[lldb-dev] [Bug 36438] New: Unable to step into __cxa_allocate_exception

[via lldb-dev]

https://bugs.llvm.org/show_bug.cgi?id=36438

            Bug ID: 36438
           Summary: Unable to step into __cxa_allocate_exception
           Product: lldb
           Version: 6.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: dantipov at nvidia.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 19902
  --> https://bugs.llvm.org/attachment.cgi?id=19902&action=edit
Sample program

$ /home/dantipov/.local/llvm-6.0.0/bin/lldb t-throw
(lldb) target create "t-throw"
Current executable set to 't-throw' (x86_64).
(lldb) b t-throw.cc:10
Breakpoint 1: where = t-throw`main + 18 at t-throw.cc:10, address =
0x00000000004009a9
(lldb) r
Process 22330 launched: '/home/dantipov/tmp/t-throw' (x86_64)
Process 22330 stopped
* thread #1, name = 't-throw', stop reason = breakpoint 1.1
    frame #0: 0x00000000004009a9 t-throw`main(argc=1, argv=0x00007fffffffe2f8)
at t-throw.cc:10
   7        try {
   8          try {
   9            try {
-> 10             throw new T ();
   11           } catch (...) {
   12             throw;
   13           }
(lldb) step
gotcha
Process 22330 exited with status = 1 (0x00000001) 

vs:

$ gdb -q t-throw 
Reading symbols from t-throw...done.
(gdb) b t-throw.cc:10
Breakpoint 1 at 0x4009a9: file t-throw.cc, line 10.
(gdb) r
Starting program: /home/dantipov/tmp/t-throw 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Breakpoint 1, main (argc=1, argv=0x7fffffffe2f8) at t-throw.cc:10
10                throw new T ();
(gdb) s
__cxxabiv1::__cxa_allocate_exception (thrown_size=8) at
../../../../libstdc++-v3/libsupc++/eh_alloc.cc:280
280     {
(gdb) bt
#0  __cxxabiv1::__cxa_allocate_exception (thrown_size=8) at
../../../../libstdc++-v3/libsupc++/eh_alloc.cc:280
#1  0x00000000004009b3 in main (argc=1, argv=0x7fffffffe2f8) at t-throw.cc:10

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