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Unlike CONFIG_HW_STACK_PROTECTION, which greatly helps expose stack overflows in test code, activating userspace without putting threads in user mode is of very limited value. Now CONFIG_TEST_USERSPACE is off by default. Any test which puts threads in user mode will need to set CONFIG_TEST_USERSPACE. This should greatly increase sanitycheck build times as there is non-trivial build time overhead to enabling this feature. This also allows some tests which failed the build on RAM-constrained platforms to compile properly. tests/drivers/build_all is a special case; it doesn't put threads in user mode, but we want to ensure all the syscall handlers compile properly. Fixes: #15103 (and probably others) Signed-off-by: Andrew Boie <andrew.p.boie@intel.com> |
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| .. | ||
| src | ||
| CMakeLists.txt | ||
| defaults.tc | ||
| prj.conf | ||
| README.txt | ||
| testcase.yaml | ||
Title: Stack Protection Support
Description:
This test verifies that stack canaries operate as expected.
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Building and Running Project:
This project outputs to the console. It can be built and executed
on QEMU as follows:
make run
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Troubleshooting:
Problems caused by out-dated project information can be addressed by
issuing one of the following commands then rebuilding the project:
make clean # discard results of previous builds
# but keep existing configuration info
or
make pristine # discard results of previous builds
# and restore pre-defined configuration info
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Sample Output:
tc_start() - Test Stack Protection Canary
Starts main
Starts alternate_thread
alternate_thread: Input string is too long and stack overflowed!
***** Stack Check Fail! *****
Current thread ID = 0x00103180
Faulting segment:address = 0xdead:0xdeaddead
eax: 0xdeaddead, ebx: 0xdeaddead, ecx: 0xdeaddead, edx: 0xdeaddead
esi: 0xdeaddead, edi: 0xdeaddead, ebp: 0deaddead, esp: 0xdeaddead
eflags: 0xdeaddead
Fatal fault in thread 0x00103180! Aborting.
main: Stack ok
main: Stack ok
main: Stack ok
main: Stack ok
main: Stack ok
main: Stack ok
===================================================================
PASS - main.
===================================================================
PROJECT EXECUTION SUCCESSFUL