NAME¶
function::sprint_ubacktrace - Return stack back trace for current user-space
task as string.
SYNOPSIS¶
sprint_ubacktrace:string()
DESCRIPTION¶
Returns a simple backtrace for the current task. One line per address. Includes
the symbol name (or hex address if symbol couldn't be resolved) and module
name (if found). Includes the offset from the start of the function if found,
otherwise the offset will be added to the module (if found, between brackets).
Returns the backtrace as string (each line terminated by a newline character).
Note that the returned stack will be truncated to MAXSTRINGLEN, to print
fuller and richer stacks use print_ubacktrace. Equivalent to
sprint_ustack(ubacktrace), but more efficient (no need to translate
between hex strings and final backtrace string).
NOTE¶
To get (full) backtraces for user space applications and shared shared libraries
not mentioned in the current script run stap with -d /path/to/exe-or-so and/or
add --ldd to load all needed unwind data.
SEE ALSO0¶
tapset::ucontext-unwind(3stap)
