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script: Tell SpiderMonkey whether scripts are inline (#38363)

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to use the [SpiderMonkey Debugger
API](https://firefox-source-docs.mozilla.org/js/Debugger/) as the single
source of truth about scripts and their sources for devtools purposes
(servo/servo#38334), the debugger script needs to be able to distinguish
inline scripts from other scripts, because inline scripts are a special
case where the source contents need to come from the Servo parser.

the mechanism for this is
[Debugger.Script.prototype.**introductionType**](https://firefox-source-docs.mozilla.org/js/Debugger/Debugger.Source.html#introductiontype),
which is `inlineScript` for inline scripts or a variety of other values
for other kinds of scripts, but only the embedder can provide this
information.

this patch bumps mozjs to servo/mozjs#603, which expands on
CompileOptionsWrapper, making it a safe wrapper around CompileOptions.
to construct one from safe code, use Runtime::new_compile_options().
then you can call `set_introduction_type(&'static CStr)` on the new
instance. we also make Runtime::evaluate_script() take a
CompileOptionsWrapper from the caller, instead of constructing one
internally.

in this patch, we set the introductionType to `c"inlineScript"` when
calling run_a_classic_script() and compile_module_script() for inline
scripts, and leave it unset all other cases.

Testing: will undergo automated tests in #38334
Fixes: part of #36027, part of servo/servo#38378

---------

Signed-off-by: Delan Azabani <dazabani@igalia.com>
Co-authored-by: atbrakhi <atbrakhi@igalia.com>
This commit is contained in:
shuppy 2025-08-05 20:41:14 +08:00 • committed by GitHub
parent 0bf8676345
commit 3eddfeaee2
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8 changed files with 52 additions and 13 deletions
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8
components/script/script_runtime.rs
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@ -9,7 +9,7 @@
use core::ffi::c_char;
use std::cell::Cell;
use std::ffi::CString;
use std::ffi::{CStr, CString};
use std::io::{Write, stdout};
use std::ops::Deref;
use std::os::raw::c_void;
@ -1194,3 +1194,9 @@ impl Runnable {
}
pub(crate) use script_bindings::script_runtime::CanGc;
/// `introductionType` values in SpiderMonkey TransitiveCompileOptions.
pub(crate) struct IntroductionType;
impl IntroductionType {
pub const INLINE_SCRIPT: &'static CStr = c"inlineScript";
}