Add differential fuzzing

[Robbepop]

Closes #419.

[paritytech-cicd-pr]

BENCHMARKS

	NATIVE			WASMTIME
BENCHMARK	MASTER	PR	DIFF	MASTER	PR	DIFF	WASMTIME OVERHEAD
execute/ br_table	1.48ms	1.48ms	⚪ 0.05%	1.30ms	1.30ms	⚪ 0.29%	🟢 -12%
execute/ call/host/1	47.41µs	47.25µs	⚪ -0.66%	63.73µs	68.94µs	🔴 8.30%	🟢 46%
execute/ call/rec	167.79µs	168.54µs	⚪ 1.27%	347.93µs	347.90µs	⚪ -0.05%	🔴 106%
execute/ count_until	6.67ms	6.64ms	⚪ -0.71%	7.51ms	7.51ms	⚪ -0.02%	🟢 13%
execute/ divrem	6.23ms	6.23ms	⚪ -0.05%	7.77ms	6.96ms	🟢 -10.51%	🟢 12%
execute/ factorial/iter	247.82µs	242.49µs	🟢 -2.12%	317.48µs	318.90µs	⚪ 0.38%	🟢 32%
execute/ factorial/rec	695.48µs	686.54µs	🟢 -1.33%	1.29ms	1.30ms	⚪ 0.80%	🟡 89%
execute/ fibonacci/iter	1.29ms	1.30ms	⚪ 0.60%	1.26ms	1.27ms	⚪ 0.72%	🟢 -2%
execute/ fibonacci/rec	6.22ms	6.20ms	⚪ -0.40%	13.29ms	13.36ms	⚪ 0.49%	🔴 116%
execute/ fibonacci/tail	1.39ms	1.51ms	🔴 8.83%	3.82ms	3.83ms	⚪ 0.31%	🔴 153%
execute/ fuse	7.34ms	7.33ms	⚪ 0.00%	11.42ms	11.41ms	⚪ 0.00%	🟡 56%
execute/ global/bump	1.32ms	1.33ms	⚪ 1.22%	1.54ms	1.54ms	⚪ -0.02%	🟢 16%
execute/ global/get_const	699.31µs	700.76µs	⚪ 0.24%	750.54µs	750.51µs	⚪ 0.00%	🟢 7%
execute/ is_even/rec	1.10ms	1.11ms	⚪ 0.66%	2.19ms	2.21ms	⚪ 1.08%	🟡 100%
execute/ memory/fill_bytes	1.08ms	1.08ms	⚪ 0.08%	1.32ms	1.34ms	🔴 1.33%	🟢 24%
execute/ memory/sum_bytes	1.09ms	1.09ms	⚪ 0.23%	1.25ms	1.26ms	⚪ 0.73%	🟢 15%
execute/ memory/vec_add	2.96ms	2.96ms	⚪ -0.05%	3.62ms	3.62ms	⚪ 0.02%	🟢 22%
execute/ recursive_scan	189.77µs	190.78µs	⚪ 0.07%	379.53µs	378.32µs	⚪ -0.13%	🟡 98%
execute/ recursive_trap	15.80µs	15.44µs	🟢 -2.28%	34.32µs	34.43µs	⚪ 0.45%	🔴 123%
execute/ regex_redux	590.97µs	601.79µs	⚪ 1.40%	1.09ms	1.10ms	⚪ 0.73%	🟡 82%
execute/ rev_complement	443.34µs	444.09µs	⚪ 0.08%	672.23µs	669.84µs	⚪ -0.53%	🟡 51%
execute/ tiny_keccak	355.39µs	350.24µs	⚪ -0.77%	381.44µs	380.90µs	⚪ -0.23%	🟢 9%
execute/ trunc_f2i	615.85µs	616.89µs	⚪ 0.13%	961.16µs	961.10µs	⚪ -0.03%	🟡 56%
instantiate/ wasm_kernel	54.75µs	56.81µs	⚪ 0.38%	56.71µs	56.64µs	⚪ -0.50%	🟢 -0%
overhead/ call/typed/0	1.23ms	1.22ms	⚪ -0.13%	776.93µs	774.72µs	⚪ -0.24%	🟢 -37%
overhead/ call/typed/16	1.61ms	1.60ms	⚪ -1.02%	1.84ms	1.83ms	⚪ -0.47%	🟢 15%
overhead/ call/untyped/0	1.62ms	1.61ms	⚪ 0.11%	1.22ms	1.21ms	⚪ -0.59%	🟢 -25%
overhead/ call/untyped/16	2.50ms	2.49ms	⚪ -0.41%	4.03ms	4.02ms	⚪ -0.16%	🟡 61%
translate/ bz2/checked/default	1.38ms	1.38ms	⚪ 0.16%	2.55ms	2.54ms	⚪ -0.71%	🟡 83%
translate/ bz2/checked/fuel	1.42ms	1.42ms	⚪ 0.10%	2.70ms	2.69ms	⚪ -0.03%	🟡 89%
translate/ bz2/unchecked/default	1.12ms	1.13ms	⚪ 0.50%	1.88ms	1.88ms	⚪ 0.49%	🟡 67%
translate/ bz2/unchecked/fuel	1.16ms	1.16ms	⚪ 0.24%	2.02ms	2.02ms	⚪ -0.04%	🟡 74%
translate/ erc1155/checked/default	281.86µs	283.00µs	⚪ 0.19%	488.70µs	488.03µs	⚪ 0.00%	🟡 72%
