Tim Starling
99 linhas
3.0 KiB
C++
99 linhas
3.0 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#include "hphp/runtime/vm/debug/gdb-jit.h"
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#include "hphp/util/lock.h"
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#include "hphp/runtime/base/execution_context.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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using namespace HPHP;
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struct jit_descriptor __jit_debug_descriptor = { 1, 0, 0, 0 };
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void unregister_gdb_hook(struct jit_code_entry *e) {
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__jit_debug_descriptor.action_flag = JIT_UNREGISTER_FN;
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__jit_debug_descriptor.relevant_entry = e;
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__jit_debug_register_code();
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}
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void delete_symfile(const char *old) {
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struct jit_code_entry *e, *prev;
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e = __jit_debug_descriptor.first_entry;
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prev = nullptr;
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while (e != nullptr) {
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if (e->symfile_addr == old) {
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if (prev != nullptr) {
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prev->next_entry = e->next_entry;
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} else {
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__jit_debug_descriptor.first_entry = e->next_entry;
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}
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if (e->next_entry != nullptr) {
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e->next_entry->prev_entry = prev;
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}
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unregister_gdb_hook(e);
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free((void *)e->symfile_addr);
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free(e);
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return;
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}
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prev = e;
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e = e->next_entry;
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}
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}
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Mutex gdbLock;
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void unregister_gdb_chunk(DwarfChunk* d) {
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Lock lock(gdbLock);
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if (d->m_symfile != nullptr) {
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delete_symfile(d->m_symfile);
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d->m_symfile = nullptr;
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}
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}
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int register_gdb_hook(char *symfile_addr, uint64_t symfile_size,
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DwarfChunk* d) {
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struct jit_code_entry *entry;
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Lock lock(gdbLock);
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if ((entry =
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(struct jit_code_entry *)malloc(sizeof (struct jit_code_entry))) == nullptr)
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return -1;
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entry->symfile_addr = symfile_addr;
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entry->symfile_size = symfile_size;
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if (d->m_symfile != nullptr) {
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delete_symfile(d->m_symfile);
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}
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d->m_symfile = symfile_addr;
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entry->prev_entry = nullptr;
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entry->next_entry = __jit_debug_descriptor.first_entry;
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if (__jit_debug_descriptor.first_entry) {
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__jit_debug_descriptor.first_entry->prev_entry = entry;
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}
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__jit_debug_descriptor.first_entry = entry;
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__jit_debug_descriptor.relevant_entry = entry;
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__jit_debug_descriptor.action_flag = JIT_REGISTER_FN;
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__jit_debug_register_code();
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return 0;
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}
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