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Issue 661179 link

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Issue metadata

Status: Untriaged
Owner: ----
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 2
Type: Bug



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Magic signature on set_wifi_transmit_power crashes is useless

Project Member Reported by diand...@chromium.org, Nov 1 2016

Issue description

Looking at crash: 89fc8e1b00000000

I see:

Magic Signature: __libc_do_syscall
Stable Signature: raise-9365b514

The actual stack crawl was:

0xf6d6f636	(libc-2.19.so + 0x00016636 )	__libc_do_syscall
0xf6d7f313	(libc-2.19.so -raise.c:56 )	raise
0xf6d802ff	(libc-2.19.so -abort.c:89 )	abort
0xf6f78ef9	(libbase-core-395517.so -debugger_posix.cc:249 )	base::debug::BreakDebugger
0xf6f8ca8d	(libbase-core-395517.so -logging.cc:755 )	logging::LogMessage::~LogMessage
0xab27c12d	(set_wifi_transmit_power -set_wifi_transmit_power.cc:156 )	SetWiFiTransmitPower::SetPowerMode
0xab27b759	(set_wifi_transmit_power -set_wifi_transmit_power.cc:289 )	main
0xf6d6f307	(libc-2.19.so -libc-start.c:285 )	__libc_start_main
0xab27b80f	(set_wifi_transmit_power + 0x0000180f )	_start
0xab27c6ff	(set_wifi_transmit_power -elf-init.c:87 )	__libc_csu_init
0xf706e9df	(ld-2.19.so + 0x0000b9df )	_dl_sort_fini
0xab27b7db	(set_wifi_transmit_power -set_wifi_transmit_power.cc:291 )	main

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The fact that "SetWiFiTransmitPower::SetPowerMode" wasn't in the signature seems a failure of the signature generation.

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I'm not 100% sure who is in charge of this these days, so adding a smattering of folks.
 

Comment 1 by derat@chromium.org, Nov 1 2016

Summary: Magic signature on set_wifi_transmit_power crashes is useless (was: powerd errors give a useless signature)
"Stable signature" signature seems to work here, it's just "magic signature" that is useless.
@1: Ah, got it.  I was confused by the fact that it just had "raise" in it, but I guess the extra hex after it (9365b514) encodes the rest of the crawl...  :)

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