- Fix scope chain for nested functions at top-level (JSOP_DEFFUN), in a part of another statement (JSOP_CLOSURE), and unnamed in an expression (JSOP_ANONFUNOBJ) to match ECMA-262 13.2. My bad: fp->varobj was used up till now, instead of fp->scopeChain; we still *bind* the name of a statement-level (top or not) nested function in fp->varobj. This fixes bug 69559. (r=rogerl, sr=jband)
- Add an Intern command to the shell, for GC vs. intern'ed atom testing.
- Optimize compile (parse+emit) operation to generate code for each top-level
statement or function in turn, recycling JSParseNodes as we go for greatly
reduced "long linear script" footprint.
- Fix O(n**2) growth problems in bytecode and srcnote generation.
- Add js_ParseTokenStream entry point to compiler, for tree-generation without
code-generation. Move JSOP_EVAL instruction selection from code-generator to
parser, to match other such specializations and enable js_ParseTokenStream.
- Fix js_CompileTokenStream (and get it right in new js_ParseTokenStream) to
respect JSOPTION_VAROBJFIX.
- Clean up bracing, multi-line conditions, and overlong lines.
- Optimize integer ++ and -- to avoid double-to-int, which is quite costly for
some compilers (ftol on Windows with MSVC).
- Optimized arguments[i] and arguments.length references to use bytecodes that
avoid creating an arguments object for the current frame. This entailed
simplifying the compiler to avoid flagging functions and scripts that set
arguments, since we have code in jsfun.c to catch such sets at runtime.
- The code generator now eliminates useless expression statements, giving a
strict warning about them.
- Rationalized jsemit.c's LookupArgOrVar to have well-defined results in *pn.
Eliminate bytecode specializations for argument and local variable gets and
sets from jsparse.c -- these precede jsemit.c's LookupArgOrVar and frustrate
it, by setting pn_slot non-negative too early.
- Code generation errors set report->filename and report->lineno, rather than
hacking "{0}, line {1}: " into the localized message.
- Bogus JSFRAME_VAROBJBUG removed, JSOPTION_VAROBJFIX is sufficient.
- Spruce up jsinterp.c macros to use JS_BEGIN/END_MACRO brackets if possible.
- Avoid calling JS_PropertyStub. The call is too costly compared to a branch
in the caller.
- Optimize integer ++ and -- to avoid double-to-int, which is quite costly for
some compilers (ftol on Windows with MSVC).
- Optimized arguments[i] and arguments.length references to use bytecodes that
avoid creating an arguments object for the current frame. This entailed
simplifying the compiler to avoid flagging functions and scripts that set
arguments, since we have code in jsfun.c to catch such sets at runtime.
- The code generator now eliminates useless expression statements, giving a
strict warning about them.
- Rationalized jsemit.c's LookupArgOrVar to have well-defined results in *pn.
- Code generation errors set report->filename and report->lineno, rather than
hacking "{0}, line {1}: " into the localized message.
- Bogus JSFRAME_VAROBJBUG removed, JSOPTION_VAROBJFIX is sufficient.
- Spruce up jsinterp.c macros to use JS_BEGIN/END_MACRO brackets if possible.
- Avoid calling JS_PropertyStub. The call is too costly compared to a branch
in the caller.
- #if JS_HAS_LVALUE_RETURN around cx->rval2/rval2set defs and uses.
- Instrument different kinds of invocations, #ifdef DEBUG only.
- Clean up basis case of empty switch statement to use high = -1, low = 0,
requiring care when optimizing in-range tests using unsigned casts, but
freeing the interpreter and decompiler from having to do an extra test
before looping from low to high.
- Clean up all codegen to use JUMP_OFFSET_LEN, ATOM_INDEX_LEN, etc. instead of
magic 2 or 4.
- Add JSOP_TRY and JSOP_FINALLY no-ops to save a srcnote per JSOP_NOP, and to
make decompilation and jit'ing easier.
- Minimize number of source notes to maximize SRC_XDELTA span.
- Use JSSCRIPT_FIND_CATCH_START in throw code.
- Indentation and bracing nits picked.
- jsinterp.c changes:
__- JSOP_CLOSURE comment fixes.
____(NB: ECMA ed 3 seems to require that we abolish the Closure object altogether, replacing it with a new Function object where we used to make a new closure. That says we should use JS_CloneFunctionObject or an internal form (js_).)
__- Use obj rather than the same-valued fp->scopeChain as fourth argument to js_ConstructObject.
__- JSOP_DEFFUN change to auto-clone when running a script in a different scope from the one the compiler used for static function scope linkage.
__- Remove bogus assertion from JSOP_DEFVAR/CONST: case.
- jsparse.c/.h changes:
__- Restored outerFun test to FunctionDef in jsparse.c, so that we make a closure if (outerFun || lambda || !funAtom) -- i.e., if we're compiling
____- A function statement within an active function via eval;
____- We're compiling a function expression statement (not at apparent-to-compiler top-level; part of some kind of compound statement, e.g. if or with);
____- Or the function, even at top statement level and not in another function, has no name.
__- Don't predefine local variables at compile time if they're in with statement
__- Enforce const at compile time for local consts
- Minor jsemit.[ch] cleanup.
+ merging of js/src and js/ref
+ elimination of most dependencies on NSPR
+ JS1.4 feature additions and accumulated bug fixes
More details are in last week's mozilla status report.
and development branches, including but
not limited to:
- Preliminary exception handling per
ECMA proposal; try, multiple
catchblocks, and finally. Catchblocks
are of the form catch (v) or
catch(v:<guard>), where guard is an
optional boolean expression that is
evaluated to determine whether the
exception is to be caught by that block.
- ECMA-proposed 'in' operator; "'foo' in
o" or "4 in o" asks if o has property
foo or element 4.
- Added a new set of defines in
jsconfig.h for js 1.4
features-in-progress. (in, instanceof,
exception handling.) Default build
version is now 1.4. Fixed a few
conditional features that had become
broken.
- Progress towards porting to FreeBSD
and Alpha; casts of NaN and friends to
int are a little more localized. Not
there yet...
- New config files to compile on more
OSes; various fixes to improve
portability.
and tested in that release):
#114564: Fix JS_Enumerate to return an empty id array instead of null
#115395: Fix JS garbage collection
#115200: Security dialog no longer blows assertion
#123211: Make sure output of sort array function is -1, 0, or 1.
#116195: Fix ImportProperty(), cope with an existing local variable
of the same name as the imported property
Unbusticate JS_invoke() so that closures work again
#115384,#115395: Handle bugs in toSource that strike when
getProperty is non-idempotent. Fix crash during JavaScript
garbage collection after enumerating object properties.
#??????: mjudge - Win16 files to make ptrdiff_t be 32 bits on Win16
gerv%gerv.net
scc%mozilla.org
brendan%mozilla.org
sspitzer%netscape.com
shaver%mozilla.org
dmose%mozilla.org
fur%netscape.com
mccabe%netscape.com
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