diff options
Diffstat (limited to 'usr/src/uts/common/dtrace/dtrace.c')
| -rw-r--r-- | usr/src/uts/common/dtrace/dtrace.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/usr/src/uts/common/dtrace/dtrace.c b/usr/src/uts/common/dtrace/dtrace.c index 9b53e08b6a..8184bc27b9 100644 --- a/usr/src/uts/common/dtrace/dtrace.c +++ b/usr/src/uts/common/dtrace/dtrace.c @@ -21,7 +21,7 @@ /* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2017, Joyent, Inc. + * Copyright (c) 2018, Joyent, Inc. * Copyright (c) 2012, 2014 by Delphix. All rights reserved. */ @@ -3539,6 +3539,25 @@ dtrace_dif_variable(dtrace_mstate_t *mstate, dtrace_state_t *state, uint64_t v, return ((uint64_t)lwp->lwp_errno); } + + case DIF_VAR_THREADNAME: + /* + * See comment in DIF_VAR_PID. + */ + if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU)) + return (0); + + if (curthread->t_name == NULL) + return (0); + + /* + * Once set, ->t_name itself is never changed: any updates are + * made to the same buffer that we are pointing out. So we are + * safe to dereference it here. + */ + return (dtrace_dif_varstr((uintptr_t)curthread->t_name, + state, mstate)); + default: DTRACE_CPUFLAG_SET(CPU_DTRACE_ILLOP); return (0); @@ -5563,7 +5582,7 @@ next: * Stringify using RFC 1884 convention 2 - 16 bit * hexadecimal values with a zero-run compression. * Lower case hexadecimal digits are used. - * eg, fe80::214:4fff:fe0b:76c8. + * eg, fe80::214:4fff:fe0b:76c8. * The IPv4 embedded form is returned for inet_ntop, * just the IPv4 string is returned for inet_ntoa6. */ @@ -5747,7 +5766,7 @@ dtrace_dif_emulate(dtrace_difo_t *difo, dtrace_mstate_t *mstate, */ mstate->dtms_difo = difo; - regs[DIF_REG_R0] = 0; /* %r0 is fixed at zero */ + regs[DIF_REG_R0] = 0; /* %r0 is fixed at zero */ while (pc < textlen && !(*flags & CPU_DTRACE_FAULT)) { opc = pc; |