Author: emaste
Date: Thu May 25 16:41:07 2017
New Revision: 318884
URL: https://svnweb.freebsd.org/changeset/base/318884
Log:
lldb: map TRAP_CAP to a trace trap
In the absense of a more specific handler for TRAP_CAP (generated by
ENOTCAPABLE or ECAPMODE while in capability mode) treat it as a trace
trap.
Example usage (testing the bug in PR219173):
% proccontrol -m trapcap lldb usr.bin/hexdump/obj/hexdump -- -Cv -s 1 /bin/ls
...
(lldb) run
Process 12980 launching
Process 12980 launched: '.../usr.bin/hexdump/obj/hexdump' (x86_64)
Process 12980 stopped
* thread #1, stop reason = trace
frame #0: 0x0000004b80c65f1a libc.so.7`__sys_lseek + 10
...
In the future we should have LLDB control the trapcap procctl itself
(as it does with ASLR), as well as report a specific stop reason.
This change eliminates an assertion failure from LLDB for now.
Modified:
head/contrib/llvm/tools/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp
Modified:
head/contrib/llvm/tools/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp
==============================================================================
---
head/contrib/llvm/tools/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp
Thu May 25 16:31:53 2017 (r318883)
+++
head/contrib/llvm/tools/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp
Thu May 25 16:41:07 2017 (r318884)
@@ -1132,6 +1132,8 @@ ProcessMessage ProcessMonitor::MonitorSI
case 0:
case TRAP_TRACE:
+ // Map TRAP_CAP to a trace trap in the absense of a more specific handler.
+ case TRAP_CAP:
if (log)
log->Printf("ProcessMonitor::%s() received trace event, tid = %" PRIu64
" : si_code = %d",
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