https://bugs.kde.org/show_bug.cgi?id=445235
Bug ID: 445235
Summary: Java/Ada/D demangling is probably broken
Product: valgrind
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: n.netherc...@gmail.com
CC: jsew...@acm.org, m...@klomp.org,
philippe.waroqui...@skynet.be
Depends on: 445184
Target Milestone: ---
+++ This bug was initially created as a clone of Bug #445184 +++
Valgrind has code to demangle symbols for: C++, Rust, Java, Ada, and D. But the
Java/Ada/D demangling is probably broken because the code is unreachable.
`VG_(demangle)` has an initial test that requires that the first two chars be
"_Z" or "_R", which excludes a bunch of cases. Also, the code in
`ML_(cplus_demangle)` that calls the demanglers for Java/Ada/D is a bit
different to that for C++ and Rust (in the way the `*_DEMANGLING` constants are
used), which may also be a problem.
>From a quick look at the code, I think the following is true.
- C++ symbols usually start with "_Z", but "_GLOBAL_" is also possible, which
won't work.
- Rust symbols start with "_Z" or "_R".
- Java symbols are a subset of C++ symbols, so should be ok, modulo possible
"_GLOBAL_" cases, and possible AUTO_DEMANGLING problems.
- D symbols start with "_D", and so will be broken.
- Ada symbols can start with "_ada_", or with a lower-case letter, and so will
be broken.
Referenced Bugs:
https://bugs.kde.org/show_bug.cgi?id=445184
[Bug 445184] Rust v0 symbol demangling is broken
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