Date: Wed, 27 Sep 2017 12:08:42 +0200 From: Jan Beich <jbeich@FreeBSD.org> To: freebsd-rust@freebsd.org Cc: freebsd-gecko@freebsd.org Subject: No Stylo on i386 Message-ID: <8th0-8ndh-wny@FreeBSD.org>
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Firefox 57 plans to enable by default Rust-based CSS system[1]. It uses
rust-bindgen during build which works fine on amd64 but seems to crash
Cargo on i386.
FF56 Stylo had issues[2] on Linux i386 but those appear unrelated to
FreeBSD i386. OpenBSD i386 seems[3] to hit 32bit memory limit instead.
Can someone help? I don't know how to debug Rust apps.
$ cd /usr/ports/www/firefox
$ rm files/patch-bug1401093
$ make
<build-script-build dies with SIGSEGV>
$ cd $(make -V MOZ_OBJDIR)/toolkit/library/rust/
$ gmake
[...]
(gdb) r
Starting program: /usr/local/bin/cargo build --jobs 1 --release --frozen --manifest-path /wrkdirs/usr/ports/www/firefox/work/firefox-56.0/toolkit/library/rust/Cargo.toml --lib --target=i686-unknown-freebsd --features servo\ bindgen\ cubeb_pulse_rust\ simd-accel\ no-static-ideograph-encoder-tables
Compiling style v0.0.1 (file:///wrkdirs/usr/ports/www/firefox/work/firefox-56.0/servo/components/style)
[New LWP 101736 of process 5718]
[New LWP 101733 of process 5718]
Thread 3 received signal SIGUSR1, User defined signal 1.
[Switching to LWP 101733 of process 5718]
_read () at _read.S:3
3 PSEUDO(read)
(gdb) info registers
eax 0x4 4
ecx 0xfbffcd97 -67121769
edx 0x1 1
ebx 0x2194e460 563405920
esp 0xfbffcd04 0xfbffcd04
ebp 0xfbffcd34 0xfbffcd34
esi 0x5 5
edi 0x1 1
eip 0x21c258a7 0x21c258a7 <_read+7>
eflags 0x287 [ CF PF SF IF ]
cs 0x33 51
ss 0x3b 59
ds 0x3b 59
es 0x3b 59
fs 0x13 19
gs 0x1b 27
(gdb) thread apply all backtrace
Thread 3 (LWP 101733 of process 5718):
#0 _read () at _read.S:3
#1 0x2193388d in __thr_read (fd=5, buf=0xfbffcd97, nbytes=1)
at /usr/src/lib/libthr/thread/thr_syscalls.c:400
#2 0x21a3ed15 in read (fd=5, buf=0xfbffcd97, nbytes=1) at /usr/src/lib/libc/sys/read.c:48
#3 0x0149e912 in <&'a std::fs::File as std::io::Read>::read ()
#4 0x0148fd56 in std::sys_common::backtrace::__rust_begin_short_backtrace ()
#5 0x0149051a in std::panicking::try::do_call ()
#6 0x014bf218 in __rust_maybe_catch_panic ()
#7 0x014932fc in <F as alloc::boxed::FnBox<A>>::call_box ()
#8 0x014b0789 in std::sys::imp::thread::Thread::new::thread_start ()
#9 0x2192e3ce in thread_start (curthread=0x232bb280) at /usr/src/lib/libthr/thread/thr_create.c:288
#10 0x00000000 in ?? ()
Thread 1 (LWP 101848 of process 5718):
#0 0x2193ae89 in __pthread_mutex_lock (mutex=0x2261d008)
at /usr/src/lib/libthr/thread/thr_mutex.c:444
#1 0x0149af59 in std::thread::park_timeout ()
#2 0x014a6b68 in std::sync::mpsc::blocking::WaitToken::wait_max_until ()
#3 0x014934e3 in <std::sync::mpsc::oneshot::Packet<T>>::recv ()
#4 0x01495225 in <jobserver::HelperThread as core::ops::Drop>::drop ()
#5 0x0110c167 in core::ptr::drop_in_place ()
#6 0x01241682 in cargo::ops::cargo_rustc::compile_targets ()
#7 0x011d18b6 in cargo::ops::cargo_compile::compile_ws ()
#8 0x011cf6ef in cargo::ops::cargo_compile::compile_with_exec ()
#9 0x011cf555 in cargo::ops::cargo_compile::compile ()
#10 0x0104f7e6 in cargo::try_execute_builtin_command ()
#11 0x01046eb0 in cargo::execute ()
#12 0x01039d10 in cargo::call_main_without_stdin ()
#13 0x01045c06 in cargo::main ()
#14 0x014a986f in std::sys_common::backtrace::__rust_begin_short_backtrace ()
#15 0x014bf218 in __rust_maybe_catch_panic ()
#16 0x014b1d8c in std::rt::lang_start ()
#17 0x010b6fd1 in main ()
or
$ pkg install python27
$ hash git 2>/dev/null || pkg install mercurial
$ hg clone https://hg.mozilla.org/mozilla-unified firefox ||
git clone https://github.com/mozilla/gecko-dev firefox
$ cd firefox
$ git checkout origin/master || hg up central
$ echo "ac_add_options --disable-debug-symbols" >>.mozconfig
$ echo "export CC=clang40 CXX=clang++40 CPP=clang-cpp40" >>.mozconfig
$ ./mach bootstrap # select Firefox for Desktop
$ ./mach build
<build-script-build dies with SIGSEGV>
$ cd obj*/toolkit/library/rust/
$ gmake
[...]
