14672 2021-12-30 16:35:25 +0000 ThreadSanitizer (-fsanitize=thread) segfault before reaching main() 2022-04-12 00:33:24 +0000 1 1 7 Build System, Metadata & Runtime OE-Core devtools / tool chain 3.4.1 x86 x86_64 RESOLVED FIXED Medium+ normal 4.0 M4 1 tonyb randy.macleod meta.mr.watcher meta.watcher raj.khem randy.macleod sundeep.kokkonda --- --- No (bug/feature does not impact docs) oldest_to_newest 92215 0 4847 tonyb 2021-12-30 16:35:25 +0000 Created attachment 4847 Trivial test program that segfaults before reaching main Since Yocto 3.4, any C program that is compiled with -fsanitize=thread segfaults in libtsan before it even gets to main(). Even the trivial program: int main(int argc, char **argv){return 0;} Kernel dmesg output: tsan-test[10113]: segfault at 600000000008 ip 00007f386a5bbb7f sp 00007fffa57e2900 error 6 in libtsan.so.0.0.0[7f386a543000+b4000] Code: f7 c2 ff 1f 00 00 0f 84 7f 00 00 00 48 c1 e8 32 25 ff 1f 00 00 48 69 c0 00 00 13 01 48 8d 14 d0 48 b8 00 00 00 00 00 60 00 00 <48> c7 04 02 00 00 00 00 8b 43 1c 85 c0 75 3d 8b 93 70 02 00 00 48 I have attached a recipe with the test program to reproduce the problem. ThreadSanitizer worked in Yocto 3.3.3 with gcc 10.2. It broke when we upgraded to Yocto 3.4.1 with gcc 11.2. I also tested poky master and master-next on 2021-12-30; they also fail. Note that AddressSanitizer and UndefinedBehaviorSanitizer seem to be working OK so far in Yocto 3.4.1. It is just ThreadSanitizer that is not working. 92224 1 randy.macleod 2022-01-06 15:34:54 +0000 We should add a test case. 92751 2 sundeep.kokkonda 2022-03-10 09:04:36 +0000 The issue is in the 'GetAltStackSize' function from below file. ..\libsanitizer\sanitizer_common\sanitizer_posix_libcdep.cpp This function calls recursively and causing the SIGSEGV fault. The fix for this issue is available in below patch. https://gcc.gnu.org/git/?p=gcc.git;a=blobdiff;f=libsanitizer/sanitizer_common/sanitizer_posix_libcdep.cpp;h=ddf6844bed13efeb3f7f87aee664b6b96682a8f6;hp=d1d8e509c4dbaa2cb1a0d020959765c20fa7a895;hb=90e46074e6b3561ae7d8ebd205127f286cc0c6b6;hpb=8bf5b49ebd2176b8c535147377381dd07fbdd643 This change is not yet included in the current released version of GCC. Updating to next GCC version (GCC-11.3, yet to be released) will fix the issue. 