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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 - libsanitizer fails to build with 64-bit time_t"
href="https://bugs.llvm.org/show_bug.cgi?id=45138">45138</a>
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</tr>
<tr>
<th>Summary</th>
<td>libsanitizer fails to build with 64-bit time_t
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>asan
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>arnd@linaro.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>I tried building libsanitizer as part of gcc with a modified 32-bit ARM glibc
using 64-bit time_t/off_t/ino_t, and saw several failed assertions on 'struct
dirent' and 'struct timeb':
339 | typedef char IMPL_PASTE(assertion_failed_##_,
line)[2*(int)(pred)-1]
|
^
../../../../src/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:333:30:
note: in expansion of macro 'IMPL_COMPILER_ASSERT'
333 | #define COMPILER_CHECK(pred) IMPL_COMPILER_ASSERT(pred, __LINE__)
| ^~~~~~~~~~~~~~~~~~~~
../../../../src/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h:1495:3:
note: in expansion of macro 'COMPILER_CHECK'
1495 | COMPILER_CHECK(sizeof(__sanitizer_##TYPE) == sizeof(TYPE))
| ^~~~~~~~~~~~~~
../../../../src/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:1213:1:
note: in expansion of macro 'CHECK_TYPE_SIZE'
1213 | CHECK_TYPE_SIZE(timeb);
| ^~~~~~~~~~~~~~~
../../../../src/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:339:70:
warning: size of array 'assertion_failed__1213' is not an integral
constant-expression [-Wpedantic]
In particular:
CHECK_SIZE_AND_OFFSET(dirent, d_ino);
CHECK_SIZE_AND_OFFSET(dirent, d_off);
CHECK_SIZE_AND_OFFSET(dirent, d_reclen);
CHECK_TYPE_SIZE(timeb);
CHECK_SIZE_AND_OFFSET(timeb, time);
CHECK_SIZE_AND_OFFSET(timeb, millitm);
CHECK_SIZE_AND_OFFSET(timeb, timezone);
CHECK_SIZE_AND_OFFSET(timeb, dstflag);
These 64-bit types are becoming the default for new 32-bit architectures, as
well as for some distros that care about running beyond 2038 when the 32-bit
time_t overflows.
I reported the same issue in the gcc bugzilla as
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94076">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94076</a>, but was sent here instead
(I hope I got the right place this time).</pre>
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