On Windows there's something fundamentally broken about redirecting IO
into a file and then restoring that said IO to it's original state. Even
though no syscalls would fail, the output would sometimes either go into
CLI or straight up nowhere.
Simply using pipes instead of a temporary file magically resolves the
above issue ¯\_(ツ)_/¯
Unfortunately the max pipe size on Linux is 1Mb, which is not enough to
store all the data printed by the kernel. This leads to a softhang in
vprintf().
Stick to using a temporary file on Linux, but switch to pipes on
Windows. Slightly refactor the CaptureStream struct to accomadate this
difference.
Change-Id: Id8e68f150df47815a4f652ee2bcd6cfb7c3e3bac
Tests that check POSIX specifiers with a single thread:
- hipPrintfSpecifiers.cpp : all conversion specifiers
- hipPrintfFlags.cpp : common flags that modify conversions
- hipPrintfAltForms.cpp : alternate forms ('#')
- hipPrintfStar.cpp : additional arguments ('*')
- hipPrintfWidthPrecision.cpp : floating point details
Tests that check functionality on top of hostcall
- hipPrintfBasic.cpp : divergent calls, series of calls, return value, etc
- hipPrintfManyWaves.cpp : many waves printing together
- hipPrintfManyDevices.cpp : many waves on many devices
Change-Id: I35e069f4c542f896999239996dc89eda0faad7b8
Tao Sang
Vladislav Sytchenko
Saleel Kudchadker
Sameer Sahasrabuddhe