Initialize a backtrace accessor
The backtrace library is an unsupported feature, due to its fragility. For more information, see Backtraces in the QNX Neutrino technotes. |
#include <backtrace.h> int bt_init_accessor( bt_accessor_t *acc, bt_acc_type_t type, ...);
Additional arguments are required for BT_THREAD and BT_PROCESS, as described below.
libbacktrace
Use the -l backtrace option to qcc to link against this library.
The bt_init_accessor() function initializes the accessor with the identity of the thread to backtrace:
bt_init_accessor(bt_accessor_t *acc, BT_SELF);
bt_init_accessor(bt_accessor_t *acc, BT_THREAD, pthread_t tid);
bt_init_accessor(bt_accessor_t *acc, BT_PROCESS, pid_t pid, pthread_t tid)
The bt_acc_self global variable is a preinitialized accessor used to backtrace the current thread. Don't call bt_init_accessor() or bt_release_accessor() for this variable. |
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |
bt_get_backtrace(), bt_load_memmap(), bt_release_accessor(), bt_set_flags(), bt_sprn_memmap(), bt_sprnf_addrs(), bt_translate_addrs(), bt_unload_memmap()
Backtraces in the QNX Neutrino technotes
pidin backtrace in the Utilities Reference