Break prof_accum into multiple compilation units.

Break prof_accum into multiple compilation units, in order to thwart
compiler optimizations such as inlining and tail call optimization that
would alter backtraces.

test/unit/prof_accum.c

@@ -1,9 +1,4 @@
-#include "test/jemalloc_test.h"
-
-#define	NTHREADS		4
-#define	NALLOCS_PER_THREAD	50
-#define	DUMP_INTERVAL		1
-#define	BT_COUNT_CHECK_INTERVAL	5
+#include "prof_accum.h"
 
 #ifdef JEMALLOC_PROF
 const char *malloc_conf =
@@ -21,37 +16,6 @@ prof_dump_open_intercept(bool propagate_err, const char *filename)
 	return (fd);
 }
 
-#define	alloc_n_proto(n)						\
-JEMALLOC_NOINLINE static void	*alloc_##n(unsigned bits);
-
-#define	alloc_n_gen(n)							\
-JEMALLOC_NOINLINE static void *						\
-alloc_##n(unsigned bits)						\
-{									\
-	void *p;							\
-									\
-	if (bits == 0)							\
-		p = mallocx(1, 0);					\
-	else {								\
-		switch (bits & 0x1U) {					\
-		case 0:							\
-			p = alloc_0(bits >> 1);				\
-			break;						\
-		case 1:							\
-			p = alloc_1(bits >> 1);				\
-			break;						\
-		default: not_reached();					\
-		}							\
-	}								\
-	/* Intentionally sabotage tail call optimization. */		\
-	assert_ptr_not_null(p, "Unexpected mallocx() failure");		\
-	return (p);							\
-}
-alloc_n_proto(0)
-alloc_n_proto(1)
-alloc_n_gen(0)
-alloc_n_gen(1)
-
 static void *
 alloc_from_permuted_backtrace(unsigned thd_ind, unsigned iteration)
 {

test/unit/prof_accum.h

@@ -0,0 +1,29 @@
+#include "test/jemalloc_test.h"
+
+#define	NTHREADS		4
+#define	NALLOCS_PER_THREAD	50
+#define	DUMP_INTERVAL		1
+#define	BT_COUNT_CHECK_INTERVAL	5
+
+#define	alloc_n_proto(n)						\
+void	*alloc_##n(unsigned bits);
+alloc_n_proto(0)
+alloc_n_proto(1)
+
+#define	alloc_n_gen(n)							\
+void *									\
+alloc_##n(unsigned bits)						\
+{									\
+									\
+	if (bits == 0) {						\
+		void *p = mallocx(1, 0);				\
+		assert_ptr_not_null(p, "Unexpected mallocx() failure");	\
+		return (p);						\
+	} else {							\
+		switch (bits & 0x1U) {					\
+		case 0: return (alloc_0(bits >> 1));			\
+		case 1: return (alloc_1(bits >> 1));			\
+		default: not_reached();					\
+		}							\
+	}								\
+}

test/unit/prof_accum_a.c

@@ -0,0 +1,3 @@
+#include "prof_accum.h"
+
+alloc_n_gen(0)

test/unit/prof_accum_b.c

@@ -0,0 +1,3 @@
+#include "prof_accum.h"
+
+alloc_n_gen(1)