Commit graph

70 commits

Author SHA1 Message Date
Stephen Warren
ac122efdb6 test/py: regenerate persistent GPT image if code changes
test_gpt generates a persistent disk image which can be re-used across
multiple test runs. Currently, if the Python code that generates the disk
image change, the image is not regenerated, which could cause test
failures e.g. if a test was updated to expect some new partition name or
size, yet the persistent disk image contained the old name or size. This
change introduces functionality to regenerate the disk image if the
instructions to generate the image have changed.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
2017-11-06 09:59:00 -05:00
Patrick Delaunay
3a2605fa87 cmd: gpt: solve issue for swap and rename command
don't use prettyprint_part_size() in create_gpt_partitions_list()
that avoid to align offset and size to 1 MiB and increase precision for
start and size.
This patch avoid the risk to change partition size and lost data during
rename or swap.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
2017-10-23 17:28:11 -04:00
Patrick Delaunay
0cf02ff612 test/py: gpt: test start LBA for sub-command rename and swap
Add test of first and last LBA in gpt for rename and swap.
Only the name is expected to change, so test 3 columns
for part command
1: first LBA (start)
2: last LBA (end)
3: partition name

After rename, the last LBA change and it is a error in current U-Boot code
+ "first" = 0x7ff : invalid value (<start)
+ "second" = 0x17ff => size increasing !

Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2017-10-23 17:28:08 -04:00
Patrick Delaunay
b61a3b5c8d test/py: gpt: add test for sub-command write
+ test write for one partition on all the device (size=0)
+ test write with disk uuid and 2 partitions

Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2017-10-23 17:27:58 -04:00
Patrick Delaunay
30ef7cbb81 test/py: gpt: add test for sub-command read and verify
add sandbox test for some gpt sub-command
- gpt read / part list : read the gpt partition created by sgdisk on host
  test start, size, LBA and name output
- gpt verify : verify the gpt partition create by sgdisk on host

PS: persistent data test_gpt_disk_image.bin are udpated

Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2017-10-23 17:27:42 -04:00
Patrick Delaunay
da4c4bbd61 test/py: gpt: copy persistent file
copy the persistent gpt binary file as it can be modified during the test
that avoid issue if the test fail: the test always restart with clean file

Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2017-10-23 17:27:05 -04:00
Heinrich Schuchardt
6c7c3dcc59 test/py/tests/test_sleep.py: test time approximately
On qemu errors like
assert 2.999650001525879 >= 3
occur.

According to the comment in the code the test is meant to be
approximate. So we should accept some milliseconds less.

Cc: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
2017-10-16 13:45:37 -04:00
Tom Rini
958046fc78 Patch queue for efi - 2017-10-01
Lots of new things this time. High level highlights are:
 
   - Shim support (to boot Fedora)
   - Initial set of unit tests
   - Preparations to support UEFI Shell
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Merge tag 'signed-efi-next' of git://github.com/agraf/u-boot

Patch queue for efi - 2017-10-01

Lots of new things this time. High level highlights are:

  - Shim support (to boot Fedora)
  - Initial set of unit tests
  - Preparations to support UEFI Shell
2017-10-01 08:48:38 -04:00
Stephen Warren
2d26bf6c26 test/py: add skip marker for reliance on tools
Some tests use external tools (executables) during their operation. Add
a test.py mark to indicate this. This allows those tests to be skipped if
the required tool is not present.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
2017-09-29 14:07:53 -04:00
Heinrich Schuchardt
38b1b79021 test/py: add a test calling the EFI selftest
A Python test script is provided that runs the EFI selftest
if CONFIG_CMD_EFI_SELFTEST=y.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-18 23:53:57 +02:00
Stephen Warren
110ba62519 test/py: gpt: make use of infra-structure
Make various changes to the GPT test:

1) Reference the disk image using an absolute path in all cases. This
allows test/py to operate correctly if it's run from a directory other
than the root of the U-Boot source tree.

2) Store the disk image in the teswt/py persistent data directory. This
removes the need to re-generate it every time the tests are run.

3) Execute sgdisk using u_boot_utils.run_and_log() so that its output is
captured in the test log. This allows debugging any problems running it.

4) Make the disk image a test fixture. This removes the requirement to
always run all GPT tests, and run them in order. The current code doesn't
create the disk image if e.g. just test_gpt_uuid() is executed via the
test.py -k command-line option.

