I am running Ubuntu Mate Xenial and gdb always reports the following bt, symbols or not: ``` Program received signal SIGSEGV, Segmentation fault. 0x76fd9822 in ?? () from /lib/ld-linux-armhf.so.3 (gdb) bt #0 0x76fd9822 in ?? () from /lib/ld-linux-armhf.so.3 #1 0x76fd983a in ?? () from /lib/ld-linux-armhf.so.3 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Is this related? ```
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gdb in Ubuntu. https://bugs.launchpad.net/bugs/1325503 Title: gdb reports 'corrupt stack' on armhf without symbols Status in Linaro GDB: New Status in gdb package in Ubuntu: Triaged Bug description: [Test Case] sleep 120 & kill -SEGV %1 Observe a corrupt stack in the generated crash file. Original Report --------------- On armhf crash files fail to retrace and gdb reports 'corrupt stack' errors For example bug 1323241 Thread 1 (Thread 0xb0b3b450 (LWP 2243)): #0 0x00000030 in ?? () No symbol table info available. #1 0xa9990cbe in ?? () from /usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/Launcher/libUnityLauncher-qml.so No symbol table info available. Backtrace stopped: previous frame identical to this frame (corrupt stack?) I also tried directly on the device to run an unstripped and stripped build of cat and gdb fails to unwind the stack when the binary is stripped. The result of this test is: == unstripped == Reading symbols from ./cat...done. (gdb) run Starting program: /home/phablet/tmp/coreutils-8.21/src/cat ^C Program received signal SIGINT, Interrupt. 0xb6f6e914 in read () from /lib/arm-linux-gnueabihf/libc.so.6 (gdb) bt #0 0xb6f6e914 in read () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0x0000b648 in read (__nbytes=65536, __buf=0x19000, __fd=0) at /usr/include/arm-linux-gnueabihf/bits/unistd.h:44 #2 safe_read (fd=0, buf=buf@entry=0x19000, count=count@entry=65536) at lib/safe-read.c:66 #3 0x00009ace in simple_cat (bufsize=65536, buf=0x19000 "") at src/cat.c:168 #4 main (argc=1, argv=<optimized out>) at src/cat.c:730 (gdb) quit == stripped == Reading symbols from ./cat...(no debugging symbols found)...done. (gdb) run Starting program: /home/phablet/tmp/coreutils-8.21/src/cat ^C Program received signal SIGINT, Interrupt. 0xb6f6e914 in read () from /lib/arm-linux-gnueabihf/libc.so.6 (gdb) bt #0 0xb6f6e914 in read () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0x0000b648 in ?? () Backtrace stopped: previous frame identical to this frame (corrupt stack?) I'd expect the same number of frames and addresses when the binary is stripped or not with '??' instead of names when it is stripped. ProblemType: BugDistroRelease: Ubuntu 14.10 Package: gdb (not installed) Uname: Linux 3.4.0-5-mako armv7l ApportVersion: 2.14.3-0ubuntu1 Architecture: armhf Date: Mon Jun 2 11:07:07 2014 InstallationDate: Installed on 2014-06-02 (0 days ago) InstallationMedia: Ubuntu Utopic Unicorn (development branch) - armhf (20140602)SourcePackage: gdb UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gdb-linaro/+bug/1325503/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
