- Build a static table of octal strings and use it instead of
building octal strings repeatedly during printing.
- Print a newline and an offset for every 64 bytes in the case
of printing array literals so it's easier to locate
variation in snapshot blobs.
- Rework the printing routines so that the differences are only
made in a WriteByteVectorLiteral routine. We can update this
for compression support in the future.
- Rename Snapshot::Generate() that write the data as C++ source
instead of a blob as Snaphost::GenerateAsSource() for clarity,
and move the file stream operations into it to streamline
error handling.
PR-URL: https://github.com/nodejs/node/pull/48851
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Incremental compilation of Node.js is slow. Currently on a powerful
Linux machine, it takes about 9 seconds and 830 MB of memory to compile
`gen/node_javascript.cc` with g++. This is the longest step when
recompiling a small change to a Javascript file.
`gen/node_javascript.cc` contains a lot of large binary literals of our
Javascript source code. It is well-known that embedding large binary
literals as C/C++ arrays is slow. One workaround is to include the data
as string literals instead. This is particularly nice for the Javascript
included via js2c, which look better as string literals anyway.
Add a build flag `NODE_JS2C_USE_STRING_LITERALS` to js2c. When this flag
is set, we emit string literals instead of array literals, i.e.:
```c++
// old: static const uint8_t X[] = { ... };
static const uint8_t *X = R"JS2C1b732aee(...)JS2C1b732aee";
// old: static const uint16_t Y[] = { ... };
static const uint16_t *Y = uR"JS2C1b732aee(...)JS2C1b732aee";
```
This requires some modest refactoring in order to deal with the flag
being on or off, but the new code itself is actually shorter.
I only enabled the new flag on Linux/macOS, since those are systems that
I have available for testing. On my Linux system with gcc, it speeds up
compilation by 5.5s (9.0s -> 3.5s). On my Mac system with clang, it
speeds up compilation by 2.2s (3.7s -> 1.5s). (I don't think this flag
will work with MSVC, but it'd probably speed up clang on windows.)
The long-term goal here is probably to allow this to occur incrementally
per Javascript file & in parallel, to avoid recompiling all of
`gen/node_javascript.cc`. Unfortunately the necessary gyp incantations
seem impossible (or at least, far beyond me). Anyway, a 60% speedup is a
nice enough win.
Refs: https://github.com/nodejs/node/issues/47984
PR-URL: https://github.com/nodejs/node/pull/48160
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Incremental compilation of Node.js is slow. Currently on a powerful
Linux machine, it takes about 5.8 seconds to compile
`gen/node_snapshot.cc` with g++.
As in the previous PR which dealt with `node_js2c`, we add a new build
define `NODE_MKSNAPSHOT_USE_STRING_LITERALS` which is used by
`node_mksnapshot`. When this flag is set, we emit string literals
instead of array literals for the snapshot blob and for the code cache,
i.e.:
```c++
// old: static const uint8_t X[] = { ... };
static const uint8_t *X = "...";
```
I only enabled the new flag on Linux/macOS, since those are systems that
I have available for testing. On my Linux system with gcc, it speeds up
compilation of this file by 3.7s (5.8s -> 2.1s). On my Mac system with
clang, it speeds up compilation by 1.7s (3.4s -> 1.7s).
Again, the right thing here is probably to generate separate files for
the snapshot blob and for each code cache output, but this is a nice
intermediate speedup.
Refs: https://github.com/nodejs/node/issues/47984
Refs: https://github.com/nodejs/node/pull/48160
PR-URL: https://github.com/nodejs/node/pull/48162
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
This makes it easier to use third-party dependencies in this tool
(e.g. adding compression using algorithms not available in Python).
It is also much faster - locally js2c.py takes ~1.5s to generate the
output whereas this version takes ~0.1s - and consumes less memory
(~110MB v.s. 66MB).
This also modifies the js2c.py a bit to simplify the output, making
it easier to compare with one generated by the C++ version. Locally
the output from the two are identical. We'll remove js2c.py in a
subsequent commit when the C++ version is used by default.
PR-URL: https://github.com/nodejs/node/pull/46997
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Drive-by: Replace the SFINAE with a static_assert because we don't
have (or need) an implementation for non-scalar AliasedBufferBase
otherwise. Add forward declarations to memory_tracker.h now that
aliased-buffer.h no longer includes util-inl.h.
