Add rust.frame-pointers config option

[Noratrieb]

This is very helpful for profiling. I've hacked this in many times, so let's add it properly.

[rustbot]

r? @Mark-Simulacrum

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[rustbot]

This PR modifies config.example.toml.

If appropriate, please update CONFIG_CHANGE_HISTORY in src/bootstrap/src/utils/change_tracker.rs.

This PR modifies src/bootstrap/src/core/config.

If appropriate, please update CONFIG_CHANGE_HISTORY in src/bootstrap/src/utils/change_tracker.rs.

[saethlin]

Can you make this on by default in the compiler profile?

[Mark-Simulacrum]

r=me on this change with or without the compiler profile change

[rustbot]

This PR changes src/bootstrap/defaults/config.compiler.toml. If appropriate, please also update config.codegen.toml so the defaults are in sync.

This PR modifies src/bootstrap/defaults.

If appropriate, please update CONFIG_CHANGE_HISTORY in src/bootstrap/src/utils/change_tracker.rs.

This PR changes src/bootstrap/defaults/config.codegen.toml. If appropriate, please also update config.compiler.toml so the defaults are in sync.

[Noratrieb]

with :3
@bors r=Mark-Simulacrum

[bors]

📌 Commit 09e6043 has been approved by Mark-Simulacrum

It is now in the queue for this repository.

[bors]

⌛ Testing commit 09e6043 with merge eb1f279...

[bors]

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing eb1f279 to master...

[rust-timer]

Finished benchmarking commit (eb1f279): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.3%	[-0.3%, -0.3%]	3
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

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

Cycles

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)	3.5%	[3.5%, 3.6%]	2
Improvements ✅ (primary)	-3.2%	[-3.6%, -2.7%]	3
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-3.2%	[-3.6%, -2.7%]	3

Binary size

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

Bootstrap: 640.916s -> 641.205s (0.05%)
Artifact size: 308.79 MiB -> 308.81 MiB (0.01%)