liblttng-ust-ctl: Implement SIGBUS handling

[lttng-ust.git] / src / common / ringbuffer / ring_buffer_frontend.c

diff --git a/src/common/ringbuffer/ring_buffer_frontend.c b/src/common/ringbuffer/ring_buffer_frontend.c
index 924d685224d0b5df32affcb231fb4b5d8a0b8f47..4d06bf63140c6218c8abf7b278cd3f7b48026194 100644 (file)
--- a/src/common/ringbuffer/ring_buffer_frontend.c
+++ b/src/common/ringbuffer/ring_buffer_frontend.c
@@ -53,9 +53,9 @@
 #include "common/macros.h"
 
 #include <lttng/ust-utils.h>
-#include <lttng/ringbuffer-context.h>
+#include <lttng/ust-ringbuffer-context.h>
 
-#include "smp.h"
+#include "common/smp.h"
 #include "ringbuffer-config.h"
 #include "vatomic.h"
 #include "backend.h"
@@ -78,6 +78,8 @@
 /*
  * Non-static to ensure the compiler does not optimize away the xor.
  */
+uint8_t lttng_crash_magic_xor[]
+       __attribute__((visibility("hidden")));
 uint8_t lttng_crash_magic_xor[] = RB_CRASH_DUMP_ABI_MAGIC_XOR;
 
 /*
@@ -1180,7 +1182,8 @@ struct lttng_ust_ring_buffer *channel_get_ring_buffer(
                                        struct lttng_ust_shm_handle *handle,
                                        int *shm_fd, int *wait_fd,
                                        int *wakeup_fd,
-                                       uint64_t *memory_map_size)
+                                       uint64_t *memory_map_size,
+                                       void **memory_map_addr)
 {
        struct shm_ref *ref;
 
@@ -1196,6 +1199,7 @@ struct lttng_ust_ring_buffer *channel_get_ring_buffer(
        *wakeup_fd = shm_get_wakeup_fd(handle, ref);
        if (shm_get_shm_size(handle, ref, memory_map_size))
                return NULL;
+       *memory_map_addr = handle->table->objects[ref->index].memory_map;
        return shmp(handle, chan->backend.buf[cpu].shmp);
 }
 
@@ -2556,9 +2560,9 @@ void lib_ring_buffer_check_deliver_slow(const struct lttng_ust_ring_buffer_confi
 }
 
 /*
- * Force a read (imply TLS fixup for dlopen) of TLS variables.
+ * Force a read (imply TLS allocation for dlopen) of TLS variables.
  */
-void lttng_fixup_ringbuffer_tls(void)
+void lttng_ringbuffer_alloc_tls(void)
 {
        asm volatile ("" : : "m" (URCU_TLS(lib_ring_buffer_nesting)));
 }