Bug ID 37190
Summary ‘memory read’ reports 0s for unreadable memory on FreeBSD
Product lldb
Version unspecified
Hardware PC
OS Windows NT
Status NEW
Severity enhancement
Priority P
Component All Bugs
Assignee lldb-dev@lists.llvm.org
Reporter emaste@freebsd.org
CC llvm-bugs@lists.llvm.org
ptrace returns an error but it's not propagated to the user:
(lldb) memory read -format hex -size 8 0
reebsd.operationptrace(PT_IO, 92788, 0x7fffdedfaed8, 0) called from file
/tank/emaste/src/git-stable-11/contrib/llvm/tools/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp
line 166
reebsd.operationPT_IO: op=READ_D offs=0 size=512
reebsd.operationptrace() failed; errno=14 (<unknown>)
0x00000000: 0x0000000000000000 0x0000000000000000
0x00000010: 0x0000000000000000 0x0000000000000000
0x00000020: 0x0000000000000000 0x0000000000000000
0x00000030: 0x0000000000000000 0x0000000000000000
I tried as far back as lldb37 and it fails there.
(For reference, "reebsd.operation" is the thread name - final 16 chars of
"lldb.process.freebsd.operation"; it seems "-n" mode is enabled by default in
"log enable posix all"?)