add rustc_abi debugging attribute

[RalfJung]

This is the call ABI equivalent of rustc_layout(debug).

Fixes #115168
r? @bjorn3

[compiler-errors]

r=me ideally changing that Instance::resolve call to a call to Instance::mono, unless you want a specific review from bjorn3

[RalfJung]

r? @compiler-errors
@bors r=compiler-errors

[bors]

📌 Commit 1c4a454b2ad1099cb49be4f5480ae796e69339bb has been approved by compiler-errors

It is now in the queue for this repository.

[bors]

⌛ Testing commit 1c4a454b2ad1099cb49be4f5480ae796e69339bb with merge aea5ceb8d460ecf6cf84521ad3a0fabb46ef46ef...

[bors]

💔 Test failed - checks-actions

[RalfJung]

@bors r=compiler-errors

[bors]

📌 Commit abe2148 has been approved by compiler-errors

It is now in the queue for this repository.

[bors]

⌛ Testing commit abe2148 with merge 0fe46ee...

[bors]

☀️ Test successful - checks-actions
Approved by: compiler-errors
Pushing 0fe46ee to master...

[rust-timer]

Finished benchmarking commit (0fe46ee): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.0%	[1.0%, 5.9%]	8
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.4%	[-3.8%, -0.9%]	2
All ❌✅ (primary)	-	-	0

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 631.43s -> 631.815s (0.06%)
Artifact size: 316.11 MiB -> 316.06 MiB (-0.01%)