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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
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* vim: set ts=8 sw=4 et tw=80: |
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* |
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* ***** BEGIN LICENSE BLOCK ***** |
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1 |
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* |
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* The contents of this file are subject to the Mozilla Public License Version |
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* 1.1 (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* http://www.mozilla.org/MPL/ |
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* |
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* Software distributed under the License is distributed on an "AS IS" basis, |
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License |
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* for the specific language governing rights and limitations under the |
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* License. |
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* |
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* Copyright (C) 2007 Sun Microsystems, Inc. All Rights Reserved. |
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* |
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* Contributor(s): |
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* Brendan Eich <brendan@mozilla.org> |
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* |
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* Alternatively, the contents of this file may be used under the terms of |
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* either of the GNU General Public License Version 2 or later (the "GPL"), |
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), |
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* in which case the provisions of the GPL or the LGPL are applicable instead |
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* of those above. If you wish to allow use of your version of this file only |
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* under the terms of either the GPL or the LGPL, and not to allow others to |
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* use your version of this file under the terms of the MPL, indicate your |
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* decision by deleting the provisions above and replace them with the notice |
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* and other provisions required by the GPL or the LGPL. If you do not delete |
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* the provisions above, a recipient may use your version of this file under |
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* the terms of any one of the MPL, the GPL or the LGPL. |
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* |
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* ***** END LICENSE BLOCK ***** */ |
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|
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#include "jsapi.h" |
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#include "jsutil.h" |
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#include "jsatom.h" |
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#include "jscntxt.h" |
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#include "jsdbgapi.h" |
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#include "jsfun.h" |
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#include "jsinterp.h" |
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#include "jsobj.h" |
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#include "jsscript.h" |
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#include "jsstr.h" |
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|
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#include "jsdtracef.h" |
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#include <sys/types.h> |
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|
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#define TYPEOF(cx,v) (JSVAL_IS_NULL(v) ? JSTYPE_NULL : JS_TypeOfValue(cx,v)) |
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|
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static char dempty[] = "<null>"; |
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|
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char * |
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jsdtrace_funcclass_name(JSFunction *fun) |
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{ |
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return (!FUN_INTERPRETED(fun) && |
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!(fun->flags & JSFUN_TRACEABLE) && |
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FUN_CLASP(fun)) |
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? (char *)FUN_CLASP(fun)->name |
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: dempty; |
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} |
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|
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char * |
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jsdtrace_filename(JSStackFrame *fp) |
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{ |
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while (fp && fp->script == NULL) |
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fp = fp->down; |
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return (fp && fp->script && fp->script->filename) |
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? (char *)fp->script->filename |
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: dempty; |
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} |
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|
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int |
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jsdtrace_linenumber(JSContext *cx, JSStackFrame *fp) |
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{ |
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while (fp && fp->script == NULL) |
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fp = fp->down; |
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return (fp && fp->regs) |
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? (int) js_PCToLineNumber(cx, fp->script, fp->regs->pc) |
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: -1; |
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} |
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|
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/* |
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* This function is used to convert function arguments and return value (jsval) |
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* into the following based on each value's type tag: |
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* |
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* jsval returned |
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* ------------------- |
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* STRING -> char * |
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* INT -> int |
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* DOUBLE -> double * |
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* BOOLEAN -> int |
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* OBJECT -> void * |
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* |
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* All are presented as void * for DTrace consumers to use, after shifting or |
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* masking out the JavaScript type bits. This allows D scripts to use ints and |
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* booleans directly and copyinstr() for string arguments, when types are known |
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* beforehand. |
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* |
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* This is used by the function-args and function-rval probes, which also |
