<div dir="ltr">If anyone's working on this I'd suggest adding a test case for the "split code" case as well (where even a single function is split into multiple ranges). MSVC with PGO should help produce hot/cold cold split repros.</div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 31, 2018 at 10:24 AM, Greg Clayton via lldb-commits <span dir="ltr"><<a href="mailto:lldb-commits@lists.llvm.org" target="_blank">lldb-commits@lists.llvm.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space"><br><div><span class=""><br><blockquote type="cite"><div>On May 31, 2018, at 2:31 AM, Aleksandr Urakov via lldb-commits <<a href="mailto:lldb-commits@lists.llvm.org" target="_blank">lldb-commits@lists.llvm.org</a>> wrote:</div><br class="m_-4854029087832265893Apple-interchange-newline"><div><div dir="ltr">

<div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)">Hello!</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)">I'm Aleksandr from JetBrains. We are working on improving support of MSVC-compiled binaries in lldb. We have made several fixes and would like to upstream them.</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)">The first patch adds support of function-level linking feature. The SymbolFilePDB::ParseCompileUni<wbr>tLineTable function relies on the fact that ranges of compiled source files in the binary are continuous and don't intersect with each other. ParseCompileUnitLineTable creates LineSequence for each file and inserts it into LineTable, and the implementation of LineTable relies on continuity of the sequence. But it's not always true when function-level linking is enabled, e.g. in the attached input test file test-pdb-function-level-linkin<wbr>g.exe there is xstring's std__basic_string_char_std__ch<wbr>ar_traits_char__std__allocator<wbr>_char_____max_size (.00454820) between test-pdb-function-level-linkin<wbr>g.cpp's foo (.00454770) and main (.004548F0). The source is compiled with Microsoft C/C++ compiler version 19.14.26429.4 for x86.</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)">To fix the problem we propose to renew the sequence on each address gap.</div></div></div></blockquote><div><br></div></span>That is what DWARF does as well. A line table can have many sequences where each sequence is a vector of rows whose addresses must always increase or stay the same. The line tables we have in LLDB mimic the DWARF line tables in many ways.</div><div><br></div><div><br><blockquote type="cite"><div><span class=""><div dir="ltr"><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;background-color:rgb(255,255,255)">The link to the patch and related files is: <span style="font-size:small"><a href="https://drive.google.com/open?id=1ozp06jyqugjLGT-6wuJKS1UhRuXFsixf" target="_blank">https://drive.google.com/<wbr>open?id=1ozp06jyqugjLGT-<wbr>6wuJKS1UhRuXFsixf</a></span></div><div><br></div><div>Thanks!</div><div><br></div>-- <br><div class="m_-4854029087832265893gmail_signature"><div dir="ltr"><div>Aleksandr Urakov</div><div><span>Software Developer</span></div><div><span>JetBrains</span></div><div><span><a href="http://www.jetbrains.com/" target="_blank">http://www.jetbrains.com</a></span></div><div><span>The Drive to Develop</span></div></div></div>
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