Fixing breakpad on old linux kernel

Try to read the trace's registers by PTRACE_GETREGS if kernel doesn't support PTRACE_GETREGSET.

Bug:

Change-Id: I881f3a868789747ca217f22a93370c6914881f9a
Reviewed-on: https://chromium-review.googlesource.com/484479
Reviewed-by: Mike Frysinger <vapier@chromium.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/client/linux/minidump_writer/linux_ptrace_dumper.h b/src/client/linux/minidump_writer/linux_ptrace_dumper.h
index 2ce834b0..cee58178 100644
--- a/src/client/linux/minidump_writer/linux_ptrace_dumper.h
+++ b/src/client/linux/minidump_writer/linux_ptrace_dumper.h
@@ -85,6 +85,15 @@ class LinuxPtraceDumper : public LinuxDumper {
  private:
   // Set to true if all threads of the crashed process are suspended.
   bool threads_suspended_;
+
+  // Read the tracee's registers on kernel with PTRACE_GETREGSET support.
+  // Returns false if PTRACE_GETREGSET is not defined.
+  // Returns true on success.
+  bool ReadRegisterSet(ThreadInfo* info, pid_t tid);
+
+  // Read the tracee's registers on kernel with PTRACE_GETREGS support.
+  // Returns true on success.
+  bool ReadRegisters(ThreadInfo* info, pid_t tid);
 };
 
 }  // namespace google_breakpad