5) Use @pytest.mark.buildconfigspec for all feature dependencies, rather
than manually implementing some of them.

6) Make all tests depend on sandbox, since they use the sandbox-specific
host command.

Fixes: a2f422555f ("add pytests for 'gpt guid' command in sandbox")
Fixes: c5772188ed ("add pytests for 'gpt rename' and 'gpt swap'")
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Tom Rini <trini@konsulko.com>
2017-09-15 22:33:41 -04:00
Alison Chaiken
c5772188ed add pytests for 'gpt rename' and 'gpt swap'
Add unit tests for the 'gpt rename' and 'gpt swap' commands that
rely on the block device created by test/py/make_test_disk.py.
Add CONFIG_CMD_GPT_RENAME to the sandbox_defconfig.  Remove the
testdisk.raw test device at the end of the tests.

Signed-off-by: Alison Chaiken <alison@peloton-tech.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-09-14 21:32:59 -04:00
Alison Chaiken
a2f422555f add pytests for 'gpt guid' command in sandbox
Run unit tests for the 'gpt guid' command, making use of the block
device created by test/py/make_test_disk.py.  Remove this device at
the end of the tests.

Signed-off-by: Alison Chaiken <alison@peloton-tech.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-09-14 21:32:57 -04:00
Simon Glass
3a37aee30f test: Move the FIT test into the correct place
Move this test so that it will run when 'make tests' is used.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-08-13 15:17:36 -04:00
Tom Rini
845e10d165 tests: test_dfu.py: Add example udev rule for host_usb_dev_node
If one does not already have a rule to create a custom device node when
a given device enumerates it can be useful to have udev create a
bus path based node to the entry in /dev/bus/usb that was just
enumerated.  Given that DFU itself does not require a /dev entry it is a
good idea to provide a rule that will generate one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2017-07-22 15:36:16 -04:00
Simon Glass
2028cc59f7 sandbox: Stop printing platdata at the start of SPL
Currently we have code which prints out platform data at the start of SPL.
Now that we have tests for dtoc this is probably not necessary. Drop it.
Update test_ofplatdata to check for empty output since it is useful to
check that sandbox_spl works as expected.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-07-11 10:08:20 -06:00
Michal Simek
5bdb317065 test: py: hush: Add echo dependency
Some tests depends on echo command to be present.

Reported-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2017-06-05 14:13:02 -04:00
Michal Simek
a5b548138b test: py: Use global pytestmark for hush tests
All tests in test_hush_if_test depends on hush parser to be
present. This patch simplify test dependencies by using global
pytestmark.

Reported-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
2017-06-05 14:13:02 -04:00
Michal Simek
6b83c38d7a test: py: Add cmd_echo dependency
There is missing dependency on echo command. Mark tests which requires
echo.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
2017-05-22 07:29:55 -04:00
Alexander Graf
0e4e38ae38 travis: Add efi_loader grub2 test
We have all the building blocks now to run arbitrary efi applications
in travis. The most important one out there is grub2, so let's add
a simple test to verify that grub2 still comes up.

Signed-off-by: Alexander Graf <agraf@suse.de>
2016-11-27 09:53:40 -05:00
Alexander Graf
95b62b2e28 efi_loader: Allow to compile helloworld.efi w/o bundling it
Today we can compile a self-contained hello world efi test binary that
allows us to quickly verify whether the EFI loader framwork works.

We can use that binary outside of the self-contained test case though,
by providing it to a to-be-tested system via tftp.

This patch separates compilation of the helloworld.efi file from
including it in the u-boot binary for "bootefi hello". It also modifies
the efi_loader test case to enable travis to pick up the compiled file.
Because we're now no longer bloating the resulting u-boot binary, we
can enable compilation always, giving us good travis test coverage.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-11-27 09:53:39 -05:00
Alexander Graf
4ca4b265ad tests: Add efi_loader hello world test
Now that we have working network tests and a hello world efi application
built inside our tree, we can automatically test that efi binary running
inside of U-Boot.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-11-26 15:50:53 -05:00
Alexander Graf
1bce3ad5f3 tests: net: Offset downloads to 4MB
The network test currently downloads files at 0MB offset of RAM start.
This works for most ARM systems, but x86 has weird memory layout constraints
on the first MB of RAM.

