tmikov / jscomp Goto Github PK

Ahead of time JavaScript compiler

License: Apache License 2.0

Makefile 1.76% JavaScript 21.97% Shell 3.57% HTML 5.25% TypeScript 1.70% CMake 0.26% C++ 2.35% C 40.75% Perl 0.09% Batchfile 0.19% Groff 4.61% Python 16.74% Assembly 0.01% Objective-C 0.11% Objective-C++ 0.01% Swift 0.01% Emacs Lisp 0.11% NSIS 0.02% M4 0.49%

jscomp's People

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martindale lsm minadaky ericlu88 aylusltd 0x4e38 skyschulz lezsakdomi

jscomp's Issues

New primitive type for single-character strings

It seems like it would be beneficial to specialize 1-character strings so we don't need a heap allocation for simply extracting a character (e.g. x = "aaaaa"[2]).

Support "internal properties"

String.prototype.split() doesn't support regexes

Not implemented yet

add 'undefined'

It is a global read-only variable. We don't currently support those.

parseInt() doesn't follow the spec

parseInt() returns a results for huge integers that differ from Node and JS, and they all differ from my reading of the spec.

autoboxing of 'this' in non-strict mode

ECMAScript 5.1 says "The thisArg value is passed without modification as the this value. This is a change from Edition 3, where a undefined or null thisArg is replaced with the global object and ToObject is applied to all other values and that result is passed as the this value."

However both Mozilla and V8 seem to obey this only in strict mode. In non-strict mode they always perform autoboxing. Probably for compatibility reasons.

This issue is simply to note this. In the future we might decide to do something about it.

Add line numbers debugging support

Associate a source location (line and file name) with every IR instruction, just like we are currently doing with the call instructions.

allocate env indexes to "global vars" in non-strict mode

Awkward make issue

When running make runtime, I'm presented with this syntax error:

cd runtime/deps/libuv && ./gyp_uv.py
  File "./gyp_uv.py", line 39
    print 'Error running GYP'
                            ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print('Error running GYP')?
make: *** [Makefile:26: runtime/deps/libuv/out/Makefile] Error 1

Large integer constants

Code generation is invalid for large integer constants.

seal() and preventExtensions() have no effect on array elements

dirname and filename should change based on the directory of the executable

That behavior best matches the behavior of a Node.js app

finally (as well as rethrowing) loses the original stack trace

For obvious reasons. We might need to store the stack trace in the exception (duh!).

Better exception handling

Since we are using setjmp/longjmp, non-volatile variables are (practically speaking) undefined after the longjmp(). Currently we are handling this (as well the needed code duplication for 'finally') by generating a nested function for the handler and forcing all variables it uses to be flagged as escaping.

Ideally we should track which variables are used by the handler (and by "used" I mean live values before the handler runs) and force them to memory.

Improve Array.prototype.sort()

Array.prototype.sort() is an extremely slow implementation:

it is completely generic. For example it doesn't benefit if it is run on an actual Array or a TypedArray, where it could use much faster direct access to elements.
it uses exchange sort (yes, I know, but I wanted to get something going in a very short time)

Ability to wrap a native pointer

Either via a separate managed object, or directly a new tag type. If the former, possibly more data could be stored in the managed object.

toLower/UpperCase only converts ASCII characters

Doing it correctly in Unicode is not that easy and the current use cases didn't need it to work in Unicode. With that said, I hate leaving library functions half-implemented (String.prototype.split(), I am looking at you as well!)

Compilation fails again with gcc-4.9 (and probably Linux)

incorrect code generation with ?: and ||

function badfunc (a, b)
{
return (a ? '/' : 'a') || '.';
}

The identifier of a function expression is not visible in the function

See bugs/badfuncex.js

var f = function myfunc () { myfunc(); }

doesn't compile

Buffer.utf8Slice takes half of the running time of the compiler

It was always known that Browserify's "Buffer" implementation was a temporary fix - it was cool because it worked without modification, validating the compiler, but was probably slow.

Well, now it is known how slow it really is - it takes half the running time of the compiler when compiling anything. It appends every character to the string using two additions. This causes immense pressure on the garbage collector among other things.

