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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - String formatter regex wrongly catching multi-dimensional types as well."
href="https://bugs.llvm.org/show_bug.cgi?id=47766">47766</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>String formatter regex wrongly catching multi-dimensional types as well.
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chirag@raincode.com
</td>
</tr>
<tr>
<th>CC</th>
<td>jdevlieghere@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>For a simple C program,
struct b {
char i[2][4];
};
int main() {
struct b z;
z.i[0][0] = 'F';
z.i[0][1] = 'O';
z.i[0][2] = 'O';
z.i[0][3] = 0;
z.i[1][0] = 'B';
z.i[1][1] = 'A';
z.i[1][2] = 'R';
z.i[1][3] = 0;
return 0;
}
while printing variable z, the type summary finder finds the summary provider
because it matches the regex "char [[0-9]+]" while looking for char [2][4] and
failing while printing due to not knowing how to handle the datatype.
(As per conversation on lldb-dev mail thread)The regex should be "char
[[0-9]+]$" with string terminator anchor to start matching at end to avoid
trying to print multi-dimensional data.
============================================================================
LLDB
currently,
(lldb) target create "/home/chirag/a.out"
Current executable set to '/home/chirag/a.out' (x86_64).
(lldb) b 15
Breakpoint 1: where = a.out`main + 36 at struct.c:15, address =
0x0000000000400511
(lldb) r
Process 57100 launched: '/home/chirag/a.out' (x86_64)
Process 57100 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x0000000000400511 a.out`main at struct.c:15
12 z.i[1][1] = 'A';
13 z.i[1][2] = 'R';
14 z.i[1][3] = 0;
-> 15 return 0;
16 }
(lldb) p z
(b) $0 = (i = char [2][4] @ 0x0000000001fe3ca0)
(lldb) q
============================================================================
GDB
while gdb prints as expected,
Reading symbols from /home/chirag/a.out...done.
(gdb) b 15
Breakpoint 1 at 0x400511: file Desktop/test/struct.c, line 15.
(gdb) r
Starting program: /home/chirag/./a.out
Breakpoint 1, main () at Desktop/test/struct.c:15
15 return 0;
Missing separate debuginfos, use: debuginfo-install glibc-2.17-307.el7.1.x86_64
(gdb) p z
$1 = {i = {"FOO", "BAR"}}
(gdb) q
A debugging session is active.</pre>
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