[lldb-dev] [Bug 45608] New: lldb not stopped at a inline function call statement

[via lldb-dev]

https://bugs.llvm.org/show_bug.cgi?id=45608

            Bug ID: 45608
           Summary: lldb not stopped at a inline function call statement
           Product: lldb
           Version: 9.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: yangyibiao at hust.edu.cn
                CC: jdevlieghere at apple.com, llvm-bugs at lists.llvm.org

$ lldb --version
lldb version 9.0.1


$ cat small.c
__attribute__((always_inline))
inline void foo(int *x) {
  *x = 1;
}

int main() {
  int x;
  foo(&x);
  return x;
}


$ clang -g small.c; lldb ./a.out
(lldb) target create "./a.out"
Current executable set to './a.out' (x86_64).
(lldb) breakpoint set -f small.c -l 8
Breakpoint 1: where = a.out`main + 46 at small.c:9:10, address =
0x000000000000116e
(lldb) run
Process 40617 launched: '/home/yibiao/cv-gcov/a.out' (x86_64)
Process 40617 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
    frame #0: 0x000055555555516e a.out`main at small.c:9:10
   6    int main() {
   7      int x;
   8      foo(&x);
-> 9      return x;
   10   }


/*** 
when setting breakpoint at line 8 in small.c, it stopped at line 9.
However, when we using "process launch --stop-at-entry" and then setting
breakpoint on address main+0. It will stopped at line 8 as follows:
***/


$ clang -g small.c; lldb ./a.out
(lldb) target create "./a.out"
Current executable set to './a.out' (x86_64).
(lldb) process launch --stop-at-entry
Process 40841 launched: '/home/yibiao/cv-gcov/a.out' (x86_64)
(lldb) breakpoint set -a main+0
Breakpoint 1: where = a.out`main at small.c:6, address = 0x0000555555555140
(lldb) c
Process 40841 resuming
Process 40841 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
    frame #0: 0x0000555555555140 a.out`main at small.c:6
   3      *x = 1;
   4    }
   5    
-> 6    int main() {
   7      int x;
   8      foo(&x);
   9      return x;
(lldb) step
Process 40841 stopped
* thread #1, name = 'a.out', stop reason = step in
    frame #0: 0x0000555555555164 a.out`main at small.c:8
   5    
   6    int main() {
   7      int x;
-> 8      foo(&x);
   9      return x;
   10   }


/***
It seems that this is an inconsistent behavior in lldb. 
***/

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