<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jan 24, 2019, at 6:15 PM, xuruobin via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Hi vedant,<o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif; text-indent: -18pt;" class=""><span class="">1.<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman";" class=""> <span class="Apple-converted-space"> </span></span></span>First, I think your theory is right that llvm’s object file reading libraries do not “understand” the architecture I’m working on. Since I’m using binutils as assembler which means llvm can only provide asm and object file is provided by biutils. I think these ELF header information is provided by my binutils now, so maybe I have to modify binutils code to provide ELF header to llvm?</div></div></div></blockquote><div><br class=""></div><div>Thanks, this helps me understand your workflow a bit better. And yes, that sounds right.</div><div><br class=""></div><br class=""><blockquote type="cite" class=""><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif; text-indent: -18pt;" class=""><o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Second, I’m sorry to say that I’m now working on llvm-4.0.0 and in ELF.cpp there is no “return getDynamicTagAsString(getHeader()->e_machine, Type);”. But I think it makes sense ELF file reader get nothing because my compiler doesn’t write these information.</div></div></div></blockquote><div><br class=""></div><div>You mentioned earlier that you're passing assembly to binutils. Perhaps binutils expects an asm directive to inform it which architecture it's targeting?</div><div><br class=""></div><br class=""><blockquote type="cite" class=""><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""> It seems I have to find somewhere(maybe an ELF file writer) to write e_machine so my reader will read this. But I have no idea where to write it now.</div></div></div></blockquote><div><br class=""></div><div>If there's no asm directive the compiler can emit, you could hack binutils to have it emit the correct e_machine bits for your architecture only.</div><div><br class=""></div><br class=""><blockquote type="cite" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><br class=""></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif; text-indent: -18pt;" class=""><span class="">2.<span style="font-style: normal; font-variant-caps: normal; font-weight: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman";" class=""> <span class="Apple-converted-space"> </span></span></span>In CoverageMapping.cpp, there is a checking “OF->getArch() != Triple(Arch).getArch()” and it makes an error if not equal. “OF->getArch” will go into a switch/case and the code enters the default branch which returns an UnknownArch. I hacked the code to make default branch return Triple::XXXX(only a temporary solution for the first point).<o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Where should I place __llvm_prf_* sections? Is it ok to put them into .rodata section?</div></div></blockquote><div><br class=""></div><div>I'm not really familiar with ELF, but as I understand it, .rodata is its own section (unlike MachO's __DATA_CONST, which is a segment). So I'm not sure that it's possible to put __llvm_prf* *in* another section.</div><div><br class=""></div><div>vedant</div><br class=""><blockquote type="cite" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""> <o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Best,<o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Ruobin<o:p class=""></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><o:p class=""> </o:p></span></div><div style="border-style: none none none solid; border-left-width: 1.5pt; border-left-color: blue; padding: 0cm 0cm 0cm 4pt;" class=""><div class=""><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><b class=""><span lang="ZH-CN" style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class="">发件人</span></b><b class=""><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class="">:</span></b><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class=""><span class="Apple-converted-space"> </span><a href="mailto:vsk@apple.com" class="">vsk@apple.com</a> [<a href="mailto:vsk@apple.com" class="">mailto:vsk@apple.com</a>]<span class="Apple-converted-space"> </span><b class=""><span lang="ZH-CN" class="">代表<span class="Apple-converted-space"> </span></span></b>Vedant Kumar<br class=""><b class=""><span lang="ZH-CN" class="">发送时间</span>:</b><span class="Apple-converted-space"> </span>2019<span lang="ZH-CN" class="">年</span>1<span lang="ZH-CN" class="">月</span>25<span lang="ZH-CN" class="">日</span><span class="Apple-converted-space"> </span>3:14<br class=""><b class=""><span lang="ZH-CN" class="">收件人</span>:</b><span class="Apple-converted-space"> </span>xuruobin <<a href="mailto:xuruobin@huawei.com" class="">xuruobin@huawei.com</a>><br class=""><b class=""><span lang="ZH-CN" class="">抄送</span>:</b><span class="Apple-converted-space"> </span><a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>; Yuchao (Michael) <<a href="mailto:michael.yuchao@huawei.com" class="">michael.yuchao@huawei.com</a>><br class=""><b class=""><span lang="ZH-CN" class="">主题</span>:</b><span class="Apple-converted-space"> </span>Re: [llvm-dev] How to add new arch for llvm-cov show?<o:p class=""></o:p></span></div></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><br class=""><br class=""><o:p class=""></o:p></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">On Jan 23, 2019, at 11:36 PM, xuruobin <<a href="mailto:xuruobin@huawei.com" style="color: purple; text-decoration: underline;" class="">xuruobin@huawei.com</a>> wrote:<o:p class=""></o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Hi vedant,</span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""> </span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div><div style="margin-left: 36pt;" class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif; text-indent: -18pt;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">1.</span><span style="font-size: 7pt; color: rgb(31, 73, 125);" class=""> <span class="apple-converted-space"> </span></span><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">The definition is from llvm/Supprot/ELF.h. But this machine information(e_machine) is given to compiler at lib/MC/ELFObjectWriter.cpp. I greped the whole llvm project and found that e_machine was assigned at only two files. One was lib/MC/ELFObjectWriter.cpp(there was an comment said “e_machine=target”) and the other was tools/obj2yaml/elf2yaml.cpp(GDB stopped only at the former one when using x86_64 llvm-cov so I thought it was MC provide this e_machine information to compiler).</span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div></div></blockquote><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">First, I think this reinforces my theory that llvm’s object file reading libraries do not “understand” the architecture you’re working on.<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">Second — and I’m not super familiar with this part of the codebase, so apologies for any mistakes here — you might have missed the ELF file reader?