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Fix DynafuncMaker::clear() and some other improvements.

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This commit is contained in:
King_DuckZ 2020-04-26 22:29:57 +02:00
parent 0545f26990
commit b5adc8156f
1 changed files with 12 additions and 3 deletions
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15
src/wren/dynafunc_maker.cpp
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@ -12,9 +12,14 @@
#include <string>
#include <cstdlib> //for aligned_alloc()
#include <sys/mman.h> //for mprotect()
#include <memory>
#include <new>
namespace wren {
namespace {
struct MemFree { void operator()(void* ptr) { std::free(ptr); }};
typedef std::unique_ptr<void, MemFree> unique_ptr_free_t;
//see src/dynafunc_amd64_gnu.asm
extern "C" const char g_dynafunc[];
extern "C" const char g_dynafunc_end[];
@ -75,13 +80,17 @@ namespace wren {
std::free(page);
}
m_pages.clear();
m_used_bytes = m_page_size;
}
unsigned char* DynafuncMaker::allocate_chunk() {
if (m_page_size - m_used_bytes < g_dynafunc_len) {
void* const page = std::aligned_alloc(m_page_size, m_page_size);
m_pages.push_back(page);
mprotect(page, m_page_size, PROT_EXEC | PROT_READ | PROT_WRITE);
unique_ptr_free_t page(std::aligned_alloc(m_page_size, m_page_size));
if (not page)
throw std::bad_alloc();
mprotect(page.get(), m_page_size, PROT_EXEC | PROT_READ | PROT_WRITE);
m_pages.push_back(page.get());
page.release();
m_used_bytes = 0;
}