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remove write function · python/cpython@fe6a0cb · GitHub

/ cpython Public

Commit fe6a0cb

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pablogsal
committed
remove write function
Signed-off-by: Pablo Galindo <pablogsal@gmail.com>
1 parent 4ffe070 commit fe6a0cb

2 files changed

Lines changed: 56 additions & 66 deletions

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‎Include/internal/pycore_remote_debug.h‎

Lines changed: 0 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -37,9 +37,6 @@ PyAPI_FUNC(uintptr_t) _Py_RemoteDebug_GetAsyncioDebugAddress(proc_handle_t *hand
3737
// Read memory from a remote process
3838
PyAPI_FUNC(int) _Py_RemoteDebug_ReadRemoteMemory(proc_handle_t *handle, uintptr_t remote_address, size_t len, void* dst);
3939

40-
// Write memory to a remote process
41-
PyAPI_FUNC(int) _Py_RemoteDebug_WriteRemoteMemory(proc_handle_t *handle, uintptr_t remote_address, size_t len, const void* src);
42-
4340
// Read debug offsets from a remote process
4441
PyAPI_FUNC(int) _Py_RemoteDebug_ReadDebugOffsets(proc_handle_t *handle, uintptr_t *runtime_start_address, _Py_DebugOffsets* debug_offsets);
4542

‎Python/remote_debugging.c‎

Lines changed: 56 additions & 63 deletions
Original file line numberDiff line numberDiff line change
@@ -80,7 +80,62 @@ read_memory(proc_handle_t *handle, uint64_t remote_address, size_t len, void* ds
8080
static int
8181
write_memory(proc_handle_t *handle, uintptr_t remote_address, size_t len, const void* src)
8282
{
83-
return _Py_RemoteDebug_WriteRemoteMemory(handle, remote_address, len, src);
83+
#ifdef MS_WINDOWS
84+
SIZE_T written = 0;
85+
SIZE_T result = 0;
86+
do {
87+
if (!WriteProcessMemory(handle->hProcess, (LPVOID)(remote_address + result), (const char*)src + result, len - result, &written)) {
88+
PyErr_SetFromWindowsErr(0);
89+
return -1;
90+
}
91+
result += written;
92+
} while (result < len);
93+
return 0;
94+
#elif defined(__linux__) && HAVE_PROCESS_VM_READV
95+
struct iovec local[1];
96+
struct iovec remote[1];
97+
Py_ssize_t result = 0;
98+
Py_ssize_t written = 0;
99+
100+
do {
101+
local[0].iov_base = (void*)((char*)src + result);
102+
local[0].iov_len = len - result;
103+
remote[0].iov_base = (void*)((char*)remote_address + result);
104+
remote[0].iov_len = len - result;
105+
106+
written = process_vm_writev(handle->pid, local, 1, remote, 1, 0);
107+
if (written < 0) {
108+
PyErr_SetFromErrno(PyExc_OSError);
109+
return -1;
110+
}
111+
112+
result += written;
113+
} while ((size_t)written != local[0].iov_len);
114+
return 0;
115+
#elif defined(__APPLE__) && TARGET_OS_OSX
116+
kern_return_t kr = mach_vm_write(
117+
pid_to_task(handle->pid),
118+
(mach_vm_address_t)remote_address,
119+
(vm_offset_t)src,
120+
(mach_msg_type_number_t)len);
121+
122+
if (kr != KERN_SUCCESS) {
123+
switch (kr) {
124+
case KERN_PROTECTION_FAILURE:
125+
PyErr_SetString(PyExc_PermissionError, "Not enough permissions to write memory");
126+
break;
127+
case KERN_INVALID_ARGUMENT:
128+
PyErr_SetString(PyExc_PermissionError, "Invalid argument to mach_vm_write");
129+
break;
130+
default:
131+
PyErr_Format(PyExc_RuntimeError, "Unknown error writing memory: %d", (int)kr);
132+
}
133+
return -1;
134+
}
135+
return 0;
136+
#else
137+
Py_UNREACHABLE();
138+
#endif
84139
}
85140

86141
static int
@@ -679,68 +734,6 @@ _Py_RemoteDebug_ReadRemoteMemory(proc_handle_t *handle, uintptr_t remote_address
679734
#endif
680735
}
681736

682-
// Platform-independent memory write function
683-
int
684-
_Py_RemoteDebug_WriteRemoteMemory(proc_handle_t *handle, uintptr_t remote_address, size_t len, const void* src)
685-
{
686-
#ifdef MS_WINDOWS
687-
SIZE_T written = 0;
688-
SIZE_T result = 0;
689-
do {
690-
if (!WriteProcessMemory(handle->hProcess, (LPVOID)(remote_address + result), (const char*)src + result, len - result, &written)) {
691-
PyErr_SetFromWindowsErr(0);
692-
return -1;
693-
}
694-
result += written;
695-
} while (result < len);
696-
return 0;
697-
#elif defined(__linux__) && HAVE_PROCESS_VM_READV
698-
struct iovec local[1];
699-
struct iovec remote[1];
700-
Py_ssize_t result = 0;
701-
Py_ssize_t written = 0;
702-
703-
do {
704-
local[0].iov_base = (void*)((char*)src + result);
705-
local[0].iov_len = len - result;
706-
remote[0].iov_base = (void*)((char*)remote_address + result);
707-
remote[0].iov_len = len - result;
708-
709-
written = process_vm_writev(handle->pid, local, 1, remote, 1, 0);
710-
if (written < 0) {
711-
PyErr_SetFromErrno(PyExc_OSError);
712-
return -1;
713-
}
714-
715-
result += written;
716-
} while ((size_t)written != local[0].iov_len);
717-
return 0;
718-
#elif defined(__APPLE__) && TARGET_OS_OSX
719-
kern_return_t kr = mach_vm_write(
720-
pid_to_task(handle->pid),
721-
(mach_vm_address_t)remote_address,
722-
(vm_offset_t)src,
723-
(mach_msg_type_number_t)len);
724-
725-
if (kr != KERN_SUCCESS) {
726-
switch (kr) {
727-
case KERN_PROTECTION_FAILURE:
728-
PyErr_SetString(PyExc_PermissionError, "Not enough permissions to write memory");
729-
break;
730-
case KERN_INVALID_ARGUMENT:
731-
PyErr_SetString(PyExc_PermissionError, "Invalid argument to mach_vm_write");
732-
break;
733-
default:
734-
PyErr_Format(PyExc_RuntimeError, "Unknown error writing memory: %d", (int)kr);
735-
}
736-
return -1;
737-
}
738-
return 0;
739-
#else
740-
Py_UNREACHABLE();
741-
#endif
742-
}
743-
744737
static int
745738
is_prerelease_version(uint64_t version)
746739
{

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