fluencelabs/wasmer
1
0
Fork 0
mirror of https://github.com/fluencelabs/wasmer synced 2025-06-13 00:51:20 +00:00
Code Issues Projects Releases Wiki Activity

Merge branch 'fix/llvm-trap-windows' into feature/llvm-osr

Browse Source
This commit is contained in:
losfair
2019-08-21 15:02:17 -07:00
parent bf9d915635 b113f5a24b
commit 74faaa3be8
2 changed files with 61 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
lib/llvm-backend/cpp/object_loader.cpp
View File

@ -1,6 +1,7 @@
#include "object_loader.hh"
#include <iostream>
#include <memory>
#include <setjmp.h>
extern "C" void __register_frame(uint8_t *);
extern "C" void __deregister_frame(uint8_t *);
@ -12,6 +13,54 @@ MemoryManager::~MemoryManager() {
callbacks.dealloc_memory(read_section.base, read_section.size);
callbacks.dealloc_memory(readwrite_section.base, readwrite_section.size);
}
void unwinding_setjmp(jmp_buf stack_out, void (*func)(void *), void *userdata) {
if(setjmp(stack_out)) {
} else {
func(userdata);
}
}
[[noreturn]]
void unwinding_longjmp(jmp_buf stack_in) {
longjmp(stack_in, 42);
}
struct UnwindPoint {
UnwindPoint *prev;
jmp_buf stack;
std::function<void()> *f;
std::unique_ptr<std::exception> exception;
};
static thread_local UnwindPoint *unwind_state = nullptr;
static void unwind_payload(void *_point) {
UnwindPoint *point = (UnwindPoint *) _point;
(*point->f)();
}
void catch_unwind(std::function<void()>&& f) {
UnwindPoint current;
current.prev = unwind_state;
current.f = &f;
unwind_state = &current;
unwinding_setjmp(current.stack, unwind_payload, (void *) &current);
if(current.exception) {
throw *current.exception;
}
}
void unsafe_unwind(std::exception *exception) {
UnwindPoint *state = unwind_state;
if(state) {
state->exception.reset(exception);
unwinding_longjmp(state->stack);
} else {
abort();
}
}
uint8_t *MemoryManager::allocateCodeSection(uintptr_t size, unsigned alignment,
unsigned section_id,