This adds a workaround for the bug described at:
https://github.com/golang/go/issues/25841
Because dsymutil running on PIE does not adjust the address of
debug_frame entries (but adjusts debug_info entries) we try to do the
adjustment ourselves.
Updates #2346
- remove github workflow for testing macOS/amd64 that is now covered by
TeamCity
- fix DeepSource glob patterns to actually match what they are intended
to match (did the interpretation change?)
- disable some cgo tests on darwin/arm64
Delve represents registerized variables (fully or partially) using
compositeMemory, implementing proc.(*compositeMemory).WriteMemory is
necessary to make SetVariable and function calls work when Go will
switch to using the register calling convention in 1.17.
This commit also makes some refactoring by moving the code that
converts between register numbers and register names out of pkg/proc
into a different package.
* TeamCity: add linux/arm64/tip configuration
So that it can be tested when we make the next-version-support-branch.
* tests: disable failing cgo tests on arm64
When cgo is used the address of the g struct is saved on the special
register TPIDR_EL0. Because executing C code could overwrite the
contents of R28 that normally contains the address of g we should read
it from TPIDR_EL0 instead when runtime.iscgo is set.
* Reformat pkg/locspec documentation so that it is formatted correctly
by godoc/pkgsite
* Unexport some types and variables in proc that don't need to be
exported.
* proc/core: off-by-one error reading ELF core files
core.(*splicedMemory).ReadMemory checked the entry interval
erroneously when dealing with contiguous entries.
* terminal,service,proc/*: adds dump command (gcore equivalent)
Adds the `dump` command that creates a core file from the target process.
Backends will need to implement a new, optional, method `MemoryMap` that
returns a list of mapped memory regions.
Additionally the method `DumpProcessNotes` can be implemented to write out
to the core file notes describing the target process and its threads. If
DumpProcessNotes is not implemented `proc.Dump` will write a description of
the process and its threads in a OS/arch-independent format (that only Delve
understands).
Currently only linux/amd64 implements `DumpProcessNotes`.
Core files are only written in ELF, there is no minidump or macho-o writers.
# Conflicts:
# pkg/proc/proc_test.go
Both structMember and findMethod implemented a depth-first search in
embedded fields but the Go specification requires a breadth-first
search. They also allowed promotion of fields in the concrete type of
embedded interfaces even though this is not allowed by Go.
Furthermore they both lacked protection from infinite recursion
when a type embeds itself and the user requests a non-existent field.
Fixes#2316
Add a helper method for collecting line table file references that
does the correct thing for DWARF 5 vs DWARF 4 (in the latter case you
have an implicit 0 entry which is the comp dir, whereas in the former
case you do not). This is to avoid out-of-bounds errors when examining
the file table section of a DWARF 5 compilation unit's line table.
Included is a new linux/amd-only test that includes a precompiled C
object file with a DWARF-5 section that triggers the bug in question.
Fixes#2319
The DWARF standard does not say that a DW_ATTR_abstract_origin can only
reference entries that appear before it, this change fixes BinaryInfo
to comply. See #2284 for an example of this happening.
Changs TestClientServer_FullStacktrace and
Test1ClientServer_FullStacktrace to log more information, also removes
code from TestFrameEvaluation that could mask the error.
Updates #2231
* add -json flag when running tests on TeamCity
* introduce TeamCity builds
* restore gdbserial constants for 386
Otherwise compilation fails.
* skip TestAttachRequest on Windows as it never finishes
* run tests on 1.16beta1
* proc: misc test fixes for Go 1.16
* proc: fix cgo stacktraces in Go 1.16 with simplified C -> Go call path
* dwarf/line: make dwarf/line correct when '\\' are used
Our code depends heavily on paths being '/' separated because go always
produced '/' separated file paths. The call to filepath.Join will
normalize the paths, on windows, to always be '\\' separated, which
violated our assumptions.
This didn't use to be a problem because the codepath that calls
filepath.Join was never exercised by executable files produced by Go,
but Go 1.16 started producing debug_line sections that use the
directory table with https://go-review.googlesource.com/c/go/+/263017/.
Fix this to always use path.Join after making sure, on windows, to
always normalize paths to use '/' as a separator. Replace the use of
filepath.IsAbs with an operating system independent version.
* goversion: bump supported Go version
If a thread exits while we are looking at it just treat it as if the
status had reported it as exited instead of doing something special.
Fixes flakiness in TestIssue387.
Fix bug in DAP test: TestEvaluateCallRequest.
In Go 1.15 the call injection will be executed on a different goroutine
from the goroutine where it was started on to avoid confusing the
garbage collector, the test must be aware of this fact and use the
goroutine ID from the stopped response instead of assuming 1 is the
currently selected goroutine.
