Improved the way juce_isRunningUnderDebugger() works on linux.

modules/juce_core/native/juce_linux_SystemStats.cpp

@@ -55,10 +55,10 @@ bool SystemStats::isOperatingSystem64Bit()
 //==============================================================================
 namespace LinuxStatsHelpers
 {
-    String getCpuInfo (const char* const key)
+    String getConfigFileValue (const char* file, const char* const key)
     {
         StringArray lines;
-        File ("/proc/cpuinfo").readLines (lines);
+        File (file).readLines (lines);
 
         for (int i = lines.size(); --i >= 0;) // (NB - it's important that this runs in reverse order)
             if (lines[i].upToFirstOccurrenceOf (":", false, false).trim().equalsIgnoreCase (key))
@@ -66,6 +66,11 @@ namespace LinuxStatsHelpers
 
         return String();
     }
+
+    String getCpuInfo (const char* key)
+    {
+        return getConfigFileValue ("/proc/cpuinfo", key);
+    }
 }
 
 String SystemStats::getDeviceDescription()
@@ -189,3 +194,13 @@ bool Time::setSystemTimeToThisTime() const
 
     return settimeofday (&t, 0) == 0;
 }
+
+JUCE_API bool JUCE_CALLTYPE juce_isRunningUnderDebugger()
+{
+   #if JUCE_BSD
+    return false;
+   #else
+    return LinuxStatsHelpers::getConfigFileValue ("/proc/self/status", "TracerPid")
+             .getIntValue() > 0;
+   #endif
+}

modules/juce_core/native/juce_linux_Threads.cpp

@@ -52,28 +52,6 @@ JUCE_API void JUCE_CALLTYPE Process::setPriority (const ProcessPriority prior)
     pthread_setschedparam (pthread_self(), policy, &param);
 }
 
-JUCE_API bool JUCE_CALLTYPE juce_isRunningUnderDebugger()
-{
-   #if JUCE_BSD
-    return false;
-   #else
-    static char testResult = 0;
-
-    if (testResult == 0)
-    {
-        testResult = (char) ptrace (PT_TRACE_ME, 0, 0, 0);
-
-        if (testResult >= 0)
-        {
-            ptrace (PT_DETACH, 0, (caddr_t) 1, 0);
-            testResult = 1;
-        }
-    }
-
-    return testResult < 0;
-   #endif
-}
-
 JUCE_API bool JUCE_CALLTYPE Process::isRunningUnderDebugger()
 {
     return juce_isRunningUnderDebugger();