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libspl/assert: dump backtrace in assert

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Adds a check for the backtrace() function. If available, uses it to show
a stack backtrace in the assertion output.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #16140
This commit is contained in:
Rob Norris
2024-04-27 21:35:05 +10:00
committed by Brian Behlendorf
parent dec697ad68
commit 2152c405ba
4 changed files with 37 additions and 0 deletions
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config/user-backtrace.m4
+14
View File
@@ -0,0 +1,14 @@
dnl
dnl backtrace(), for userspace assertions. glibc has this directly in libc.
dnl FreeBSD and (sometimes) musl have it in a separate -lexecinfo. It's assumed
dnl that this will also get the companion function backtrace_symbols().
dnl
AC_DEFUN([ZFS_AC_CONFIG_USER_BACKTRACE], [
AX_SAVE_FLAGS
LIBS=""
AC_SEARCH_LIBS([backtrace], [execinfo], [
AC_DEFINE(HAVE_BACKTRACE, 1, [backtrace() is available])
AC_SUBST([BACKTRACE_LIBS], ["$LIBS"])
])
AX_RESTORE_FLAGS
])
config/user.m4
+1
View File
@@ -26,6 +26,7 @@ AC_DEFUN([ZFS_AC_CONFIG_USER], [
ZFS_AC_CONFIG_USER_AIO_H
ZFS_AC_CONFIG_USER_CLOCK_GETTIME
ZFS_AC_CONFIG_USER_PAM
ZFS_AC_CONFIG_USER_BACKTRACE
ZFS_AC_CONFIG_USER_RUNSTATEDIR
ZFS_AC_CONFIG_USER_MAKEDEV_IN_SYSMACROS
ZFS_AC_CONFIG_USER_MAKEDEV_IN_MKDEV