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Diffstat (limited to 'src/osd/modules/lib/osdlib_unix.cpp')
-rw-r--r--src/osd/modules/lib/osdlib_unix.cpp261
1 files changed, 200 insertions, 61 deletions
diff --git a/src/osd/modules/lib/osdlib_unix.cpp b/src/osd/modules/lib/osdlib_unix.cpp
index 178fb4594cb..1cfa9b1f183 100644
--- a/src/osd/modules/lib/osdlib_unix.cpp
+++ b/src/osd/modules/lib/osdlib_unix.cpp
@@ -8,23 +8,25 @@
//
//============================================================
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <signal.h>
-#include <dlfcn.h>
+// MAME headers
+#include "osdcore.h"
+#include "osdlib.h"
+#include <SDL2/SDL.h>
+
+#include <csignal>
#include <cstdio>
+#include <cstdlib>
+#include <cstring>
#include <iomanip>
#include <memory>
+#include <string_view>
+#include <dlfcn.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <unistd.h>
-// MAME headers
-#include "osdcore.h"
-#include "osdlib.h"
-
-#include <SDL2/SDL.h>
//============================================================
// osd_getenv
@@ -53,105 +55,175 @@ void osd_process_kill()
kill(getpid(), SIGKILL);
}
+
//============================================================
-// osd_alloc_executable
-//
-// allocates "size" bytes of executable memory. this must take
-// things like NX support into account.
+// osd_break_into_debugger
//============================================================
-void *osd_alloc_executable(size_t size)
+void osd_break_into_debugger(const char *message)
{
-#if defined(SDLMAME_BSD) || defined(SDLMAME_MACOSX) || defined(SDLMAME_EMSCRIPTEN)
- return (void *)mmap(0, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0);
+#if defined(__linux__)
+ bool do_break = false;
+ FILE *const f = std::fopen("/proc/self/status", "r");
+ if (f)
+ {
+ using namespace std::literals;
+
+ std::string_view const tag = "TracerPid:\t"sv;
+ char buf[128];
+ bool ignore = false;
+ while (std::fgets(buf, std::size(buf), f))
+ {
+ // ignore excessively long lines
+ auto const len = strnlen(buf, std::size(buf));
+ bool const noeol = !len || ('\n' != buf[len - 1]);
+ if (ignore || noeol)
+ {
+ ignore = noeol;
+ continue;
+ }
+
+ if (!std::strncmp(buf, tag.data(), tag.length()))
+ {
+ long tpid;
+ if ((std::sscanf(buf + tag.length(), "%ld", &tpid) == 1) && (0 != tpid))
+ do_break = true;
+ break;
+ }
+ }
+ std::fclose(f);
+ }
+#elif defined(MAME_DEBUG)
+ bool const do_break = true;
#else
- return (void *)mmap(0, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, 0, 0);
+ bool const do_break = false;
#endif
+ if (do_break)
+ {
+ printf("MAME exception: %s\n", message);
+ printf("Attempting to fall into debugger\n");
+ kill(getpid(), SIGTRAP);
+ }
+ else
+ {
+ printf("Ignoring MAME exception: %s\n", message);
+ }
}
+
//============================================================
-// osd_free_executable
-//
-// frees memory allocated with osd_alloc_executable
+// osd_get_cache_line_size
//============================================================
-void osd_free_executable(void *ptr, size_t size)
+std::pair<std::error_condition, unsigned> osd_get_cache_line_size() noexcept
{
-#ifdef SDLMAME_SOLARIS
- munmap((char *)ptr, size);
-#else
- munmap(ptr, size);
+#if defined(__linux__)
+ FILE *const f = std::fopen("/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size", "r");
+ if (!f)
+ return std::make_pair(std::error_condition(errno, std::generic_category()), 0U);
+
+ unsigned result = 0;
+ auto const cnt = std::fscanf(f, "%u", &result);
+ std::fclose(f);
+ if (1 == cnt)
+ return std::make_pair(std::error_condition(), result);
+ else
+ return std::make_pair(std::errc::io_error, 0U);
+#else // defined(__linux__)
+ return std::make_pair(std::errc::not_supported, 0U);
#endif
}
-//============================================================
-// osd_break_into_debugger
-//============================================================
-void osd_break_into_debugger(const char *message)
+#ifdef SDLMAME_ANDROID
+std::string osd_get_clipboard_text() noexcept
{
- #ifdef MAME_DEBUG
- printf("MAME exception: %s\n", message);
- printf("Attempting to fall into debugger\n");
- kill(getpid(), SIGTRAP);
- #else
- printf("Ignoring MAME exception: %s\n", message);
- #endif
+ return std::string();
}
-#ifdef SDLMAME_ANDROID
-std::string osd_get_clipboard_text(void)
+std::error_condition osd_set_clipboard_text(std::string_view text) noexcept
{
- return std::string();
+ return std::errc::io_error; // TODO: better error code?
