| Issue |
165664
|
| Summary |
[BOLT][AArch64] Application crash with segment fault after bolt instrument sometimes
|
| Labels |
BOLT
|
| Assignees |
|
| Reporter |
mrzhouyh
|
My application crash with segment fault after BOLT instrument on arm64 ( Kunpeng 920 5250 acctually ), this issue happens somtimes, not always. And it never appear on x86.
the intrument command is :
` llvm-bolt $bin -o ${BOLTDIR}/${filename}.inst -instrument --instrumentation-file=${BOLTDIR}/${filename}.fdata`
After check the core file, it seems that segment fault raised when TLS accessed like:
`__thread int hg_trigger_success = 0;
void func() {
/** do something */
hg_trigger_success = 1; /** segment fault here*/
/** do something */
}
`
` 0x0000ffffbefa96f4 <+1396>: msr nzcv, x1
0x0000ffffbefa96f8 <+1400>: ldp x0, x1, [sp], #16
0x0000ffffbefa96fc <+1404>: b 0xffffbefa9778 <crt_hg_progress+1528>
0x0000ffffbefa9700 <+1408>: cbnz w27, 0xffffbefaa5a4 <crt_hg_progress+5156>
0x0000ffffbefa9704 <+1412>: mrs x16, **tpidr_el0**
0x0000ffffbefa9708 <+1416>: adrp x0, 0xffffbea90000 <[email protected]>
0x0000ffffbefa970c <+1420>: ldr x3, [x0, #3904]
0x0000ffffbefa9710 <+1424>: add x0, x0, #0xf40
0x0000ffffbefa9714 <+1428>: stp x0, x1, [sp, #-16]!
0x0000ffffbefa9718 <+1432>: mov x0, x3
0x0000ffffbefa971c <+1436>: movk x1, #0x0, lsl #48
0x0000ffffbefa9720 <+1440>: movk x1, #0x0, lsl #32
0x0000ffffbefa9724 <+1444>: movk x1, #0x0, lsl #16
0x0000ffffbefa9728 <+1448>: movk x1, #0x264
0x0000ffffbefa972c <+1452>: stp x0, x1, [sp, #-16]!
0x0000ffffbefa9730 <+1456>: adrp x0, 0xffffbf22c000 <swim_updates_parse+18100>
--Type <RET> for more, q to quit, c to continue without paging--
0x0000ffffbefa9734 <+1460>: add x0, x0, #0x594
0x0000ffffbefa9738 <+1464>: blr x0
0x0000ffffbefa973c <+1468>: mov w17, #0x1 // #1
0x0000ffffbefa9740 <+1472>: subs w26, w26, w7
=> 0x0000ffffbefa9744 <+1476>: str w17, [**x16**, x0]
0x0000ffffbefa9748 <+1480>: b.eq 0xffffbefa9778 <crt_hg_progress+1528> // b.none
0x0000ffffbefa974c <+1484>: stp x0, x1, [sp, #-16]!
0x0000ffffbefa9750 <+1488>: mrs x1, nzcv
`
Is here anybody know why this issus happen, and how to fix it?
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