diff options
Diffstat (limited to 'src/runtime/proc.go')
| -rw-r--r-- | src/runtime/proc.go | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/runtime/proc.go b/src/runtime/proc.go index 3ace2b329b..32fe877041 100644 --- a/src/runtime/proc.go +++ b/src/runtime/proc.go @@ -4425,7 +4425,7 @@ func sigprof(pc, sp, lr uintptr, gp *g, mp *m) { return } - // On mips{,le}, 64bit atomics are emulated with spinlocks, in + // On mips{,le}/arm, 64bit atomics are emulated with spinlocks, in // runtime/internal/atomic. If SIGPROF arrives while the program is inside // the critical section, it creates a deadlock (when writing the sample). // As a workaround, create a counter of SIGPROFs while in critical section @@ -4438,6 +4438,13 @@ func sigprof(pc, sp, lr uintptr, gp *g, mp *m) { return } } + if GOARCH == "arm" && goarm < 7 && GOOS == "linux" && pc&0xffff0000 == 0xffff0000 { + // runtime/internal/atomic functions call into kernel + // helpers on arm < 7. See + // runtime/internal/atomic/sys_linux_arm.s. + cpuprof.lostAtomic++ + return + } } // Profiling runs concurrently with GC, so it must not allocate. |