On Fri, Jan 6, 2023 at 5:28 PM mariappan balraj <mariappan.bal...@gmail.com> wrote: > > I am not expecting GO stack. I am interested only in getting C stack. If I > want go stack, I can use delve debugger to get it. From GO, using CGO, > test3() is called which is calling test2() which is calling test1(). I am > expecting only C stack which contains test3(), test2(), test1(). In this > particular case assigning value by using pointer variable which contains > NULL(segmentation fault). I am seeing only test1(). After that it is not > stack and saying stack corruption. I strongly believe that you can help on > this. Please help.
I put your program in foo.go. Then I did: > CGO_CFLAGS=-g go build foo.go > gdb ./foo GNU gdb (Debian 12.1-3) 12.1 Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ./foo... warning: File "/home/iant/go/src/runtime/runtime-gdb.py" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". To enable execution of this file add add-auto-load-safe-path /home/iant/go/src/runtime/runtime-gdb.py line to your configuration file "/home/iant/.config/gdb/gdbinit". To completely disable this security protection add set auto-load safe-path / line to your configuration file "/home/iant/.config/gdb/gdbinit". For more information about this security protection see the --Type <RET> for more, q to quit, c to continue without paging-- "Auto-loading safe path" section in the GDB manual. E.g., run from the shell: info "(gdb)Auto-loading safe path" (gdb) r Starting program: /tmp/x/foo [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7fffd09ea640 (LWP 650585)] [New Thread 0x7fffcbfff640 (LWP 650586)] [New Thread 0x7fffcb7fe640 (LWP 650587)] [New Thread 0x7fffcaffd640 (LWP 650588)] [New Thread 0x7fffca7fc640 (LWP 650589)] Thread 1 "foo" received signal SIGSEGV, Segmentation fault. 0x000000000045b01a in test1 () at /home/iant/foo.go:6 6 *p = 30; (gdb) where #0 0x000000000045b01a in test1 () at /home/iant/foo.go:6 #1 0x000000000045b02c in test2 () at /home/iant/foo.go:10 #2 0x000000000045b038 in test3 () at /home/iant/foo.go:14 #3 0x000000000045b054 in _cgo_3060c004c901_Cfunc_test3 (v=0xc000064f70) at /tmp/go-build/cgo-gcc-prolog:49 #4 0x0000000000456c64 in runtime.asmcgocall () at /home/iant/go/src/runtime/asm_amd64.s:848 #5 0x00000000004e3460 in ?? () #6 0x0000000000000001 in ?? () #7 0x000000c000080500 in ?? () #8 0x00007fffffffe458 in ?? () #9 0x0000000000439225 in runtime.malg.func1 () at /home/iant/go/src/runtime/proc.go:4227 #10 0x0000000000456aa9 in runtime.systemstack () at /home/iant/go/src/runtime/asm_amd64.s:496 #11 0x00000000004596a5 in runtime.newproc (fn=0x1) at <autogenerated>:1 #12 0x00000000004cc720 in runtime[scavenger] () #13 0x0000000000000001 in ?? () #14 0x00000000004569a5 in runtime.mstart () at /home/iant/go/src/runtime/asm_amd64.s:394 #15 0x000000000045692f in runtime.rt0_go () at /home/iant/go/src/runtime/asm_amd64.s:358 #16 0x0000000000000001 in ?? () --Type <RET> for more, q to quit, c to continue without paging--q Quit So when I try it, I do see the full C stack at the point where the signal occurs. In your backtrace earlier you are trying to see the stack after the signal is already being handled by the Go signal handler. I don't know why that would work. Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAOyqgcWVnx%3DgtKx9%2BwQ%3D%2B3RW78yg-EA922CD1Sf6B_9vCG9HaQ%40mail.gmail.com.
