fd5ba6a5e3
Remove the syn dependency from gkrust-shared, which was added in bug 1373878 as a workaround for this Cargo bug: https://github.com/rust-lang/cargo/issues/3923 MozReview-Commit-ID: L34J0davEYd
90 lines
2.9 KiB
Rust
90 lines
2.9 KiB
Rust
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#[cfg(feature="servo")]
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extern crate geckoservo;
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extern crate mp4parse_capi;
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extern crate nsstring;
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extern crate nserror;
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extern crate xpcom;
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extern crate netwerk_helper;
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extern crate prefs_parser;
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extern crate rust_url_capi;
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#[cfg(feature = "quantum_render")]
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extern crate webrender_bindings;
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#[cfg(feature = "cubeb_pulse_rust")]
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extern crate cubeb_pulse;
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extern crate encoding_c;
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extern crate encoding_glue;
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#[cfg(feature = "cubeb-remoting")]
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extern crate audioipc_client;
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#[cfg(feature = "cubeb-remoting")]
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extern crate audioipc_server;
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extern crate u2fhid;
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extern crate log;
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extern crate cosec;
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extern crate rsdparsa_capi;
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use std::boxed::Box;
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use std::ffi::CStr;
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use std::os::raw::c_char;
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use std::panic;
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/// Used to implement `nsIDebug2::RustPanic` for testing purposes.
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#[no_mangle]
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pub extern "C" fn intentional_panic(message: *const c_char) {
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panic!("{}", unsafe { CStr::from_ptr(message) }.to_string_lossy());
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}
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/// Contains the panic message, if set.
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static mut PANIC_REASON: Option<*const str> = None;
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/// Configure a panic hook to capture panic messages for crash reports.
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///
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/// We don't store this in `gMozCrashReason` because:
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/// a) Rust strings aren't null-terminated, so we'd have to allocate
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/// memory to get a null-terminated string
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/// b) The panic=abort handler is going to call `abort()` on non-Windows,
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/// which is `mozalloc_abort` for us, which will use `MOZ_CRASH` and
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/// overwrite `gMozCrashReason` with an unhelpful string.
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#[no_mangle]
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pub extern "C" fn install_rust_panic_hook() {
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let default_hook = panic::take_hook();
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panic::set_hook(Box::new(move |info| {
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// Try to handle &str/String payloads, which should handle 99% of cases.
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let payload = info.payload();
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// We'll hold a raw *const str here, but it will be OK because
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// Rust is going to abort the process before the payload could be
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// deallocated.
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if let Some(s) = payload.downcast_ref::<&str>() {
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unsafe { PANIC_REASON = Some(*s as *const str); }
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} else if let Some(s) = payload.downcast_ref::<String>() {
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unsafe { PANIC_REASON = Some(s.as_str() as *const str); }
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} else {
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// Not the most helpful thing, but seems unlikely to happen
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// in practice.
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println!("Unhandled panic payload!");
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}
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// Fall through to the default hook so we still print the reason and
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// backtrace to the console.
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default_hook(info);
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}));
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}
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#[no_mangle]
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pub extern "C" fn get_rust_panic_reason(reason: *mut *const c_char, length: *mut usize) -> bool {
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unsafe {
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if let Some(s) = PANIC_REASON {
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*reason = s as *const c_char;
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*length = (*s).len();
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true
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} else {
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false
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}
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}
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}
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