Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
/*
|
|
|
|
* Various trivial helper wrappers around standard functions
|
|
|
|
*/
|
|
|
|
#include "cache.h"
|
|
|
|
|
2010-03-24 20:22:34 +00:00
|
|
|
static void try_to_free_builtin(size_t size)
|
|
|
|
{
|
|
|
|
release_pack_memory(size, -1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void (*try_to_free_routine)(size_t size) = try_to_free_builtin;
|
|
|
|
|
2010-05-08 15:13:49 +00:00
|
|
|
try_to_free_t set_try_to_free_routine(try_to_free_t routine)
|
2010-03-24 20:22:34 +00:00
|
|
|
{
|
2010-05-08 15:13:49 +00:00
|
|
|
try_to_free_t old = try_to_free_routine;
|
|
|
|
try_to_free_routine = routine;
|
|
|
|
return old;
|
2010-03-24 20:22:34 +00:00
|
|
|
}
|
|
|
|
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
char *xstrdup(const char *str)
|
|
|
|
{
|
|
|
|
char *ret = strdup(str);
|
|
|
|
if (!ret) {
|
2010-03-24 20:22:34 +00:00
|
|
|
try_to_free_routine(strlen(str) + 1);
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
ret = strdup(str);
|
|
|
|
if (!ret)
|
|
|
|
die("Out of memory, strdup failed");
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void *xmalloc(size_t size)
|
|
|
|
{
|
|
|
|
void *ret = malloc(size);
|
|
|
|
if (!ret && !size)
|
|
|
|
ret = malloc(1);
|
|
|
|
if (!ret) {
|
2010-03-24 20:22:34 +00:00
|
|
|
try_to_free_routine(size);
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
ret = malloc(size);
|
|
|
|
if (!ret && !size)
|
|
|
|
ret = malloc(1);
|
|
|
|
if (!ret)
|
|
|
|
die("Out of memory, malloc failed");
|
|
|
|
}
|
|
|
|
#ifdef XMALLOC_POISON
|
|
|
|
memset(ret, 0xA5, size);
|
|
|
|
#endif
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-01-26 18:24:12 +00:00
|
|
|
void *xmallocz(size_t size)
|
|
|
|
{
|
|
|
|
void *ret;
|
|
|
|
if (size + 1 < size)
|
|
|
|
die("Data too large to fit into virtual memory space.");
|
|
|
|
ret = xmalloc(size + 1);
|
|
|
|
((char*)ret)[size] = 0;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
/*
|
|
|
|
* xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
|
|
|
|
* "data" to the allocated memory, zero terminates the allocated memory,
|
|
|
|
* and returns a pointer to the allocated memory. If the allocation fails,
|
|
|
|
* the program dies.
|
|
|
|
*/
|
|
|
|
void *xmemdupz(const void *data, size_t len)
|
|
|
|
{
|
2010-01-26 18:24:12 +00:00
|
|
|
return memcpy(xmallocz(len), data, len);
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
char *xstrndup(const char *str, size_t len)
|
|
|
|
{
|
|
|
|
char *p = memchr(str, '\0', len);
|
|
|
|
return xmemdupz(str, p ? p - str : len);
|
|
|
|
}
|
|
|
|
|
|
|
|
void *xrealloc(void *ptr, size_t size)
|
|
|
|
{
|
|
|
|
void *ret = realloc(ptr, size);
|
|
|
|
if (!ret && !size)
|
|
|
|
ret = realloc(ptr, 1);
|
|
|
|
if (!ret) {
|
2010-03-24 20:22:34 +00:00
|
|
|
try_to_free_routine(size);
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
ret = realloc(ptr, size);
|
|
|
|
if (!ret && !size)
|
|
|
|
ret = realloc(ptr, 1);
|
|
|
|
if (!ret)
|
|
|
|
die("Out of memory, realloc failed");
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void *xcalloc(size_t nmemb, size_t size)
|
|
|
|
{
|
|
|
|
void *ret = calloc(nmemb, size);
|
|
|
|
if (!ret && (!nmemb || !size))
|
|
|
|
ret = calloc(1, 1);
|
|
|
|
if (!ret) {
|
2010-03-24 20:22:34 +00:00
|
|
|
try_to_free_routine(nmemb * size);
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
ret = calloc(nmemb, size);
|
|
|
|
if (!ret && (!nmemb || !size))
|
|
|
|
ret = calloc(1, 1);
|
|
|
|
if (!ret)
|
|
|
|
die("Out of memory, calloc failed");
