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runtime/trace frame pointer unwinding crash
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| To reproduce this crash: | |
| ``` | |
| go1.21.3 test -trace=/dev/null | |
| ``` | |
| Example crash: | |
| ``` | |
| SIGSEGV: segmentation violation | |
| PC=0x694a4 m=0 sigcode=1 | |
| goroutine 0 [idle]: | |
| runtime.fpTracebackPCs(...) | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/trace.go:1018 | |
| runtime.traceStackID(0x167d80b0f5a7?, {0xffff6ff2c018, 0xfd62ea4?, 0x80}, 0xfffff8407848?) | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/trace.go:991 +0x224 fp=0xfffff84077f0 sp=0xfffff84077a0 pc=0x694a4 | |
| runtime.traceEventLocked(0xfffff8407898?, 0x502dc?, 0x23d500?, 0x400002b6d8, 0x12, 0x0, 0x1, {0x0, 0x0, 0xc9e3f?}) | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/trace.go:834 +0x240 fp=0xfffff8407870 sp=0xfffff84077f0 pc=0x68b10 | |
| runtime.traceEvent(0x0?, 0x1, {0x0, 0x0, 0x0}) | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/trace.go:770 +0x90 fp=0xfffff84078e0 sp=0xfffff8407870 pc=0x68870 | |
| runtime.traceGoPreempt(...) | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/trace.go:1609 | |
| runtime.gopreempt_m(0x105d292a?) | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/proc.go:3786 +0x50 fp=0xfffff8407920 sp=0xfffff84078e0 pc=0x505a0 | |
| traceback: unexpected SPWRITE function runtime.mcall | |
| runtime.mcall() | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/asm_arm64.s:192 +0x54 fp=0xfffff8407930 sp=0xfffff8407920 pc=0x773e4 | |
| goroutine 19 [running]: | |
| runtime.asyncPreempt2() | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/preempt.go:307 +0x3c fp=0x4000097d40 sp=0x4000097d20 pc=0x4763c | |
| runtime.asyncPreempt() | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/preempt_arm64.s:47 +0x9c fp=0x4000097f30 sp=0x4000097d40 pc=0x7a42c | |
| fpcrash.MakeBigStruct() | |
| /home/ec2-user/fpcrash/main_test.go:13 +0x2c fp=0x4000097f40 sp=0x4000097f40 pc=0x1009dc | |
| fpcrash.TestCrash(0x0?) | |
| /home/ec2-user/fpcrash/main_test.go:23 +0x20 fp=0x4000097f60 sp=0x4000097f40 pc=0x100a10 | |
| testing.tRunner(0x4000082b60, 0x14f600) | |
| /home/ec2-user/sdk/go1.21.3/src/testing/testing.go:1595 +0xe8 fp=0x4000097fb0 sp=0x4000097f60 pc=0xca098 | |
| testing.(*T).Run.func1() | |
| /home/ec2-user/sdk/go1.21.3/src/testing/testing.go:1648 +0x2c fp=0x4000097fd0 sp=0x4000097fb0 pc=0xcaeac | |
| runtime.goexit() | |
| /home/ec2-user/sdk/go1.21.3/src/runtime/asm_arm64.s:1197 +0x4 fp=0x4000097fd0 sp=0x4000097fd0 pc=0x79894 | |
| created by testing.(*T).Run in goroutine 1 | |
| /home/ec2-user/sdk/go1.21.3/src/testing/testing.go:1648 +0x33c | |
| [ ... other stacks omitted ... ] | |
| r0 0x3 | |
| r1 0xffff6ff2c018 | |
| r2 0x80 | |
| r3 0x80 | |
| r4 0xc090c80000000000 | |
| r5 0x4000082d00 | |
| r6 0xffff6ff2c028 | |
| r7 0x7e | |
| r8 0xc090c80000000000 | |
| r9 0x29a | |
| r10 0xfbe8 | |
| r11 0xffffffffffffffda | |
| r12 0x179dd5bd931e | |
| r13 0x7fffffff | |
| r14 0x14f600 | |
| r15 0xffffffffffffffff | |
| r16 0xfffff83f7d10 | |
| r17 0x4000097c10 | |
| r18 0x0 | |
| r19 0x0 | |
| r20 0xfffff84077c0 | |
| r21 0x23d500 | |
| r22 0x4000004000 | |
| r23 0x0 | |
| r24 0x0 | |
| r25 0x0 | |
| r26 0x14f868 | |
| r27 0x271000 | |
| r28 0x23ce60 | |
| r29 0xfffff8407798 | |
| lr 0x68b10 | |
| sp 0xfffff84077a0 | |
| pc 0x694a4 | |
| fault 0xc090c80000000008 | |
| exit status 2 | |
| FAIL fpcrash 1.467s | |
| ``` |
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| #define JUNK -1.0740e+03 | |
| TEXT ·fillregs(SB),$0-0 | |
| FMOVD $JUNK, F0 | |
| FMOVD $JUNK, F1 | |
| FMOVD $JUNK, F2 | |
| FMOVD $JUNK, F3 | |
| FMOVD $JUNK, F4 | |
| FMOVD $JUNK, F5 | |
| FMOVD $JUNK, F6 | |
| FMOVD $JUNK, F7 | |
| FMOVD $JUNK, F8 | |
| FMOVD $JUNK, F9 | |
| FMOVD $JUNK, F10 | |
| FMOVD $JUNK, F11 | |
| FMOVD $JUNK, F12 | |
| FMOVD $JUNK, F13 | |
| FMOVD $JUNK, F14 | |
| FMOVD $JUNK, F15 | |
| FMOVD $JUNK, F16 | |
| FMOVD $JUNK, F17 | |
| FMOVD $JUNK, F18 | |
| FMOVD $JUNK, F19 | |
| FMOVD $JUNK, F20 | |
| FMOVD $JUNK, F21 | |
| FMOVD $JUNK, F22 | |
| FMOVD $JUNK, F23 | |
| FMOVD $JUNK, F24 | |
| FMOVD $JUNK, F25 | |
| FMOVD $JUNK, F26 | |
| FMOVD $JUNK, F27 | |
| FMOVD $JUNK, F28 | |
| FMOVD $JUNK, F29 | |
| FMOVD $JUNK, F30 | |
| FMOVD $JUNK, F31 | |
| RET |
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| package main | |
| import "testing" | |
| type BigStruct struct { | |
| a bool | |
| b, c uint8 | |
| d, e uint32 | |
| } | |
| //go:noinline | |
| func MakeBigStruct() BigStruct { | |
| return BigStruct{} | |
| } | |
| var sink BigStruct | |
| func fillregs() | |
| func TestCrash(t *testing.T) { | |
| for { | |
| fillregs() | |
| sink = MakeBigStruct() | |
| } | |
| } |
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