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runtime: mark sysAlloc nosplit

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sysAlloc is the only mem function called from Go.

LGTM=iant, khr
R=golang-codereviews, khr, 0intro, iant
CC=dvyukov, golang-codereviews, r
https://golang.org/cl/139210043
This commit is contained in:
Russ Cox 2014-09-04 21:12:48 -04:00
parent db58ab96fa
commit 99a08262af
10 changed files with 46 additions and 4 deletions
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2
src/pkg/runtime/mem_darwin.c
View File

@ -7,7 +7,9 @@
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "malloc.h"
#include "../../cmd/ld/textflag.h"
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{

2
src/pkg/runtime/mem_dragonfly.c
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@ -7,12 +7,14 @@
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "malloc.h"
#include "textflag.h"
enum
{
ENOMEM = 12,
};
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{

2
src/pkg/runtime/mem_freebsd.c
View File

@ -7,12 +7,14 @@
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "malloc.h"
#include "textflag.h"
enum
{
ENOMEM = 12,
};
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{

2
src/pkg/runtime/mem_linux.c
View File

@ -7,6 +7,7 @@
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "malloc.h"
#include "../../cmd/ld/textflag.h"
enum
{
@ -57,6 +58,7 @@ mmap_fixed(byte *v, uintptr n, int32 prot, int32 flags, int32 fd, uint32 offset)
return p;
}
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{

2
src/pkg/runtime/mem_nacl.c
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@ -7,12 +7,14 @@
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "malloc.h"
#include "../../cmd/ld/textflag.h"
enum
{
Debug = 0,
};
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{

2
src/pkg/runtime/mem_netbsd.c
View File

@ -7,12 +7,14 @@
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "malloc.h"
#include "../../cmd/ld/textflag.h"
enum
{
ENOMEM = 12,
};
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{

2
src/pkg/runtime/mem_openbsd.c
View File

@ -7,12 +7,14 @@
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "malloc.h"
#include "../../cmd/ld/textflag.h"
enum
{
ENOMEM = 12,
};
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{

32
src/pkg/runtime/mem_plan9.c
View File

@ -7,6 +7,7 @@
#include "arch_GOARCH.h"
#include "malloc.h"
#include "os_GOOS.h"
#include "../../cmd/ld/textflag.h"
extern byte runtime·end[];
static byte *bloc = { runtime·end };
@ -31,18 +32,41 @@ brk(uintptr nbytes)
}
bloc = (byte*)bl + nbytes;
runtime·unlock(&memlock);
return (void*)bl;
return (void*)bl;
}
void*
runtime·sysAlloc(uintptr nbytes, uint64 *stat)
static void
sysalloc(void)
{
uintptr nbytes;
uint64 *stat;
void *p;
nbytes = g->m->scalararg[0];
stat = g->m->ptrarg[0];
g->m->scalararg[0] = 0;
g->m->ptrarg[0] = nil;
p = brk(nbytes);
if(p != nil)
runtime·xadd64(stat, nbytes);
g->m->ptrarg[0] = p;
}
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr nbytes, uint64 *stat)
{
void (*fn)(void);
void *p;
g->m->scalararg[0] = nbytes;
g->m->ptrarg[0] = stat;
fn = sysalloc;
runtime·onM(&fn);
p = g->m->ptrarg[0];
g->m->ptrarg[0] = nil;
return p;
}

2
src/pkg/runtime/mem_solaris.c
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@ -7,12 +7,14 @@
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "malloc.h"
#include "../../cmd/ld/textflag.h"
enum
{
ENOMEM = 12,
};
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{

2
src/pkg/runtime/mem_windows.c
View File

@ -7,6 +7,7 @@
#include "os_GOOS.h"
#include "defs_GOOS_GOARCH.h"
#include "malloc.h"
#include "../../cmd/ld/textflag.h"
enum {
MEM_COMMIT = 0x1000,
@ -25,6 +26,7 @@ extern void *runtime·VirtualAlloc;
extern void *runtime·VirtualFree;
extern void *runtime·VirtualProtect;
#pragma textflag NOSPLIT
void*
runtime·sysAlloc(uintptr n, uint64 *stat)
{