[lldb-dev] LLDB sometimes escapes unicode characters, sometimes not
Lutz Justen via lldb-dev
lldb-dev at lists.llvm.org
Mon Mar 23 08:00:11 PDT 2020
Hey,
We've noticed that LLDB sometimes escapes certain characters (e.g. in the
+128/negative range) of const char* strings and sometimes it doesn't. In
particular, this happens for unicode strings:
C++:
const char* str = u8"😂";
LLDB:
(lldb) expr str
(const char *) $0 = 0x00007ff662489d18 "😂"
(lldb) expr (const char*)str
(const char *) $1 = 0x00007ff662489d18
"\xfffffff0\xffffff9f\xffffff98\xffffff82"
To my understanding, evaluating 'str' and '(const char*)str' should be the
same since str is already a const char*.
We've found that the code takes a different path at this location:
https://source.corp.google.com/piper///depot/google3/third_party/llvm/llvm-project/lldb/source/Core/FormatEntity.cpp;l=865;rcl=294541377
Any idea what's going on? We'd like to get the unescaped strings. Is it
possible to enforce this?
Thanks,
- Lutz
--
Dr. Lutz Justen
Software Engineer
ljusten at google.com
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