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tinycc/lib/bt-dll.c

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tccrun.c: standalone backtraces with -bt[N] or -b This makes it possible to get backtraces with executables (including DLLs/SOs) like we had it already with -g -run. Option -b includes -bt, and -bt includes -g. - new file lib/bt-exe.c: used to link rt_printline and the exception handler from tccrun.c into executables/DLLs. - new file lib/bt-log.c: provides a function that may be called from user code to print out a backtrace with a message (currently for i386/x86_64 only): int (*tcc_backtrace)(const char *fmt, ...); As an extra hack, if 'fmt' is prefixed like "^file.c^..." then the backtrace will skip calls from within 'file.c'. - new file lib/bt-dll.c: used on win32 to link the backtrace and bcheck functions with the main module at runtime - bcheck.c: now uses the tcc_backtrace function from above - tccgen.c: minor cleanups - tccelf.c: stab sections get SHF_ALLOC for easy access. Also in relocate_section(): 64bit relocations for stabs in DLLs cannot work. To find DLL addresses, the DLL base is added manually in tccrun.c via rc.prog_base instead. - tccpe.c: there are some changes to allow merging sections, used to merge .finit_array into .data in the first place. - tccpp.c: tcc -run now #defines __TCC_RUN__ also: refactor a line in tal_realloc that was incompatible with bcheck - tcctest.c: fixed a problem with r12 which tcc cannot preserve as well as gcc does. - tests2/112_backtrace.c: test the feature and the bcheck test18 that previously was in boundtest.c
2020-01-18 00:58:39 +03:00
/* ------------------------------------------------------------- */
/* stubs for calling bcheck functions from a dll. */
#include <windows.h>
#include <stdio.h>
#define REDIR_ALL \
REDIR(__bt_init) \
REDIR(tcc_backtrace) \
\
REDIR(__bound_ptr_add) \
REDIR(__bound_ptr_indir1) \
REDIR(__bound_ptr_indir2) \
REDIR(__bound_ptr_indir4) \
REDIR(__bound_ptr_indir8) \
REDIR(__bound_ptr_indir12) \
REDIR(__bound_ptr_indir16) \
REDIR(__bound_local_new) \
REDIR(__bound_local_delete) \
REDIR(__bound_new_region) \
\
REDIR(__bound_free) \
REDIR(__bound_malloc) \
REDIR(__bound_realloc) \
REDIR(__bound_memcpy) \
REDIR(__bound_memcmp) \
REDIR(__bound_memmove) \
REDIR(__bound_memset) \
REDIR(__bound_strlen) \
REDIR(__bound_strcpy) \
REDIR(__bound_strncpy) \
REDIR(__bound_strcmp) \
REDIR(__bound_strncmp) \
REDIR(__bound_strcat) \
REDIR(__bound_strchr) \
REDIR(__bound_strdup)
rework leading underscores tested on win32/64 to pass the tests when enabled - libtcc.c : let tcc define __leading_underscore if enabled tcc_add_symbol() : add _ automatically - tccelf.c : remove tcc_get_symbol_err(), find_c_sym() currently symbol length is limited to 256 in several places, so we can use a fixed local buffer for now as well. - win32/lib/crtinit.c : new file for init/fini - lib/*.S, tests7* : use __leading_underscore - bt-log.c: this file wont work relibaly if compiled with gcc
2020-06-27 18:15:06 +03:00
#ifdef __leading_underscore
#define _(s) "_"#s
#else
#define _(s) #s
#endif
tccrun.c: standalone backtraces with -bt[N] or -b This makes it possible to get backtraces with executables (including DLLs/SOs) like we had it already with -g -run. Option -b includes -bt, and -bt includes -g. - new file lib/bt-exe.c: used to link rt_printline and the exception handler from tccrun.c into executables/DLLs. - new file lib/bt-log.c: provides a function that may be called from user code to print out a backtrace with a message (currently for i386/x86_64 only): int (*tcc_backtrace)(const char *fmt, ...); As an extra hack, if 'fmt' is prefixed like "^file.c^..." then the backtrace will skip calls from within 'file.c'. - new file lib/bt-dll.c: used on