9053767330
We dropped downstream support for Python 2 in the previous release. Now that we have branched for the next release the window where this kind of change could introduce conflicts is closing too. Start by getting rid of Python 2 support in the Script Interpreter plugin. Differential revision: https://reviews.llvm.org/D124429
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
#include "PythonReadline.h"
|
|
|
|
#ifdef LLDB_USE_LIBEDIT_READLINE_COMPAT_MODULE
|
|
|
|
#include <cstdio>
|
|
|
|
#include <editline/readline.h>
|
|
|
|
// 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.
|
|
//
|
|
// Bug on the cpython side: https://bugs.python.org/issue38634
|
|
|
|
PyDoc_STRVAR(moduleDocumentation,
|
|
"Simple readline module implementation based on libedit.");
|
|
|
|
static struct PyModuleDef readline_module = {
|
|
PyModuleDef_HEAD_INIT, // m_base
|
|
"lldb_editline", // m_name
|
|
moduleDocumentation, // m_doc
|
|
-1, // m_size
|
|
nullptr, // m_methods
|
|
nullptr, // m_reload
|
|
nullptr, // m_traverse
|
|
nullptr, // m_clear
|
|
nullptr, // m_free
|
|
};
|
|
|
|
static char *simple_readline(FILE *stdin, FILE *stdout, const char *prompt) {
|
|
rl_instream = stdin;
|
|
rl_outstream = stdout;
|
|
char *line = readline(prompt);
|
|
if (!line) {
|
|
char *ret = (char *)PyMem_RawMalloc(1);
|
|
if (ret != NULL)
|
|
*ret = '\0';
|
|
return ret;
|
|
}
|
|
if (*line)
|
|
add_history(line);
|
|
int n = strlen(line);
|
|
char *ret = (char *)PyMem_RawMalloc(n + 2);
|
|
if (ret) {
|
|
memcpy(ret, line, n);
|
|
free(line);
|
|
ret[n] = '\n';
|
|
ret[n + 1] = '\0';
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
PyMODINIT_FUNC initlldb_readline(void) {
|
|
PyOS_ReadlineFunctionPointer = simple_readline;
|
|
|
|
return PyModule_Create(&readline_module);
|
|
}
|
|
#endif
|