Bug 705856 - Enable SPS profiler on desktop Linux. r=BenWa

--HG--
extra : rebase_source : 1b47cb9924451b7a581f440a3df9d9a4fdf4c0ec

tools/profiler/Makefile.in

@@ -78,7 +78,7 @@ EXTRA_JS_MODULES = \
   Profiler.jsm \
   $(NULL)
 
-ifeq ($(OS_TARGET),Android)
+ifneq (,$(filter Android Linux,$(OS_TARGET)))
 
 DEFINES += -DMOZ_ENABLE_PROFILER_SPS
 

tools/profiler/sampler.h

@@ -86,7 +86,7 @@
 #endif
 
 // Redefine the macros for platforms where SPS is supported.
-#if defined(ANDROID) || defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(ANDROID) || defined(XP_LINUX) || defined(XP_MACOSX) || defined(XP_WIN)
 
 #include "sps_sampler.h"
 
@@ -106,6 +106,7 @@
 #define SAMPLER_GET_RESPONSIVENESS() NULL
 #define SAMPLE_LABEL(name_space, info)
 #define SAMPLE_MARKER(info)
-#endif
 
 #endif
+
+#endif // ifndef SAMPLER_H

tools/profiler/sps/platform-linux.cc

@@ -47,6 +47,15 @@
 #define PATH_MAX_TOSTRING(x) #x
 #define PATH_MAX_STRING(x) PATH_MAX_TOSTRING(x)
 
+#if defined(__GLIBC__)
+// glibc doesn't implement gettid(2).
+#include <sys/syscall.h>
+pid_t gettid()
+{
+  return (pid_t) syscall(SYS_gettid);
+}
+#endif
+
 #ifdef ENABLE_SPS_LEAF_DATA
 /* a crapy version of getline, because it's not included in bionic */
 static ssize_t getline(char **lineptr, size_t *n, FILE *stream)
@@ -194,7 +203,6 @@ class Sampler::PlatformData : public Malloced {
       : sampler_(sampler),
         signal_handler_installed_(false),
         vm_tgid_(getpid()),
-        // Glibc doesn't provide a wrapper for gettid(2).
         vm_tid_(gettid()),
         signal_sender_launched_(false) {
   }

tools/profiler/sps/sps_sampler.h

@@ -37,6 +37,7 @@
  * ***** END LICENSE BLOCK ***** */
 
 #include <stdlib.h>
+#include <signal.h>
 #include "thread_helper.h"
 #include "nscore.h"
 #include "mozilla/TimeStamp.h"