From: Eugene Loh <eugene.loh@oracle>
Date: Thu, 7 Sep 2017 15:40:16 +0000 (-0700)
Subject: dtrace: implement tracemem optional third arg (dyn size)
X-Git-Tag: v4.1.12-111.0.20170918_2215~182^2~3
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=78ac89eca9304be623d4ec6fb89bef950162a171;p=users%2Fjedix%2Flinux-maple.git

dtrace: implement tracemem optional third arg (dyn size)

Solaris DTrace added a third, optional argument, dynamic size.
Here we implement this for Linux, including introducing the
new user-visible arguments
DTRACE_TRACEMEM_STATIC
DTRACE_TRACEMEM_DYNAMIC
DTRACE_TRACEMEM_SIZE
DTRACE_TRACEMEM_SSIZE
as well as refactoring the
dt_print_bytes() raw label, making it its own function
dt_print_rawbytes().

Orabug: 26223475

Signed-off-by: Eugene Loh <eugene.loh@oracle.com>
Reviewed-by: Tomas Jedlicka <tomas.jedlicka@oracle.com>
---

diff --git a/dtrace/dtrace_ecb.c b/dtrace/dtrace_ecb.c
index 68e2e54bb5abd..52b04badc3f03 100644
--- a/dtrace/dtrace_ecb.c
+++ b/dtrace/dtrace_ecb.c
@@ -257,6 +257,7 @@ static int dtrace_ecb_action_add(dtrace_ecb_t *ecb, dtrace_actdesc_t *desc)
 						state, (char *)(uintptr_t)arg);
 			}
 
+		case DTRACEACT_TRACEMEM:
 		case DTRACEACT_LIBACT:
 		case DTRACEACT_DIFEXPR:
 			if (dp == NULL)
diff --git a/dtrace/dtrace_probe.c b/dtrace/dtrace_probe.c
index 7b97f55f04469..2a107b81542b0 100644
--- a/dtrace/dtrace_probe.c
+++ b/dtrace/dtrace_probe.c
@@ -996,6 +996,7 @@ void dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
 			case DTRACEACT_PRINTA:
 			case DTRACEACT_SYSTEM:
 			case DTRACEACT_FREOPEN:
+			case DTRACEACT_TRACEMEM:
 				break;
 
 			case DTRACEACT_SYM:
diff --git a/include/uapi/linux/dtrace/actions_defines.h b/include/uapi/linux/dtrace/actions_defines.h
index 57306f8f16aaf..6d4dda8a1705c 100644
--- a/include/uapi/linux/dtrace/actions_defines.h
+++ b/include/uapi/linux/dtrace/actions_defines.h
@@ -34,6 +34,7 @@
 #define	DTRACEACT_PRINTF		3	/* printf() action */
 #define	DTRACEACT_PRINTA		4	/* printa() action */
 #define	DTRACEACT_LIBACT		5	/* library-controlled action */
+#define	DTRACEACT_TRACEMEM		6	/* tracemem() action */
 
 #define DTRACEACT_PROC			0x0100
 #define DTRACEACT_USTACK		(DTRACEACT_PROC + 1)