Closed Bug 991408 Opened 11 years ago Closed 11 years ago

[tarako] b2g-info returns "Fatal error: B2G main process not found" on pvtbuilds

Categories

(Firefox OS Graveyard :: GonkIntegration, defect)

Product:
Firefox OS Graveyard
Component:
GonkIntegration
Platform:
ARM
Gonk (Firefox OS)
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

(blocking-b2g:-, b2g-v1.3 unaffected, b2g-v1.3T affected)

Status:
RESOLVED INVALID
Project Flags:
blocking-b2g -
Tracking Flags:
Tracking Status
b2g-v1.3 --- unaffected
b2g-v1.3T --- affected

People

(Reporter: nhirata, Unassigned)

Details

1. adb shell b2g-info Expected: some output Actual: Fatal error: B2G main process not found Note: 1. works with taipei builds. Gaia 578fdccea89a88b417d296f8cf20b39099d44be4 Gecko https://hg.mozilla.org/releases/mozilla-b2g28_v1_3t/rev/34ed4cbc5a59 BuildID 20140402094402 Version 28.1 ro.build.version.incremental=eng.cltbld.20140402.132109 ro.build.date=Wed Apr 2 13:21:16 EDT 2014 Buri
er. I meant Tarako not Buri. For 1.3 Buri: Gaia c5cd3a11e91339163b351d50769eaca0067da860 Gecko https://hg.mozilla.org/releases/mozilla-b2g28_v1_3/rev/5045a67b47ed BuildID 20140401164001 Version 28.0 ro.build.version.incremental=324 ro.build.date=Thu Dec 19 14:04:55 CST 2013 It's not affected.
status-b2g-v1.3: --- → unaffected
we need tooling that works in order to monitor the memory since most of the bugs are based on issues with memory.
blocking-b2g: --- → 1.3T?
I just checked this on the same build where you are seeing the issue and I did not see the error - I am seeing the information dump as expected. Are you still seeing the same problem after a reboot?
Are you using a Taipei build? Can you place your info please?
Flags: needinfo?(jhammink)
It was a PVT build from yesterday. Gaia 578fdccea89a88b417d296f8cf20b39099d44be4 Gecko https://hg.mozilla.org/releases/mozilla-b2g28_v1_3t/rev/34ed4cbc5a59 BuildID 20140402094402 Version 28.1 ro.build.version.incremental=76 ro.build.date=Tue Apr 1 06:43:27 CST 2014 Here's what I get: Johns-MacBook-Pro-3:B2G-flash-tool johnhammink$ adb shell b2g-info | megabytes | NAME PID PPID CPU(s) NICE USS PSS RSS VSIZE OOM_ADJ USER b2g 84 1 20.6 0 33.4 37.1 44.7 129.9 0 root (Nuwa) 339 84 0.8 0 2.9 5.4 11.6 50.5 0 root Homescreen 370 339 2.9 18 9.0 13.4 22.3 63.7 8 app_370 (Preallocated a 440 339 0.7 18 5.0 8.1 15.6 57.5 1 root System memory info: Total 98.1 MB Used - cache 63.7 MB B2G procs (PSS) 64.0 MB Non-B2G procs -0.3 MB Free + cache 34.5 MB Free 5.1 MB Cache 29.3 MB Low-memory killer parameters: notify_trigger 14336 KB oom_adj min_free 0 4096 KB 1 5120 KB 2 6144 KB 6 7168 KB 8 8192 KB 10 20480 KB That said let me flash up today's PVT build and come back on this bug.
Flags: needinfo?(jhammink)
Alas, it's working for me also after flashing today's build: Gaia 8d212f640014db62c622e8c939ddbf8595f00438 Gecko https://hg.mozilla.org/releases/mozilla-b2g28_v1_3t/rev/ddd7ba612cfe BuildID 20140403004001 Version 28.1 ro.build.version.incremental=76 ro.build.date=Tue Apr 1 06:43:27 CST 2014 Is it posssible after installing from PVT that somehow I am picking up bits from the original Taipei build? Of course, resetting the Tarako doesn't work. I am wondering what could be different about our setups.
How are you flashing the device? Are you using the tarako.zip file? Or are you just flashing gecko/gaia?
Actually nevermind I saw the bottom part of your information. You're using Taipei's gonk level and flashed gecko/gaia from the pvt builds on top. This makes a difference.
Sure. The device previously had a Taipei build on it. To be clear, I copied b2g-28.1.en-US.android-arm.tar.gz b2g-28.1.en-US.android-arm.crashreporter-symbols.zip gaia.zip and tarako.zip from PVT builds /latest folder. I extracted each folder, and ran ./flash_Gg.sh -n So probably, yes. May I ask how are you getting full pvt build on the device?
let's see if Thomas knows anything about this
Flags: needinfo?(ttsai)
Is PVT build "user" or "userdebug" build? If it's user build, b2g-info can't work. Taipei build has a hack to enable adb root in user build, so we can use more tools to debug.
Flags: needinfo?(ttsai)
Component: Gaia::System → GonkIntegration
Thomas, This is for both production and engineering builds: Gaia acd18bbd94ebfa534e252a24a75a0617e4b5d5ae Gecko https://hg.mozilla.org/releases/mozilla-b2g28_v1_3t/rev/91a1b54da4a6 BuildID 20140404004001 Version 28.1 ro.build.version.incremental=eng.cltbld.20140404.045138 ro.build.date=Fri Apr 4 04:51:46 EDT 2014 Tarako I think we would need the hack in the production builds to help us since there are different variables set for the production builds... John, since we are working with the vendor and the pulls are being built from their repo, we should be able to flash the gonk level as well. This means downloading the tarako.zip and flashing with that should be the better option for the device than just flashing gecko/gaia.
Ni? ttsai
Flags: needinfo?(ttsai)
how about "adb shell"'s prompt? Is it "#" ?
how about "su" in adb shell? A root permission is necessary to use b2g-info.
Flags: needinfo?(ttsai)
ni? Naoki for the last 2 comments
adb shell su will cause b2g-info to work.
Status: NEW → RESOLVED
blocking-b2g: 1.3T? → -
Closed: 11 years ago
Resolution: --- → INVALID

This caused by reading /proc/pid/exe, it is supposed to be link to /system/b2g/b2g, but it was updated (usually by adb remount and adb push), because the file changed, so that real file is deleted.

lrwxrwxrwx 1 root root 0 2025-01-21 09:11 exe -> /system/b2g/b2g (deleted)

Then b2g processes is not added into process list because b2g-info can't read /proc/[pid]/exe correctly.

adb reboot device should be able to recovered.

"Fatal error: B2G main process not found".

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