When the builder loads a dockerfile, it does it by using the base name
of the dockerfile path and only loads the innermost directory. This
means that the source name we're looking for is the base name and not
the full relative path.
Update the set breakpoints functionality so it takes this into account.
Fixes scenarios where DAP is used with a dockerfile nested in the
context.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
Add a file explorer to the debugger that allows exploring the filesystem
of the current container. It will show directory contents, file
contents, and symlink destinations. It will also show the file mode
associated with a file.
The file explorer defaults to marking itself as an expensive operation
so the debugger doesn't automatically retrieve the information.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
Change how breakpoints and stepping works. These now work more how you
would expect another programming language to work. Breakpoints happen
before the step has been invoked rather than after which means you can
inspect the state before the command runs.
This has the advantage of being more intuitive for someone familiar with
other debuggers. The negative is that you can't run to after a certain
step as easily as you could before. Instead, you would run to that stage
and then use next to go to the step directly afterwards.
Step in and out also now have different behaviors. When a step has
multiple inputs, the inputs of non-zero index are considered like
"function calls". The most common cause of this is to use `COPY --from`
or a bind mount. Stepping into these will cause it to jump to the
beginning of the call chain for that branch. Using step out will exit
back to the location where step in was used.
This change also makes it so some steps may be invoked multiple times in
the callgraph if multiple steps depend on them. The reused steps will
still be cached, but you may end up stepping through more lines than the
previous implementation.
Stack traces now represent where these step in and step out areas
happen rather than the previous steps. This can help you know from where
a certain step is being used.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
Implement variable references to inspect the state of a stack frame.
Variable reference ids are composed of two sections. A thread mask that
is the first 8 bytes and the remainder is an increasing number that gets
reset each time a thread is resumed. This allows the adapter to know
which thread to delegate the variables request to and allows the
variable references to still remain confined to each thread. An int32 is
used for this because variable references need to be in the range of
(0, 2^32).
At the moment, only the platform variables and some of the exec
operations for an operation. These are labeled as "arguments" to the
stack frame.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
Jonathan A. Sternberg