gmon: improve mcount overflow handling [BZ# 27576]

[thirdparty/glibc.git] / gmon / mcount.c

diff --git a/gmon/mcount.c b/gmon/mcount.c
index 9d4a1a50fa6ab21af97293c4ec59a199c06f0a5d..f7180fdb83399a1426b64fbe23b385d4f10255b9 100644 (file)
--- a/gmon/mcount.c
+++ b/gmon/mcount.c
@@ -41,6 +41,10 @@ static char sccsid[] = "@(#)mcount.c 8.1 (Berkeley) 6/4/93";
 
 #include <atomic.h>
 
+#include <not-cancel.h>
+#include <unistd.h>
+#define ERR(s) __write_nocancel (STDERR_FILENO, s, sizeof (s) - 1)
+
 /*
  * mcount is called on entry to each function compiled with the profiling
  * switch set.  _mcount(), which is declared in a machine-dependent way
@@ -170,6 +174,7 @@ done:
        return;
 overflow:
        p->state = GMON_PROF_ERROR;
+       ERR("mcount: call graph buffer size limit exceeded, gmon.out will not be generated\n");
        return;
 }