}
#else
//============================================================
// osd_get_clipboard_text
//============================================================
-std::string osd_get_clipboard_text(void)
+std::string osd_get_clipboard_text() noexcept
{
+ // TODO: better error handling
std::string result;
if (SDL_HasClipboardText())
{
- char *temp = SDL_GetClipboardText();
- result.assign(temp);
- SDL_free(temp);
+ char *const temp = SDL_GetClipboardText();
+ if (temp)
+ {
+ try
+ {
+ result.assign(temp);
+ }
+ catch (std::bad_alloc const &)
+ {
+ }
+ SDL_free(temp);
+ }
}
return result;
}
+
+//============================================================
+// osd_set_clipboard_text
+//============================================================
+
+std::error_condition osd_set_clipboard_text(std::string_view text) noexcept
+{
+ try
+ {
+ std::string const clip(text); // need to do this to ensure there's a terminating NUL for SDL
+ if (0 > SDL_SetClipboardText(clip.c_str()))
+ {
+ // SDL_GetError returns a message, can't really convert it to an error condition
+ return std::errc::io_error; // TODO: better error code?
+ }
+
+ return std::error_condition();
+ }
+ catch (std::bad_alloc const &)
+ {
+ return std::errc::not_enough_memory;
+ }
+}
#endif
//============================================================
// osd_getpid
//============================================================
-int osd_getpid(void)
+int osd_getpid() noexcept
{
return getpid();
}
-//============================================================
-// dynamic_module_posix_impl
-//============================================================
namespace osd {
+
+namespace {
+
class dynamic_module_posix_impl : public dynamic_module
{
public:
- dynamic_module_posix_impl(std::vector<std::string> &libraries)
- : m_module(nullptr)
+ dynamic_module_posix_impl(std::vector<std::string> &&libraries) : m_libraries(std::move(libraries))
{
- m_libraries = libraries;
}
virtual ~dynamic_module_posix_impl() override
{
- if (m_module != nullptr)
+ if (m_module)
dlclose(m_module);
- };
+ }
protected:
virtual generic_fptr_t get_symbol_address(char const *symbol) override
@@ -161,19 +233,17 @@ protected:
* one of them, all additional symbols will be loaded from the same library
*/
if (m_module)
- {
return reinterpret_cast<generic_fptr_t>(dlsym(m_module, symbol));
- }
for (auto const &library : m_libraries)
{
- void *module = dlopen(library.c_str(), RTLD_LAZY);
+ void *const module = dlopen(library.c_str(), RTLD_LAZY);
if (module != nullptr)
{
- generic_fptr_t function = reinterpret_cast<generic_fptr_t>(dlsym(module, symbol));
+ generic_fptr_t const function = reinterpret_cast<generic_fptr_t>(dlsym(module, symbol));
- if (function != nullptr)
+ if (function)
{
m_module = module;
return function;
@@ -190,12 +260,81 @@ protected:
private:
std::vector<std::string> m_libraries;
- void * m_module;
+ void * m_module = nullptr;
};
+} // anonymous namespace
+
+
+bool invalidate_instruction_cache(void const *start, std::size_t size) noexcept
+{
+#if !defined(SDLMAME_EMSCRIPTEN)
+ char const *const begin(reinterpret_cast<char const *>(start));
+ char const *const end(begin + size);
+ __builtin___clear_cache(const_cast<char *>(begin), const_cast<char *>(end));
+#endif
+ return true;
+}
+
+
+void *virtual_memory_allocation::do_alloc(std::initializer_list<std::size_t> blocks, unsigned intent, std::size_t &size, std::size_t &page_size) noexcept
+{
+ long const p(sysconf(_SC_PAGE_SIZE));
+ if (0 >= p)
+ return nullptr;
+ std::size_t s(0);
+ for (std::size_t b : blocks)
+ s += (b + p - 1) / p;
+ s *= p;
+ if (!s)
+ return nullptr;
+#if defined __NetBSD__
+ int req((NONE == intent) ? PROT_NONE : 0);
+ if (intent & READ)
+ req |= PROT_READ;
+ if (intent & WRITE)
+ req |= PROT_WRITE;
+ if (intent & EXECUTE)
+ req |= PROT_EXEC;
+ int const prot(PROT_MPROTECT(req));
+#else
+ int const prot(PROT_NONE);
+#endif
+#if defined(SDLMAME_BSD) || defined(SDLMAME_MACOSX) || defined(SDLMAME_EMSCRIPTEN)
+ int const fd(-1);
+#else
+ // TODO: portable applications are supposed to use -1 for anonymous mappings - detect whatever requires 0 specifically
+ int const fd(0);
+#endif
+ void *const result(mmap(nullptr, s, prot, MAP_ANON | MAP_SHARED, fd, 0));
+ if (result == (void *)-1)
+ return nullptr;
+ size = s;
+ page_size = p;
+ return result;
+}
+
+void virtual_memory_allocation::do_free(void *start, std::size_t size) noexcept
+{
+ munmap(reinterpret_cast<char *>(start), size);
+}
+
+bool virtual_memory_allocation::do_set_access(void *start, std::size_t size, unsigned access) noexcept
+{
+ int prot((NONE == access) ? PROT_NONE : 0);
+ if (access & READ)
+ prot |= PROT_READ;
+ if (access & WRITE)
+ prot |= PROT_WRITE;
+ if (access & EXECUTE)
+ prot |= PROT_EXEC;
+ return mprotect(reinterpret_cast<char *>(start), size, prot) == 0;
+}
+
+
dynamic_module::ptr dynamic_module::open(std::vector<std::string> &&names)
{
- return std::make_unique<dynamic_module_posix_impl>(names);
+ return std::make_unique<dynamic_module_posix_impl>(std::move(names));
}
} // namespace osd