |
result = -1; |
1619 |
goto done; |
1620 |
} |
1621 |
|
1622 |
/* root node must be TOK_LC */ |
1623 |
if (root->pn_type != TOK_LC) { |
1624 |
result = -1; |
1625 |
goto done; |
1626 |
} |
1627 |
JSParseNode * semi = root->pn_u.list.head; |
1628 |
|
1629 |
/* the list must be TOK_SEMI and it must contain only one element */ |
1630 |
if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) { |
1631 |
result = -1; |
1632 |
goto done; |
1633 |
} |
1634 |
JSParseNode * parenthesized = semi->pn_kid; |
1635 |
|
1636 |
/* this must be a parenthesized expression */ |
1637 |
if (parenthesized->pn_type != TOK_RP) { |
1638 |
result = -1; |
1639 |
goto done; |
1640 |
} |
1641 |
JSParseNode * object = parenthesized->pn_kid; |
1642 |
|
1643 |
/* this must be an object literal */ |
1644 |
if (object->pn_type != TOK_RC) { |
1645 |
result = -1; |
1646 |
goto done; |
1647 |
} |
1648 |
|
1649 |
for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) { |
1650 |
/* every element of this list must be TOK_COLON */ |
1651 |
if (p->pn_type != TOK_COLON) { |
1652 |
result = -1; |
1653 |
goto done; |
1654 |
} |
1655 |
|
1656 |
/* the key must be a string representing the file */ |
1657 |
JSParseNode * key = p->pn_left; |
1658 |
if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) { |
1659 |
result = -1; |
1660 |
goto done; |
1661 |
} |
1662 |
char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom)); |
1663 |
|
1664 |
/* the value must be an object literal OR an array */ |
1665 |
JSParseNode * value = p->pn_right; |
1666 |
if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) { |
1667 |
result = -1; |
1668 |
goto done; |
1669 |
} |
1670 |
|
1671 |
JSParseNode * array = NULL; |
1672 |
JSParseNode * source = NULL; |
1673 |
if (value->pn_type == TOK_RB) { |
1674 |
/* an array */ |
1675 |
array = value; |
1676 |
} |
1677 |
else if (value->pn_type == TOK_RC) { |
1678 |
/* an object literal */ |
1679 |
if (value->pn_count != 2) { |
1680 |
result = -1; |
1681 |
goto done; |
1682 |
} |
1683 |
for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) { |
1684 |
if (element->pn_type != TOK_COLON) { |
1685 |
result = -1; |
1686 |
goto done; |
1687 |
} |
1688 |
JSParseNode * left = element->pn_left; |
1689 |
if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) { |
1690 |
result = -1; |
1691 |
goto done; |
1692 |
} |
1693 |
const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom)); |
1694 |
if (strcmp(s, "coverage") == 0) { |
1695 |
array = element->pn_right; |
1696 |
if (array->pn_type != TOK_RB) { |
1697 |
result = -1; |
1698 |
goto done; |
1699 |
} |
1700 |
} |
1701 |
else if (strcmp(s, "source") == 0) { |
1702 |
source = element->pn_right; |
1703 |
if (source->pn_type != TOK_RB) { |
1704 |
result = -1; |
1705 |
goto done; |
1706 |
} |
1707 |
} |
1708 |
else { |
1709 |
result = -1; |
1710 |
goto done; |
1711 |
} |
1712 |
} |
1713 |
} |
1714 |
else { |
1715 |
result = -1; |
1716 |
goto done; |
1717 |
} |
1718 |
|
1719 |
if (array == NULL) { |
1720 |
result = -1; |
1721 |
goto done; |
1722 |
} |
1723 |
|
1724 |
/* look up the file in the coverage table */ |
1725 |
FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes); |
1726 |
if (file_coverage == NULL) { |
1727 |
/* not there: create a new one */ |
1728 |
char * id = xstrdup(id_bytes); |
1729 |
file_coverage = xmalloc(sizeof(FileCoverage)); |
1730 |
file_coverage->id = id; |
1731 |
file_coverage->num_coverage_lines = array->pn_count; |
1732 |
file_coverage->coverage_lines = xnew(int, array->pn_count); |
1733 |
file_coverage->source_lines = NULL; |
1734 |
|
1735 |
/* set coverage for all lines */ |
1736 |
uint32 i = 0; |
1737 |
for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) { |
1738 |
if (element->pn_type == TOK_NUMBER) { |
1739 |
file_coverage->coverage_lines[i] = (int) element->pn_dval; |
1740 |
} |
1741 |
else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) { |
1742 |
file_coverage->coverage_lines[i] = -1; |
1743 |
} |
1744 |
else { |
1745 |
result = -1; |
1746 |
goto done; |
1747 |
} |
1748 |
} |
1749 |
assert(i == array->pn_count); |
1750 |
|
1751 |
/* add to the hash table */ |
1752 |
JS_HashTableAdd(coverage->coverage_table, id, file_coverage); |
1753 |
struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList)); |
1754 |
coverage_list->file_coverage = file_coverage; |
1755 |
coverage_list->next = coverage->coverage_list; |
1756 |
coverage->coverage_list = coverage_list; |
1757 |
} |
1758 |
else { |
1759 |
/* sanity check */ |
1760 |
assert(strcmp(file_coverage->id, id_bytes) == 0); |
1761 |
if (file_coverage->num_coverage_lines != array->pn_count) { |
1762 |
result = -2; |
1763 |
goto done; |
1764 |
} |
1765 |
|
1766 |
/* merge the coverage */ |
1767 |
uint32 i = 0; |
1768 |
for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) { |
1769 |
if (element->pn_type == TOK_NUMBER) { |
1770 |
if (file_coverage->coverage_lines[i] == -1) { |
1771 |
result = -2; |
1772 |
goto done; |
1773 |
} |
1774 |
file_coverage->coverage_lines[i] += (int) element->pn_dval; |
1775 |
} |
1776 |
else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) { |
1777 |
if (file_coverage->coverage_lines[i] != -1) { |
1778 |
result = -2; |
1779 |
goto done; |
1780 |
} |
1781 |
} |
1782 |
else { |
1783 |
result = -1; |
1784 |
goto done; |
1785 |
} |
1786 |
} |
1787 |
assert(i == array->pn_count); |
1788 |
} |
1789 |
|
1790 |
/* if this JSON file has source, use it */ |
1791 |
if (file_coverage->source_lines == NULL && source != NULL) { |
1792 |
file_coverage->num_source_lines = source->pn_count; |
1793 |
file_coverage->source_lines = xnew(char *, source->pn_count); |
1794 |
uint32 i = 0; |
1795 |
for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) { |
1796 |
if (element->pn_type != TOK_STRING) { |
1797 |
result = -1; |
1798 |
goto done; |
1799 |
} |
1800 |
file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom))); |
1801 |
} |
1802 |
assert(i == source->pn_count); |
1803 |
} |
1804 |
} |
1805 |
|
1806 |
done: |
1807 |
js_FinishParseContext(context, &parse_context); |
1808 |
return result; |
1809 |
} |