js::toString() of objects fails with TypeError

See bugs/tostr1.js

Undefined reference to `pthread_sigmask`

I'm getting the following build log:

root@91b8df194dd4:/usr/local/lib/jscomp# ./jsc examples/factorial.js -o factorial
/usr/local/lib/jscomp/runtime/js/modules/buffer/index.js:117:7: warning: operator '==' is not recommended
/usr/local/lib/jscomp/runtime/js/modules/buffer/index.js:221:13: warning: operator '!=' is not recommended
/usr/local/lib/jscomp/runtime/js/modules/buffer/index.js:342:10: warning: condition is always true
/usr/local/lib/jscomp/runtime/js/modules/buffer/node_modules/is-array/index.js:32:20: warning: operator '==' is not recommended
runtime/release/libuv.a(signal.o): In function `uv__signal_block_and_lock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/signal.c:102: undefined reference to `pthread_sigmask'
runtime/release/libuv.a(signal.o): In function `uv__signal_unlock_and_unblock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/signal.c:114: undefined reference to `pthread_sigmask'
runtime/release/libuv.a(signal.o): In function `uv__signal_global_once_init':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/signal.c:67: undefined reference to `pthread_once'
runtime/release/libuv.a(signal.o): In function `uv__signal_block_and_lock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/signal.c:102: undefined reference to `pthread_sigmask'
runtime/release/libuv.a(signal.o): In function `uv__signal_unlock_and_unblock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/signal.c:114: undefined reference to `pthread_sigmask'
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/signal.c:114: undefined reference to `pthread_sigmask'
runtime/release/libuv.a(thread.o): In function `uv_thread_create':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:66: undefined reference to `pthread_create'
runtime/release/libuv.a(thread.o): In function `uv_thread_join':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:80: undefined reference to `pthread_join'
runtime/release/libuv.a(thread.o): In function `uv_mutex_trylock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:130: undefined reference to `pthread_mutex_trylock'
runtime/release/libuv.a(thread.o): In function `uv_rwlock_init':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:145: undefined reference to `pthread_rwlock_init'
runtime/release/libuv.a(thread.o): In function `uv_rwlock_destroy':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:150: undefined reference to `pthread_rwlock_destroy'
runtime/release/libuv.a(thread.o): In function `uv_rwlock_rdlock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:156: undefined reference to `pthread_rwlock_rdlock'
runtime/release/libuv.a(thread.o): In function `uv_rwlock_tryrdlock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:164: undefined reference to `pthread_rwlock_tryrdlock'
runtime/release/libuv.a(thread.o): In function `uv_rwlock_rdunlock':
thread.c:(.text.uv_rwlock_rdunlock+0x5): undefined reference to `pthread_rwlock_unlock'
runtime/release/libuv.a(thread.o): In function `uv_rwlock_wrlock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:179: undefined reference to `pthread_rwlock_wrlock'
runtime/release/libuv.a(thread.o): In function `uv_rwlock_trywrlock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:187: undefined reference to `pthread_rwlock_trywrlock'
runtime/release/libuv.a(thread.o): In function `uv_rwlock_wrunlock':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:196: undefined reference to `pthread_rwlock_unlock'
runtime/release/libuv.a(thread.o): In function `uv_once':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:202: undefined reference to `pthread_once'
runtime/release/libuv.a(thread.o): In function `uv_sem_init':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:268: undefined reference to `sem_init'
runtime/release/libuv.a(thread.o): In function `uv_sem_destroy':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:275: undefined reference to `sem_destroy'
runtime/release/libuv.a(thread.o): In function `uv_sem_post':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:281: undefined reference to `sem_post'
runtime/release/libuv.a(thread.o): In function `uv_sem_wait':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:290: undefined reference to `sem_wait'
runtime/release/libuv.a(thread.o): In function `uv_sem_trywait':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:302: undefined reference to `sem_trywait'
runtime/release/libuv.a(thread.o): In function `uv_cond_init':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:334: undefined reference to `pthread_condattr_setclock'
runtime/release/libuv.a(thread.o): In function `uv_barrier_init':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:481: undefined reference to `pthread_barrier_init'
runtime/release/libuv.a(thread.o): In function `uv_barrier_destroy':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:486: undefined reference to `pthread_barrier_destroy'
runtime/release/libuv.a(thread.o): In function `uv_barrier_wait':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:492: undefined reference to `pthread_barrier_wait'
runtime/release/libuv.a(thread.o): In function `uv_key_create':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:501: undefined reference to `pthread_key_create'
runtime/release/libuv.a(thread.o): In function `uv_key_delete':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:506: undefined reference to `pthread_key_delete'
runtime/release/libuv.a(thread.o): In function `uv_key_get':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:512: undefined reference to `pthread_getspecific'
runtime/release/libuv.a(thread.o): In function `uv_key_set':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/thread.c:517: undefined reference to `pthread_setspecific'
runtime/release/libuv.a(linux-core.o): In function `uv__io_poll':
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/linux-core.c:252: undefined reference to `pthread_sigmask'
/usr/local/lib/jscomp/runtime/deps/libuv/out/../src/unix/linux-core.c:231: undefined reference to `pthread_sigmask'
collect2: error: ld returned 1 exit status
error: child process terminated with code 1

Dockerfile here

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