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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 - DW_AT_name for DW_TAG_label removes one leading underscore from the symbol name"
href="https://bugs.llvm.org/show_bug.cgi?id=37470">37470</a>
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<th>Summary</th>
<td>DW_AT_name for DW_TAG_label removes one leading underscore from the symbol name
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>
<tr>
<th>Component</th>
<td>MC
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dimitry@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<pre>This is kind of confusing because there is no way to say when it was removed.
Also I was trying to find if it should be removed and it does not seem there is
anything saying that.
Here is the resulted dwarf for bionic _exit.S file:
$ readelf -wai
out/soong/.intermediates/bionic/libc/libc_syscalls/android_arm_armv8-a_cortex-a73_core_static/obj/bionic/libc/arch-arm/syscalls/_exit.o
Contents of the .debug_info section:
Compilation Unit @ offset 0x0:
Length: 0x168 (32-bit)
Version: 4
Abbrev Offset: 0x0
Pointer Size: 4
<0><b>: Abbrev Number: 1 (DW_TAG_compile_unit)
<c> DW_AT_stmt_list : 0x0
<10> DW_AT_low_pc : 0x0
<14> DW_AT_high_pc : 0x20
<18> DW_AT_name : bionic/libc/arch-arm/syscalls/_exit.S
<3e> DW_AT_comp_dir : /proc/self/cwd
<4d> DW_AT_producer : Android (4679922 based on r326829) clang version
7.0.1 (<a href="https://android.googlesource.com/toolchain/clang">https://android.googlesource.com/toolchain/clang</a>
32fb8450f65708b63c9a35046b2d1ee775e08733)
(<a href="https://android.googlesource.com/toolchain/llvm">https://android.googlesource.com/toolchain/llvm</a>
67f3e6a51d93777841e0fb6d07f71fdf343df239) (based on LLVM 7.0.1svn)
<154> DW_AT_language : 32769 (MIPS assembler)
<1><156>: Abbrev Number: 2 (DW_TAG_label)
<157> DW_AT_name : exit
<15c> DW_AT_decl_file : 0x1
<160> DW_AT_decl_line : 0x14
<164> DW_AT_low_pc : 0x0
<168> DW_AT_prototyped : 0
<2><169>: Abbrev Number: 3 (DW_TAG_unspecified_parameters)
<2><16a>: Abbrev Number: 0
<1><16b>: Abbrev Number: 0
Contents of the .debug_abbrev section:
Number TAG (0x0)
1 DW_TAG_compile_unit [has children]
DW_AT_stmt_list DW_FORM_sec_offset
DW_AT_low_pc DW_FORM_addr
DW_AT_high_pc DW_FORM_addr
DW_AT_name DW_FORM_string
DW_AT_comp_dir DW_FORM_string
DW_AT_producer DW_FORM_string
DW_AT_language DW_FORM_data2
DW_AT value: 0 DW_FORM value: 0
2 DW_TAG_label [has children]
DW_AT_name DW_FORM_string
DW_AT_decl_file DW_FORM_data4
DW_AT_decl_line DW_FORM_data4
DW_AT_low_pc DW_FORM_addr
DW_AT_prototyped DW_FORM_flag
DW_AT value: 0 DW_FORM value: 0
3 DW_TAG_unspecified_parameters [no children]
DW_AT value: 0 DW_FORM value: 0
The expected DW_AT_name here is "_exit" because this is the name used for the
exported symbol.</pre>
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