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void *xmmap(void *start, size_t length,
|
|
|
|
int prot, int flags, int fd, off_t offset)
|
|
|
|
{
|
|
|
|
void *ret = mmap(start, length, prot, flags, fd, offset);
|
|
|
|
if (ret == MAP_FAILED) {
|
|
|
|
if (!length)
|
|
|
|
return NULL;
|
|
|
|
release_pack_memory(length, fd);
|
|
|
|
ret = mmap(start, length, prot, flags, fd, offset);
|
|
|
|
if (ret == MAP_FAILED)
|
2009-06-27 15:58:46 +00:00
|
|
|
die_errno("Out of memory? mmap failed");
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* xread() is the same a read(), but it automatically restarts read()
|
|
|
|
* operations with a recoverable error (EAGAIN and EINTR). xread()
|
|
|
|
* DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
|
|
|
|
*/
|
|
|
|
ssize_t xread(int fd, void *buf, size_t len)
|
|
|
|
{
|
|
|
|
ssize_t nr;
|
|
|
|
while (1) {
|
|
|
|
nr = read(fd, buf, len);
|
|
|
|
if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
|
|
|
|
continue;
|
|
|
|
return nr;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* xwrite() is the same a write(), but it automatically restarts write()
|
|
|
|
* operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
|
|
|
|
* GUARANTEE that "len" bytes is written even if the operation is successful.
|
|
|
|
*/
|
|
|
|
ssize_t xwrite(int fd, const void *buf, size_t len)
|
|
|
|
{
|
|
|
|
ssize_t nr;
|
|
|
|
while (1) {
|
|
|
|
nr = write(fd, buf, len);
|
|
|
|
if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
|
|
|
|
continue;
|
|
|
|
return nr;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-20 23:13:05 +00:00
|
|
|
ssize_t read_in_full(int fd, void *buf, size_t count)
|
|
|
|
{
|
|
|
|
char *p = buf;
|
|
|
|
ssize_t total = 0;
|
|
|
|
|
|
|
|
while (count > 0) {
|
|
|
|
ssize_t loaded = xread(fd, p, count);
|
|
|
|
if (loaded <= 0)
|
|
|
|
return total ? total : loaded;
|
|
|
|
count -= loaded;
|
|
|
|
p += loaded;
|
|
|
|
total += loaded;
|
|
|
|
}
|
|
|
|
|
|
|
|
return total;
|
|
|
|
}
|
|
|
|
|
|
|
|
ssize_t write_in_full(int fd, const void *buf, size_t count)
|
|
|
|
{
|
|
|
|
const char *p = buf;
|
|
|
|
ssize_t total = 0;
|
|
|
|
|
|
|
|
while (count > 0) {
|
|
|
|
ssize_t written = xwrite(fd, p, count);
|
|
|
|
if (written < 0)
|
|
|
|
return -1;
|
|
|
|
if (!written) {
|
|
|
|
errno = ENOSPC;
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
count -= written;
|
|
|
|
p += written;
|
|
|
|
total += written;
|
|
|
|
}
|
|
|
|
|
|
|
|
return total;
|
|
|
|
}
|
|
|
|
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
int xdup(int fd)
|
|
|
|
{
|
|
|
|
int ret = dup(fd);
|
|
|
|
if (ret < 0)
|
2009-06-27 15:58:46 +00:00
|
|
|
die_errno("dup failed");
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
FILE *xfdopen(int fd, const char *mode)
|
|
|
|
{
|
|
|
|
FILE *stream = fdopen(fd, mode);
|
|
|
|
if (stream == NULL)
|
2009-06-27 15:58:46 +00:00
|
|
|
die_errno("Out of memory? fdopen failed");
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
return stream;
|
|
|
|
}
|
|
|
|
|
|
|
|
int xmkstemp(char *template)
|
|
|
|
{
|
|
|
|
int fd;
|
|
|
|
|
|
|
|
fd = mkstemp(template);
|
|
|
|
if (fd < 0)
|
2009-06-27 15:58:46 +00:00
|
|
|
die_errno("Unable to create temporary file");
|
Shrink the git binary a bit by avoiding unnecessary inline functions
So I was looking at the disgusting size of the git binary, and even with
the debugging removed, and using -Os instead of -O2, the size of the text
section was pretty high. In this day and age I guess almost a megabyte of
text isn't really all that surprising, but it still doesn't exactly make
me think "lean and mean".
