forked from OSchip/llvm-project
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
// NOTE: Since Python may define some pre-processor definitions which affect the
|
|
// standard headers on some systems, you must include Python.h before any
|
|
// standard headers are included.
|
|
#include "Python.h"
|
|
|
|
#include <stdio.h>
|
|
|
|
#ifndef LLDB_DISABLE_LIBEDIT
|
|
#include <editline/readline.h>
|
|
#endif
|
|
|
|
// Simple implementation of the Python readline module using libedit.
|
|
// In the event that libedit is excluded from the build, this turns
|
|
// back into a null implementation that blocks the module from pulling
|
|
// in the GNU readline shared lib, which causes linkage confusion when
|
|
// both readline and libedit's readline compatibility symbols collide.
|
|
//
|
|
// Currently it only installs a PyOS_ReadlineFunctionPointer, without
|
|
// implementing any of the readline module methods. This is meant to
|
|
// work around LLVM pr18841 to avoid seg faults in the stock Python
|
|
// readline.so linked against GNU readline.
|
|
|
|
#ifndef LLDB_DISABLE_LIBEDIT
|
|
PyDoc_STRVAR(moduleDocumentation,
|
|
"Simple readline module implementation based on libedit.");
|
|
#else
|
|
PyDoc_STRVAR(moduleDocumentation,
|
|
"Stub module meant to avoid linking GNU readline.");
|
|
#endif
|
|
|
|
#if PY_MAJOR_VERSION >= 3
|
|
static struct PyModuleDef readline_module = {
|
|
PyModuleDef_HEAD_INIT, // m_base
|
|
"readline", // m_name
|
|
moduleDocumentation, // m_doc
|
|
-1, // m_size
|
|
nullptr, // m_methods
|
|
nullptr, // m_reload
|
|
nullptr, // m_traverse
|
|
nullptr, // m_clear
|
|
nullptr, // m_free
|
|
};
|
|
#else
|
|
static struct PyMethodDef moduleMethods[] = {{nullptr, nullptr, 0, nullptr}};
|
|
#endif
|
|
|
|
#ifndef LLDB_DISABLE_LIBEDIT
|
|
static char *
|
|
#if PY_MAJOR_VERSION >= 3
|
|
simple_readline(FILE *stdin, FILE *stdout, const char *prompt)
|
|
#else
|
|
simple_readline(FILE *stdin, FILE *stdout, char *prompt)
|
|
#endif
|
|
{
|
|
rl_instream = stdin;
|
|
rl_outstream = stdout;
|
|
char *line = readline(prompt);
|
|
if (!line) {
|
|
char *ret = (char *)PyMem_Malloc(1);
|
|
if (ret != NULL)
|
|
*ret = '\0';
|
|
return ret;
|
|
}
|
|
if (*line)
|
|
add_history(line);
|
|
int n = strlen(line);
|
|
char *ret = (char *)PyMem_Malloc(n + 2);
|
|
strncpy(ret, line, n);
|
|
free(line);
|
|
ret[n] = '\n';
|
|
ret[n + 1] = '\0';
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
PyMODINIT_FUNC initreadline(void) {
|
|
#ifndef LLDB_DISABLE_LIBEDIT
|
|
PyOS_ReadlineFunctionPointer = simple_readline;
|
|
#endif
|
|
|
|
#if PY_MAJOR_VERSION >= 3
|
|
return PyModule_Create(&readline_module);
|
|
#else
|
|
Py_InitModule4("readline", moduleMethods, moduleDocumentation,
|
|
static_cast<PyObject *>(NULL), PYTHON_API_VERSION);
|
|
#endif
|
|
}
|