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* provide raw (unmasked) jsvals should type info be useful from D scripts. |
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*/ |
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void * |
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jsdtrace_jsvaltovoid(JSContext *cx, jsval argval) |
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{ |
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JSType type = TYPEOF(cx, argval); |
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|
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switch (type) { |
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case JSTYPE_NULL: |
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case JSTYPE_VOID: |
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return (void *)JS_TYPE_STR(type); |
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|
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case JSTYPE_BOOLEAN: |
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return (void *)JSVAL_TO_BOOLEAN(argval); |
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|
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case JSTYPE_STRING: |
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return (void *)js_GetStringBytes(cx, JSVAL_TO_STRING(argval)); |
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|
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case JSTYPE_NUMBER: |
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if (JSVAL_IS_INT(argval)) |
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return (void *)JSVAL_TO_INT(argval); |
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return JSVAL_TO_DOUBLE(argval); |
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|
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default: |
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return JSVAL_TO_GCTHING(argval); |
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} |
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/* NOTREACHED */ |
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} |
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|
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char * |
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jsdtrace_function_name(JSContext *cx, JSStackFrame *fp, JSFunction *fun) |
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{ |
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JSAtom *atom; |
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JSFrameRegs *regs; |
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JSScript *script; |
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jsbytecode *pc; |
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char *name; |
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|
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atom = fun->atom; |
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if (!atom) { |
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if (fp->fun != fun || !fp->down) |
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return dempty; |
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|
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regs = fp->down->regs; |
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if (!regs) |
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return dempty; |
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|
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/* |
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* An anonymous function called from an active script or interpreted |
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* function: try to fetch the variable or property name by which the |
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* anonymous function was invoked. |
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*/ |
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pc = regs->pc; |
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script = fp->down->script; |
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switch ((JSOp) *pc) { |
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case JSOP_CALL: |
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case JSOP_EVAL: |
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JS_ASSERT(fp->argv == regs->sp - (int)GET_ARGC(pc)); |
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|
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/* |
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* FIXME bug 422864: update this code to use the pc stack from the |
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* decompiler. |
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*/ |
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break; |
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default: ; |
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} |
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|
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switch ((JSOp) *pc) { |
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case JSOP_CALLNAME: |
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case JSOP_CALLPROP: |
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case JSOP_NAME: |
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case JSOP_SETNAME: |
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case JSOP_GETPROP: |
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case JSOP_SETPROP: |
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GET_ATOM_FROM_BYTECODE(script, pc, 0, atom); |
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break; |
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|
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case JSOP_CALLELEM: |
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case JSOP_GETELEM: |
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case JSOP_SETELEM: |
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case JSOP_CALLGVAR: |
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case JSOP_GETGVAR: |
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case JSOP_SETGVAR: |
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case JSOP_CALLARG: |
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case JSOP_CALLLOCAL: |
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/* FIXME: try to recover a name from these ops. */ |
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/* FALL THROUGH */ |
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|
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default: |
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return dempty; |
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} |
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} |
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|
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name = (char *)js_GetStringBytes(cx, ATOM_TO_STRING(atom)); |
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return name ? name : dempty; |
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} |
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|
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/* |
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* These functions call the DTrace macros for the JavaScript USDT probes. |
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* Originally this code was inlined in the JavaScript code; however since |
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* a number of operations are called, these have been placed into functions |
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* to reduce any negative compiler optimization effect that the addition of |
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* a number of usually unused lines of code would cause. |
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*/ |
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void |
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jsdtrace_function_entry(JSContext *cx, JSStackFrame *fp, JSFunction *fun) |
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{ |
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JAVASCRIPT_FUNCTION_ENTRY( |
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jsdtrace_filename(fp), |
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jsdtrace_funcclass_name(fun), |
