https://bugs.llvm.org/show_bug.cgi?id=45603
Bug ID: 45603
Summary: lldb wrongly stopped at a return statement within a
for loop
Product: lldb
Version: 9.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: lldb-dev@lists.llvm.org
Reporter: yangyib...@hust.edu.cn
CC: jdevliegh...@apple.com, llvm-b...@lists.llvm.org
$ lldb -v
lldb version 9.0.1
$ cat small.c
int main()
{
int j = 0, d = 0;
if (j>=0)
for (; d; d++)
return 0;
return 0;
}
$ clang -g small.c; lldb ./a.out
(lldb) target create "./a.out"
Current executable set to './a.out' (x86_64).
(lldb) b small.c:5
Breakpoint 1: where = a.out`main + 35 at small.c:5:5, address =
0x0000000000001143
(lldb) run
Process 877280 launched: '/home/yibiao/cv-gcov/a.out' (x86_64)
Process 877280 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x0000555555555143 a.out`main at small.c:5:5
2 {
3 int j = 0, d = 0;
4 if (j>=0)
-> 5 for (; d; d++)
6 return 0;
7 return 0;
8 }
(lldb) fr v
(int) j = 0
(int) d = 0
(lldb) step
Process 877280 stopped
* thread #1, name = 'a.out', stop reason = step in
frame #0: 0x000055555555515e a.out`main at small.c:6:14
3 int j = 0, d = 0;
4 if (j>=0)
5 for (; d; d++)
-> 6 return 0;
7 return 0;
8 }
(lldb) step
Process 877280 stopped
* thread #1, name = 'a.out', stop reason = step in
frame #0: 0x0000555555555163 a.out`main at small.c:7:3
4 if (j>=0)
5 for (; d; d++)
6 return 0;
-> 7 return 0;
8 }
*****
lldb is wrongly stopped at line 6. Before that, d is 0. Thus, the 6th statement
should be not executed.
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