With -Os, a surprising amount of text space is wasted on inline functions
that end up just being replicated multiple times, and where performance
really isn't a valid reason to inline them. In particular, the trivial
wrapper functions like "xmalloc()" are used _everywhere_, and making them
inline just duplicates the text (and the string we use to 'die()' on
failure) unnecessarily.
So this just moves them into a "wrapper.c" file, getting rid of a tiny bit
of unnecessary bloat. The following numbers are both with "CFLAGS=-Os":
Before:
[torvalds@woody git]$ size git
text data bss dec hex filename
700460 15160 292184 1007804 f60bc git
After:
[torvalds@woody git]$ size git
text data bss dec hex filename
670540 15160 292184 977884 eebdc git
so it saves almost 30k of text-space (it actually saves more than that
with the default -O2, but I don't think that's necessarily a very relevant
number from a "try to shrink git" standpoint).
It might conceivably have a performance impact, but none of this should be
_that_ performance critical. The real cost is not generally in the wrapper
anyway, but in the code it wraps (ie the cost of "xread()" is all in the
read itself, not in the trivial wrapping of it).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-22 19:19:25 +00:00
|
|
|
return fd;
|
|
|
|
}
|
2009-01-08 03:54:47 +00:00
|
|
|
|
2010-02-22 22:32:13 +00:00
|
|
|
int xmkstemp_mode(char *template, int mode)
|
|
|
|
{
|
|
|
|
int fd;
|
|
|
|
|
|
|
|
fd = git_mkstemp_mode(template, mode);
|
|
|
|
if (fd < 0)
|
|
|
|
die_errno("Unable to create temporary file");
|
|
|
|
return fd;
|
|
|
|
}
|
|
|
|
|
2009-01-08 03:54:47 +00:00
|
|
|
/*
|
|
|
|
* zlib wrappers to make sure we don't silently miss errors
|
|
|
|
* at init time.
|
|
|
|
*/
|
|
|
|
void git_inflate_init(z_streamp strm)
|
|
|
|
{
|
|
|
|
const char *err;
|
|
|
|
|
|
|
|
switch (inflateInit(strm)) {
|
|
|
|
case Z_OK:
|
|
|
|
return;
|
|
|
|
|
|
|
|
case Z_MEM_ERROR:
|
|
|
|
err = "out of memory";
|
|
|
|
break;
|
|
|
|
case Z_VERSION_ERROR:
|
|
|
|
err = "wrong version";
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
err = "error";
|
|
|
|
}
|
|
|
|
die("inflateInit: %s (%s)", err, strm->msg ? strm->msg : "no message");
|
|
|
|
}
|
|
|
|
|
|
|
|
void git_inflate_end(z_streamp strm)
|
|
|
|
{
|
|
|
|
if (inflateEnd(strm) != Z_OK)
|
|
|
|
error("inflateEnd: %s", strm->msg ? strm->msg : "failed");
|
|
|
|
}
|
|
|
|
|
|
|
|
int git_inflate(z_streamp strm, int flush)
|
|
|
|
{
|
|
|
|
int ret = inflate(strm, flush);
|
|
|
|
const char *err;
|
|
|
|
|
|
|
|
switch (ret) {
|
|
|
|
/* Out of memory is fatal. */
|
|
|
|
case Z_MEM_ERROR:
|
|
|
|
die("inflate: out of memory");
|
|
|
|
|
|
|
|
/* Data corruption errors: we may want to recover from them (fsck) */
|
|
|
|
case Z_NEED_DICT:
|
|
|
|
err = "needs dictionary"; break;
|
|
|
|
case Z_DATA_ERROR:
|
|
|
|
err = "data stream error"; break;
|
|
|
|
case Z_STREAM_ERROR:
|
|
|
|
err = "stream consistency error"; break;
|
|
|
|
default:
|
|
|
|
err = "unknown error"; break;
|
|
|
|
|
|
|
|
/* Z_BUF_ERROR: normal, needs more space in the output buffer */
|
|
|
|
case Z_BUF_ERROR:
|
|
|
|
case Z_OK:
|
|
|
|
case Z_STREAM_END:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
error("inflate: %s (%s)", err, strm->msg ? strm->msg : "no message");
|
|
|
|
return ret;
|
|
|
|
}
|
2009-02-25 22:48:30 +00:00
|
|
|
|
2009-02-25 07:11:29 +00:00
|
|
|
int odb_mkstemp(char *template, size_t limit, const char *pattern)
|
|
|
|
{
|
|
|
|
int fd;
|
2010-02-22 22:32:14 +00:00
|
|
|
/*
|
|
|
|
* we let the umask do its job, don't try to be more
|
|
|
|
* restrictive except to remove write permission.
