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Diffstat (limited to 'REORG.TODO/csu/gmon-start.c')
-rw-r--r-- | REORG.TODO/csu/gmon-start.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/REORG.TODO/csu/gmon-start.c b/REORG.TODO/csu/gmon-start.c new file mode 100644 index 0000000000..a1f92d5e1a --- /dev/null +++ b/REORG.TODO/csu/gmon-start.c @@ -0,0 +1,92 @@ +/* Code to enable profiling at program startup. + Copyright (C) 1995-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The GNU Lesser General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + Note that people who make modified versions of this file are not + obligated to grant this special exception for their modified + versions; it is their choice whether to do so. The GNU Lesser + General Public License gives permission to release a modified + version without this exception; this exception also makes it + possible to release a modified version which carries forward this + exception. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sys/types.h> +#include <sys/gmon.h> +#include <stdlib.h> +#include <unistd.h> +#define __ASSEMBLY__ +#include <entry.h> + +/* Beginning and end of our code segment. We cannot declare them + as the external functions since we want the addresses of those + labels. Taking the address of a function may have different + meanings on different platforms. */ +#ifdef ENTRY_POINT_DECL +ENTRY_POINT_DECL(extern) +#else +extern char ENTRY_POINT[]; +#endif +extern char etext[]; + +#ifndef TEXT_START +# ifdef ENTRY_POINT_DECL +# define TEXT_START ENTRY_POINT +# else +# define TEXT_START &ENTRY_POINT +# endif +#endif + +#ifdef GMON_START_ARRAY_SECTION +static void __gmon_start__ (void); +static void (*const gmon_start_initializer) (void) + __attribute__ ((used, section (GMON_START_ARRAY_SECTION))) = &__gmon_start__; +static +#else +/* We cannot use the normal constructor mechanism to call + __gmon_start__ because gcrt1.o appears before crtbegin.o in the link. + Instead crti.o calls it specially. */ +extern void __gmon_start__ (void); +#endif + +void +__gmon_start__ (void) +{ + /* Protect from being called more than once. Since crti.o is linked + into every shared library, each of their init functions will call us. */ + static int called; + + if (called) + return; + + called = 1; + + /* Start keeping profiling records. */ + __monstartup ((u_long) TEXT_START, (u_long) &etext); + + /* Call _mcleanup before exiting; it will write out gmon.out from the + collected data. */ + atexit (&_mcleanup); +} |