Disables TestAttachDetach when running in Github Actions.
Disable some coredump tests when running in Github Actions (core size
limits?).
The comment on the advanceRegs() method was referencing several
nonexistent fields. This patch fixes that, and improves the comment to
reference the peculiar interaction between the method and it.regs.
evalFunctionCall needs to remove the breakpoint from the current thread
after starting the function call injection, otherwise Continue will
think that the thread is stopped at a breakpoint and return to the user
instead of continuing the call injection.
Adds a flag that distinguishes the return values of an injected
function call from the return values of a function call executed by the
target program.
* Use the active xcode-select path instead of a hardcoded Xcode path
* Refactored exec.Command to invoke Output instead of running with a custom buffer for stdout
Addresses review comment by @derekparker
1. Forward stdin/stdout/stderr to the target process when in foreground
mode instead of always forwarding the current tty (issue #1964)
2. When redirecting a file descriptor make sure to also specify
something for all three otherwise debugserver will misbehave (either
exit on launch or run but giving the target process a closed file
descriptor).
Fixes#1964
On linux we can not read memory if the thread we use to do it is
occupied doing certain system calls. The exact conditions when this
happens have never been clear.
This problem was worked around by using the Blocked method which
recognized the most common circumstances where this would happen.
However this is a hack: Blocked returning true doesn't mean that the
problem will manifest and Blocked returning false doesn't necessarily
mean the problem will not manifest. A side effect of this is issue
#2151 where sometimes we can't read the memory of a thread and find its
associated goroutine.
This commit fixes this problem by always reading memory using a thread
we know to be good for this, specifically the one returned by
ContinueOnce. In particular the changes are as follows:
1. Remove (ProcessInternal).CurrentThread and
(ProcessInternal).SetCurrentThread, the "current thread" becomes a
field of Target, CurrentThread becomes a (*Target) method and
(*Target).SwitchThread basically just sets a field Target.
2. The backends keep track of their own internal idea of what the
current thread is, to use it to read memory, this is the thread they
return from ContinueOnce as trapthread
3. The current thread in the backend and the current thread in Target
only ever get synchronized in two places: when the backend creates a
Target object the currentThread field of Target is initialized with the
backend's current thread and when (*Target).Restart gets called (when a
recording is rewound the currentThread used by Target might not exist
anymore).
4. We remove the MemoryReadWriter interface embedded in Thread and
instead add a Memory method to Process that returns a MemoryReadWriter.
The backends will return something here that will read memory using
the current thread saved by the backend.
5. The Thread.Blocked method is removed
One possible problem with this change is processes that have threads
with different memory maps. As far as I can determine this could happen
on old versions of linux but this option was removed in linux 2.5.
Fixes#2151
TestStepConcurrentDirect will occasionally fail (7% of the time on my
setup) by either causing the target processs to execute an invalid
instruction or (more infrequently) by switching to the wrong thread.
Both of those are caused by receiving SIGTRAPs for threads hitting a
breakpoint after it has been removed (the thread hits the breakpoint,
we stop everything and remove the breakpoint and only after we receive
the signal).
Change native.(*nativeProcess).stop to handle SIGTRAPs that can't be
attributed to a breakpoint, a hardcoded breakpoint in the program's
text, or manual stops (and therefore are likely caused by phantom
breakpoint hits).
Co-authored-by: a <a@kra>
Due to a missing check TestCgoStacktrace2 didn't actually check
anything. Enable it and then skip it on linux/386 and linux/arm64 where
it's broken.
Co-authored-by: a <a@kra>
If the process receives a signal (or sends a singal to itself) and then
dies before we can route the signal back to it we still need to
retrieve its exit status.
Fixes a rare failure of TestIssue1101 in proc_test.go
Co-authored-by: a <a@kra>
* proc/tests: keep track of tests skipped due to backend problems
Mark tests skipped due to backend problems and add a script to keep
track of them.
* Travis-CI: add ignorechecksum option to chocolatey command
Looks like a configuration problem on chocolatey's end.
* proc: use argument position for addr only when injecting function calls
We can not, in general, use the argument position to determine the
address of a formal parameter, it will not work in presence of
optimizations or inlining. In those cases formal arguments could be
stored in registers.
Fixes#2176
* Travis-CI: add ignorechecksum option to chocolatey command
Looks like a configuration problem on chocolatey's end.
Co-authored-by: a <a@kra>
* Revert "proc: Find executable should follow symbol links."
This reverts commit 3e04ad0fada0c3ab57caf58bc024e4c0f9a3e01a.
* proc: resolve symlinks when searching for split debug_info if path is /proc/pid/exe
Fixes#2168
