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Differential D1594 Diff 6800 source/lib/sysdep/os/unix/uvm.cpp

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source/lib/sysdep/os/unix/uvm.cpp

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static const int mmap_flags = MAP_PRIVATE|MAP_ANONYMOUS; static const int mmap_flags = MAP_PRIVATE|MAP_ANONYMOUS;
namespace vm { namespace vm {
void* ReserveAddressSpace(size_t size, size_t UNUSED(commitSize), PageType UNUSED(pageType), int UNUSED(prot)) void* ReserveAddressSpace(size_t size, size_t UNUSED(commitSize), PageType UNUSED(pageType), int UNUSED(prot))
{ {
errno = 0; errno = 0;
#if defined(__FreeBSD__)
void* p = mmap(0, size, PROT_NONE, mmap_flags, -1, 0);
#else
void* p = mmap(0, size, PROT_NONE, mmap_flags|MAP_NORESERVE, -1, 0); void* p = mmap(0, size, PROT_NONE, mmap_flags|MAP_NORESERVE, -1, 0);
#endif
if(p == MAP_FAILED) if(p == MAP_FAILED)
return 0; return 0;
return p; return p;
} }
void ReleaseAddressSpace(void* p, size_t size) void ReleaseAddressSpace(void* p, size_t size)
{ {
ENSURE(size != 0); ENSURE(size != 0);
Show All 20 Lines if(prot != (PROT_READ|PROT_WRITE))
(void)Protect(address, size, prot); (void)Protect(address, size, prot);
return true; return true;
} }
bool Decommit(uintptr_t address, size_t size) bool Decommit(uintptr_t address, size_t size)
{ {
errno = 0; errno = 0;
#if defined(__FreeBSD__)
if(mmap((void*)address, size, PROT_NONE, mmap_flags|MAP_FIXED, -1, 0) == MAP_FAILED)
#else
if(mmap((void*)address, size, PROT_NONE, mmap_flags|MAP_NORESERVE|MAP_FIXED, -1, 0) == MAP_FAILED) if(mmap((void*)address, size, PROT_NONE, mmap_flags|MAP_NORESERVE|MAP_FIXED, -1, 0) == MAP_FAILED)
#endif
return false; return false;
return true; return true;
} }
bool Protect(uintptr_t address, size_t size, int prot) bool Protect(uintptr_t address, size_t size, int prot)
{ {
errno = 0; errno = 0;
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