experiment: panic on getpid

[mkroening]

rust-lang/rust#153130 makes getpid panic in Rust's std.

This PR makes getpid panic in the kernel to test whether this is used by any Rust apps that we test against.

[github-actions]

Benchmark Results

Details

Benchmark	Current: 19c09ec	Previous: 6f0bfbf	Performance Ratio
startup_benchmark Build Time	88.35 s	95.42 s	0.93 ❗
startup_benchmark File Size	0.86 MB	0.86 MB	1.00 ❗
Startup Time - 1 core	0.96 s (±0.03 s)	0.95 s (±0.03 s)	1.02
Startup Time - 2 cores	0.97 s (±0.03 s)	0.96 s (±0.04 s)	1.00
Startup Time - 4 cores	0.96 s (±0.03 s)	0.95 s (±0.03 s)	1.01
multithreaded_benchmark Build Time	86.59 s	92.30 s	0.94 ❗
multithreaded_benchmark File Size	0.96 MB	0.96 MB	1.00 ❗
Multithreaded Pi Efficiency - 2 Threads	88.91 % (±7.89 %)	90.21 % (±9.12 %)	0.99
Multithreaded Pi Efficiency - 4 Threads	43.61 % (±2.97 %)	44.54 % (±4.03 %)	0.98
Multithreaded Pi Efficiency - 8 Threads	25.38 % (±2.05 %)	26.13 % (±2.54 %)	0.97
alloc_benchmarks Build Time	99.29 s	98.66 s	1.01 ❗
alloc_benchmarks File Size	0.93 MB	0.93 MB	1.00 ❗
Allocations - Allocation success	100.00 %	100.00 %	1
Allocations - Deallocation success	100.00 %	100.00 %	1
Allocations - Pre-fail Allocations	100.00 %	100.00 %	1
Allocations - Average Allocation time	13461.75 Ticks (±223.92 Ticks)	10851.98 Ticks (±378.41 Ticks)	1.24 ❗
Allocations - Average Allocation time (no fail)	13461.75 Ticks (±223.92 Ticks)	10851.98 Ticks (±378.41 Ticks)	1.24 ❗
Allocations - Average Deallocation time	1300.91 Ticks (±1178.19 Ticks)	1473.25 Ticks (±1018.97 Ticks)	0.88
mutex_benchmark Build Time	92.42 s	93.32 s	0.99 ❗
mutex_benchmark File Size	0.96 MB	0.96 MB	1.00 ❗
Mutex Stress Test Average Time per Iteration - 1 Threads	13.24 ns (±0.81 ns)	13.08 ns (±0.66 ns)	1.01
Mutex Stress Test Average Time per Iteration - 2 Threads	15.74 ns (±0.87 ns)	16.16 ns (±0.76 ns)	0.97

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