Implement posix app loading (#643)
- Added POSIX desktop support for SDK builds, application packaging, and integration testing. - Added POSIX filesystem partitions and improved application path handling. - Added simulator support for loading and running applications dynamically. - Improved simulator task stack handling and display startup reliability. - Improved simulator display scaling, resizing, high-DPI support, and pointer accuracy. - Fixed LVGL timers and input polling on POSIX. (fixes simulator with Linux on some Intel graphics platforms) - Standardized data paths across platforms. - Logging now works via separate task: this allows apps to write to log without it affecting their stdout (for apps that output text as relevant date for other apps, like the File Selection app) - Fixes for app stdio
This commit is contained in:
Ken Van Hoeylandt
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GitHub
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d3656bcd3d
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643cbc3806
@@ -1,6 +1,9 @@
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// SPDX-License-Identifier: Apache-2.0
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#ifdef ESP_PLATFORM
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// Paired with -Wl,--wrap=read/write/close - see Tactility/CMakeLists.txt (POSIX) and the
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// top-level CMakeLists.txt (ESP32) for where that's applied. On a platform where it isn't
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// (currently: macOS, whose linker doesn't support --wrap), these are simply never called - real
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// read()/write()/close() calls go straight through unredirected.
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#include <app/io.h>
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#include <sys/types.h>
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@@ -21,4 +24,177 @@ int __wrap_close(int fd) {
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}
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#endif // ESP_PLATFORM
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// region glibc stdio wraps
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//
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// glibc's printf/fprintf/etc are compiled into libc.so and call an internal, non-exported write()
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// alias - --wrap=write (above) can't reach that call, only calls WE make to the public symbol.
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// These wraps instead redirect calls WE make to printf/fprintf/etc, the same trick as read/write/
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// close above. Newlib (ESP-IDF) doesn't have this gap - its stdio does call the wrappable syscall
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// stubs - so Tactility/CMakeLists.txt only applies the matching -Wl,--wrap= flags on POSIX.
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//
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// Scoped to the printf/getc families only: fread/fwrite take an arbitrary FILE* and are already
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// used sitewide for real file I/O (e.g. File.cpp's readBinaryInternal), so wrapping them would
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// route every such call through this file's stdin/stdout check - a correctness risk for unrelated
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// code that isn't worth taking here. putc/getc are excluded too since glibc defines them as
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// macros, not real calls, so wrapping those symbols wouldn't reliably intercept them.
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#if !defined(ESP_PLATFORM) && !defined(__APPLE__)
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#include <cstdarg>
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#include <cstdio>
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#include <cstring>
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#include <memory>
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#include <unistd.h>
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extern "C" {
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int __real_vfprintf(FILE* stream, const char* format, va_list args);
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int __real_fputs(const char* s, FILE* stream);
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int __real_fputc(int c, FILE* stream);
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int __real_fgetc(FILE* stream);
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char* __real_fgets(char* buffer, int size, FILE* stream);
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}
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namespace {
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void writeAllToStdout(const void* data, size_t size) {
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const auto* bytes = static_cast<const char*>(data);
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size_t remaining = size;
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while (remaining > 0) {
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ssize_t written = app_io_write(STDOUT_FILENO, bytes, remaining);
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if (written <= 0) {
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break;
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}
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bytes += written;
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remaining -= static_cast<size_t>(written);
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}
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}
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// Formats into stdout via app_io_write() rather than through a FILE*'s own buffering, since that
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// buffering is exactly what glibc's internal write() call sidesteps --wrap for in the first place.
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int formatToStdout(const char* format, va_list args) {
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char stackBuffer[256];
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va_list argsForStack;
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va_copy(argsForStack, args);
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int needed = vsnprintf(stackBuffer, sizeof(stackBuffer), format, argsForStack);
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va_end(argsForStack);
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if (needed < 0) {
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return needed;
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}
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if (static_cast<size_t>(needed) < sizeof(stackBuffer)) {
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writeAllToStdout(stackBuffer, static_cast<size_t>(needed));
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return needed;
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}
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auto heapBuffer = std::make_unique<char[]>(static_cast<size_t>(needed) + 1);
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va_list argsForHeap;
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va_copy(argsForHeap, args);
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vsnprintf(heapBuffer.get(), static_cast<size_t>(needed) + 1, format, argsForHeap);
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va_end(argsForHeap);
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writeAllToStdout(heapBuffer.get(), static_cast<size_t>(needed));
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return needed;
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}
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int readOneFromStdin(char& out) {
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return static_cast<int>(app_io_read(STDIN_FILENO, &out, 1));
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}
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} // namespace
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extern "C" {
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int __wrap_vprintf(const char* format, va_list args) {
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return formatToStdout(format, args);
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}
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int __wrap_printf(const char* format, ...) {
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va_list args;
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va_start(args, format);
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int result = formatToStdout(format, args);
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va_end(args);
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return result;
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}
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int __wrap_vfprintf(FILE* stream, const char* format, va_list args) {
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if (stream == stdout) {
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return formatToStdout(format, args);
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}
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return __real_vfprintf(stream, format, args);
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}
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int __wrap_fprintf(FILE* stream, const char* format, ...) {
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va_list args;
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va_start(args, format);
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int result = (stream == stdout) ? formatToStdout(format, args) : __real_vfprintf(stream, format, args);
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va_end(args);
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return result;
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}
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int __wrap_puts(const char* s) {
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writeAllToStdout(s, strlen(s));
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writeAllToStdout("\n", 1);
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return 0;
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}
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int __wrap_fputs(const char* s, FILE* stream) {
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if (stream == stdout) {
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writeAllToStdout(s, strlen(s));
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return 0;
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}
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return __real_fputs(s, stream);
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}
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int __wrap_putchar(int c) {
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auto ch = static_cast<char>(c);
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writeAllToStdout(&ch, 1);
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return c;
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}
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int __wrap_fputc(int c, FILE* stream) {
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if (stream == stdout) {
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return __wrap_putchar(c);
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}
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return __real_fputc(c, stream);
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}
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int __wrap_getchar() {
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char c;
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return readOneFromStdin(c) == 1 ? static_cast<unsigned char>(c) : EOF;
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}
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int __wrap_fgetc(FILE* stream) {
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if (stream == stdin) {
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return __wrap_getchar();
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}
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return __real_fgetc(stream);
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}
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char* __wrap_fgets(char* buffer, int size, FILE* stream) {
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if (stream != stdin) {
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return __real_fgets(buffer, size, stream);
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}
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if (size <= 0) {
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return nullptr;
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}
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int i = 0;
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for (; i < size - 1; ++i) {
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char c;
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if (readOneFromStdin(c) != 1) {
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break;
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}
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buffer[i] = c;
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if (c == '\n') {
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++i;
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break;
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}
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}
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if (i == 0) {
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return nullptr;
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}
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buffer[i] = '\0';
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return buffer;
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}
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}
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#endif // !ESP_PLATFORM && !__APPLE__
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// endregion
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