SWDEV-227201: Introduce tests for printf on hostcall

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

tests/src/printf/printf_common.h

@@ -0,0 +1,94 @@
+#ifndef COMMON_H
+#define COMMON_H
+
+#include <errno.h>
+#include <error.h>
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <stdlib.h>
+#include <string>
+#include <unistd.h>
+
+struct CaptureStream {
+  int saved_fd;
+  int orig_fd;
+  int temp_fd;
+
+  char tempname[13] = "mytestXXXXXX";
+
+  CaptureStream(FILE *original) {
+    orig_fd = fileno(original);
+    saved_fd = dup(orig_fd);
+
+    temp_fd = mkstemp(tempname);
+    if (errno) {
+      error(0, errno, "Error");
+      assert(false);
+    }
+
+    fflush(nullptr);
+    dup2(temp_fd, orig_fd);
+    if (errno) {
+      error(0, errno, "Error");
+      assert(false);
+    }
+    close(temp_fd);
+    if (errno) {
+      error(0, errno, "Error");
+      assert(false);
+    }
+  }
+
+  void restoreStream() {
+    if (saved_fd == -1)
+      return;
+    fflush(nullptr);
+    dup2(saved_fd, orig_fd);
+    if (errno) {
+      error(0, errno, "Error");
+      assert(false);
+    }
+    close(saved_fd);
+    if (errno) {
+      error(0, errno, "Error");
+      assert(false);
+    }
+    saved_fd = -1;
+  }
+
+  std::ifstream getCapturedData() {
+    restoreStream();
+    std::ifstream temp(tempname);
+    return temp;
+  }
+
+  ~CaptureStream() {
+    restoreStream();
+    remove(tempname);
+    if (errno) {
+      error(0, errno, "Error");
+      assert(false);
+    }
+  }
+};
+
+static std::string gulp(std::ifstream &input) {
+  std::string retval;
+  input.seekg(0, std::ios_base::end);
+  retval.resize(input.tellg());
+  input.seekg(0, std::ios_base::beg);
+  input.read(&retval[0], retval.size());
+  input.close();
+  return retval;
+}
+
+#define DECLARE_DATA()                                                         \
+  const char *msg_short = "Carpe diem.";                                       \
+  const char *msg_long1 = "Lorem ipsum dolor sit amet, consectetur nullam. "   \
+                          "In mollis imperdiet nibh nec ullamcorper.";         \
+  const char *msg_long2 = "Curabitur nec metus sit amet augue vehicula "       \
+                          "ultrices ut id leo. Lorem ipsum dolor sit amet, "   \
+                          "consectetur adipiscing elit amet.";
+
+#endif