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-rwxr-xr-xtools/codegen/core/gen_static_metadata.py215
1 files changed, 186 insertions, 29 deletions
diff --git a/tools/codegen/core/gen_static_metadata.py b/tools/codegen/core/gen_static_metadata.py
index cf3762dbb8..0374cf75a1 100755
--- a/tools/codegen/core/gen_static_metadata.py
+++ b/tools/codegen/core/gen_static_metadata.py
@@ -31,8 +31,12 @@
import hashlib
import itertools
+import collections
import os
import sys
+import subprocess
+import re
+import perfection
# configuration: a list of either strings or 2-tuples of strings
# a single string represents a static grpc_mdstr
@@ -40,6 +44,8 @@ import sys
# also be created)
CONFIG = [
+ # metadata strings
+ 'host',
'grpc-timeout',
'grpc-internal-encoding-request',
'grpc-payload-bin',
@@ -48,12 +54,19 @@ CONFIG = [
'grpc-accept-encoding',
'user-agent',
':authority',
- 'host',
'grpc-message',
'grpc-status',
'grpc-tracing-bin',
'grpc-stats-bin',
'',
+ # channel arg keys
+ 'grpc.wait_for_ready',
+ 'grpc.timeout',
+ 'grpc.max_request_message_bytes',
+ 'grpc.max_response_message_bytes',
+ # well known method names
+ '/grpc.lb.v1.LoadBalancer/BalanceLoad',
+ # metadata elements
('grpc-status', '0'),
('grpc-status', '1'),
('grpc-status', '2'),
@@ -130,6 +143,26 @@ CONFIG = [
('www-authenticate', ''),
]
+METADATA_BATCH_CALLOUTS = [
+ ':path',
+ ':method',
+ ':status',
+ ':authority',
+ ':scheme',
+ 'te',
+ 'grpc-message',
+ 'grpc-status',
+ 'grpc-payload-bin',
+ 'grpc-encoding',
+ 'grpc-accept-encoding',
+ 'content-type',
+ 'grpc-internal-encoding-request',
+ 'user-agent',
+ 'host',
+ 'lb-token',
+ 'lb-cost-bin',
+]
+
COMPRESSION_ALGORITHMS = [
'identity',
'deflate',
@@ -137,7 +170,7 @@ COMPRESSION_ALGORITHMS = [
]
# utility: mangle the name of a config
-def mangle(elem):
+def mangle(elem, name=None):
xl = {
'-': '_',
':': '',
@@ -162,10 +195,14 @@ def mangle(elem):
r += put
if r[-1] == '_': r = r[:-1]
return r
+ def n(default, name=name):
+ if name is None: return 'grpc_%s_' % default
+ if name == '': return ''
+ return 'grpc_%s_' % name
if isinstance(elem, tuple):
- return 'grpc_mdelem_%s_%s' % (m0(elem[0]), m0(elem[1]))
+ return '%s%s_%s' % (n('mdelem'), m0(elem[0]), m0(elem[1]))
else:
- return 'grpc_mdstr_%s' % (m0(elem))
+ return '%s%s' % (n('mdstr'), m0(elem))
# utility: generate some hash value for a string
def fake_hash(elem):
@@ -181,28 +218,37 @@ def put_banner(files, banner):
print >>f
# build a list of all the strings we need
-all_strs = set()
-all_elems = set()
+all_strs = list()
+all_elems = list()
static_userdata = {}
+# put metadata batch callouts first, to make the check of if a static metadata
+# string is a callout trivial
+for elem in METADATA_BATCH_CALLOUTS:
+ if elem not in all_strs:
+ all_strs.append(elem)
for elem in CONFIG:
if isinstance(elem, tuple):
- all_strs.add(elem[0])
- all_strs.add(elem[1])
- all_elems.add(elem)
+ if elem[0] not in all_strs:
+ all_strs.append(elem[0])
+ if elem[1] not in all_strs:
+ all_strs.append(elem[1])
+ if elem not in all_elems:
+ all_elems.append(elem)
else:
- all_strs.add(elem)
+ if elem not in all_strs:
+ all_strs.append(elem)
compression_elems = []
for mask in range(1, 1<<len(COMPRESSION_ALGORITHMS)):
val = ','.join(COMPRESSION_ALGORITHMS[alg]
for alg in range(0, len(COMPRESSION_ALGORITHMS))
if (1 << alg) & mask)
elem = ('grpc-accept-encoding', val)
- all_strs.add(val)
- all_elems.add(elem)
+ if val not in all_strs:
+ all_strs.append(val)
+ if elem not in all_elems:
+ all_elems.append(elem)
compression_elems.append(elem)
static_userdata[elem] = 1 + (mask | 1)
-all_strs = sorted(list(all_strs), key=mangle)
-all_elems = sorted(list(all_elems), key=mangle)
# output configuration
args = sys.argv[1:]
@@ -279,15 +325,52 @@ print >>H
print >>C, '#include "src/core/lib/transport/static_metadata.h"'
print >>C
+print >>C, '#include "src/core/lib/slice/slice_internal.h"'
+print >>C
+
+str_ofs = 0
+id2strofs = {}
+for i, elem in enumerate(all_strs):