92769 3 sundeep.kokkonda 2022-03-11 09:15:39 +0000 The next GCC release is not near so the patch is backported and submitted to upstream. Below are the details. https://lists.openembedded.org/g/openembedded-core/message/163047 92997 4 randy.macleod 2022-04-12 00:33:24 +0000 https://git.openembedded.org/openembedded-core/commit/?id=c44c4e7fb3c860d9fcb2aada0c9d4acb1e1e8101 4847 2021-12-30 16:35:25 +0000 2021-12-30 16:35:25 +0000 Trivial test program that segfaults before reaching main tsan-test.tar.gz application/gzip 1508 tonyb H4sIAAAAAAAAA+1ZbW/aSBDu1+6vGKF8SCoI5r1HL1IdbIIVYyPbNM0nZOwF9mq8yF6S5qL895s1 hpCobe7UJj21HkXCO2/Pzs6Md9cRqR9XBE1F9dWzkYLUabWyX6THv9lzrVlrK51as96qIb/Tbnde Qev5pnRP61T4CcBLQP0fSezyP2MRTZ+lCrL8d/5V/uvNWuOVUkP1WpH/l6DH+RfP8D74D/lv1dtN zH+9U68X+X8J+nr+TaOnW65+PDS878SQCW7LvH45//Wm0sb8K51Go9Oo19uY/2ajjflXfkiET9Bv nv8RTZYsTRmPgaWwoAmd3sA88WNBwzLMEkqBzyBY+MmclkFw8OMbWNEkRQM+FT6LWTwHHwK+uiGo KRboJuUzce0nFJVD8NOUB8xHfxDyYL2ksfCFxMsKDg7FgkLJzS1KRxlISP2IsBikbCuCayYWfC0g wepMWCB9lIHFQbQO5Ry24ogtWY4gzRM2X4iUoNN1ihHIeZZhyUM2k780C2u1nkYsXZQhZNL1dC2Q mUpmQGNphXFUeQIpjSKCHhjOO4v1fnaZjpz6Si6oyJcolZzrBV8+jISlZLZOYoSkmU3IcckyxL9o ICRHqs94FPFrGVrA45DJiNIuIR6K/Cm/olksWXgQc4FT3UxBJmB1n9VclC78KIIpzRcMcVlMJGsb TiLhsRdiwfwIVjzJ8B6HeYz4Ax1cu+9dqI4Ohgsjx/5gaLoGJdXFcakMF4Y3sMceoIajWt4l2H1Q rUs4NyytDPrHkaO7LtgOMYYj09CRZ1g9c6wZ1hmcop1le2Aa+N5Bp54NEjB3ZeiudDbUnd4Ah+qp YRreZZn0Dc+SPvu2AyqMVMczemNTdWA0dka2qyO8hm4tw+o7iKIPdcs7RlTkgf4BB+AOVNOUUEQd 4+wdOT/o2aNLxzgbeDCwTU1H5qmOM1NPTX0DhUH1TNUYlkFTh+qZnlnZ6MUhUm0zO7gY6JIl8VT8 63mGbckwerblOTgsY5SOtzO9MFy9DKpjuHJB+o49LBO5nGhhZ07QztI3XuRSw4OMoIocj1195xA0 XTXRlyuNZYhbZcymxQXtEgPr64qFa8z8piux4mRvP6pD4c+xbFJB/XBbGLM11lDeJyDoZ4E+Ackd aR8r5oZfMUJsejZjNOkCplXWMBYpjf2pxFr6wYLFFFYJDygWLQKh861PFs94stz089RPsXDzxpYI JEeAewRsuYUvQLaZfJuBf+WzSAJ1YSHEqlutpqvw8zFP5tUcIq2Sn/0W/nn09f1/6H+ikvf9GE/s /0pTaT06/+H+Xyv2/5egY003dU+f2NZEdxzbwQ3meLXg8U0Xgoj6MSG7iujC7vE4IK/f02DBodTr deHgsNc7Kt2z+qZ65mbs7GlPZGo7Wf6YCTMHUKlcYf9io+fq5PWGv/OzZwWVWcwrHLfayizxl7Sy 4gzPLAnycZK4Wf5NT8QikW+qCj94Dwd/EpIF1EXnyRLV7qP5jdv/G/2/l+zvxHiq/5VWY3f/b2Hj K7WWojSK/n8JwqbBDZjFh/IBD/lBOTvsw5s3OLg6uk2owJMqKO/ufucu+XXpS/0+nf5YjCf6v6bU Gg+//9bqtVrR/y9C7ng4VJ1LOIGSLAC84s5n/jrCSyhWQonkH4GkGA/u2XjSN0zdnfQG52grBXLj wGP13veid8uwdaI0lGDaaIR1f9b8IwjoNPA7zVBpvX07fdv067UScZ3eZOwYez52NVgiGUr34HZk 3UmF6jpNqlMW76u4UnBwe2E755rh3O2LNH2kW1qmMA+CyvZIkKQl4uSye98Rm0rTEiF4mEnoUt6t M0JZRZvgTc8z+pcT1x47Pf2kXvqS2gzLKPhUwTuMwCs8TyqpSHg8xxXLTzy5wTd1ScgnAV+ucDEO j+A2u0hxOknW8RIP4+QuU5AXMLy47xSWn0KGx54VHNxqd9tlyiS5JlSWIP//ggru3iI90K+S4v1e UEEFFVRQQQUVVFBBBRX0S9M/58+4IQAoAAA=