Fix: define _LGPL_SOURCE in C files

[lttng-tools.git] / src / bin / lttng-sessiond / syscall.c

diff --git a/src/bin/lttng-sessiond/syscall.c b/src/bin/lttng-sessiond/syscall.c
index 95d30d07459dc98d12dfb2ca680f1773cdac7c52..eb81d67429a2d96ac6b062db40940988ad0dd58c 100644 (file)
--- a/src/bin/lttng-sessiond/syscall.c
+++ b/src/bin/lttng-sessiond/syscall.c
@@ -16,6 +16,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <common/bitfield.h>
 #include <common/common.h>
 #include <common/kernel-ctl/kernel-ctl.h>
@@ -35,7 +36,7 @@ static size_t syscall_table_nb_entry;
  * Populate the system call table using the kernel tracer.
  *
  * Return 0 on success and the syscall table is allocated. On error, a negative
- * value is returned and the syscall table is set to NULL.
+ * value is returned.
  */
 int syscall_init_table(void)
 {
@@ -81,7 +82,15 @@ int syscall_init_table(void)
                        size_t new_nbmem;
 
                        /* Double memory size. */
-                       new_nbmem = index << 1;
+                       new_nbmem = max(index, nbmem << 1);
+                       if (new_nbmem < nbmem) {
+                               /* Overflow, stop everything, something went really wrong. */
+                               ERR("Syscall listing memory size overflow. Stopping");
+                               free(syscall_table);
+                               syscall_table = NULL;
+                               ret = -EINVAL;
+                               goto error;
+                       }
 
                        DBG("Reallocating syscall table from %zu to %zu entries", nbmem,
                                        new_nbmem);