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jsdtrace_function_name(cx, fp, fun) |
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); |
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} |
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|
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void |
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jsdtrace_function_info(JSContext *cx, JSStackFrame *fp, JSStackFrame *dfp, |
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JSFunction *fun) |
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{ |
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JAVASCRIPT_FUNCTION_INFO( |
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jsdtrace_filename(fp), |
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jsdtrace_funcclass_name(fun), |
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jsdtrace_function_name(cx, fp, fun), |
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fp->script->lineno, |
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jsdtrace_filename(dfp), |
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jsdtrace_linenumber(cx, dfp) |
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); |
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} |
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|
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void |
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jsdtrace_function_args(JSContext *cx, JSStackFrame *fp, JSFunction *fun) |
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{ |
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JAVASCRIPT_FUNCTION_ARGS( |
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jsdtrace_filename(fp), |
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jsdtrace_funcclass_name(fun), |
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jsdtrace_function_name(cx, fp, fun), |
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fp->argc, (void *)fp->argv, |
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(fp->argc > 0) ? jsdtrace_jsvaltovoid(cx, fp->argv[0]) : 0, |
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(fp->argc > 1) ? jsdtrace_jsvaltovoid(cx, fp->argv[1]) : 0, |
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(fp->argc > 2) ? jsdtrace_jsvaltovoid(cx, fp->argv[2]) : 0, |
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(fp->argc > 3) ? jsdtrace_jsvaltovoid(cx, fp->argv[3]) : 0, |
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(fp->argc > 4) ? jsdtrace_jsvaltovoid(cx, fp->argv[4]) : 0 |
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); |
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} |
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|
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void |
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jsdtrace_function_rval(JSContext *cx, JSStackFrame *fp, JSFunction *fun) |
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{ |
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JAVASCRIPT_FUNCTION_RVAL( |
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jsdtrace_filename(fp), |
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jsdtrace_funcclass_name(fun), |
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jsdtrace_function_name(cx, fp, fun), |
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jsdtrace_linenumber(cx, fp), (void *)fp->rval, |
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jsdtrace_jsvaltovoid(cx, fp->rval) |
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); |
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} |
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|
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void |
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jsdtrace_function_return(JSContext *cx, JSStackFrame *fp, JSFunction *fun) |
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{ |
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JAVASCRIPT_FUNCTION_RETURN( |
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jsdtrace_filename(fp), |
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jsdtrace_funcclass_name(fun), |
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jsdtrace_function_name(cx, fp, fun) |
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); |
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} |
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|
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void |
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jsdtrace_object_create_start(JSStackFrame *fp, JSClass *clasp) |
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{ |
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JAVASCRIPT_OBJECT_CREATE_START(jsdtrace_filename(fp), (char *)clasp->name); |
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} |
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|
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void |
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jsdtrace_object_create_done(JSStackFrame *fp, JSClass *clasp) |
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{ |
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JAVASCRIPT_OBJECT_CREATE_DONE(jsdtrace_filename(fp), (char *)clasp->name); |
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} |
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|
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void |
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jsdtrace_object_create(JSContext *cx, JSClass *clasp, JSObject *obj) |
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{ |
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JAVASCRIPT_OBJECT_CREATE( |
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jsdtrace_filename(cx->fp), |
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(char *)clasp->name, |
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(uintptr_t)obj, |
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jsdtrace_linenumber(cx, cx->fp) |
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); |
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} |
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|
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void |
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jsdtrace_object_finalize(JSObject *obj) |
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{ |
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JSClass *clasp; |
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|
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clasp = LOCKED_OBJ_GET_CLASS(obj); |
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|
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/* the first arg is NULL - reserved for future use (filename?) */ |
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JAVASCRIPT_OBJECT_FINALIZE(NULL, (char *)clasp->name, (uintptr_t)obj); |
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} |
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|
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void |
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jsdtrace_execute_start(JSScript *script) |
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{ |
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JAVASCRIPT_EXECUTE_START( |
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script->filename ? (char *)script->filename : dempty, |
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script->lineno |
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); |
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} |
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|
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void |
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jsdtrace_execute_done(JSScript *script) |
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{ |
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JAVASCRIPT_EXECUTE_DONE( |
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script->filename ? (char *)script->filename : dempty, |
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script->lineno |
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); |
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} |
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