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<body><span class="vcard"><a class="email" href="mailto:dan.mcgregor@usask.ca" title="Dan McGregor <dan.mcgregor@usask.ca>"> <span class="fn">Dan McGregor</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - -fdebug-prefix-map is a no-op for .S files"
href="https://bugs.llvm.org/show_bug.cgi?id=38050">bug 38050</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>RESOLVED
</td>
<td>REOPENED
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>FIXED
</td>
<td>---
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>dan.mcgregor@usask.ca
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - -fdebug-prefix-map is a no-op for .S files"
href="https://bugs.llvm.org/show_bug.cgi?id=38050#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - -fdebug-prefix-map is a no-op for .S files"
href="https://bugs.llvm.org/show_bug.cgi?id=38050">bug 38050</a>
from <span class="vcard"><a class="email" href="mailto:dan.mcgregor@usask.ca" title="Dan McGregor <dan.mcgregor@usask.ca>"> <span class="fn">Dan McGregor</span></a>
</span></b>
<pre>This *nearly* fixes the issue. It doesn't handle the case where the full path
to the assembly file is specified on the command line. This is after the code
was committed:
$ clang-7 -g -c -o hello.o $PWD/hello.c -fdebug-prefix-map=$PWD=/src_root
$ strings hello.o|grep $PWD
$ clang-7 -g -c -o crti.o $PWD/crti.S -fdebug-prefix-map=$PWD=/src_root
$ strings crti.o|grep $PWD
/tmp/test/crti.S
The compilation directory is changed correctly and the DW_TAG_label values are
correct, but not DW_TAG_compile_unit:
$ llvm-dwarfdump crti.o
crti.o: file format ELF64-x86-64
.debug_info contents:
0x00000000: Compile Unit: length = 0x00000119 version = 0x0002 abbr_offset =
0x0000 addr_size = 0x08 (next unit at 0x0000011d)
0x0000000b: DW_TAG_compile_unit
DW_AT_stmt_list (0x00000000)
DW_AT_low_pc (0x0000000000000000)
DW_AT_high_pc (0x0000000000000004)
DW_AT_name ("/tmp/test/crti.S")
DW_AT_comp_dir ("/src_root")
DW_AT_producer ("clang version 7.0.0 (based on LLVM 7.0.0)")
DW_AT_language (DW_LANG_Mips_Assembler)
0x000000ea: DW_TAG_label
DW_AT_name ("init")
DW_AT_decl_file ("/src_root/crti.S")
DW_AT_decl_line (16)
DW_AT_low_pc (0x0000000000000000)
DW_AT_prototyped (0x00)
0x00000101: DW_TAG_unspecified_parameters
0x00000102: NULL
0x00000103: DW_TAG_label
DW_AT_name ("fini")
DW_AT_decl_file ("/src_root/crti.S")
DW_AT_decl_line (23)
DW_AT_low_pc (0x0000000000000000)
DW_AT_prototyped (0x00)
0x0000011a: DW_TAG_unspecified_parameters
0x0000011b: NULL
0x0000011c: NULL</pre>
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