Fix the behavior of ExecuteAndWait with a non-zero timeout.

llvm-svn: 209951

Add non-blocking Wait() for launched processes

- New ProcessInfo class to encapsulate information about child processes.
- Generalized the Wait() to support non-blocking wait on child processes.
- E

Add non-blocking Wait() for launched processes

- New ProcessInfo class to encapsulate information about child processes.
- Generalized the Wait() to support non-blocking wait on child processes.
- ExecuteNoWait() now returns a ProcessInfo object with information about
the launched child. Users will be able to use this object to
perform non-blocking wait.
- ExecuteNoWait() now accepts an ExecutionFailed param that tells if execution
failed or not.

These changes will allow users to implement basic process parallel
tools.

Differential Revision: http://llvm-reviews.chandlerc.com/D1728

llvm-svn: 191763

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Replace use of PathV1.h in Program.cpp.

llvm-svn: 183996

Avoid using PathV1.h in Program.h.

llvm-svn: 183940

Add a version of sys::ExecuteAndWait that takes StringRefs.

llvm-svn: 183934

[Support] Fix handle and memory leak for processes that are not waited for

Execute's Data parameter is now optional, so we won't allocate memory
for it on Windows and we'll close the process handle.

[Support] Fix handle and memory leak for processes that are not waited for

Execute's Data parameter is now optional, so we won't allocate memory
for it on Windows and we'll close the process handle.

The Unix code should probably do something similar to avoid accumulation
of zombie children that haven't been waited on.

Tested on Linux and Windows.

llvm-svn: 183906

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Zero-initializing variables; fixes a build breakage introduced in r183864.

llvm-svn: 183904

Remove the program class.

It was only used to implement ExecuteAndWait and ExecuteNoWait. Expose just
those two functions and make Execute and Wait implementations details.

llvm-svn: 183864

Add a boolean parameter to the ExecuteAndWait static function to indicated
if execution failed. ExecuteAndWait returns -1 upon an execution failure, but
checking the return value isn't sufficient be

Add a boolean parameter to the ExecuteAndWait static function to indicated
if execution failed. ExecuteAndWait returns -1 upon an execution failure, but
checking the return value isn't sufficient because the wait command may
return -1 as well. This new parameter is to be used by the clang driver in a
subsequent commit.
Part of rdar://13362359

llvm-svn: 178087

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Support/Program: Make Change<stream>ToBinary return error_code.

llvm-svn: 146522

Have Program::Wait return -2 for crashed and timeouts instead of embedding
info in the error message. Per Dan's request.

llvm-svn: 131780

Bugpoint support for miscompilations that result in a crash.

This change allows bugpoint to pinpoint the "opt" pass and bitcode
segment responsible for a crash caused by miscompilation. At least it

Bugpoint support for miscompilations that result in a crash.

This change allows bugpoint to pinpoint the "opt" pass and bitcode
segment responsible for a crash caused by miscompilation. At least it
works well for me now, without having to create any custom execution
wrappers.

llvm-svn: 131186

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Merge System into Support.

llvm-svn: 120298