<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">$ git grep -iE "\<e_?machine\>” lib<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">…<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">lib/Object/ELF.cpp: return getDynamicTagAsString(getHeader()->e_machine, Type);<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><br class=""><br class=""><o:p class=""></o:p></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin-left: 36pt;" class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif; text-indent: -18pt;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">2.</span><span style="font-size: 7pt; color: rgb(31, 73, 125);" class=""> <span class="apple-converted-space"> </span></span><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">New error was “Failed to load coverage: No coverage data found” since the compiler cannot get NamesSection(at loadBinaryFormat in CoverageMappingReader.cpp). I thought it was my ldscript problem because I put __llvm_prf_names,</span><span class="apple-converted-space"><span style="color: white;" class=""> </span></span><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">__llvm_prf_cnts,</span><span class="apple-converted-space"><span style="color: white;" class=""> </span></span><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">__llvm_prf_data and __llvm_prf_vnds inside .rodata section. Compiler checked .rodata but not things inside .rodata. What’s the right position to put these 4 __llvm_prf_* sections?</span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div></div></blockquote><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">I’m not sure what changed, exactly, between the point you encountered the last error and this one. Could you elaborate?<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">This is just a shot in the dark, but you may need to teach getInstrProfSectionName about any custom linker directives needed for your architecture.<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class="">vedant<o:p class=""></o:p></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><o:p class=""> </o:p></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><br class=""><br class=""><o:p class=""></o:p></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""> </span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Best,</span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">Ruobin.</span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""> </span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div><div style="border-style: none none none solid; border-left-width: 1.5pt; border-left-color: blue; padding: 0cm 0cm 0cm 4pt;" class=""><div class=""><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: 3pt 0cm 0cm;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><b class=""><span lang="ZH-CN" style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class="">发件人</span></b><b class=""><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class="">:</span></b><span class="apple-converted-space"><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class=""> </span></span><a href="mailto:vsk@apple.com" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class="">vsk@apple.com</span></a><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class=""><span class="Apple-converted-space"> </span>[</span><a href="mailto:vsk@apple.com" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class="">mailto:vsk@apple.com</span></a><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class="">]<span class="apple-converted-space"> </span><b class=""><span lang="ZH-CN" class="">代表</span><span class="apple-converted-space"> </span></b>Vedant Kumar<br class=""><b class=""><span lang="ZH-CN" class="">发送时间</span>:</b><span class="apple-converted-space"> </span>2019<span lang="ZH-CN" class="">年</span>1<span lang="ZH-CN" class="">月</span>24<span lang="ZH-CN" class="">日</span><span class="apple-converted-space"> </span>0:12<br class=""><b class=""><span lang="ZH-CN" class="">收件人</span>:</b><span class="apple-converted-space"> </span>xuruobin <</span><a href="mailto:xuruobin@huawei.com" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class="">xuruobin@huawei.com</span></a><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class="">><br class=""><b class=""><span lang="ZH-CN" class="">抄送</span>:</b><span class="apple-converted-space"> </span></span><a href="mailto:vsk@apple.com" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class="">vsk@apple.com</span></a><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class="">;<span class="Apple-converted-space"> </span></span><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class="">llvm-dev@lists.llvm.org</span></a><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class="">; Yuchao (Michael) <</span><a href="mailto:michael.yuchao@huawei.com" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif;" class="">michael.yuchao@huawei.com</span></a><span style="font-size: 11pt; font-family: 微软雅黑, sans-serif; color: white;" class="">><br class=""><b class=""><span lang="ZH-CN" class="">主题</span>:</b><span class="apple-converted-space"> </span>Re:<span class="apple-converted-space"> </span><span lang="ZH-CN" class="">答复</span>: [llvm-dev] How to add new arch for llvm-cov show?</span><span style="color: white;" class=""><o:p class=""></o:p></span></div></div></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div><div class=""><p class="MsoNormal" style="margin: 0cm 0cm 12pt; font-size: 12pt; font-family: "Times New Roman", serif;"><span style="color: white;" class="">On Jan 23, 2019, at 1:24 AM, xuruobin <</span><a href="mailto:xuruobin@huawei.com" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">xuruobin@huawei.com</span></a><span style="color: white;" class="">> wrote:<o:p class=""></o:p></span></p></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">Hi vedant,<br class=""><br class=""> The program didn't pass the checking "OF->getArch() != Triple(Arch).getArch()" loadBinaryFormat in CoverageMappingReader.cpp and returned an error. It's because "OF->getArch()" returned null and "Triple(Arch).getArch()" returned XXXX(name of my arch).<span class="apple-converted-space"> </span><br class=""> The returned value of " OF->getArch()" is decided by " EF.getHeader()->e_machine" but I found "e_machine" is defined somewhere in MCAssembler<o:p class=""></o:p></span></div></div></div></blockquote><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">I haven’t double-checked, but I thought this definition came from llvm/Support/ELF.h?<o:p class=""></o:p></span></div></div></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""><br class=""><br class=""><br class=""><o:p class=""></o:p></span></div></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">(My compiler uses binutils as assembler) . Although I make some hacks to pass this checking, I still get other errors. So my problem is whether llvm-cov has to work with MCAssembler and is it possible to do it with binutils?