Update run_fvp and run_qemu scripts, to capture and return the stdout and stderr to the calling function.

Author: vrukesh

arm-software/embedded/arm-runtimes/test-support/lit-exec-fvp.py

@@ -77,7 +77,7 @@ def main():
         help="optional arguments for the image",
     )
     args = parser.parse_args()
-    ret_code = run_fvp(
+    ret_code, data, err = run_fvp(
         args.fvp_install_dir,
         args.fvp_config_dir,
         args.fvp_model,

arm-software/embedded/arm-runtimes/test-support/lit-exec-qemu.py

@@ -69,7 +69,7 @@ def main():
         help="optional arguments for the image",
     )
     args = parser.parse_args()
-    ret_code = run_qemu(
+    ret_code, data, err = run_qemu(
         args.qemu_command,
         args.qemu_machine,
         args.qemu_cpu,

arm-software/embedded/arm-runtimes/test-support/picolibc-test-wrapper.py

@@ -142,7 +142,7 @@ def main():
         help="optional arguments for the image",
     )
     args = parser.parse_args()
-    ret_code = run(args)
+    ret_code, data, err = run(args)
     sys.exit(ret_code)
 
 

arm-software/embedded/arm-runtimes/test-support/run_fvp.py

@@ -212,4 +212,4 @@ def run_fvp(
         result_stdout = result.stdout
 
     sys.stdout.buffer.write(result_stdout)
-    return result.returncode
+    return result.returncode, result.stdout.decode(), result.stderr.decode() if result.stderr != None else ""

arm-software/embedded/arm-runtimes/test-support/run_qemu.py

@@ -58,4 +58,4 @@ def run_qemu(
         check=False,
     )
     sys.stdout.buffer.write(result.stdout)
-    return result.returncode
+    return result.returncode, result.stdout.decode(), result.stderr.decode() if result.stderr != None else ""