translate/ erc1155/checked/fuel	300.99µs	300.60µs	⚪ -0.16%	516.38µs	516.50µs	⚪ 0.03%	🟡 72%
translate/ erc1155/unchecked/default	233.91µs	232.10µs	⚪ -0.34%	372.66µs	375.38µs	⚪ 0.89%	🟡 62%
translate/ erc1155/unchecked/fuel	251.39µs	249.10µs	⚪ -0.87%	398.90µs	399.50µs	⚪ 0.21%	🟡 60%
translate/ erc20/checked/default	136.83µs	137.36µs	⚪ 0.34%	235.85µs	235.38µs	⚪ -0.22%	🟡 71%
translate/ erc20/checked/fuel	144.87µs	145.21µs	⚪ 0.27%	244.81µs	246.35µs	⚪ 0.55%	🟡 70%
translate/ erc20/unchecked/default	113.21µs	113.92µs	⚪ 0.69%	178.89µs	180.76µs	⚪ 1.26%	🟡 59%
translate/ erc20/unchecked/fuel	119.92µs	120.94µs	⚪ 1.00%	188.51µs	190.40µs	⚪ 0.66%	🟡 57%
translate/ erc721/checked/default	195.29µs	194.34µs	⚪ -0.50%	341.97µs	339.61µs	⚪ -0.74%	🟡 75%
translate/ erc721/checked/fuel	203.48µs	203.62µs	⚪ -0.20%	356.41µs	354.65µs	⚪ -0.41%	🟡 74%
translate/ erc721/unchecked/default	159.22µs	159.56µs	⚪ 0.36%	263.25µs	257.35µs	🟢 -2.16%	🟡 61%
translate/ erc721/unchecked/fuel	167.50µs	167.97µs	⚪ 0.20%	270.02µs	270.62µs	⚪ 0.00%	🟡 61%
translate/ pulldown_cmark/checked/default	3.76ms	3.83ms	🔴 1.84%	6.69ms	6.69ms	⚪ -0.02%	🟡 75%
translate/ pulldown_cmark/checked/fuel	3.87ms	3.92ms	🔴 1.48%	7.00ms	7.00ms	⚪ -0.10%	🟡 78%
translate/ pulldown_cmark/unchecked/default	3.14ms	3.19ms	🔴 1.59%	5.09ms	5.07ms	⚪ -0.30%	🟡 59%
translate/ pulldown_cmark/unchecked/fuel	3.21ms	3.26ms	🔴 1.49%	5.35ms	5.36ms	⚪ 0.44%	🟡 64%
translate/ spidermonkey/checked/default	0.00ns	0.00ns	⚪ 0.52%	0.00ns	0.00ns	⚪ -0.05%	🟢 0%
translate/ spidermonkey/checked/fuel	0.00ns	0.00ns	⚪ 0.90%	0.00ns	0.00ns	⚪ 0.11%	🟢 0%
translate/ spidermonkey/unchecked/default	72.08ms	72.52ms	⚪ 0.88%	0.00ns	0.00ns	⚪ 0.26%	🟢 -100%
translate/ spidermonkey/unchecked/fuel	0.00ns	0.00ns	⚪ 0.66%	0.00ns	0.00ns	⚪ 0.44%	🟢 0%
translate/ wasm_kernel/checked/default	5.05ms	5.04ms	⚪ -0.29%	8.95ms	8.96ms	⚪ 0.06%	🟡 78%
translate/ wasm_kernel/checked/fuel	5.18ms	5.17ms	⚪ -0.12%	9.34ms	9.36ms	⚪ 0.30%	🟡 81%
translate/ wasm_kernel/unchecked/default	4.11ms	4.12ms	⚪ 0.05%	6.72ms	6.78ms	⚪ 0.81%	🟡 65%
translate/ wasm_kernel/unchecked/fuel	4.24ms	4.24ms	⚪ -0.15%	7.08ms	7.13ms	⚪ 0.49%	🟡 68%

Link to pipeline

[codecov-commenter]

Codecov Report

Attention: 33 lines in your changes are missing coverage. Please review.

Comparison is base (41ca061) 80.93% compared to head (9709598) 80.94%.

Files	Patch %	Lines
fuzz/fuzz_targets/utils.rs	0.00%	33 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #833   +/-   ##
=======================================
  Coverage   80.93%   80.94%           
=======================================
  Files         257      257           
  Lines       22461    22461           
=======================================
+ Hits        18179    18180    +1     
+ Misses       4282     4281    -1     

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