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<p class="MsoNormal"><span lang="FR-CA" style="mso-fareast-language:EN-US">Hello Tomar,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">If you look carefully at the invoked -cc1 command-line, there’s a flag
<span style="background:yellow;mso-highlight:yellow">-disable-free</span> which is always passed:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">$ clang-cl /c a.cpp -###<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA" style="mso-fareast-language:EN-US">clang version 12.0.0 (https://github.com/llvm/llvm-project.git 0eab9d5823815c6520697f8d725c402c88e5d050)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Target: x86_64-pc-windows-msvc<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Thread model: posix<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">InstalledDir: F:\llvm-project\__test\..\buildninjaRpMalloc2\bin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">(in-process)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">"F:\\llvm-project\\buildninjaRpMalloc2\\bin\\clang-cl.exe" "-cc1" "-triple" "x86_64-pc-windows-msvc19.28.29334" "-emit-obj" "-mrelax-all" "-mincremental-linker-compatible" "--mrelax-relocations"
<span style="background:yellow;mso-highlight:yellow">"-disable-free"</span> "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "a.cpp" "-mrelocation-model" "pic" "-pic-level" "2" "-mframe-pointer=none" "-relaxed-aliasing" "-fmath-errno" "-fno-rounding-math"
"-mconstructor-aliases" "-munwind-tables" "-target-cpu" "x86-64" "-mllvm" "-x86-asm-syntax=intel" "-tune-cpu" "generic" "-D_MT" "-flto-visibility-public-std" "--dependent-lib=libcmt" "--dependent-lib=oldnames" "-stack-protector" "2" "-fms-volatile" "-fdiagnostics-format"
"msvc" "-resource-dir" "F:\\llvm-project\\buildninjaRpMalloc2\\lib\\clang\\12.0.0" "-internal-isystem" "F:\\llvm-project\\buildninjaRpMalloc2\\lib\\clang\\12.0.0\\include" "-internal-isystem" "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Professional\\VC\\Tools\\MSVC\\14.28.29333\\ATLMFC\\include"
"-internal-isystem" "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Professional\\VC\\Tools\\MSVC\\14.28.29333\\include" "-internal-isystem" "C:\\Program Files (x86)\\Windows Kits\\NETFXSDK\\4.8\\include\\um" "-internal-isystem" "C:\\Program Files
(x86)\\Windows Kits\\10\\include\\10.0.18362.0\\ucrt" "-internal-isystem" "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\shared" "-internal-isystem" "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\um" "-internal-isystem"
"C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\winrt" "-internal-isystem" "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\cppwinrt" "-fdeprecated-macro" "-fdebug-compilation-dir" "F:\\llvm-project\\__test" "-ferror-limit"
"19" "-fmessage-length=120" "-fno-use-cxa-atexit" "-fms-extensions" "-fms-compatibility" "-fms-compatibility-version=19.28.29334" "-std=c++14" "-fdelayed-template-parsing" "-fcolor-diagnostics" "-faddrsig" "-o" "a.obj" "-x" "c++" "a.cpp"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">The purpose of the flag is to speed-up the process shutdown, by disabling heap deallocations on exit. It is used in conjunction with llvm::BuryPointer</span><span style="font-size:9.0pt;font-family:"Segoe UI",sans-serif;color:black">.
</span><span style="mso-fareast-language:EN-US">Unless you call the -cc1 command directly or use libTooling, this flag is always active.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Alex.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="FR">De :</span></b><span lang="FR"> llvm-dev <llvm-dev-bounces@lists.llvm.org>
<b>De la part de</b> Tomar, Sourabh Singh via llvm-dev<br>
<b>Envoyé :</b> November 23, 2020 8:43 AM<br>
<b>À :</b> llvm-dev@lists.llvm.org<br>
<b>Objet :</b> [llvm-dev] Possible Memory leak while compiling.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">When compiling a .ll file as:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">$ valgrind clang main.ll<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I noticed lot of memory leaks:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== HEAP SUMMARY:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== in use at exit: 647,329 bytes in 619 blocks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== total heap usage: 6,754 allocs, 6,135 frees, 1,571,191 bytes allocated<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396==<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== LEAK SUMMARY:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== definitely lost: 69,392 bytes in 4 blocks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== indirectly lost: 374,050 bytes in 595 blocks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== possibly lost: 12,207 bytes in 8 blocks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== still reachable: 191,680 bytes in 12 blocks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">==18396== suppressed: 0 bytes in 0 blocks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is this okay ? or Known issue ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Sourabh.<o:p></o:p></span></p>
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