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*: add optimization barrier to all "G trick" locations

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This commit is contained in:
Denis Vlasenko
2008-02-27 18:41:59 +00:00
parent fe66a0eca1
commit 574f2f4394
32 changed files with 97 additions and 64 deletions
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24
shell/ash.c
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@ -202,9 +202,8 @@ struct globals_misc {
/* indicates specified signal received */
char gotsig[NSIG - 1];
};
/* Make it reside in writable memory, yet make compiler understand that it is not going to change. */
static struct globals_misc *const ptr_to_globals_misc __attribute__ ((section (".data")));
#define G_misc (*ptr_to_globals_misc)
extern struct globals_misc *const ash_ptr_to_globals_misc;
#define G_misc (*ash_ptr_to_globals_misc)
#define rootpid (G_misc.rootpid )
#define shlvl (G_misc.shlvl )
#define minusc (G_misc.minusc )
@ -223,7 +222,8 @@ static struct globals_misc *const ptr_to_globals_misc __attribute__ ((section ("
#define sigmode (G_misc.sigmode )
#define gotsig (G_misc.gotsig )
#define INIT_G_misc() do { \
(*(struct globals_misc**)&ptr_to_globals_misc) = xzalloc(sizeof(G_misc)); \
(*(struct globals_misc**)&ash_ptr_to_globals_misc) = xzalloc(sizeof(G_misc)); \
barrier(); \
curdir = nullstr; \
physdir = nullstr; \
} while (0)
@ -1147,9 +1147,8 @@ struct globals_memstack {
int herefd; // = -1;
struct stack_block stackbase;
};
/* Make it reside in writable memory, yet make compiler understand that it is not going to change. */
static struct globals_memstack *const ptr_to_globals_memstack __attribute__ ((section (".data")));
#define G_memstack (*ptr_to_globals_memstack)
extern struct globals_memstack *const ash_ptr_to_globals_memstack;
#define G_memstack (*ash_ptr_to_globals_memstack)
#define g_stackp (G_memstack.g_stackp )
#define markp (G_memstack.markp )
#define g_stacknxt (G_memstack.g_stacknxt )
@ -1158,7 +1157,8 @@ static struct globals_memstack *const ptr_to_globals_memstack __attribute__ ((se
#define herefd (G_memstack.herefd )
#define stackbase (G_memstack.stackbase )
#define INIT_G_memstack() do { \
(*(struct globals_memstack**)&ptr_to_globals_memstack) = xzalloc(sizeof(G_memstack)); \
(*(struct globals_memstack**)&ash_ptr_to_globals_memstack) = xzalloc(sizeof(G_memstack)); \
barrier(); \
g_stackp = &stackbase; \
g_stacknxt = stackbase.space; \
g_stacknleft = MINSIZE; \
@ -1778,9 +1778,8 @@ struct globals_var {
struct var *vartab[VTABSIZE];
struct var varinit[ARRAY_SIZE(varinit_data)];
};
/* Make it reside in writable memory, yet make compiler understand that it is not going to change. */
static struct globals_var *const ptr_to_globals_var __attribute__ ((section (".data")));
#define G_var (*ptr_to_globals_var)
extern struct globals_var *const ash_ptr_to_globals_var;
#define G_var (*ash_ptr_to_globals_var)
#define shellparam (G_var.shellparam )
#define redirlist (G_var.redirlist )
#define g_nullredirs (G_var.g_nullredirs )
@ -1789,7 +1788,8 @@ static struct globals_var *const ptr_to_globals_var __attribute__ ((section (".d
#define varinit (G_var.varinit )
#define INIT_G_var() do { \
int i; \
(*(struct globals_var**)&ptr_to_globals_var) = xzalloc(sizeof(G_var)); \
(*(struct globals_var**)&ash_ptr_to_globals_var) = xzalloc(sizeof(G_var)); \
barrier(); \
for (i = 0; i < ARRAY_SIZE(varinit_data); i++) { \
varinit[i].flags = varinit_data[i].flags; \
varinit[i].text = varinit_data[i].text; \