Difference between revisions of "Porting/Tor Browser"
JeremyRand (talk | contribs) (One of the libssp.so bugs is fixed) |
JeremyRand (talk | contribs) (Add ESR 60 info) |
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Early efforts to port Tor Browser to POWER are underway. The primary challenge is that Tor Browser uses an unusual build system (rbm) in order to ensure reproducible builds. While Tor's configuration of rbm can cross-compile for Windows and macOS targets, it is not configured out of the box to cross-compile for GNU/Linux targets. As a result, our early efforts are focused on modifying Tor's rbm configuration to support cross-compiling for non-x86 GNU/Linux targets; it is expected that this will be useful not only for POWER but also for targets like ARM. | Early efforts to port Tor Browser to POWER are underway. The primary challenge is that Tor Browser uses an unusual build system (rbm) in order to ensure reproducible builds. While Tor's configuration of rbm can cross-compile for Windows and macOS targets, it is not configured out of the box to cross-compile for GNU/Linux targets. As a result, our early efforts are focused on modifying Tor's rbm configuration to support cross-compiling for non-x86 GNU/Linux targets; it is expected that this will be useful not only for POWER but also for targets like ARM. | ||
− | Current source code is at https://notabug.org/JeremyRand/tor-browser-build/src/armhf (<code>armhf</code> branch). | + | Current source code is at: |
+ | |||
+ | * ESR 52 version (more stuff works; outdated; only useful for reference purposes): https://notabug.org/JeremyRand/tor-browser-build/src/armhf (<code>armhf</code> branch). | ||
+ | * ESR 60 version (less stuff works; more up to date; development effort should be targeted here): https://notabug.org/JeremyRand/tor-browser-build/src/armhf-esr60 (<code>armhf-esr60</code> branch) | ||
+ | |||
+ | If you're interested in joining the effort, talk to Jeremy_Rand or Jeremy_Rand_Talos in #talos-workstation. | ||
== Build instructions == | == Build instructions == | ||
+ | |||
+ | === ESR 52 === | ||
<code>./rbm/rbm build firefox --target release --target torbrowser-linux-arm</code> | <code>./rbm/rbm build firefox --target release --target torbrowser-linux-arm</code> | ||
+ | |||
+ | === ESR 60 === | ||
+ | |||
+ | <code>./rbm/rbm build firefox --target nightly --target torbrowser-linux-arm</code> | ||
== Errors / Troubleshooting == | == Errors / Troubleshooting == | ||
Line 11: | Line 22: | ||
=== Unfixed === | === Unfixed === | ||
− | + | ==== Missing libssp.so.0 (affects both ESR 52 and ESR 60) ==== | |
− | + | ||
− | + | <code>./firefox: error while loading shared libraries: libssp.so.0: cannot open shared object file: No such file or directory</code> | |
+ | |||
+ | * Workaround: add the <code>Browser</code> directory to your <code>LD_LIBRARY_PATH</code> in order for Tor Browser to find the library. | ||
+ | * This should be fixable by porting the non-Firefox projects (one of which is responsible for setting the <code>LD_LIBRARY_PATH</code>). | ||
+ | |||
+ | ==== Segfault immediately on startup (only affects ESR 60) ==== | ||
+ | |||
+ | gdb output: | ||
+ | |||
+ | <nowiki>Starting program: /home/user/Downloads/tor-browser-arm/2018-10-21/Browser/firefox.real | ||
+ | [Thread debugging using libthread_db enabled] | ||
+ | Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1". | ||
+ | |||
+ | Program received signal SIGSEGV, Segmentation fault. | ||
+ | 0xb201eaaa in ?? () | ||
+ | from /home/user/Downloads/tor-browser-arm/2018-10-21/Browser/libxul.so | ||
+ | (gdb) bt | ||
+ | #0 0xb201eaaa in ?? () | ||
+ | from /home/user/Downloads/tor-browser-arm/2018-10-21/Browser/libxul.so | ||
+ | #1 0xb1f66000 in ?? () | ||
+ | Backtrace stopped: previous frame identical to this frame (corrupt stack?)</nowiki> | ||
+ | |||
+ | * Not clear what's causing this. | ||
+ | * A very similar bug occurs with Debian's official <code>firefox-esr</code> version <code>60.2.2esr-1~deb9u1</code> package (<code>SIGSEGV</code> on startup, backtrace shows 2 addresses in <code>libxul.so</code> followed by a corrupt stack). | ||
=== Fixed === | === Fixed === | ||
Line 27: | Line 61: | ||
== Task list == | == Task list == | ||
− | * | + | * Finish porting this to Firefox ESR 60. |
* Build the projects besides Firefox. | * Build the projects besides Firefox. | ||
* Generalize the GNU/Linux cross-compiling changes so that they work on target arches besides armhf. (ppc64be, ppc64le, and aarch64 are all likely to be useful.) | * Generalize the GNU/Linux cross-compiling changes so that they work on target arches besides armhf. (ppc64be, ppc64le, and aarch64 are all likely to be useful.) |
Revision as of 23:28, 20 October 2018
Early efforts to port Tor Browser to POWER are underway. The primary challenge is that Tor Browser uses an unusual build system (rbm) in order to ensure reproducible builds. While Tor's configuration of rbm can cross-compile for Windows and macOS targets, it is not configured out of the box to cross-compile for GNU/Linux targets. As a result, our early efforts are focused on modifying Tor's rbm configuration to support cross-compiling for non-x86 GNU/Linux targets; it is expected that this will be useful not only for POWER but also for targets like ARM.
