Files
dioxus/packages/cli/build.rs
T
Jonathan Kelley fb855b7088 fix: workspace hotpatch cache thrashing, feat: add compile profiling, cleanup + refactor + document cli request.rs file (#5479)
* it works!

* fix wasm hotpatch error

* bump wasmopt

* rename wasmopt flag

* rename ldd_keep_exports

* add build profiling

* undo bundle ignore

* some cleanups

* more cleanups

* wip: hoist up telemetry to builder

* fix compile

* wip: flamegraph rewrite

* clean up flamegraph impl

* cleanup profiling engine

* add comment on spans obj

* cleanup more phases

* more cleanup

* small cleanups

* bit more cleanups

* cleanup phases

* sign with tokio, not std proc

* split out the specific platform helpers

* cleanup a bit

* more cleanups

* more cleanups

* more cleanups

* more cleanups

* pull out fingerprint logic

* wip... I think I have a slightly better approach. saving checkpoint

* hm I think it's better now?

* fix: also seems to work not in workspace mode juuust yet

* okay yay almost there

* clooose but not there yet

* fix: manually export __wasm_apply_data_relocs since got relocations weren't firing

WASM workspace hotpatching: export __wasm_apply_global_relocs to fix call_indirect type mismatch

When workspace crates are recompiled with -Crelocation-model=pic for hotpatching, wasm-ld generates GOT.func.internal globals that hold element-segment-relative offsets (e.g., MetricCardProps::memoize = 31). These need __table_base added at runtime by __wasm_apply_global_relocs to become absolute table indices.

wasm-ld generates __wasm_apply_global_relocs but treats it as an internal synthetic function -- neither --export nor --export-if-defined will export it. Without the export, the runtime's call silently failed (the old code used unchecked_into on undefined), leaving the globals unrelocated. Function pointers then pointed to index 31 in the original module's table (some unrelated function) instead of table_base + 31 (the patched function), causing call_indirect to a signature that does not match.

Three changes:

patch.rs: After walrus processing, find __wasm_apply_global_relocs by name and add it as an export before emitting the patched wasm.
lib.rs: Replace unchecked_into with dyn_into for calling relocation functions, so missing exports are handled gracefully instead of silently swallowed.
link.rs: Remove the ineffective --export-if-defined flags that were added during debugging.

* cleanup

* fix scope dir

* change up naming a bit

* more tidying up

* more cleanups

* ignore early return

* clean er up

* more comprehensive cache bustign

* bust fingerprints of dag

* move bust_fingerprint back to request.rs

* add better rustdoc

* more idiomatic

* more cleanups

* fix panic, typos

* more lints

* only delete workspace prints in fat mod

* clippy
2026-04-14 12:09:49 -07:00

39 lines
1.1 KiB
Rust

use std::process::Command;
fn main() {
println!("cargo:rerun-if-env-changed=DIOXUS_CLI_GIT_SHA");
println!("cargo:rerun-if-env-changed=DIOXUS_CLI_GIT_SHA_SHORT");
println!("cargo:rerun-if-changed=.git/HEAD");
println!("cargo:rerun-if-changed=.git/refs");
let full_hash = std::env::var("DIOXUS_CLI_GIT_SHA").ok().or_else(|| {
let output = Command::new("git")
.args(["rev-parse", "HEAD"])
.output()
.ok()?;
if !output.status.success() {
return None;
}
let hash = String::from_utf8(output.stdout).ok()?;
let hash = hash.trim().to_string();
if hash.is_empty() {
None
} else {
Some(hash)
}
});
if let Some(full_hash) = full_hash {
println!("cargo:rustc-env=DIOXUS_CLI_GIT_SHA={full_hash}");
let short_hash = std::env::var("DIOXUS_CLI_GIT_SHA_SHORT")
.ok()
.unwrap_or_else(|| full_hash.chars().take(7).collect());
println!("cargo:rustc-env=DIOXUS_CLI_GIT_SHA_SHORT={short_hash}");
}
}