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39 commits

Author SHA1 Message Date
Sam Atkins
53ebe607f8 LibWasm: Implement data.drop instruction 2023-01-28 22:57:25 +03:30
Sam Atkins
a2f42512c2 LibWasm: Move memory.init code together with other memory.foo impls 
And add a spec link while I'm at it.
 2023-01-28 22:57:25 +03:30
Sam Atkins
330911a274 LibWasm: Implement memory.copy instruction 2023-01-28 22:57:25 +03:30
Sam Atkins
42adba5ad4 LibWasm: Implement memory.fill instruction 2023-01-28 22:57:25 +03:30
Tim Schumacher
2552399bcd LibWasm: Use Core::Stream to read values in the bytecode interpreter 2023-01-25 17:10:05 +03:30
Linus Groh
6e19ab2bbc AK+Everywhere: Rename String to DeprecatedString 
We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
 2022-12-06 08:54:33 +01:00
Ali Mohammad Pur
2c0716e314 LibWasm: Simplify the return instruction execution code a bit 2022-04-22 21:12:47 +04:30
Ali Mohammad Pur
846b2c8a99 LibWasm: Push call results back in reverse order to preserve stack order 2022-04-22 21:12:47 +04:30
mjz19910
3102d8e160 Everywhere: Fix many spelling errors 2022-01-07 10:56:59 +01:00
Ali Mohammad Pur
fecbf0e03a LibWasm: Make blocks that take arguments actually work 
Previously we were ignoring the actual parameters and setting the arity
to an incorrect value, which could cause crashes (or unexpected traps).
 2021-12-21 05:03:44 +03:30
Ali Mohammad Pur
b5ca290605 LibWasm: Implement memory.init and passive mode data 2021-12-21 05:03:44 +03:30
Ali Mohammad Pur
3680aa253d LibWasm: Remove traps caught by validation 2021-11-11 09:20:04 +01:00
Andreas Kling
6ad427993a Everywhere: Behaviour => Behavior 2021-09-07 13:53:14 +02:00
Ali Mohammad Pur
2c7e2e351a LibWasm: Implement fx.nearest using nearbyint() instead of round() 
This instruction wants RoundingMode::ToEven, so let's use the correct
function.
 2021-08-30 22:47:02 +02:00
Ali Mohammad Pur
04e3965b09 LibWasm: Use Operators::BitShiftRight for i64.shru 
Using a left-shift operator for a right shift operation is not exactly
the most correct action :P
 2021-08-26 00:51:30 +02:00
Ali Mohammad Pur
8b6397446e LibWasm: Move some Values and Vector<Value>s instead of copying them 2021-08-12 21:03:53 +02:00
Ali Mohammad Pur
fa2ae02564 LibWasm: Avoid calculating stack bounds on each wasm call 
We only need to know the initial bounds, which we calculate by default
when the interpreter is constructed.
This cuts down on syscalls and makes wasm calls a lot cheaper.
 2021-08-12 21:03:53 +02:00
Ali Mohammad Pur
4060f18d7e LibWasm: Replace memory write macros with templated functions 2021-08-12 21:03:53 +02:00
Ali Mohammad Pur
b6381f785d LibWasm: Make memory operation address calculation match the spec 
...or rather, match what the spec _means_ to say, not what it actually
says.
 2021-08-12 21:03:53 +02:00
Ali Mohammad Pur
ad3de4648a LibWasm: Replace memory read macros with templated functions 2021-08-12 21:03:53 +02:00
Ali Mohammad Pur
563b402f04 LibWasm: Replace the numeric operation macros with templated functions 
This should make debugging and profiling much better, at little to no
runtime cost.
Also moves off the operator definitions to a separate header, so it
should also improve the editing experience quite a bit.
 2021-08-12 21:03:53 +02:00
Ali Mohammad Pur
52a2518a69 LibWasm: Remove a useless use of ScopeGuard 
There are no multiple exit paths in that function, so we can just put
the ending logic right at the end of the function instead.
 2021-07-17 01:13:39 +04:30
Ali Mohammad Pur
65cd5526cb LibWasm+Everywhere: Make the instruction count limit configurable 
...and enable it for LibWeb and test-wasm.
Note that `wasm` will not be limited by this.
 2021-07-17 01:13:39 +04:30
Ali Mohammad Pur
23b48f8fe1 Revert "LibWasm: Some more performance stuff (#8812)" 
This reverts commit 35394dbfaa.
I pushed the wrong button again, hopefully this will be the last of
such incidents.
 2021-07-17 01:11:28 +04:30
Ali Mohammad Pur
35394dbfaa
LibWasm: Some more performance stuff (#8812) 
* wasm: Don't try to print the function results if it traps

* LibWasm: Inline some very hot functions

These are mostly pretty small functions too, and they were about ~10%
of runtime.