+ id2strofs[i] = str_ofs
+ str_ofs += len(elem);
+def slice_def(i):
+ return '{.refcount = &grpc_static_metadata_refcounts[%d], .data.refcounted = {g_bytes+%d, %d}}' % (i, id2strofs[i], len(all_strs[i]))
+
+# validate configuration
+for elem in METADATA_BATCH_CALLOUTS:
+ assert elem in all_strs
print >>H, '#define GRPC_STATIC_MDSTR_COUNT %d' % len(all_strs)
-print >>H, 'extern grpc_mdstr grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT];'
+print >>H, 'extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];'
for i, elem in enumerate(all_strs):
print >>H, '/* "%s" */' % elem
- print >>H, '#define %s (&grpc_static_mdstr_table[%d])' % (mangle(elem).upper(), i)
+ print >>H, '#define %s (grpc_static_slice_table[%d])' % (mangle(elem).upper(), i)
+print >>H
+print >>C, 'static uint8_t g_bytes[] = {%s};' % (','.join('%d' % ord(c) for c in ''.join(all_strs)))
+print >>C
+print >>C, 'static void static_ref(void *unused) {}'
+print >>C, 'static void static_unref(grpc_exec_ctx *exec_ctx, void *unused) {}'
+print >>C, 'static const grpc_slice_refcount_vtable static_sub_vtable = {static_ref, static_unref, grpc_slice_default_eq_impl, grpc_slice_default_hash_impl};';
+print >>H, 'extern const grpc_slice_refcount_vtable grpc_static_metadata_vtable;';
+print >>C, 'const grpc_slice_refcount_vtable grpc_static_metadata_vtable = {static_ref, static_unref, grpc_static_slice_eq, grpc_static_slice_hash};';
+print >>C, 'static grpc_slice_refcount static_sub_refcnt = {&static_sub_vtable, &static_sub_refcnt};';
+print >>H, 'extern grpc_slice_refcount grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT];'
+print >>C, 'grpc_slice_refcount grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT] = {'
+for i, elem in enumerate(all_strs):
+ print >>C, ' {&grpc_static_metadata_vtable, &static_sub_refcnt},'
+print >>C, '};'
+print >>C
+print >>H, '#define GRPC_IS_STATIC_METADATA_STRING(slice) \\'
+print >>H, ' ((slice).refcount != NULL && (slice).refcount->vtable == &grpc_static_metadata_vtable)'
print >>H
-print >>C, 'grpc_mdstr grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT];'
+print >>C, 'const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT] = {'
+for i, elem in enumerate(all_strs):
+ print >>C, slice_def(i) + ','
+print >>C, '};'
print >>C
+print >>H, '#define GRPC_STATIC_METADATA_INDEX(static_slice) \\'
+print >>H, ' ((int)((static_slice).refcount - grpc_static_metadata_refcounts))'
+print >>H
print >>D, '# hpack fuzzing dictionary'
for i, elem in enumerate(all_strs):
@@ -297,13 +380,12 @@ for i, elem in enumerate(all_elems):
[len(elem[1])] + [ord(c) for c in elem[1]]))
print >>H, '#define GRPC_STATIC_MDELEM_COUNT %d' % len(all_elems)
-print >>H, 'extern grpc_mdelem grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];'
+print >>H, 'extern grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];'
print >>H, 'extern uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];'
for i, elem in enumerate(all_elems):
print >>H, '/* "%s": "%s" */' % elem
- print >>H, '#define %s (&grpc_static_mdelem_table[%d])' % (mangle(elem).upper(), i)
+ print >>H, '#define %s (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[%d], GRPC_MDELEM_STORAGE_STATIC))' % (mangle(elem).upper(), i)
print >>H
-print >>C, 'grpc_mdelem grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];'
print >>C, 'uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] = {'
print >>C, ' %s' % ','.join('%d' % static_userdata.get(elem, 0) for elem in all_elems)
print >>C, '};'
@@ -319,25 +401,100 @@ def md_idx(m):
if m == m2:
return i
-print >>H, 'extern const uint8_t grpc_static_metadata_elem_indices[GRPC_STATIC_MDELEM_COUNT*2];'
-print >>C, 'const uint8_t grpc_static_metadata_elem_indices[GRPC_STATIC_MDELEM_COUNT*2] = {'
-print >>C, ','.join('%d' % str_idx(x) for x in itertools.chain.from_iterable([a,b] for a, b in all_elems))
-print >>C, '};'
+def offset_trials(mink):
+ yield 0
+ for i in range(1, 100):