<o:p class=""></o:p></span></div></div></div></blockquote><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">Coverage support should be / is largely compatible with binutils, but you may have to watch out for this BFD bug: </span><a href="https://clang.llvm.org/docs/SourceBasedCodeCoverage.html#drawbacks-and-limitations" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">https://clang.llvm.org/docs/SourceBasedCodeCoverage.html#drawbacks-and-limitations</span></a><span style="color: white;" class=""><o:p class=""></o:p></span></div></div></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">What is the error you see?<o:p class=""></o:p></span></div></div></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></div><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">vedant <o:p class=""></o:p></span></div></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""><br class=""><br class=""><br class=""><o:p class=""></o:p></span></div></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""><br class="">Best,<br class="">Ruobin<br class=""><br class=""><br class=""><br class=""><o:p class=""></o:p></span></div></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">-----</span><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">邮件原件</span><span style="color: white;" class="">-----<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">发件人</span><span style="color: white;" class="">:<span class="apple-converted-space"> </span></span><a href="mailto:vsk@apple.com" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">vsk@apple.com</span></a><span class="apple-converted-space"><span style="color: white;" class=""> </span></span><span style="color: white;" class="">[</span><a href="mailto:vsk@apple.com" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">mailto:vsk@apple.com</span></a><span style="color: white;" class="">]<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">发送时间</span><span style="color: white;" class="">: 2019</span><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">年</span><span style="color: white;" class="">1</span><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">月</span><span style="color: white;" class="">23</span><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">日</span><span class="apple-converted-space"><span style="color: white;" class=""> </span></span><span style="color: white;" class="">1:24<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">收件人</span><span style="color: white;" class="">: xuruobin <</span><a href="mailto:xuruobin@huawei.com" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">xuruobin@huawei.com</span></a><span style="color: white;" class="">><o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">抄送</span><span style="color: white;" class="">:<span class="apple-converted-space"> </span></span><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">llvm-dev@lists.llvm.org</span></a><span style="color: white;" class="">; Yuchao (Michael)<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""><</span><a href="mailto:michael.yuchao@huawei.com" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">michael.yuchao@huawei.com</span></a><span style="color: white;" class="">><o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span lang="ZH-CN" style="font-family: 宋体; color: white;" class="">主题</span><span style="color: white;" class="">: Re: [llvm-dev] How to add new arch for llvm-cov show?<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">Hi Ruobin,<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">On Jan 21, 2019, at 5:21 PM, xuruobin via llvm-dev <</span><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">llvm-dev@lists.llvm.org</span></a><span style="color: white;" class="">><o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">wrote:<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">Hi all,<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">I'm trying to support llvm-cov for a new architecture and I have successfully<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">built compiler-rt for my arch. Following steps shown in<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><a href="https://clang.llvm.org/docs/SourceBasedCodeCoverage.html" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">https://clang.llvm.org/docs/SourceBasedCodeCoverage.html</span></a><span class="apple-converted-space"><span style="color: white;" class=""> </span></span><span style="color: white;" class="">, I encountered<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">an error for the last step(step of llvm-cov show).<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">The command line was (supposed my arch is XXXX)<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">"llvm-cov show -arch=XXXX ./foo -instr-profile=foo.profdata"<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">and the error was<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">"Failed to load coverage: No object file for requested architecture."<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">I think I should add my arch information to somewhere(maybe an llvm-cov<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">support list?) but I don't know where to add these information. Can<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">someone give me some suggestions?<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">You’ll need to teach libObject about this architecture. Specifically, the<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">coverage reader checks that calling getArch() on a loaded ObjectFile matches<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">Triple(Arch).getArch() (see loadBinaryFormat in<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">CoverageMappingReader.cpp).<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">best,<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">vedant<o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class=""> <o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">Best Regards,<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">Ruobin.<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">_______________________________________________<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><span style="color: white;" class="">LLVM Developers mailing list<o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><a href="mailto:llvm-dev@lists.llvm.org" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">llvm-dev@lists.llvm.org</span></a><span style="color: white;" class=""><o:p class=""></o:p></span></div></div></blockquote></blockquote><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: "Times New Roman", serif;" class=""><a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" style="color: purple; text-decoration: underline;" class=""><span style="color: purple;" class="">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</span></a><span style="color: white;" class=""><o:p class=""></o:p></span></div></div></blockquote></blockquote></div></blockquote></div></div></blockquote></div><div style="margin: 0cm 0cm 0.0001pt; 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