<html>
<head>
<base href="http://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - libclang (via Python bindings), is_definition() is different for structs on x84_64 and aarch64"
href="http://llvm.org/bugs/show_bug.cgi?id=19759">19759</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>libclang (via Python bindings), is_definition() is different for structs on x84_64 and aarch64
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.4
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>libclang
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.abdurachmanov@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>We have a Python script using libclang. It walks over AST to collect
information about structures. I am porting code to aarch64 (ARMv8) and found
that script does not produce any content. This is because is_definition()
return value is different between x86_64 and aarch64.
Example:
/usr/include/time.h
### Fedora 19, AArch64 (ARMv8) ###
[2014-05-15 16:03:42,980] DEBUG: Child: <clang.cindex.Cursor object at
0x17e993b0> | timespec | timespec, kind: CursorKind.STRUCT_DECL, is_definition:
False, location: <SourceLocati
on file '/usr/include/time.h', line 120, column 8>
118 /* POSIX.1b structure for a time value. This is like a `struct
timeval' but
119 has nanoseconds instead of microseconds. */
120 struct timespec
121 {
122 __time_t tv_sec; /* Seconds. */
123 __syscall_slong_t tv_nsec; /* Nanoseconds. */
124 };
### RHEL6, x86_64 ###
[2014-05-15 21:58:46,767] DEBUG: Child: <clang.cindex.Cursor object at
0x2468560> | timespec | timespec, kind: CursorKind.STRUCT_DECL, is_definition:
True, location: <SourceLocation file '/usr/include/time.h', line 120, column 8>
[2014-05-15 21:58:46,767] DEBUG: Found struct/class/template definition:
timespec
[2014-05-15 21:58:46,767] DEBUG: Skipping since it is an external of this
package: timespec
118 /* POSIX.1b structure for a time value. This is like a `struct timeval'
but
119 has nanoseconds instead of microseconds. */
120 struct timespec
121 {
122 __time_t tv_sec; /* Seconds. */
123 long int tv_nsec; /* Nanoseconds. */
124 };
125
But with clang -Xclang -ast-dump -fsyntax-only
|-RecordDecl 0x85fb030 </usr/include/time.h:120:1, line:124:3> struct timespec
definition
| |-FieldDecl 0x85fb100 <line:122:5, col:14> tv_sec '__time_t':'long'
| `-FieldDecl 0x85fb180 <line:123:5, col:23> tv_nsec '__syscall_slong_t':'long'
|-RecordDecl 0x39e1e70 </usr/include/time.h:120:1, line:124:3> struct timespec
definition
| |-FieldDecl 0x39e1f40 <line:122:5, col:14> tv_sec '__time_t':'long'
| `-FieldDecl 0x39e1fa0 <line:123:5, col:14> tv_nsec 'long'
On both machines it says "struct timespec definition".
Something like that is good enough to reproduce:
$ cat check.py
import sys
import clang.cindex
def find_typerefs(node):
for child in node.get_children():
print("{0} {1} {2} {3}".format(child.displayname, child.kind,
child.is_definition(), child.location))
find_typerefs(child)
index = clang.cindex.Index.create()
tu = index.parse(sys.argv[1])
print 'Translation unit:', tu.spelling
find_typerefs(tu.cursor)
$ python check.py /usr/include/time.h
# x86_64 #
timespec CursorKind.STRUCT_DECL True <SourceLocation file
'/usr/include/time.h', line 120, column 8>
tv_sec CursorKind.FIELD_DECL True <SourceLocation file '/usr/include/time.h',
line 122, column 14>
__time_t CursorKind.TYPE_REF False <SourceLocation file '/usr/include/time.h',
line 122, column 5>
tv_nsec CursorKind.FIELD_DECL True <SourceLocation file '/usr/include/time.h',
line 123, column 14>
# aarch64 #
timespec CursorKind.STRUCT_DECL False <SourceLocation file
'/usr/include/time.h', line 120, column 8>
tv_sec CursorKind.FIELD_DECL True <SourceLocation file '/usr/include/time.h',
line 122, column 14>
__time_t CursorKind.TYPE_REF False <SourceLocation file '/usr/include/time.h',
line 122, column 5>
tv_nsec CursorKind.FIELD_DECL True <SourceLocation file '/usr/include/time.h',
line 123, column 23>
__syscall_slong_t CursorKind.TYPE_REF False <SourceLocation file
'/usr/include/time.h', line 123, column 5>
Is there any issues with libclang or/and python binding on aarch64?</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>