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<head>
<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - LTO is broken on 32-bit hosts"
href="https://llvm.org/bugs/show_bug.cgi?id=29020">29020</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>LTO is broken on 32-bit hosts
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hjl.tools@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, tejohnson@google.com
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>gold has
--map-whole-files Map whole files to memory (default on 64-bit
hosts)
--no-map-whole-files Map relevant file parts to memory (default on
32-bit hosts)
On 32-bit hosts, the view is released by
void
File_read::clear_views(Clear_views_mode mode)
{
bool keep_files_mapped = (parameters->options_valid()
&& parameters->options().keep_files_mapped());
Views::iterator p = this->views_.begin();
while (p != this->views_.end())
{
bool should_delete;
if (p->second->is_locked() || p->second->is_permanent_view())
should_delete = false;
else if (mode == CLEAR_VIEWS_ALL)
should_delete = true;
else if ((p->second->should_cache()
|| p->second == this->whole_file_view_)
^^^^^^^^^^^^^^^^^^^^^^ This is NULL on 32-bit
hosts.
&& keep_files_mapped)
should_delete = false;
else if (this->object_count_ > 1
&& p->second->accessed()
&& mode != CLEAR_VIEWS_ARCHIVE)
should_delete = false;
else
should_delete = true;
from:
#0 0xf71e8650 in munmap () from /libx32/libc.so.6
#1 0x005c8be5 in gold::File_read::View::~View (this=<optimized out>,
__in_chrg=<optimized out>)
at /export/linux/src/binutils/binutils/gold/fileread.cc:139
#2 0x005ca045 in gold::File_read::clear_views (this=this@entry=0xad1248,
mode=mode@entry=gold::File_read::CLEAR_VIEWS_NORMAL)
at /export/linux/src/binutils/binutils/gold/fileread.cc:819
#3 0x005ca1ed in gold::File_read::release (this=this@entry=0xad1248)
at /export/linux/src/binutils/binutils/gold/fileread.cc:279
#4 0x005ca27a in gold::File_read::unlock (this=<optimized out>,
task=<optimized out>)
at /export/linux/src/binutils/binutils/gold/fileread.cc:307
#5 0x0068570e in gold::Object::unlock (this=<optimized out>, t=<optimized
out>)
at /export/linux/src/binutils/binutils/gold/object.h:505
#6 gold::Plugin_manager::release_input_file (this=<optimized out>,
handle=<optimized out>) at
/export/linux/src/binutils/binutils/gold/plugin.cc:802
#7 0xf2ccad36 in (anonymous namespace)::PluginInputFile::~PluginInputFile (
this=0xffff8fb0, __in_chrg=<optimized out>)
at /export/gnu/import/git/llvm-x32/tools/gold/gold-plugin.cpp:77
#8 0xf2cceb3b in allSymbolsReadHook ()
at /export/gnu/import/git/llvm-x32/tools/gold/gold-plugin.cpp:814
#9 0xf2ccefc7 in all_symbols_read_hook ()
at /export/gnu/import/git/llvm-x32/tools/gold/gold-plugin.cpp:860
Passing --map-whole-files to gold is a workaround.</pre>
</div>
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