|
|
|
|
*/
|
|
|
|
int mode = 0444;
|
2009-02-25 07:11:29 +00:00
|
|
|
snprintf(template, limit, "%s/%s",
|
|
|
|
get_object_directory(), pattern);
|
2010-02-22 22:32:14 +00:00
|
|
|
fd = git_mkstemp_mode(template, mode);
|
2009-02-25 07:11:29 +00:00
|
|
|
if (0 <= fd)
|
|
|
|
return fd;
|
|
|
|
|
|
|
|
/* slow path */
|
2009-02-26 15:31:52 +00:00
|
|
|
/* some mkstemp implementations erase template on failure */
|
2009-02-25 07:11:29 +00:00
|
|
|
snprintf(template, limit, "%s/%s",
|
|
|
|
get_object_directory(), pattern);
|
2009-02-26 15:31:52 +00:00
|
|
|
safe_create_leading_directories(template);
|
2010-02-22 22:32:14 +00:00
|
|
|
return xmkstemp_mode(template, mode);
|
2009-02-25 07:11:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
|
|
|
|
{
|
|
|
|
int fd;
|
|
|
|
|
|
|
|
snprintf(name, namesz, "%s/pack/pack-%s.keep",
|
|
|
|
get_object_directory(), sha1_to_hex(sha1));
|
|
|
|
fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
|
|
|
|
if (0 <= fd)
|
|
|
|
return fd;
|
|
|
|
|
|
|
|
/* slow path */
|
|
|
|
safe_create_leading_directories(name);
|
|
|
|
return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
|
|
|
|
}
|
2009-04-29 21:21:46 +00:00
|
|
|
|
2010-03-26 15:25:32 +00:00
|
|
|
static int warn_if_unremovable(const char *op, const char *file, int rc)
|
2009-04-29 21:21:46 +00:00
|
|
|
{
|
|
|
|
if (rc < 0) {
|
|
|
|
int err = errno;
|
|
|
|
if (ENOENT != err) {
|
2010-03-26 15:25:32 +00:00
|
|
|
warning("unable to %s %s: %s",
|
|
|
|
op, file, strerror(errno));
|
2009-04-29 21:21:46 +00:00
|
|
|
errno = err;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2010-03-26 15:25:32 +00:00
|
|
|
int unlink_or_warn(const char *file)
|
|
|
|
{
|
|
|
|
return warn_if_unremovable("unlink", file, unlink(file));
|
|
|
|
}
|
2010-03-26 15:25:33 +00:00
|
|
|
|
|
|
|
int rmdir_or_warn(const char *file)
|
|
|
|
{
|
|
|
|
return warn_if_unremovable("rmdir", file, rmdir(file));
|
|
|
|
}
|
2010-03-26 15:25:34 +00:00
|
|
|
|
|
|
|
int remove_or_warn(unsigned int mode, const char *file)
|
|
|
|
{
|
|
|
|
return S_ISGITLINK(mode) ? rmdir_or_warn(file) : unlink_or_warn(file);
|
|
|
|
}
|