Implement support for optional fuel metering

[Robbepop]

Closes #643.

[paritytech-cicd-pr]

BENCHMARKS

	NATIVE			WASMTIME
BENCHMARK	MASTER	PR	DIFF	MASTER	PR	DIFF	WASMTIME OVERHEAD
execute/ bare_call_0	1.45ms	1.47ms	🟢 0.47%	1.18ms	1.25ms	🔴 5.97%	🟢 -15%
execute/ bare_call_0/typed	1.12ms	1.06ms	🟢 -5.81%	774.84µs	788.74µs	⚪ 1.63%	🟢 -25%
execute/ bare_call_1	1.50ms	1.51ms	🟢 0.86%	1.40ms	1.48ms	🔴 5.28%	🟢 -2%
execute/ bare_call_16	2.38ms	2.34ms	🟢 -1.39%	4.28ms	4.21ms	🟢 -1.66%	🟡 80%
execute/ bare_call_16/typed	1.74ms	1.63ms	🟢 -6.55%	2.25ms	2.25ms	⚪ 0.36%	🟢 38%
execute/ bare_call_1/typed	1.24ms	1.17ms	🟢 -5.92%	1.22ms	1.26ms	🔴 2.79%	🟢 8%
execute/ bare_call_4	1.69ms	1.66ms	🟢 -2.38%	1.85ms	2.00ms	🔴 7.95%	🟢 21%
execute/ bare_call_4/typed	1.23ms	1.16ms	🟢 -5.76%	1.25ms	1.23ms	⚪ -1.23%	🟢 6%
execute/ br_table	1.25ms	1.18ms	🟢 -5.72%	1.43ms	1.45ms	🔴 1.87%	🟢 23%
execute/ count_until	651.24µs	646.61µs	⚪ -0.79%	2.14ms	1.99ms	🟢 -7.05%	🔴 208%
execute/ factorial_iterative	329.36µs	325.35µs	🟢 -1.20%	907.44µs	922.93µs	⚪ 1.28%	🔴 184%
execute/ factorial_recursive	641.67µs	646.75µs	⚪ 0.85%	1.34ms	1.36ms	🔴 1.23%	🔴 110%
execute/ fib_iterative	1.51ms	1.35ms	🟢 -10.40%	5.01ms	5.06ms	⚪ 0.89%	🔴 274%
execute/ fib_recursive	5.94ms	5.84ms	🟢 -1.66%	12.28ms	12.54ms	🔴 2.05%	🔴 115%
execute/ global_bump	963.70µs	987.10µs	🔴 2.05%	2.56ms	2.64ms	🔴 3.06%	🔴 168%
execute/ global_const	742.97µs	770.69µs	⚪ 3.30%	2.40ms	2.37ms	⚪ -1.06%	🔴 208%
execute/ host_calls	29.57µs	27.14µs	🟢 -11.12%	40.23µs	39.94µs	⚪ -0.68%	🟢 47%
execute/ memory_fill	1.31ms	1.23ms	🟢 -5.86%	4.05ms	4.24ms	🔴 4.71%	🔴 244%
execute/ memory_sum	1.30ms	1.19ms	🟢 -8.62%	4.06ms	4.13ms	⚪ 1.51%	🔴 247%
execute/ memory_vec_add	2.51ms	2.42ms	🟢 -3.75%	7.63ms	7.96ms	🔴 4.32%	🔴 230%
execute/ recursive_is_even	1.14ms	1.14ms	⚪ -0.22%	2.22ms	2.29ms	🔴 3.04%	🔴 101%
execute/ recursive_ok	152.37µs	159.98µs	🔴 4.87%	310.49µs	320.68µs	🔴 3.48%	🟡 100%
execute/ recursive_scan	181.87µs	189.14µs	🔴 4.22%	400.33µs	405.00µs	⚪ 1.68%	🔴 114%
execute/ recursive_trap	14.88µs	14.83µs	⚪ -0.40%	30.95µs	32.81µs	🔴 5.92%	🔴 121%
execute/ regex_redux	538.88µs	523.59µs	🟢 -2.84%	1.37ms	1.43ms	🔴 4.47%	🔴 173%
execute/ rev_complement	503.01µs	465.36µs	🟢 -7.53%	1.40ms	1.47ms	🔴 5.39%	🔴 217%
execute/ tiny_keccak	355.04µs	333.90µs	🟢 -6.07%	1.14ms	1.16ms	🔴 1.72%	🔴 249%
execute/ trunc_f2i	725.92µs	707.53µs	🟢 -2.54%	2.15ms	2.27ms	🔴 5.55%	🔴 221%
instantiate/ wasm_kernel	64.78µs	64.75µs	⚪ 0.57%	69.30µs	74.32µs	🔴 6.64%	🟢 15%
translate/ erc1155	209.52µs	238.63µs	🔴 13.36%	388.73µs	445.37µs	🔴 14.78%	🟡 87%
translate/ erc20	103.90µs	114.87µs	🔴 10.82%	191.65µs	216.35µs	🔴 12.82%	🟡 88%
translate/ erc721	146.20µs	162.67µs	🔴 11.27%	280.11µs	313.77µs	🔴 12.19%	🟡 93%
translate/ spidermonkey	72.44ms	0.00ns	🔴 10.70%	0.00ns	0.00ns	🔴 14.80%	🟢 0%
translate/ wasm_kernel	3.77ms	4.11ms	🔴 8.68%	7.16ms	8.09ms	🔴 12.72%	🟡 97%

Link to pipeline

[codecov-commenter]

Codecov Report

Merging #653 (53cd277) into master (852f14a) will increase coverage by 0.34%.
The diff coverage is 86.85%.

@@            Coverage Diff             @@
##           master     #653      +/-   ##
==========================================
+ Coverage   80.96%   81.31%   +0.34%     
==========================================
  Files          99      100       +1     
  Lines        7905     8358     +453     
==========================================
+ Hits         6400     6796     +396     
- Misses       1505     1562      +57     

Impacted Files	Coverage Δ
crates/core/src/trap.rs	53.73% <0.00%> (-0.82%)	⬇️
crates/wasmi/src/engine/cache.rs	81.81% <ø> (ø)
crates/wasmi/src/error.rs	58.62% <0.00%> (-6.77%)	⬇️
crates/wasmi/src/module/parser.rs	73.54% <ø> (+0.24%)	⬆️
crates/wasmi/src/func/caller.rs	41.66% <23.07%> (-13.89%)	⬇️
crates/wasmi/src/store.rs	76.89% <52.27%> (-5.59%)	⬇️
crates/wasmi/src/engine/executor.rs	94.89% <58.00%> (-1.93%)	⬇️
crates/wasmi/src/engine/bytecode/mod.rs	86.66% <71.42%> (-13.34%)	⬇️
crates/wasmi/src/memory/mod.rs	65.64% <80.00%> (+0.32%)	⬆️
crates/wasmi/src/engine/config.rs	68.00% <88.88%> (+4.58%)	⬆️
... and 15 more

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