Allow concurent generation of XML routing files

BZ: 145938

XML generation is impossible when multiple instances of the script
hostDomainGeneration are run (this is typically the case with the
current Android Make process). This is because the way the ports
used to communicate with test-platform and parameter-framework are
chosen is not protected agains concurrent executions.

This patch protects the initialization of the test-platform and
parameter-framework agains concurrent executions using a flock.
In particular, it ensures that the ports chosen are reserved to
a specific process.

Change-Id: I3d8fee2b20313814c79f5390851ad57dc696cc28
Signed-off-by: Frédéric Boisnard <fredericx.boisnard@intel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/tools/xmlGenerator/hostDomainGenerator.sh b/tools/xmlGenerator/hostDomainGenerator.sh
index 1d4d79b..c618f46 100755
--- a/tools/xmlGenerator/hostDomainGenerator.sh
+++ b/tools/xmlGenerator/hostDomainGenerator.sh
@@ -65,6 +65,7 @@ TargetRoot="$ANDROID_PRODUCT_OUT/system"
 # Global variables
 TPSocket=5003
 PFWSocket=5000
+PFWStartTimeout=60
 
 tmpFile=$(mktemp)
 testPlatformPID=0
@@ -82,6 +83,7 @@ export LD_LIBRARY_PATH="$HostRoot/lib:${LD_LIBRARY_PATH:-}"
 # Setup clean trap, it will be called automatically on exit
 clean_up () {
     status=$?
+
     echo "Clean sub process: $testPlatformPID"
     test $testPlatformPID != 0 && kill $testPlatformPID 2>&1
     rm "$tmpFile"
@@ -140,7 +142,9 @@ initTestPlatform () {
     formatConfigFile "$1" >"$tmpFile"
 
     # Check port is free
+    echo "Checking port $TPSocket for TestPlatform"
     ! portIsInUse $TPSocket || return 4
+    echo "Port $TPSocket is available for TestPlatform"
 
     # Start test platform
     $testPlatform "$tmpFile" $TPSocket 2>&5 &
@@ -172,7 +176,9 @@ launchTestPlatform () {
     $TPSendCommand setFailureOnFailedSettingsLoad false
 
     # Check port is free
+    echo "Checking port $PFWSocket for PFW"
     ! portIsInUse $PFWSocket || return 5
+    echo "Port $PFWSocket is available for PFW"
 
     $TPSendCommand start
     if ! retry "$remoteProcess $PFWHost $PFWSocket help" 2 0.1
@@ -215,8 +221,21 @@ deleteEscapedNewLines () {
 linkLibrary libremote-processor_host.so libremote-processor.so
 
 # Start test platform and the PFW
+#
+# Creation of a critical section to ensure that the startup of the PFW (involving
+# sockets creation to communicate with the test platform and the PFW) is serialized
+# between potential concurrent execution of this script
+#
+# Acquire an exclusive lock on the file descriptor 200
+exec 200>/var/lock/.hostDomainGenerator.lockfile
+flock --timeout $PFWStartTimeout 200
+
+# Start the pfw using different socket if it fails
 safeStartPFW
 
+# Release the lock
+flock --unlock 200
+
 PFWSendCommand="$remoteProcess $PFWHost $PFWSocket"
 
 $PFWSendCommand setTuningMode on