Fix: get_cmdline_by_pid path length assumes a max pid of 65535

[lttng-tools.git] / include / lttng / constant.h

diff --git a/include/lttng/constant.h b/include/lttng/constant.h
index ed3ebe073b25c973495d059372a8a32e8ce091d9..10f1bf694503fc5e42d9a20632fb5c5c9c2fdce7 100644 (file)
--- a/include/lttng/constant.h
+++ b/include/lttng/constant.h
@@ -45,6 +45,13 @@
 /*
  * Event symbol length. Copied from LTTng kernel ABI.
  */
-#define LTTNG_SYMBOL_NAME_LEN             256
+#define LTTNG_SYMBOL_NAME_LEN                  256
+
+/*
+ * PROC(5) mentions that PID_MAX_LIMIT may not exceed 2^22 on 64-bit HW.
+ * We prefer to use 32-bits for simplicity's sake.
+ */
+#define LTTNG_MAX_PID                          INT32_MAX
+#define LTTNG_MAX_PID_STR                      "2147483647"
 
 #endif /* LTTNG_CONSTANT_H */