Current source code is at:
- ESR 52 version (more stuff works; outdated; only useful for reference purposes): https://notabug.org/JeremyRand/tor-browser-build/src/armhf (
armhf
branch). - ESR 60 version (less stuff works; more up to date; development effort should be targeted here): https://notabug.org/JeremyRand/tor-browser-build/src/armhf-esr60 (
armhf-esr60
branch)
If you're interested in joining the effort, talk to Jeremy_Rand or Jeremy_Rand_Talos in #talos-workstation.
Contents
Build instructions
ESR 52
./rbm/rbm build firefox --target release --target torbrowser-linux-arm
ESR 60
./rbm/rbm build firefox --target nightly --target torbrowser-linux-arm
Errors / Troubleshooting
Unfixed
Missing libssp.so.0 (affects both ESR 52 and ESR 60)
./firefox: error while loading shared libraries: libssp.so.0: cannot open shared object file: No such file or directory
- Workaround: add the
Browser
directory to yourLD_LIBRARY_PATH
in order for Tor Browser to find the library. - This should be fixable by porting the non-Firefox projects (one of which is responsible for setting the
LD_LIBRARY_PATH
).
Segfault immediately on startup (only affects ESR 60)
gdb output:
Starting program: /home/user/Downloads/tor-browser-arm/2018-10-21/Browser/firefox.real [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1". Program received signal SIGSEGV, Segmentation fault. 0xb201eaaa in ?? () from /home/user/Downloads/tor-browser-arm/2018-10-21/Browser/libxul.so (gdb) bt #0 0xb201eaaa in ?? () from /home/user/Downloads/tor-browser-arm/2018-10-21/Browser/libxul.so #1 0xb1f66000 in ?? () Backtrace stopped: previous frame identical to this frame (corrupt stack?)
- Not clear what's causing this.
- A very similar bug occurs with Debian's official
firefox-esr
version60.2.2esr-1~deb9u1
package (SIGSEGV
on startup, backtrace shows 2 addresses inlibxul.so
followed by a corrupt stack).
Fixed
/var/tmp/build/firefox-f8f42fea2af3/js/src/jsnativestack.cpp:69:31: error: 'syscall' was not declared in this scope
- This is because
jsnativestack.cpp
forgot to#include <unistd.h>
. This is fixed in all releases of Tor Browser based on ESR 60. Since we're still using ESR 52 for now, I fixed it by applying a short patch to add the missing include.
- This is because
/var/tmp/build/firefox-f8f42fea2af3/js/src/jsnativestack.cpp:77:27: error: 'getpid' was not declared in this scope
- Also caused by missing
#include <unistd.h>
injsnativestack.cpp
; same fixes as above.
- Also caused by missing
./firefox: error while loading shared libraries: libssp.so.0: cannot open shared object file: No such file or directory
- Workaround: copy
libssp.so*
from thegcc-cross
output tar into theBrowser
directory of thefirefox
output. - Fixed in the Firefox rbm build script as of 2018 Oct 10.
- Workaround: copy
Task list
- Finish porting this to Firefox ESR 60.
- Build the projects besides Firefox.
- Generalize the GNU/Linux cross-compiling changes so that they work on target arches besides armhf. (ppc64be, ppc64le, and aarch64 are all likely to be useful.)