Christopher Collins created MYNEWT-708:
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Summary: Lock scheduler during init
Key: MYNEWT-708
URL: https://issues.apache.org/jira/browse/MYNEWT-708
Project: Mynewt
Issue Type: Bug
Reporter: Christopher Collins
Fix For: v1_1_0_rel
Now that main() runs after the OS is started, tasks may preempt the main task
as soon as they are created. If such a task expects all packages to have been
initialized, then a crash or other unpredictable behavior will occur.
Here is an example crash that happens when the BLE link layer task runs before
the host package is fully initialized:
{noformat}
Program received signal SIGTRAP, Trace/breakpoint trap.
__assert_func (file=<optimized out>, line=<optimized out>, func=<optimized
out>, e=<optimized out>) at kernel/os/src/arch/cortex_m4/os_fault.c:137
137 asm("bkpt");
(gdb) whe
#0 __assert_func (file=<optimized out>, line=<optimized out>, func=<optimized
out>, e=<optimized out>) at kernel/os/src/arch/cortex_m4/os_fault.c:137
#1 0x00019f2e in ble_hci_trans_ll_evt_tx (hci_ev=<optimized out>) at
net/nimble/transport/ram/src/ble_hci_ram.c:91
#2 0x0000ea5e in ble_ll_hci_send_noop () at
net/nimble/controller/src/ble_ll_hci.c:106
#3 0x0000a438 in ble_ll_task (arg=<optimized out>) at
net/nimble/controller/src/ble_ll.c:1008
#4 0x00000000 in ?? ()
(gdb)
#0 __assert_func (file=<optimized out>, line=<optimized out>, func=<optimized
out>, e=<optimized out>) at kernel/os/src/arch/cortex_m4/os_fault.c:137
#1 0x00019f2e in ble_hci_trans_ll_evt_tx (hci_ev=<optimized out>) at
net/nimble/transport/ram/src/ble_hci_ram.c:91
#2 0x0000ea5e in ble_ll_hci_send_noop () at
net/nimble/controller/src/ble_ll_hci.c:106
#3 0x0000a438 in ble_ll_task (arg=<optimized out>) at
net/nimble/controller/src/ble_ll.c:1008
#4 0x00000000 in ?? ()
{noformat}
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