(gdb) r
Starting program: /usr/local/bin/cargo rustc --jobs 1 --release --frozen --manifest-path /tmp/mozilla-central/toolkit/library/rust/Cargo.toml --lib --target=i686-unknown-freebsd --features servo\ bindgen\ quantum_render\ cubeb_pulse_rust\ no-static-ideograph-encoder-tables --
Compiling style v0.0.1 (file:///tmp/mozilla-central/servo/components/style)
[New LWP 100896 of process 20895]
[New LWP 100815 of process 20895]
Thread 3 received signal SIGUSR1, User defined signal 1.
[Switching to LWP 100815 of process 20895]
_read () at _read.S:3
3 PSEUDO(read)
(gdb) info registers
eax 0x4 4
ecx 0xfbffcd97 -67121769
edx 0x1 1
ebx 0x2194e460 563405920
esp 0xfbffcd04 0xfbffcd04
ebp 0xfbffcd34 0xfbffcd34
esi 0x5 5
edi 0x1 1
eip 0x21c258a7 0x21c258a7 <_read+7>
eflags 0x287 [ CF PF SF IF ]
cs 0x33 51
ss 0x3b 59
ds 0x3b 59
es 0x3b 59
fs 0x13 19
gs 0x1b 27
(gdb) thread apply all backtrace
Thread 3 (LWP 100815 of process 20895):
#0 _read () at _read.S:3
#1 0x2193388d in __thr_read (fd=5, buf=0xfbffcd97, nbytes=1)
at /usr/src/lib/libthr/thread/thr_syscalls.c:400
#2 0x21a3ed15 in read (fd=5, buf=0xfbffcd97, nbytes=1) at /usr/src/lib/libc/sys/read.c:48
#3 0x0149e912 in <&'a std::fs::File as std::io::Read>::read ()
#4 0x0148fd56 in std::sys_common::backtrace::__rust_begin_short_backtrace ()
#5 0x0149051a in std::panicking::try::do_call ()
#6 0x014bf218 in __rust_maybe_catch_panic ()
#7 0x014932fc in <F as alloc::boxed::FnBox<A>>::call_box ()
#8 0x014b0789 in std::sys::imp::thread::Thread::new::thread_start ()
#9 0x2192e3ce in thread_start (curthread=0x22d93100) at /usr/src/lib/libthr/thread/thr_create.c:288
#10 0x00000000 in ?? ()
Thread 1 (LWP 102123 of process 20895):
#0 0x2165931f in symlook_init_from_req (dst=0xfffdf338, src=0xfffdf3a8)
at /usr/src/libexec/rtld-elf/rtld.c:4902
#1 0x21656161 in symlook_default (req=0xfffdf3a8, refobj=0x2167b000)
at /usr/src/libexec/rtld-elf/rtld.c:3720
#2 0x21655b6f in find_symdef (symnum=161, refobj=0x2167b000, defobj_out=0xfffdf478, flags=1,
cache=0x0, lockstate=0xfffdf438) at /usr/src/libexec/rtld-elf/rtld.c:1577
#3 0x21655902 in _rtld_bind (obj=0x2167b000, reloff=472) at /usr/src/libexec/rtld-elf/rtld.c:706
#4 0x21651059 in _rtld_bind_start () at /usr/src/libexec/rtld-elf/i386/rtld_start.S:81
#5 0x2167b000 in ?? ()
#6 0x0149afec in std::thread::park_timeout ()
#7 0x014a6b68 in std::sync::mpsc::blocking::WaitToken::wait_max_until ()
#8 0x014934e3 in <std::sync::mpsc::oneshot::Packet<T>>::recv ()
#9 0x01495225 in <jobserver::HelperThread as core::ops::Drop>::drop ()
#10 0x0110c167 in core::ptr::drop_in_place ()
#11 0x01241682 in cargo::ops::cargo_rustc::compile_targets ()
#12 0x011d18b6 in cargo::ops::cargo_compile::compile_ws ()
#13 0x011cf6ef in cargo::ops::cargo_compile::compile_with_exec ()
#14 0x011cf555 in cargo::ops::cargo_compile::compile ()
#15 0x0106d966 in cargo::try_execute_builtin_command ()
#16 0x01046eb0 in cargo::execute ()
#17 0x01039d10 in cargo::call_main_without_stdin ()
#18 0x01045c06 in cargo::main ()
#19 0x014a986f in std::sys_common::backtrace::__rust_begin_short_backtrace ()
#20 0x014bf218 in __rust_maybe_catch_panic ()
#21 0x014b1d8c in std::rt::lang_start ()
#22 0x010b6fd1 in main ()
--
[1] https://wiki.mozilla.org/Quantum#Quantum_CSS
Stylo in about:support, layout.css.servo.enabled in about:config
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=1366050 (see Depends On)
[3] https://bugzilla.mozilla.org/show_bug.cgi?id=1401093
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