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runtime: do not mark os memory as executable on windows

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R=golang-dev, bradfitz, khr
CC=golang-dev
https://golang.org/cl/9235046
This commit is contained in:
Alex Brainman 2013-05-17 13:37:30 +10:00
parent 50ba6e13b4
commit 28f74608b5
1 changed files with 5 additions and 4 deletions
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9
src/pkg/runtime/mem_windows.c
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@ -13,6 +13,7 @@ enum {
MEM_RESERVE = 0x2000, MEM_RESERVE = 0x2000,
MEM_RELEASE = 0x8000, MEM_RELEASE = 0x8000,
PAGE_READWRITE = 0x0004,
PAGE_EXECUTE_READWRITE = 0x40, PAGE_EXECUTE_READWRITE = 0x40,
}; };
@ -25,7 +26,7 @@ void*
runtime·SysAlloc(uintptr n) runtime·SysAlloc(uintptr n)
{ {
mstats.sys += n; mstats.sys += n;
return runtime·stdcall(runtime·VirtualAlloc, 4, nil, n, (uintptr)(MEM_COMMIT|MEM_RESERVE), (uintptr)PAGE_EXECUTE_READWRITE); return runtime·stdcall(runtime·VirtualAlloc, 4, nil, n, (uintptr)(MEM_COMMIT|MEM_RESERVE), (uintptr)PAGE_READWRITE);
} }
void void
@ -51,12 +52,12 @@ runtime·SysReserve(void *v, uintptr n)
{ {
// v is just a hint. // v is just a hint.
// First try at v. // First try at v.
v = runtime·stdcall(runtime·VirtualAlloc, 4, v, n, (uintptr)MEM_RESERVE, (uintptr)PAGE_EXECUTE_READWRITE); v = runtime·stdcall(runtime·VirtualAlloc, 4, v, n, (uintptr)MEM_RESERVE, (uintptr)PAGE_READWRITE);
if(v != nil) if(v != nil)
return v; return v;
// Next let the kernel choose the address. // Next let the kernel choose the address.
return runtime·stdcall(runtime·VirtualAlloc, 4, nil, n, (uintptr)MEM_RESERVE, (uintptr)PAGE_EXECUTE_READWRITE); return runtime·stdcall(runtime·VirtualAlloc, 4, nil, n, (uintptr)MEM_RESERVE, (uintptr)PAGE_READWRITE);
} }
void void
@ -65,7 +66,7 @@ runtime·SysMap(void *v, uintptr n)
void *p; void *p;
mstats.sys += n; mstats.sys += n;
p = runtime·stdcall(runtime·VirtualAlloc, 4, v, n, (uintptr)MEM_COMMIT, (uintptr)PAGE_EXECUTE_READWRITE); p = runtime·stdcall(runtime·VirtualAlloc, 4, v, n, (uintptr)MEM_COMMIT, (uintptr)PAGE_READWRITE);
if(p != v) if(p != v)
runtime·throw("runtime: cannot map pages in arena address space"); runtime·throw("runtime: cannot map pages in arena address space");
} }