typedef BOOL __stdcall SymFromAddr_fn()

in source/windows/system_info.c [79:150]

• 63 lines of code
• 8 McCabe index (conditional complexity)

typedef BOOL __stdcall SymFromAddr_fn(
    _In_ HANDLE hProcess,
    _In_ DWORD64 Address,
    _Out_opt_ PDWORD64 Displacement,
    _Inout_ PSYMBOL_INFO Symbol);

#    if defined(_WIN64)
typedef BOOL __stdcall SymGetLineFromAddr_fn(
    _In_ HANDLE hProcess,
    _In_ DWORD64 qwAddr,
    _Out_ PDWORD pdwDisplacement,
    _Out_ PIMAGEHLP_LINE64 Line64);
#        define SymGetLineFromAddrName "SymGetLineFromAddr64"
#    else
typedef BOOL __stdcall SymGetLineFromAddr_fn(
    _In_ HANDLE hProcess,
    _In_ DWORD dwAddr,
    _Out_ PDWORD pdwDisplacement,
    _Out_ PIMAGEHLP_LINE Line);
#        define SymGetLineFromAddrName "SymGetLineFromAddr"
#    endif

static SymInitialize_fn *s_SymInitialize = NULL;
static SymSetOptions_fn *s_SymSetOptions = NULL;
static SymFromAddr_fn *s_SymFromAddr = NULL;
static SymGetLineFromAddr_fn *s_SymGetLineFromAddr = NULL;

static aws_thread_once s_init_once = AWS_THREAD_ONCE_STATIC_INIT;
static void s_init_dbghelp_impl(void *user_data) {
    (void)user_data;
    HMODULE dbghelp = LoadLibraryA("DbgHelp.dll");
    if (!dbghelp) {
        fprintf(stderr, "Failed to load DbgHelp.dll.\n");
        goto done;
    }

    s_SymInitialize = (SymInitialize_fn *)GetProcAddress(dbghelp, "SymInitialize");
    if (!s_SymInitialize) {
        fprintf(stderr, "Failed to load SymInitialize from DbgHelp.dll.\n");
        goto done;
    }

    s_SymSetOptions = (SymSetOptions_fn *)GetProcAddress(dbghelp, "SymSetOptions");
    if (!s_SymSetOptions) {
        fprintf(stderr, "Failed to load SymSetOptions from DbgHelp.dll\n");
        goto done;
    }

    s_SymFromAddr = (SymFromAddr_fn *)GetProcAddress(dbghelp, "SymFromAddr");
    if (!s_SymFromAddr) {
        fprintf(stderr, "Failed to load SymFromAddr from DbgHelp.dll.\n");
        goto done;
    }

    s_SymGetLineFromAddr = (SymGetLineFromAddr_fn *)GetProcAddress(dbghelp, SymGetLineFromAddrName);
    if (!s_SymGetLineFromAddr) {
        fprintf(stderr, "Failed to load " SymGetLineFromAddrName " from DbgHelp.dll.\n");
        goto done;
    }

    HANDLE process = GetCurrentProcess();
    AWS_FATAL_ASSERT(process);
    s_SymInitialize(process, NULL, TRUE);
    s_SymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_ANYTHING | SYMOPT_LOAD_LINES);
    return;

done:
    if (dbghelp) {
        FreeLibrary(dbghelp);
    }
    return;
}