To not get caught into any of these, let's add a 4MB pad from start
of RAM to the default memory offset.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-11-26 15:50:52 -05:00
Tom Rini
2b2c6e51e7 test/py/tests/test_sleep.py: Add check for CONFIG_CMD_MISC
We can only run this command if the sleep command is enabled and that
depends on CONFIG_CMD_MISC

Signed-off-by: Tom Rini <trini@konsulko.com>
2016-10-14 19:12:31 -04:00
Guillaume GARDET
6a2981a713 test: add NFS download test
Add a NFS download test, based on TFTP test.
Tested on i.MX6 SabreLite board.

Signed-off-by: Guillaume GARDET <guillaume.gardet@free.fr>

Cc: Tom Rini <trini@konsulko.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
2016-10-13 12:25:36 -05:00
Tom Rini
de4be9ec17 test/py/tests/test_vboot.py: Add check that we boot the image
Make sure that when we're telling bootm to boot an image, and we expect
the image to boot we get the output from sandbox that we attempted to
run Linux and that U-Boot completed its job.

Cc: Simon Glass <sjg@chromium.org>
Cc: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
2016-09-22 11:34:58 -04:00
Simon Glass
f6d34651d8 test: Adjust run_command_list() to return a list of strings
Return one string for each command that was executed. This seems cleaner.

Suggested-by: Teddy Reed <teddy.reed@gmail.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
2016-08-05 20:55:23 -04:00
Simon Glass
27c087d58a test: Add a function to restart U-Boot
Add a proper function for this rather than using internal functions. Use it
in the single call site.

Also, do a restart at the end of the vboot test to reset to the normal
device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Stephen Warren <swarren@nvidia.com>
2016-08-05 20:55:22 -04:00
Simon Glass
851271a71a test: vboot: Put each test variant in its own section
Use 'cons.log.section' feature to split up the test output. This makes it
easier to read.

Suggested-by: Stephen Warren <swarren@nvidia.com>

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-08-05 20:55:22 -04:00
Simon Glass
ac9a23cffc test: Rename sha to sha_algo and pass it around
Rename this argument and pass it to each function that needs it, instead of
making it global.

Suggested-by: Stephen Warren <swarren@nvidia.com>
Suggested-by: Teddy Reed <teddy.reed@gmail.com>

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-08-05 20:55:21 -04:00
Simon Glass
ec70f8a911 test: Drop the cmd() function
Instead of this, use the existing run_and_log() function, enhanced to
support a command string as well as a list of arguments.

Suggested-by: Stephen Warren <swarren@nvidia.com>

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-08-05 20:55:20 -04:00
Simon Glass
72f5226894 test: Fix typos in comments
Fix some typos in various files introduced with the vboot test conversion.

Reported-by: Teddy Reed <teddy.reed@gmail.com>

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-08-05 20:55:20 -04:00
Simon Glass
bcbd0c8fe1 test: Fix typos and tidy up
Fix review comments that were missed at the time. Also explain why we need
to regenerate the device tree for each test.

Reported-by: Teddy Reed <teddy.reed@gmail.com>
Suggested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes: f6349c3c (test: Add a README)
2016-08-05 20:55:19 -04:00
Michal Simek
04a4786c7c test/py: vboot can be run only at Sandbox
Getting this error:
Zynq> sb load hostfs - 100
/home/monstr/data/disk/u-boot/build-zynq_zc706/test.fit
Unknown command 'sb' - try 'help'

because sb command is present only for Sandbox
obj-$(CONFIG_SANDBOX) += host.o

that's why mark this test to be run only at Sandbox

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-07-22 14:52:04 -04:00
Stephen Warren
c9ba60c438 test/py: use absolute dts path in vboot test
Without this, the test fails if the test is run with a cwd other than the
root of the U-Boot source tree.

