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Reduce number of jump-stubs on ARM64 via smaller preserved space #63842

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EgorBo wants to merge 4 commits into from
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Reduce number of jump-stubs on ARM64 via smaller preserved space #63842

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90e4d8e
Change CoreClrLibrarySize and MaxExecutableMemorySize on arm
EgorBo Jan 16, 2022
6e809fe
Smaller MaxExecutableMemorySize on arm64
EgorBo Jan 16, 2022
44ac2bc
Address feedback
EgorBo Jan 16, 2022
dc7ec53
Update executableallocator.cpp
EgorBo Jan 17, 2022
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Change CoreClrLibrarySize and MaxExecutableMemorySize on arm
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@EgorBo
EgorBo committed Jan 16, 2022
commit 90e4d8e92f5bd6797dc1023e5098738c3da2f3fc
6 changes: 6 additions & 0 deletions src/coreclr/pal/src/include/pal/virtual.h
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Expand Up @@ -180,6 +180,7 @@ class ExecutableMemoryAllocator
int32_t GenerateRandomStartOffset();

private:
#ifdef TARGET_XARCH
// There does not seem to be an easy way find the size of a library on Unix.
// So this constant represents an approximation of the libcoreclr size (on debug build)
// that can be used to calculate an approximate location of the memory that
Expand All @@ -191,6 +192,11 @@ class ExecutableMemoryAllocator
// will try to reserve during initialization. We want all JIT-ed code and the
// entire libcoreclr to be located in a 2GB range.
static const int32_t MaxExecutableMemorySize = 0x7FFF0000;
#else
static const int32_t CoreClrLibrarySize = 16 * 1024 * 1024;
static const int32_t MaxExecutableMemorySize = 128 * 1024 * 1024;
#endif

static const int32_t MaxExecutableMemorySizeNearCoreClr = MaxExecutableMemorySize - CoreClrLibrarySize;

// Start address of the reserved virtual address space
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