Added the per-thread property 'on_alt_stack'.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11326

diff --git a/drd/drd_thread.c b/drd/drd_thread.c
index f9edc6a06a46e849d017616c774c442369ed83e3..f10f077de08f80d89e2747121c02fc33123f0615 100644 (file)
--- a/drd/drd_thread.c
+++ b/drd/drd_thread.c
@@ -181,6 +181,7 @@ static DrdThreadId DRD_(VgThreadIdToNewDrdThreadId)(const ThreadId tid)
          DRD_(g_threadinfo)[i].stack_startup = 0;
          DRD_(g_threadinfo)[i].stack_max     = 0;
          DRD_(thread_set_name)(i, "");
+         DRD_(g_threadinfo)[i].on_alt_stack        = False;
          DRD_(g_threadinfo)[i].is_recording_loads  = True;
          DRD_(g_threadinfo)[i].is_recording_stores = True;
          DRD_(g_threadinfo)[i].pthread_create_nesting_level = 0;
@@ -420,6 +421,31 @@ SizeT DRD_(thread_get_stack_size)(const DrdThreadId tid)
    return DRD_(g_threadinfo)[tid].stack_size;
 }
 
+Bool DRD_(thread_get_on_alt_stack)(const DrdThreadId tid)
+{
+   tl_assert(0 <= (int)tid && tid < DRD_N_THREADS
+             && tid != DRD_INVALID_THREADID);
+   return DRD_(g_threadinfo)[tid].on_alt_stack;
+}
+
+void DRD_(thread_set_on_alt_stack)(const DrdThreadId tid,
+                                   const Bool on_alt_stack)
+{
+   tl_assert(0 <= (int)tid && tid < DRD_N_THREADS
+             && tid != DRD_INVALID_THREADID);
+   tl_assert(on_alt_stack == !!on_alt_stack);
+   DRD_(g_threadinfo)[tid].on_alt_stack = on_alt_stack;
+}
+
+Int DRD_(thread_get_threads_on_alt_stack)(void)
+{
+   int i, n = 0;
+
+   for (i = 1; i < DRD_N_THREADS; i++)
+      n += DRD_(g_threadinfo)[i].on_alt_stack;
+   return n;
+}
+
 /**
  * Clean up thread-specific data structures. Call this just after
  * pthread_join().

diff --git a/drd/drd_thread.h b/drd/drd_thread.h
index d9651393e7327a25bdfc7fc0c7bf9ac28d78e22b..e0eb52a55aad8785598063d5bb434623357bbbf7 100644 (file)
--- a/drd/drd_thread.h
+++ b/drd/drd_thread.h
@@ -77,6 +77,7 @@ typedef struct
    Addr      stack_max;     /**< Top of stack. */
    SizeT     stack_size;    /**< Maximum size of stack. */
    char      name[64];      /**< User-assigned thread name. */
+   Bool      on_alt_stack;
    /** Indicates whether the Valgrind core knows about this thread. */
    Bool      vg_thread_exists;
    /** Indicates whether there is an associated POSIX thread ID. */
@@ -142,6 +143,10 @@ Addr DRD_(thread_get_stack_min)(const DrdThreadId tid);
 Addr DRD_(thread_get_stack_min_min)(const DrdThreadId tid);
 Addr DRD_(thread_get_stack_max)(const DrdThreadId tid);
 SizeT DRD_(thread_get_stack_size)(const DrdThreadId tid);
+Bool DRD_(thread_get_on_alt_stack)(const DrdThreadId tid);
+void DRD_(thread_set_on_alt_stack)(const DrdThreadId tid,
+                                   const Bool on_alt_stack);
+Int DRD_(thread_get_threads_on_alt_stack)(void);
 void DRD_(thread_set_pthreadid)(const DrdThreadId tid, const PThreadId ptid);
 Bool DRD_(thread_get_joinable)(const DrdThreadId tid);
 void DRD_(thread_set_joinable)(const DrdThreadId tid, const Bool joinable);