Fixes: 8729d58259 ("test: Convert the vboot test to test/py")
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-22 14:46:24 -04:00
Simon Glass
f60d0603ed test: Adjust the of-platdata test run condition
This should be spl_of_platdata, since otherwise it will try to run on boards
that don't support of-platdata.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-16 21:01:44 -04:00
Tom Rini
ebe621d5fb Merge git://git.denx.de/u-boot-dm 2016-07-15 08:06:22 -04:00
Simon Glass
b979d3d4c5 dm: Add a test for of-platdata
Add a simple test which checks that the of-platdata system is working
correctly. The sequence is as follows:

- SPL starts up and probes all the UCLASS_MISC drivers
- There are 3 of these in sandbox.dts
- Therefore there should be 3 U_BOOT_DEVICE() declarations in dt-platdata.c
- These should produce 3 sandbox_spl_test devices
- Each device prints out its platform data when probed
- This test checks for this output and compares it against expectations

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 20:40:24 -06:00
Simon Glass
8729d58259 test: Convert the vboot test to test/py
Now that we have a suitable test framework we should move all tests into it.
The vboot test is a suitable candidate. Rewrite it in Python and move the
data files into an appropriate directory.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 18:22:40 -04:00
Stephen Warren
a82642f398 test/py: fix CONFIG_ tests
Some CONFIG_ variables were recently renamed, but test/py wasn't updated
to match. This causes some tests to be skipped. Fix test/py so the tests
are run.

Fixes: 1163625898 ("Rename reset to sysreset")
Fixes: f1f9d4fac5 ("hush: complete renaming CONFIG_SYS_HUSH_PARSER to CONFIG_HUSH_PARSER")
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2016-07-08 12:47:58 -04:00
Stephen Warren
7a8f886558 test/py: fix printenv signon message disable code
CONFIG_VERSION_VARIABLE isn't always defined, so we can't simply look up
its value directly, or an exception will occur if it isn't defined.
Instead, we must use .get() to supply a default value if the variable
isn't defined.

Fixes: da37f006e7 ("tests: py: disable main_signon check for printenv cmd")
Acked-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2016-06-19 09:50:56 -04:00
Heiko Schocher
da37f006e7 tests: py: disable main_signon check for printenv cmd
if CONFIG_VERSION_VARIABLE is set, the U-Boot environment
contains a "vers" variable with the current U-Boot version
string. If now "printenv" is called, test/py fails as it
detects the main_sign string, which is in this case correct.

So check only the main_sign as an error, if CONFIG_VERSION_VARIABLE
is not set.

Signed-off-by: Heiko Schocher <hs@denx.de>
2016-06-09 13:53:05 -04:00
Stephen Warren
daa69f5f5d test/py: dfu: wait for USB device to go away at boot
It can take a while for a host machine to notice that a USB device has
disconnected, and process the change. At the end of the DFU test, we wait
up to 10 seconds for this to happen. This change makes the test wait the
same (up to) 10 seconds at the start of the test for any previously active
USB device-mode session to be cleaned up. Such as session might have been
used to download U-Boot into memory for example; this is certainly true
on my Tegra test systems. This changes should solve the DFU test
intermittency issues I've been seeing on some Tegra devices.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
2016-05-06 10:10:53 -04:00
Lukasz Majewski
f3a87f5b79 tests: py: dfu: Provide functionality to set test and dummy files alt settings
After concatenation of "dfu_alt_info" variable from "dfu_alt_boot" and
"dfu_alt_system" it may happen that test and dummy files alt settings
are different than default 0 and 1.

This patch provides the ability to set different values for them.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
---
Changes for v3:
- replace variables declarations with ones read from configuration file
- remove not necessary str() conversion at DFU host command generation

Changes for v2:
- generate "alt_info" automatically
- use file names as alt settings instead of numerical values
- extend in-code documentation
2016-04-25 17:56:30 +02:00
Lukasz Majewski
8eb3752446 tests: py: dfu: Add functionality to set different u-boot's dfu env variable
By default (on almost all systems) the dfu env variable, which defines
available alt settings, is named as "dfu_alt_info".

However on some platforms (i.e. Odroid XU3), the 'dfu_alt_info' is concatenated
from other variables - namely 'dfu_alt_boot' and 'dfu_alt_system' at run time
(when one types 'dfu 0 mmc 0' for first time).

'dfu_alt_boot' describes alt settings which depend on boot medium - for example
boot loader's LBA sectors which are different on eMMC and SD card because of e.g.
MBR/GPT.

'dfu_alt_system' describes board agnostic alt settings - like rootfs, kernel.
On such system we can only append/modify this env variable.