win32 to link the backtrace and bcheck functions with the main module at runtime - bcheck.c: now uses the tcc_backtrace function from above - tccgen.c: minor cleanups - tccelf.c: stab sections get SHF_ALLOC for easy access. Also in relocate_section(): 64bit relocations for stabs in DLLs cannot work. To find DLL addresses, the DLL base is added manually in tccrun.c via rc.prog_base instead. - tccpe.c: there are some changes to allow merging sections, used to merge .finit_array into .data in the first place. - tccpp.c: tcc -run now #defines __TCC_RUN__ also: refactor a line in tal_realloc that was incompatible with bcheck - tcctest.c: fixed a problem with r12 which tcc cannot preserve as well as gcc does. - tests2/112_backtrace.c: test the feature and the bcheck test18 that previously was in boundtest.c
2020-01-18 00:58:39 +03:00
#define REDIR(s) void *s;
static struct { REDIR_ALL } all_ptrs;
#undef REDIR
#define REDIR(s) #s"\0"
static const char all_names[] = REDIR_ALL;
#undef REDIR
rework leading underscores tested on win32/64 to pass the tests when enabled - libtcc.c : let tcc define __leading_underscore if enabled tcc_add_symbol() : add _ automatically - tccelf.c : remove tcc_get_symbol_err(), find_c_sym() currently symbol length is limited to 256 in several places, so we can use a fixed local buffer for now as well. - win32/lib/crtinit.c : new file for init/fini - lib/*.S, tests7* : use __leading_underscore - bt-log.c: this file wont work relibaly if compiled with gcc
2020-06-27 18:15:06 +03:00
#define REDIR(s) __asm__(".global " _(s) ";" _(s) ": jmp *%0" : : "m" (all_ptrs.s) );
tccrun.c: standalone backtraces with -bt[N] or -b This makes it possible to get backtraces with executables (including DLLs/SOs) like we had it already with -g -run. Option -b includes -bt, and -bt includes -g. - new file lib/bt-exe.c: used to link rt_printline and the exception handler from tccrun.c into executables/DLLs. - new file lib/bt-log.c: provides a function that may be called from user code to print out a backtrace with a message (currently for i386/x86_64 only): int (*tcc_backtrace)(const char *fmt, ...); As an extra hack, if 'fmt' is prefixed like "^file.c^..." then the backtrace will skip calls from within 'file.c'. - new file lib/bt-dll.c: used on win32 to link the backtrace and bcheck functions with the main module at runtime - bcheck.c: now uses the tcc_backtrace function from above - tccgen.c: minor cleanups - tccelf.c: stab sections get SHF_ALLOC for easy access. Also in relocate_section(): 64bit relocations for stabs in DLLs cannot work. To find DLL addresses, the DLL base is added manually in tccrun.c via rc.prog_base instead. - tccpe.c: there are some changes to allow merging sections, used to merge .finit_array into .data in the first place. - tccpp.c: tcc -run now #defines __TCC_RUN__ also: refactor a line in tal_realloc that was incompatible with bcheck - tcctest.c: fixed a problem with r12 which tcc cannot preserve as well as gcc does. - tests2/112_backtrace.c: test the feature and the bcheck test18 that previously was in boundtest.c
2020-01-18 00:58:39 +03:00
static void all_jmps() { REDIR_ALL }
#undef REDIR
void __bt_init_dll(int bcheck)
{
const char *s = all_names;
void **p = (void**)&all_ptrs;
do {
*p = (void*)GetProcAddress(GetModuleHandle(NULL), (char*)s);
if (NULL == *p) {
char buf[100];
sprintf(buf,
"Error: function '%s()' not found in executable. "
"(Need -bt or -b for linking the exe.)", s);
if (GetStdHandle(STD_ERROR_HANDLE))
fprintf(stderr, "TCC/BCHECK: %s\n", buf), fflush(stderr);
else
MessageBox(NULL, buf, "TCC/BCHECK", MB_ICONERROR);
ExitProcess(1);
}
s = strchr(s,'\0') + 1, ++p;
} while (*s && (bcheck || p < &all_ptrs.__bound_ptr_add));
}
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