Mercurial > pub > dyncall > dyncall
view test/thunk/test_thunk.c @ 472:e5820b7a3fbc
doc:
- some more plan 9 disas examples
- x86 callconv doc updated:
* mainly info about aggregate passing and returning
* removing section about pascal calling convention, as dyncall doesn't support 16bit abis
- some cleanups
author | Tassilo Philipp |
---|---|
date | Thu, 10 Feb 2022 17:32:05 +0100 |
parents | 7608e34098b0 |
children | 57faec8b7600 |
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/* Package: dyncall Library: test File: test/thunk/test_thunk.c Description: License: Copyright (c) 2011-2021 Daniel Adler <dadler@uni-goettingen.de>, Tassilo Philipp <tphilipp@potion-studios.com> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "../../dyncall/dyncall.h" #include "../../dyncallback/dyncall_thunk.h" #include "../../dyncallback/dyncall_alloc_wx.h" #include "../common/platformInit.h" #include "../common/platformInit.c" /* Impl. for functions only used in this translation unit */ /** ** test: thunks with several allocation modes ** such as on stack, on heap and explicit wx ** **/ #include <errno.h> #include <signal.h> #include <setjmp.h> #include <string.h> jmp_buf jbuf; static int last_sig; void segv_handler(int sig) { last_sig = sig; longjmp(jbuf, 1); } void my_entry(const char* text) { printf("%s: %d\n", text, strcmp(text, "wx") == 0 || strcmp(text, "stack") == 0 || strcmp(text, "heap") == 0); /* @@@ */ } typedef void (printfun)(const char*); void test_stack() { DCThunk t; printfun* fp; dcbInitThunk(&t, &my_entry); fp = (printfun*)&t; if(setjmp(jbuf) != 0) printf(last_sig == SIGSEGV ? "sigsegv\n" : "sigbus\n"); else fp("stack"); } #include <stdlib.h> void test_heap() { printfun* fp; DCThunk* p = (DCThunk*)malloc(sizeof(DCThunk)); if(!p) { printf("0\n"); return; } dcbInitThunk(p, &my_entry); fp = (printfun*)p; if(setjmp(jbuf) != 0) printf(last_sig == SIGSEGV ? "sigsegv\n" : "sigbus\n"); else fp("heap"); free(p); } void test_wx() { DCThunk* p; printfun* fp; int err = dcAllocWX(sizeof(DCThunk), (void**)&p); if(err || !p) { printf("0\n"); return; } dcbInitThunk(p, &my_entry); err = dcInitExecWX((void*)p, sizeof(DCThunk)); if(err) { dcFreeWX((void*)p, sizeof(DCThunk)); printf("0\n"); return; } fp = (printfun*)p; if(setjmp(jbuf) != 0) printf(last_sig == SIGSEGV ? "sigsegv\n" : "sigbus\n"); else fp("wx"); dcFreeWX((void*)p, sizeof(DCThunk)); } int main() { dcTest_initPlatform(); /* handle sigsegv and sigbus (latter used on some platforms for some mem */ /* access errors); use more complex setup if SA_ONSTACK is available */ #if defined(SA_ONSTACK) /* notes: - use sigaction(2) to pass SA_ONSTACK, to handle segfaults on stack (as handler would use same stack, this needs to be requested explicitly) - not using sigaltstack(2), as no need in our case */ struct sigaction sigAct; sigfillset(&(sigAct.sa_mask)); sigAct.sa_sigaction = segv_handler; sigAct.sa_flags = SA_ONSTACK; sigaction(SIGSEGV, &sigAct, NULL); sigaction(SIGBUS, &sigAct, NULL); #else signal(SIGSEGV, segv_handler); #if !defined(DC_WINDOWS) signal(SIGBUS, segv_handler); #endif #endif printf("Allocating ...\n"); printf("... W^X memory: "); test_wx(); printf("... heap memory: "); test_heap(); printf("... stack memory: "); test_stack(); dcTest_deInitPlatform(); return 0; }