Fixes #645

Since we store all signed integers as int64 the sign bit should be
extended, otherwise we read negative integers as their 2-complement
value.

* proc: Add `wd` to Launch

This change adds the `wd` arg which specify working directory of the
program.

Fixes #295

* service/debugger: Add `Wd` field to debugger.Config

This change adds the `Wd` field which specify working directory of the
program launched by debugger.

Fixes #295

* service: Add `Wd` to service.Config

This change adds the `Wd` field which specify working directory of the
program debugger will launch.

Fixes #295

* cmd/dlv: Add `Wd` flag

This change adds `Wd` flag which specify working directory of the
program which launched by debugger.

Fixes #295

* only set the Linux working directory if it is set,
stub out param in darwin and windows

* set working directory for Windows
https://godoc.org/golang.org/x/sys/windows#CreateProcess
https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425(v=vs.85).aspx

* Windows workingDir must be an *uint16

* attempt to chdir on darwin via @yuntan

* proc/exec_darwin.c: fix working directory for darwin

* Add tests to check if working directory works.
* Fix darwin implementation of fork/exec, which paniced if
  child fork returned.

* cmd, service: rename Wd to WorkingDir

Generate names of the concrete types stored inside interface variables
by fully parsing their runtime._type instead of simply using the str
field.

This allows delve to read the contents of an interface variable when
the program imports multiple packages that have the same name. It also
allows delve to correctly interpret some complex anonymous types.

Fixes #455

Allows to rewrite a source path stored in program's debug information,
if the sources were moved to a different place between compilation and
debugging.

Command to step out of the currently executing function.

Implements #358

If the location specification matches the name of a function exactly
return that function as a match event if the expression matches other
functions as well.

Without this some functions, like math/rand.Intn are unmatchable.

* proc: changed windows backend to deal with simultaneous breakpoints

* bugfix: forgot to add windowsPrologue3 to the prologues list in e4c7df14

* Tolerate errors returned by Stacktrace in TestStacktraceGoroutine.

* bugfix: proc: propagate debug events we don't cause back to the target process

Fixes: #594

* proc: fixed TestStepConcurrentPtr

Implementation of nextInProgress was wrong.

Instead of repeatedly calling StepInstruction set breakpoints to the
destination of CALL instructions (or on the CALL instructions
themselves for indirect CALLs), then call Continue.
Calls to unexported runtime functions are skipped.
Reduces the number of code paths managing inferior state from 3 to 2
(StepInstruction, Continue).

Fixes #561

When a deferred function is called directly Next and StepOut should not
step into it.

Fixes #582

Fixes #642

Allows quoted substrings in build-flags flag. This fixes a build
problem on windows where the default build flags must contain a space.

Fixes #634 and #638

Signed-off-by: NKoichi Shiraishi <zchee.io@gmail.com>

go1.8 changed the way anonymous struct names are generated for DWARF.

As suggested by Ederson de Souza.
https://groups.google.com/forum/?utm_medium=email#!msg/delve-dev/W_SfC3i9tf0/MY4QWaZOCgAJ

Updates #363

fix #531

Detect calls that do not target a function's entrypoint
(i.e, calls to runtime.duffzero and runtime.duffcopy) and
instead step into them directly.  StepInto sets a breakpoint
past the called function's prologue and expects that continue
will hit that breakpoint, but because the call is into the
interior of the function (well past the prologue) this fails.

Fixes #573

Fixes flakiness of TestCmdLineArgs.

Fixes #589

Patch https://go-review.googlesource.com/23085 has been merged so we
can go back to using golang.org/x/debug/.

See: https://github.com/golang/go/issues/16180

This version preserves the order of requests, allows the
client to switch between API versions and introduces a
way to send notifications to the client (see TODO item at:
proc/proc_linux.go:325).

Fixes #523, #571

This provides a better error message when the user tries to run dlv
debug on a directory that does not contain a main package, when `dlv
exec` is used with a source file.

Additionally the architecture of the executable is checked as suggested
by @alexbrainman in #443.

Fixes #509

This function was broken for a very long time until the changes in this
PR fixed it. However I do not think it is desirable to be catapulted
into some other goroutine by 'next' just because that other goroutine
happened to receive a message on a channel.

This feature should be implemented by a new command, not next.

Previously Step would step through the goroutine associated with
CurrentThread if SelectedGoroutine was parked

Previously Next would step through the goroutine associated with
CurrentThread if SelectedGoroutine was parked

Also fixes a bug with proc.(*Process).StepInto where StepInto could
switch to a different goroutine.