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JitCodeBuffer: Expose FlushInstructionCache() to callers

This commit is contained in:
Connor McLaughlin 2019-12-20 21:23:52 +10:00
parent 1de096224c
commit decf416aee
2 changed files with 16 additions and 12 deletions
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25
src/common/jit_code_buffer.cpp
View File

@ -7,16 +7,6 @@
#include <sys/mman.h>
#endif
static void DoCacheFlush(u8* address, u32 len)
{
#if defined(Y_PLATFORM_WINDOWS)
FlushInstructionCache(GetCurrentProcess(), address, len);
#elif defined(Y_COMPILER_GCC) || defined(Y_COMPILER_CLANG)
__builtin___clear_cache(reinterpret_cast<char*>(address), reinterpret_cast<char*>(address + len));
#else
#error Unknown platform.
#endif
}
JitCodeBuffer::JitCodeBuffer(u32 size /* = 64 * 1024 * 1024 */, u32 far_code_size /* = 0 */)
{
@ -85,11 +75,11 @@ void JitCodeBuffer::CommitFarCode(u32 length)
void JitCodeBuffer::Reset()
{
std::memset(m_code_ptr, 0, m_code_size);
DoCacheFlush(m_code_ptr, m_code_size);
FlushInstructionCache(m_code_ptr, m_code_size);
if (m_far_code_size > 0)
{
std::memset(m_far_code_ptr, 0, m_far_code_size);
DoCacheFlush(m_far_code_ptr, m_far_code_size);
FlushInstructionCache(m_far_code_ptr, m_far_code_size);
}
m_free_code_ptr = m_code_ptr;
m_code_used = 0;
@ -109,3 +99,14 @@ void JitCodeBuffer::Align(u32 alignment, u8 padding_value)
m_free_code_ptr += num_padding_bytes;
m_code_used += num_padding_bytes;
}
void JitCodeBuffer::FlushInstructionCache(void* address, u32 size)
{
#if defined(Y_PLATFORM_WINDOWS)
::FlushInstructionCache(GetCurrentProcess(), address, size);
#elif defined(Y_COMPILER_GCC) || defined(Y_COMPILER_CLANG)
__builtin___clear_cache(reinterpret_cast<char*>(address), reinterpret_cast<char*>(address + size));
#else
#error Unknown platform.
#endif
}

3
src/common/jit_code_buffer.h
View File

@ -21,6 +21,9 @@ public:
/// Assumes alignment is a power-of-two.
void Align(u32 alignment, u8 padding_value);
/// Flushes the instruction cache on the host for the specified range.
static void FlushInstructionCache(void* address, u32 size);
private:
u8* m_code_ptr;
u8* m_free_code_ptr;