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067246f7ba
It was removed in a recent version of [Emscripten](https://github.com/emscripten-core/emscripten/blob/main/ChangeLog.md#4014---090225). This is unfortunate as there is no longer a way to map from function pointer (index) back to file offset for PC get function name, however the only such uses I could find were the test itself. Stack trace symbolization should still work. PiperOrigin-RevId: 819879868 Change-Id: I5b41d5ebfe5e9f476972e44127bbeaaf2f864281
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
// Copyright 2020 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <cxxabi.h>
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#include <emscripten.h>
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#include <algorithm>
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#include <cstring>
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#include "absl/base/internal/raw_logging.h"
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#include "absl/debugging/internal/demangle.h"
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#include "absl/strings/numbers.h"
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#include "absl/strings/str_cat.h"
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#include "absl/strings/string_view.h"
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extern "C" {
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const char* emscripten_pc_get_function(const void* pc);
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void* emscripten_stack_snapshot();
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}
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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void InitializeSymbolizer(const char*) {}
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bool Symbolize(const void* pc, char* out, int out_size) {
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if (pc == nullptr || out_size <= 0) {
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return false;
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}
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// Need to capture a snapshot first.
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emscripten_stack_snapshot();
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const char* func_name = emscripten_pc_get_function(pc);
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if (func_name == nullptr) {
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return false;
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}
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strncpy(out, func_name, static_cast<size_t>(out_size));
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if (out[out_size - 1] != '\0') {
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// strncpy() does not '\0' terminate when it truncates.
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static constexpr char kEllipsis[] = "...";
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size_t ellipsis_size =
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std::min(sizeof(kEllipsis) - 1, static_cast<size_t>(out_size) - 1);
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memcpy(out + out_size - ellipsis_size - 1, kEllipsis, ellipsis_size);
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out[out_size - 1] = '\0';
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}
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return true;
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}
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ABSL_NAMESPACE_END
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} // namespace absl
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