Bug 983022 - [tarako] Need minidump screen shot. r=ted, r=gal

dom/ipc/CrashReporterParent.cpp

@@ -127,6 +127,8 @@ CrashReporterParent::GenerateChildData(const AnnotationTable* processNotes)
         ret = CrashReporter::AppendExtraData(mChildDumpID, *processNotes);
     if (!ret)
         NS_WARNING("problem appending child data to .extra");
+    if (!CrashReporter::WriteScreenShotToFile(mChildDumpID))
+        NS_WARNING("problem writing screen shot to .raw");
     return ret;
 }
 #endif

toolkit/crashreporter/nsExceptionHandler.cpp

@@ -10,6 +10,7 @@
 #include "mozilla/Services.h"
 #include "nsIObserverService.h"
 #include "mozilla/unused.h"
+#include "mozilla/FileUtils.h"
 
 #include "nsThreadUtils.h"
 #include "nsXULAppAPI.h"
@@ -80,6 +81,7 @@ using mozilla::InjectCrashRunnable;
 #include "prprf.h"
 #include <map>
 #include <vector>
+#include <linux/fb.h>
 
 #include "mozilla/IOInterposer.h"
 #include "mozilla/mozalloc_oom.h"
@@ -2260,6 +2262,38 @@ GetExtraFileForMinidump(nsIFile* minidump, nsIFile** extraFile)
   return true;
 }
 
+bool
+WriteScreenShotToFile(const nsAString& id)
+{
+  const char *envvar = PR_GetEnv("MOZ_CRASHREPORTER_DUMP_FB");
+  if (!envvar || !*envvar || !pendingDirectory)
+    return false;
+
+  ScopedClose fb(open("/dev/graphics/fb0", O_RDONLY));
+  if (fb.get() < 0)
+    return false;
+
+  struct fb_fix_screeninfo fi;
+  if (ioctl(fb.get(), FBIOGET_FSCREENINFO, &fi) < 0)
+    return false;
+
+  void* bits = mmap(0, fi.smem_len, PROT_READ, MAP_SHARED, fb.get(), 0);
+  if (MAP_FAILED == bits)
+    return false;
+
+  char path[PATH_MAX];
+  sprintf(path, "%s/%s.raw", pendingDirectory, NS_ConvertUTF16toUTF8(id).get());
+  ScopedClose fd(open(path, O_WRONLY | O_CREAT | O_TRUNC));
+  if (fd.get() < 0) {
+    munmap(bits, fi.smem_len);
+    return false;
+  }
+
+  write(fd.get(), bits, fi.smem_len);
+  munmap(bits, fi.smem_len);
+  return true;
+}
+
 bool
 AppendExtraData(const nsAString& id, const AnnotationTable& data)
 {

toolkit/crashreporter/nsExceptionHandler.h

@@ -80,6 +80,7 @@ bool GetMinidumpForID(const nsAString& id, nsIFile** minidump);
 bool GetIDFromMinidump(nsIFile* minidump, nsAString& id);
 bool GetExtraFileForID(const nsAString& id, nsIFile** extraFile);
 bool GetExtraFileForMinidump(nsIFile* minidump, nsIFile** extraFile);
+bool WriteScreenShotToFile(const nsAString& id);
 bool AppendExtraData(const nsAString& id, const AnnotationTable& data);
 bool AppendExtraData(nsIFile* extraFile, const AnnotationTable& data);
 void RenameAdditionalHangMinidump(nsIFile* minidump, nsIFile* childMinidump,