Bug 613367: Log relevant data when computing JIT-brokenness. r=dvander a=2.0

js/src/jscntxt.cpp

@@ -46,6 +46,7 @@
 #include <stdlib.h>
 #include <string.h>
 #ifdef ANDROID
+# include <android/log.h>
 # include <fstream>
 # include <string>
 #endif  // ANDROID
@@ -2221,12 +2222,17 @@ ComputeIsJITBroken()
     // Check for the known-bad kernel version (2.6.29).
     std::ifstream osrelease("/proc/sys/kernel/osrelease");
     std::getline(osrelease, line);
+    __android_log_print(ANDROID_LOG_INFO, "Gecko", "Detected osrelease `%s'",
+                        line.c_str());
+
     if (line.npos == line.find("2.6.29")) {
         // We're using something other than 2.6.29, so the JITs should work.
+        __android_log_print(ANDROID_LOG_INFO, "Gecko", "JITs are not broken");
         return false;
     }
 
     // We're using 2.6.29, and this causes trouble with the JITs on i9000.
+    line = "";
     bool broken = false;
     std::ifstream cpuinfo("/proc/cpuinfo");
     do {
@@ -2241,6 +2247,8 @@ ComputeIsJITBroken()
             };
             for (const char** hw = &blacklist[0]; *hw; ++hw) {
                 if (line.npos != line.find(*hw)) {
+                    __android_log_print(ANDROID_LOG_INFO, "Gecko",
+                                        "Blacklisted device `%s'", *hw);
                     broken = true;
                     break;
                 }
@@ -2249,6 +2257,10 @@ ComputeIsJITBroken()
         }
         std::getline(cpuinfo, line);
     } while(!cpuinfo.fail() && !cpuinfo.eof());
+
+    __android_log_print(ANDROID_LOG_INFO, "Gecko", "JITs are %sbroken",
+                        broken ? "" : "not ");
+
     return broken;
 #endif  // ifndef ANDROID
 }