X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=src%2Flib%2Flttng-ust%2Flttng-ust-comm.c;h=2738959f1e29198d2d2f62bc13d68fb71e5fead6;hb=2fbda51c64f28b33b8febffc998af235e6fa9ea9;hp=2c902dc2737e922204628293e806306fa08e174a;hpb=c117e9884c3acc65408d8f65b2cd86a8511df1cc;p=lttng-ust.git

diff --git a/src/lib/lttng-ust/lttng-ust-comm.c b/src/lib/lttng-ust/lttng-ust-comm.c
index 2c902dc2..2738959f 100644
--- a/src/lib/lttng-ust/lttng-ust-comm.c
+++ b/src/lib/lttng-ust/lttng-ust-comm.c
@@ -2125,6 +2125,10 @@ void lttng_ust_check_soname_0(void)
  * Expose a canary symbol of the previous ABI to ensure we catch uses of a
  * liblttng-ust.so.0 dlopen'd after .so.1 has been loaded. Use a different
  * symbol than the detection code to ensure we don't detect ourself.
+ *
+ * This scheme will only work on systems where the global symbol table has
+ * priority when resolving the symbols of a dlopened shared object, which is
+ * the case on Linux but not on FreeBSD.
  */
 void init_usterr(void);
 void init_usterr(void)
@@ -2179,7 +2183,7 @@ void lttng_ust_ctor(void)
 	 * this library so it never becomes zero, thus never gets unloaded from the
 	 * address space of the process. Since we are already running in the
 	 * constructor of the LTTNG_UST_LIB_SONAME library, calling dlopen will
-	 * simply increment the refcount and no additionnal work is needed by the
+	 * simply increment the refcount and no additional work is needed by the
 	 * dynamic loader as the shared library is already loaded in the address
 	 * space. As a safe guard, we use the RTLD_NODELETE flag to prevent
 	 * unloading of the UST library if its refcount becomes zero (which should
@@ -2516,7 +2520,7 @@ void lttng_ust_after_fork_parent(sigset_t *restore_sigset)
 		return;
 	DBG("process %d", getpid());
 	lttng_ust_urcu_after_fork_parent();
-	/* Release mutexes and reenable signals */
+	/* Release mutexes and re-enable signals */
 	ust_after_fork_common(restore_sigset);
 }
 
@@ -2543,7 +2547,7 @@ void lttng_ust_after_fork_child(sigset_t *restore_sigset)
 	/* Release urcu mutexes */
 	lttng_ust_urcu_after_fork_child();
 	lttng_ust_cleanup(0);
-	/* Release mutexes and reenable signals */
+	/* Release mutexes and re-enable signals */
 	ust_after_fork_common(restore_sigset);
 	lttng_ust_ctor();
 }