PR-URL: https://github.com/nodejs/node/pull/46817
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Locally the hashing of the binding names sometimes has significant
presence in the profile of bindings, because there can be collisions,
which makes the cost of adding a new binding data non-trivial,
but it's wasteful to spend time on hashing them or dealing with
collisions at all, since we can just use the EmbedderObjectType
enum as the key, as the string names are not actually used beyond
debugging purposes and can be easily matched with a macro.
And since we can just use the enum as the key, we do not even
need the map and can just use an array with the enum as indices
for the lookup.
PR-URL: https://github.com/nodejs/node/pull/46620
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Python 3.9 on IBM i now properly returns "os400" for sys.platform
instead of claiming to be AIX as it did previously. While the IBM i PASE
environment is compatible with AIX, it is a subset and has numerous
differences which makes it beneficial to distinguish, however this means
that it now needs explicit support here.
PR-URL: https://github.com/nodejs/node/pull/46739
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Remove the dependency on ICU for this part, as well as the
hacky way of converting embedder main sources to UTF-8 via
V8 APIs. Allow `UnionBytes` to own the memory its pointing
to in order to simplify the code on the `BuiltinLoader` side.
PR-URL: https://github.com/nodejs/node/pull/46119
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Generalize the finalizer's second pass callback to make it
cancellable and simplify the code around the second pass callback.
With this change, it is determined that Reference::Finalize or
RefBase::Finalize are called once, either from the env's shutdown,
or from the env's second pass callback.
All existing node-api js tests should pass without a touch. The
js_native_api cctest is no longer applicable with this change,
just removing it.
PR-URL: https://github.com/nodejs/node/pull/44141
Refs: https://github.com/nodejs/node/issues/44071
Reviewed-By: Michael Dawson <midawson@redhat.com>
Add an ExitCode enum class and use it throughout the code base
instead of hard-coding the exit codes everywhere. At the moment,
the exit codes used in many places do not actually conform to
what the documentation describes. With the new enums (which
are also available to the JS land as constants in an internal
binding) we could migrate to a more consistent usage of the
codes, and eventually expose the constants to the user land
when they are stable enough.
PR-URL: https://github.com/nodejs/node/pull/44746
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Jacob Smith <jacob@frende.me>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Commit dae283d96f from August 2020 introduced a call to EntropySource()
in SecretKeyGenTraits::DoKeyGen() in src/crypto/crypto_keygen.cc. There
are two problems with that:
1. It does not check the return value, it assumes EntropySource() always
succeeds, but it can (and sometimes will) fail.
2. The random data returned byEntropySource() may not be
cryptographically strong and therefore not suitable as keying
material.
An example is a freshly booted system or a system without /dev/random or
getrandom(2).
EntropySource() calls out to openssl's RAND_poll() and RAND_bytes() in a
best-effort attempt to obtain random data. OpenSSL has a built-in CSPRNG
but that can fail to initialize, in which case it's possible either:
1. No random data gets written to the output buffer, i.e., the output is
unmodified, or
2. Weak random data is written. It's theoretically possible for the
output to be fully predictable because the CSPRNG starts from a
predictable state.
Replace EntropySource() and CheckEntropy() with new function CSPRNG()
that enforces checking of the return value. Abort on startup when the
entropy pool fails to initialize because that makes it too easy to
compromise the security of the process.
Refs: https://hackerone.com/bugs?report_id=1690000
Refs: https://github.com/nodejs/node/pull/35093
ClientHelloParser::ParseHeader(data, avail) potentially accesses data
beyond avail bytes because it trusts the client to transmit a valid
frame length. Sending an impossibly small frame length causes the TLS
server to read beyond the buffer provided by the caller.
Guard against this by calling End() on the ClientHelloParser when the
client transmits an impossibly small frame length.
The test is designed to reliable cause a segmentation fault on Linux and
Windows when the buffer overrun occurs, and to trigger a spatial safety
violation when compiled with an address sanitizer enabled or when
running under valgrind.
PR-URL: https://github.com/nodejs/node/pull/44580
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Minwoo Jung <nodecorelab@gmail.com>
Yagiz Nizipli