Benjamin Wester bwester
bwester
/ exec-deadlock.stack
Created
April 15, 2022 04:28
Stack dump of exec-deadlock.go when it has deadlocked.
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| Compile environment: CGO_ENABLED=0 | |
| Compiled with go1.18.1 .tar.gz release for darwin/amd64 | |
| Run on darwin/amd64 (macOS 11.6.5) | |
| Output obtained from a dlv debugging session: | |
| ============================================================ | |
| (dlv) goroutines | |
| Goroutine 1 - User: /opt/go1.18.1/src/runtime/os_darwin.go:348 syscall.runtime_BeforeExec (0x1058dd3) | |
| Goroutine 2 - User: /opt/go1.18.1/src/runtime/proc.go:362 runtime.gopark (0x1031fb6) [force gc (idle)] | |
| Goroutine 3 - User: /opt/go1.18.1/src/runtime/proc.go:362 runtime.gopark (0x1031fb6) [finalizer wait] |
bwester
/ exec-deadlock.go
Created
April 15, 2022 04:27
A minimal Go program that can cause a deadlock in the Exec call. Compile with CGO_ENABLED=0. Tested on macOS 11.6.5, go1.18.1 darwin/amd64.
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| package main | |
| import ( | |
| "log" | |
| "os" | |
| "os/signal" | |
| "syscall" | |
| ) | |
| func main() { |
bwester
/ deadlock-hermit-0.18.3-go-db7183ccf9.txt
Created
April 11, 2022 15:55
DLV and SIGQUIT info for Hermit, built with Go @ db7183ccf9, when it has deadlocked
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| Hermit v0.18.3 (Square internal wrapper) | |
| compile environment: CGO_ENABLED=0 | |
| compiled with Go @ db7183ccf9 | |
| run environment: GOTRACEBACK=crash | |
| arch: amd64 | |
| os: darwin (macOS 11.6.3) | |
| output 1: DLV session attached to the deadlocked process | |
| output 2: output after receiving SIGQUIT | |
| ------------------------------ |
bwester
/ hermit-crash.txt
Created
April 8, 2022 23:21
The output generated by pressing Ctrl-\ for a Hermit process after it has locked up — OS: macOS 11.6.3 — arch: amd64 — Hermit version: v0.18.3 — Hermit built with: go1.17.7
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| ^\SIGQUIT: quit | |
| PC=0x7fff20376cde m=0 sigcode=0 | |
| goroutine 0 [idle]: | |
| runtime.pthread_cond_wait(0x14b5e20, 0x14b5de0) | |
| /usr/local/opt/go/libexec/src/runtime/sys_darwin.go:444 +0x34 fp=0x7ffeefbfe6e8 sp=0x7ffeefbfe6c0 pc=0x1051094 | |
| runtime.semasleep(0xffffffffffffffff) | |
| /usr/local/opt/go/libexec/src/runtime/os_darwin.go:66 +0xad fp=0x7ffeefbfe740 sp=0x7ffeefbfe6e8 pc=0x102e44d | |
| runtime.notesleep(0x14b5bd0) | |
| /usr/local/opt/go/libexec/src/runtime/lock_sema.go:182 +0x85 fp=0x7ffeefbfe770 sp=0x7ffeefbfe740 pc=0x100aea5 |
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| * I have a public key whose fingerprint is C699 0BE1 D8BC 26B5 869D 831E B9D5 651A 2431 5C1F | |
| To claim this, I am signing this object: |