path: root/vm_dump.c
diff options
authornaruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-08-29 18:43:17 (GMT)
committernaruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-08-29 18:43:17 (GMT)
commit1d3665fd0d5d79f2772d34a6930d7fe812c8e8d0 (patch)
treea6af49ad8ece2437901e19d81f0e3d4e9ffcc064 /vm_dump.c
parente38a2ec5c057fc4e98050d6e251a4c54e91aa4a5 (diff)
* vm_dump.c (backtrace): use rip in the saved context for the case
the SIGSEGV is received when the process is in userland. Note that ip in the stack should be used if the signal is received when it is in kernel (when it is calling syscall) [Bug #12711] git-svn-id: svn+ssh:// b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'vm_dump.c')
1 files changed, 3 insertions, 0 deletions
diff --git a/vm_dump.c b/vm_dump.c
index c0f0685..f8cde6d 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -470,6 +470,9 @@ darwin_sigtramp:
unw_set_reg(&cursor, UNW_X86_64_R14, uctx->uc_mcontext->__ss.__r14);
unw_set_reg(&cursor, UNW_X86_64_R15, uctx->uc_mcontext->__ss.__r15);
ip = *(unw_word_t*)uctx->uc_mcontext->__ss.__rsp;
+ if (!ip) { /* signal received in syscall */
+ ip = uctx->uc_mcontext->__ss.__rip;
+ }
unw_set_reg(&cursor, UNW_REG_IP, ip);
trace[n++] = (void *)uctx->uc_mcontext->__ss.__rip;
trace[n++] = (void *)ip;