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| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-10-11 22:37:53 +0530 |
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| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-10-11 22:37:53 +0530 |
| commit | 10e1cf6b73f1598e57d24933a0949dbeffa2c8a0 (patch) | |
| tree | 2dd2ce2fe7144de439047f6dddbeb2f660746d94 /sysdeps/ieee754/dbl-64/s_atan.c | |
| parent | 3d110c7c6e6549bd4124fce49cdc672f9e449799 (diff) | |
| download | glibc-10e1cf6b73f1598e57d24933a0949dbeffa2c8a0.tar.gz glibc-10e1cf6b73f1598e57d24933a0949dbeffa2c8a0.tar.xz glibc-10e1cf6b73f1598e57d24933a0949dbeffa2c8a0.zip | |
Add systemtap markers to math function slow paths
Add systemtap probes to various slow paths in libm so that application developers may use systemtap to find out if their applications are hitting these slow paths. We have added probes for pow, exp, log, tan, atan and atan2.
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_atan.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_atan.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_atan.c b/sysdeps/ieee754/dbl-64/s_atan.c index 7b6c83ffb6..35ab5c1926 100644 --- a/sysdeps/ieee754/dbl-64/s_atan.c +++ b/sysdeps/ieee754/dbl-64/s_atan.c @@ -42,6 +42,7 @@ #include "uatan.tbl" #include "atnat.h" #include <math.h> +#include <stap-probe.h> void __mpatan (mp_no *, mp_no *, int); /* see definition in mpatan.c */ static double atanMp (double, const int[]); @@ -306,8 +307,12 @@ atanMp (double x, const int pr[]) __mp_dbl (&mpy1, &y1, p); __mp_dbl (&mpy2, &y2, p); if (y1 == y2) - return y1; + { + LIBC_PROBE (slowatan, 3, &p, &x, &y1); + return y1; + } } + LIBC_PROBE (slowatan_inexact, 3, &p, &x, &y1); return y1; /*if impossible to do exact computing */ } |