Because of the above, we must have way to modify other than "dfu_ale_info"
variable to perform tests.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
---
Changes for v3:
- None

Changes for v2:
- Rewrite of "alt_info_env_name" variable description
- Use of get() method on python's dictionary to easily obtain default
  value
2016-04-25 17:56:30 +02:00
Lukasz Majewski
c6eb899c4d tests: py: dfu: Add variables to store dfu alt numbers for test and dummy files
This patch replaces hardcoded (i.e. 0 and 1) values passed to dfu_{read|write}
with variables.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
---
Changes for v3:
- Replace per module global variables with ones defined inside a function
Changes for v2:
- None
2016-04-25 17:56:29 +02:00
Michal Simek
3ba1352b97 test/py: Add support for loading image via tftp to specified location
For example this setting:

env__net_tftp_readable_file = {
    "fn": "ep108/image.ub",
    "addr": 0x10000000,
    "size": 25846296,
    "crc32": "b726f9de",
}

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
2016-04-11 20:48:22 -04:00
Stephen Warren
24862c640e test/py: skip tests that require large CONFIG_SYS_MAXARGS
test_hush_if_test.py executes commands that require large values of
CONFIG_SYS_MAXARGS. Detect cases where the configured value is too low
and skip those tests.

Ideally, this would be implemented inside console.run_command(). However,
the command passed to that function is already a completely formed string,
and determining its argument count usage would require splitting commands
at ;, handling quoting to deal with arguments containing spaces, etc. Even
passing the command as a list wouldn't solve all these issues, since we'd
still need to split commands on ; and deal with cases like "if test ..."
which consumes 0 of the argument count.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Simon Glass <sjg@chromium.org>
2016-02-26 08:42:12 -05:00
Stephen Warren
1cd85f571d test/py: run all "ut" subtests
Invoke each "ut"-based unit test as a separate pytest.

Now that the DM unit test runs under test/py, remove the manual shell
script that invokes it.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org> # v2, on sandbox
2016-02-15 20:58:26 +00:00
Stephen Warren
89ab841088 test/py: support running sandbox under gdbserver
Implement command--line option --gdbserver COMM, which does two things:

a) Run the sandbox process under gdbserver, using COMM as gdbserver's
   communication channel.

b) Disables all timeouts, so that if U-Boot is halted under the debugger,
   tests don't fail. If the user gives up in the middle of a debugging
   session, they can simply CTRL-C the test script to abort it.

This allows easy debugging of test failures without having to manually
re-create the failure conditions. Usage is:

Window 1:
./test/py/test.py --bd sandbox --gdbserver localhost:1234

Window 2:
gdb ./build-sandbox/u-boot -ex 'target remote localhost:1234'

When using this option, it likely makes sense to use pytest's -k option
to limit the set of tests that are executed.

Simply running U-Boot directly under gdb (rather than gdbserver) was
also considered. However, this was rejected because:

a) gdb's output would then be processed by the test script, and likely
   confuse it causing false failures.

b) pytest by default hides stdout from tests, which would prevent the
   user from interacting with gdb.

   While gdb can be told to redirect the debugee's stdio to a separate
   PTY, this would appear to leave gdb's stdio directed at the test
   scripts and the debugee's stdio directed elsewhere, which is the
   opposite of the desired effect. Perhaps some complicated PTY muxing
   and process hierarchy could invert this. However, the current scheme
   is simple to implement and use, so it doesn't seem worth complicating
   matters.

c) Using gdbserver allows arbitrary debuggers to be used, even those with
   a GUI. If the test scripts invoked the debugger themselves, they'd have
   to know how to execute arbitary applications. While the user could hide
   this all in a wrapper script, this feels like extra complication.

An interesting future idea might be a --gdb-screen option, which could
spawn both U-Boot and gdb separately, and spawn the screen into a newly
created window under screen. Similar options could be envisaged for
creating a new xterm/... too.

--gdbserver  currently only supports sandbox, and not real hardware.
That's primarily because the test hooks are responsible for all aspects of
hardware control, so there's nothing for the test scripts themselves can
do to enable gdbserver on real hardware. We might consider introducing a
separate --disable-timeouts option to support use of debuggers on real
hardware, and having --gdbserver imply that option.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
2016-02-08 10:22:39 -05:00