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merge(3p/absl): subtree merge of Abseil up to e19260f

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... notably, this includes Abseil's own StatusOr type, which
conflicted with our implementation (that was taken from TensorFlow).

Change-Id: Ie7d6764b64055caaeb8dc7b6b9d066291e6b538f
This commit is contained in:
Vincent Ambo 2020-11-21 14:43:54 +01:00
parent cc27324d02
commit 082c006c04
854 changed files with 11260 additions and 5296 deletions
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76
third_party/abseil_cpp/absl/debugging/internal/demangle.cc vendored
View file

@ -126,6 +126,7 @@ static const AbbrevPair kBuiltinTypeList[] = {
{"Dn", "std::nullptr_t", 0}, // i.e., decltype(nullptr)
{"Df", "decimal32", 0}, // IEEE 754r decimal floating point (32 bits)
{"Di", "char32_t", 0},
{"Du", "char8_t", 0},
{"Ds", "char16_t", 0},
{"Dh", "float16", 0}, // IEEE 754r half-precision float (16 bits)
{nullptr, nullptr, 0},
@ -409,6 +410,7 @@ static bool IsFunctionCloneSuffix(const char *str) {
static bool EndsWith(State *state, const char chr) {
return state->parse_state.out_cur_idx > 0 &&
state->parse_state.out_cur_idx < state->out_end_idx &&
chr == state->out[state->parse_state.out_cur_idx - 1];
}
@ -421,8 +423,10 @@ static void MaybeAppendWithLength(State *state, const char *const str,
if (str[0] == '<' && EndsWith(state, '<')) {
Append(state, " ", 1);
}
// Remember the last identifier name for ctors/dtors.
if (IsAlpha(str[0]) || str[0] == '_') {
// Remember the last identifier name for ctors/dtors,
// but only if we haven't yet overflown the buffer.
if (state->parse_state.out_cur_idx < state->out_end_idx &&
(IsAlpha(str[0]) || str[0] == '_')) {
state->parse_state.prev_name_idx = state->parse_state.out_cur_idx;
state->parse_state.prev_name_length = length;
}
@ -962,6 +966,7 @@ static bool ParseOperatorName(State *state, int *arity) {
// ::= TT <type>
// ::= TI <type>
// ::= TS <type>
// ::= TH <type> # thread-local
// ::= Tc <call-offset> <call-offset> <(base) encoding>
// ::= GV <(object) name>
// ::= T <call-offset> <(base) encoding>
@ -980,7 +985,7 @@ static bool ParseSpecialName(State *state) {
ComplexityGuard guard(state);
if (guard.IsTooComplex()) return false;
ParseState copy = state->parse_state;
if (ParseOneCharToken(state, 'T') && ParseCharClass(state, "VTIS") &&
if (ParseOneCharToken(state, 'T') && ParseCharClass(state, "VTISH") &&
ParseType(state)) {
return true;
}
@ -1077,20 +1082,28 @@ static bool ParseVOffset(State *state) {
return false;
}
// <ctor-dtor-name> ::= C1 | C2 | C3
// <ctor-dtor-name> ::= C1 | C2 | C3 | CI1 <base-class-type> | CI2
// <base-class-type>
// ::= D0 | D1 | D2
// # GCC extensions: "unified" constructor/destructor. See
// # https://github.com/gcc-mirror/gcc/blob/7ad17b583c3643bd4557f29b8391ca7ef08391f5/gcc/cp/mangle.c#L1847
// #
// https://github.com/gcc-mirror/gcc/blob/7ad17b583c3643bd4557f29b8391ca7ef08391f5/gcc/cp/mangle.c#L1847
// ::= C4 | D4
static bool ParseCtorDtorName(State *state) {
ComplexityGuard guard(state);
if (guard.IsTooComplex()) return false;
ParseState copy = state->parse_state;
if (ParseOneCharToken(state, 'C') && ParseCharClass(state, "1234")) {
const char *const prev_name = state->out + state->parse_state.prev_name_idx;
MaybeAppendWithLength(state, prev_name,
state->parse_state.prev_name_length);
return true;
if (ParseOneCharToken(state, 'C')) {
if (ParseCharClass(state, "1234")) {
const char *const prev_name =
state->out + state->parse_state.prev_name_idx;
MaybeAppendWithLength(state, prev_name,
state->parse_state.prev_name_length);
return true;
} else if (ParseOneCharToken(state, 'I') && ParseCharClass(state, "12") &&
ParseClassEnumType(state)) {
return true;
}
}
state->parse_state = copy;
@ -1139,6 +1152,7 @@ static bool ParseDecltype(State *state) {
// ::= <decltype>
// ::= <substitution>
// ::= Dp <type> # pack expansion of (C++0x)
// ::= Dv <num-elems> _ # GNU vector extension
//
static bool ParseType(State *state) {
ComplexityGuard guard(state);
@ -1205,6 +1219,12 @@ static bool ParseType(State *state) {
return true;
}
if (ParseTwoCharToken(state, "Dv") && ParseNumber(state, nullptr) &&
ParseOneCharToken(state, '_')) {
return true;
}
state->parse_state = copy;
return false;
}
@ -1253,13 +1273,42 @@ static bool ParseBuiltinType(State *state) {
return false;
}
// <function-type> ::= F [Y] <bare-function-type> E
// <exception-spec> ::= Do # non-throwing
// exception-specification (e.g.,
// noexcept, throw())
// ::= DO <expression> E # computed (instantiation-dependent)
// noexcept
// ::= Dw <type>+ E # dynamic exception specification
// with instantiation-dependent types
static bool ParseExceptionSpec(State *state) {
ComplexityGuard guard(state);
if (guard.IsTooComplex()) return false;
if (ParseTwoCharToken(state, "Do")) return true;
ParseState copy = state->parse_state;
if (ParseTwoCharToken(state, "DO") && ParseExpression(state) &&
ParseOneCharToken(state, 'E')) {
return true;
}
state->parse_state = copy;
if (ParseTwoCharToken(state, "Dw") && OneOrMore(ParseType, state) &&
ParseOneCharToken(state, 'E')) {
return true;
}
state->parse_state = copy;
return false;
}
// <function-type> ::= [exception-spec] F [Y] <bare-function-type> [O] E
static bool ParseFunctionType(State *state) {
ComplexityGuard guard(state);
if (guard.IsTooComplex()) return false;
ParseState copy = state->parse_state;
if (ParseOneCharToken(state, 'F') &&
if (Optional(ParseExceptionSpec(state)) && ParseOneCharToken(state, 'F') &&
Optional(ParseOneCharToken(state, 'Y')) && ParseBareFunctionType(state) &&
Optional(ParseOneCharToken(state, 'O')) &&
ParseOneCharToken(state, 'E')) {
return true;
}
@ -1887,7 +1936,8 @@ static bool Overflowed(const State *state) {
bool Demangle(const char *mangled, char *out, int out_size) {
State state;
InitState(&state, mangled, out, out_size);
return ParseTopLevelMangledName(&state) && !Overflowed(&state);
return ParseTopLevelMangledName(&state) && !Overflowed(&state) &&
state.parse_state.out_cur_idx > 0;
}
} // namespace debugging_internal