+ for mul in [-1, 1]:
+ yield mul * i
+
+def perfect_hash(keys, name):
+ p = perfection.hash_parameters(keys)
+ def f(i, p=p):
+ i += p.offset
+ x = i % p.t
+ y = i / p.t
+ return x + p.r[y]
+ return {
+ 'PHASHRANGE': p.t - 1 + max(p.r),
+ 'PHASHNKEYS': len(p.slots),
+ 'pyfunc': f,
+ 'code': """
+static const int8_t %(name)s_r[] = {%(r)s};
+static uint32_t %(name)s_phash(uint32_t i) {
+ i %(offset_sign)s= %(offset)d;
+ uint32_t x = i %% %(t)d;
+ uint32_t y = i / %(t)d;
+ uint32_t h = x;
+ if (y < GPR_ARRAY_SIZE(%(name)s_r)) {
+ uint32_t delta = (uint32_t)%(name)s_r[y];
+ h += delta;
+ }
+ return h;
+}
+ """ % {
+ 'name': name,
+ 'r': ','.join('%d' % (r if r is not None else 0) for r in p.r),
+ 't': p.t,
+ 'offset': abs(p.offset),
+ 'offset_sign': '+' if p.offset > 0 else '-'
+ }
+ }
+
+
+elem_keys = [str_idx(elem[0]) * len(all_strs) + str_idx(elem[1]) for elem in all_elems]
+elem_hash = perfect_hash(elem_keys, "elems")
+print >>C, elem_hash['code']
+
+keys = [0] * int(elem_hash['PHASHRANGE'])
+idxs = [255] * int(elem_hash['PHASHNKEYS'])
+for i, k in enumerate(elem_keys):
+ h = elem_hash['pyfunc'](k)
+ assert keys[h] == 0
+ keys[h] = k
+ idxs[h] = i
+print >>C, 'static const uint16_t elem_keys[] = {%s};' % ','.join('%d' % k for k in keys)
+print >>C, 'static const uint8_t elem_idxs[] = {%s};' % ','.join('%d' % i for i in idxs)
print >>C
-print >>H, 'extern const char *const grpc_static_metadata_strings[GRPC_STATIC_MDSTR_COUNT];'
-print >>C, 'const char *const grpc_static_metadata_strings[GRPC_STATIC_MDSTR_COUNT] = {'
-print >>C, '%s' % ',\n'.join(' "%s"' % s for s in all_strs)
-print >>C, '};'
+print >>H, 'grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b);'
+print >>C, 'grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {'
+print >>C, ' if (a == -1 || b == -1) return GRPC_MDNULL;'
+print >>C, ' uint32_t k = (uint32_t)(a * %d + b);' % len(all_strs)
+print >>C, ' uint32_t h = elems_phash(k);'
+print >>C, ' return elem_keys[h] == k ? GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[elem_idxs[h]], GRPC_MDELEM_STORAGE_STATIC) : GRPC_MDNULL;'
+print >>C, '}'
print >>C
+print >>C, 'grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT] = {'
+for a, b in all_elems:
+ print >>C, '{%s,%s},' % (slice_def(str_idx(a)), slice_def(str_idx(b)))
+print >>C, '};'
+
+print >>H, 'typedef enum {'
+for elem in METADATA_BATCH_CALLOUTS:
+ print >>H, ' %s,' % mangle(elem, 'batch').upper()
+print >>H, ' GRPC_BATCH_CALLOUTS_COUNT'
+print >>H, '} grpc_metadata_batch_callouts_index;'
+print >>H
+print >>H, 'typedef union {'
+print >>H, ' struct grpc_linked_mdelem *array[GRPC_BATCH_CALLOUTS_COUNT];'
+print >>H, ' struct {'
+for elem in METADATA_BATCH_CALLOUTS:
+ print >>H, ' struct grpc_linked_mdelem *%s;' % mangle(elem, '').lower()
+print >>H, ' } named;'
+print >>H, '} grpc_metadata_batch_callouts;'
+print >>H
+print >>H, '#define GRPC_BATCH_INDEX_OF(slice) \\'
+print >>H, ' (GRPC_IS_STATIC_METADATA_STRING((slice)) ? (grpc_metadata_batch_callouts_index)GPR_CLAMP(GRPC_STATIC_METADATA_INDEX((slice)), 0, GRPC_BATCH_CALLOUTS_COUNT) : GRPC_BATCH_CALLOUTS_COUNT)'
+print >>H
+
print >>H, 'extern const uint8_t grpc_static_accept_encoding_metadata[%d];' % (1 << len(COMPRESSION_ALGORITHMS))
print >>C, 'const uint8_t grpc_static_accept_encoding_metadata[%d] = {' % (1 << len(COMPRESSION_ALGORITHMS))
print >>C, '0,%s' % ','.join('%d' % md_idx(elem) for elem in compression_elems)
print >>C, '};'
print >>C
-print >>H, '#define GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(algs) (&grpc_static_mdelem_table[grpc_static_accept_encoding_metadata[(algs)]])'
+print >>H, '#define GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(algs) (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[grpc_static_accept_encoding_metadata[(algs)]], GRPC_MDELEM_STORAGE_STATIC))'
print >>H, '#endif /* GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H */'
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-02 12:00:09 +0000