* LibWasm+Everywhere: Make the instruction count limit configurable

...and enable it for LibWeb and test-wasm.
Note that `wasm` will not be limited by this.

* LibWasm: Remove a useless use of ScopeGuard

There are no multiple exit paths in that function, so we can just put
the ending logic right at the end of the function instead.
 2021-07-17 01:04:37 +04:30
Andrew Kaster
2af591267c LibWasm: Adjust signed integer operations to avoid UB 
Perform signed integer shifts, addition, subtraction, and rotations
using their corresponding unsigned type. Additionally, mod the right
hand side of shifts and rotations by the bit width of the integer per
the spec. This seems strange, but the spec is clear on the desired
wrapping behavior of arithmetic operations.
 2021-07-12 18:42:45 +04:30
Ali Mohammad Pur
65355c388b LibWasm: Use AK::StackInfo to track stack size 
This way, we can make sure that it doesn't overflow when ASAN is
enabled.
 2021-07-12 18:42:45 +04:30
Ali Mohammad Pur
06ffc0c4db LibWasm: Don't create useless temporary strings for trap reasons 
These strings are only used when execution traps, so there's no reason
to create actual strings until that happens; instead switch to using
StringViews.
 2021-07-06 17:55:00 +04:30
Ali Mohammad Pur
5636f8143d LibWasm: Allow overflow in normal 64-bit arithmetic instructions 2021-07-06 17:55:00 +04:30
Ali Mohammad Pur
d2212a1f51 LibWasm: Jump to the default label in br_table with negative values 
Also adds a forgotten Wasm::Printer implementation for printing table
branch arguments.
 2021-07-06 17:55:00 +04:30
Ali Mohammad Pur
4bdb0ad132 LibWasm: Guard stack accesses with checks 
If the stack is empty, let's just trap.
 2021-07-06 17:55:00 +04:30
Idan Horowitz
301c1a3a58 Everywhere: Fix incorrect usages of AK::Checked 
Specifically, explicitly specify the checked type, use the resulting
value instead of doing the same calculation twice, and break down
calculations to discrete operations to ensure no intermediary overflows
are missed.
 2021-07-04 20:08:28 +01:00
Ali Mohammad Pur
b538e15548 LibWasm: Give traps a reason and display it when needed 
This makes debugging wasm code a bit easier, as we now know what fails
instead of just "too bad, something went wrong".
 2021-07-02 04:53:01 +04:30
Ali Mohammad Pur
c4b82ace74 LibWasm: Limit the call stack depth and the number of executed insts 
These limits are described in the spec, and we're supposed to stop
execution at some point.
The limits are arbitrarily chosen.
 2021-06-22 00:26:25 +04:30
Ali Mohammad Pur
9971d13844 LibWasm: Trap if a non-Value is used as a Value 
Otherwise we'd just crash, which is not a good thing
 2021-06-22 00:26:25 +04:30
Ali Mohammad Pur
45710d0724 LibWasm: Implement saturating float truncation instructions 
With these, the only remaining unimplemented instructions are the
following:
- memory.init
- data.drop
- memory.copy
- memory.fill
- table.init
- elem.drop
- table.copy
- table.grow
- table.size
- table.fill
 2021-06-09 23:05:32 +04:30
Ali Mohammad Pur
3a44011cd4 LibWasm: Implement sign extension instructions 2021-06-09 23:05:32 +04:30
Ali Mohammad Pur
a4c4dd928b LibWasm: Implement spec-compliant float min/max ops 2021-06-09 23:05:32 +04:30
Sahan Fernando
d02e7b3811 LibWasm: Move Wasm::BytecodeInterpreter into its own header 2021-06-05 14:31:54 +04:30