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Diffstat (limited to '')
| -rw-r--r-- | gc/dyn_load.c | 799 |
1 files changed, 799 insertions, 0 deletions
diff --git a/gc/dyn_load.c b/gc/dyn_load.c new file mode 100644 index 0000000..d3df0a0 --- /dev/null +++ b/gc/dyn_load.c @@ -0,0 +1,799 @@ +/* + * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. + * Copyright (c) 1997 by Silicon Graphics. All rights reserved. + * + * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED + * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. + * + * Permission is hereby granted to use or copy this program + * for any purpose, provided the above notices are retained on all copies. + * Permission to modify the code and to distribute modified code is granted, + * provided the above notices are retained, and a notice that the code was + * modified is included with the above copyright notice. + * + * Original author: Bill Janssen + * Heavily modified by Hans Boehm and others + */ + +/* + * This is incredibly OS specific code for tracking down data sections in + * dynamic libraries. There appears to be no way of doing this quickly + * without groveling through undocumented data structures. We would argue + * that this is a bug in the design of the dlopen interface. THIS CODE + * MAY BREAK IN FUTURE OS RELEASES. If this matters to you, don't hesitate + * to let your vendor know ... + * + * None of this is safe with dlclose and incremental collection. + * But then not much of anything is safe in the presence of dlclose. + */ +#ifndef MACOS +# include <sys/types.h> +#endif +#include "gc_priv.h" + +/* BTL: avoid circular redefinition of dlopen if SOLARIS_THREADS defined */ +# if defined(SOLARIS_THREADS) && defined(dlopen) + /* To support threads in Solaris, gc.h interposes on dlopen by */ + /* defining "dlopen" to be "GC_dlopen", which is implemented below. */ + /* However, both GC_FirstDLOpenedLinkMap() and GC_dlopen() use the */ + /* real system dlopen() in their implementation. We first remove */ + /* gc.h's dlopen definition and restore it later, after GC_dlopen(). */ +# undef dlopen +# define GC_must_restore_redefined_dlopen +# else +# undef GC_must_restore_redefined_dlopen +# endif + +#if (defined(DYNAMIC_LOADING) || defined(MSWIN32)) && !defined(PCR) +#if !defined(SUNOS4) && !defined(SUNOS5DL) && !defined(IRIX5) && \ + !defined(MSWIN32) && !(defined(ALPHA) && defined(OSF1)) && \ + !defined(HP_PA) && !(defined(LINUX) && defined(__ELF__)) && \ + !defined(RS6000) && !defined(SCO_ELF) + --> We only know how to find data segments of dynamic libraries for the + --> above. Additional SVR4 variants might not be too + --> hard to add. +#endif + +#include <stdio.h> +#ifdef SUNOS5DL +# include <sys/elf.h> +# include <dlfcn.h> +# include <link.h> +#endif +#ifdef SUNOS4 +# include <dlfcn.h> +# include <link.h> +# include <a.out.h> + /* struct link_map field overrides */ +# define l_next lm_next +# define l_addr lm_addr +# define l_name lm_name +#endif + + +#if defined(SUNOS5DL) && !defined(USE_PROC_FOR_LIBRARIES) + +#ifdef LINT + Elf32_Dyn _DYNAMIC; +#endif + +static struct link_map * +GC_FirstDLOpenedLinkMap() +{ + extern Elf32_Dyn _DYNAMIC; + Elf32_Dyn *dp; + struct r_debug *r; + static struct link_map * cachedResult = 0; + static Elf32_Dyn *dynStructureAddr = 0; + /* BTL: added to avoid Solaris 5.3 ld.so _DYNAMIC bug */ + +# ifdef SUNOS53_SHARED_LIB + /* BTL: Avoid the Solaris 5.3 bug that _DYNAMIC isn't being set */ + /* up properly in dynamically linked .so's. This means we have */ + /* to use its value in the set of original object files loaded */ + /* at program startup. */ + if( dynStructureAddr == 0 ) { + void* startupSyms = dlopen(0, RTLD_LAZY); + dynStructureAddr = (Elf32_Dyn*)dlsym(startupSyms, "_DYNAMIC"); + } +# else + dynStructureAddr = &_DYNAMIC; +# endif + + if( dynStructureAddr == 0) { + return(0); + } + if( cachedResult == 0 ) { + int tag; + for( dp = ((Elf32_Dyn *)(&_DYNAMIC)); (tag = dp->d_tag) != 0; dp++ ) { + if( tag == DT_DEBUG ) { + struct link_map *lm + = ((struct r_debug *)(dp->d_un.d_ptr))->r_map; + if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */ + break; + } + } + } + return cachedResult; +} + +#endif /* SUNOS5DL ... */ + +#if defined(SUNOS4) && !defined(USE_PROC_FOR_LIBRARIES) + +#ifdef LINT + struct link_dynamic _DYNAMIC; +#endif + +static struct link_map * +GC_FirstDLOpenedLinkMap() +{ + extern struct link_dynamic _DYNAMIC; + + if( &_DYNAMIC == 0) { + return(0); + } + return(_DYNAMIC.ld_un.ld_1->ld_loaded); +} + +/* Return the address of the ld.so allocated common symbol */ +/* with the least address, or 0 if none. */ +static ptr_t GC_first_common() +{ + ptr_t result = 0; + extern struct link_dynamic _DYNAMIC; + struct rtc_symb * curr_symbol; + + if( &_DYNAMIC == 0) { + return(0); + } + curr_symbol = _DYNAMIC.ldd -> ldd_cp; + for (; curr_symbol != 0; curr_symbol = curr_symbol -> rtc_next) { + if (result == 0 + || (ptr_t)(curr_symbol -> rtc_sp -> n_value) < result) { + result = (ptr_t)(curr_symbol -> rtc_sp -> n_value); + } + } + return(result); +} + +#endif /* SUNOS4 ... */ + +# if defined(SUNOS4) || defined(SUNOS5DL) +/* Add dynamic library data sections to the root set. */ +# if !defined(PCR) && !defined(SOLARIS_THREADS) && defined(THREADS) +# ifndef SRC_M3 + --> fix mutual exclusion with dlopen +# endif /* We assume M3 programs don't call dlopen for now */ +# endif + +# ifdef SOLARIS_THREADS + /* Redefine dlopen to guarantee mutual exclusion with */ + /* GC_register_dynamic_libraries. */ + /* assumes that dlopen doesn't need to call GC_malloc */ + /* and friends. */ +# include <thread.h> +# include <synch.h> + +void * GC_dlopen(const char *path, int mode) +{ + void * result; + +# ifndef USE_PROC_FOR_LIBRARIES + mutex_lock(&GC_allocate_ml); +# endif + result = dlopen(path, mode); +# ifndef USE_PROC_FOR_LIBRARIES + mutex_unlock(&GC_allocate_ml); +# endif + return(result); +} +# endif /* SOLARIS_THREADS */ + +/* BTL: added to fix circular dlopen definition if SOLARIS_THREADS defined */ +# if defined(GC_must_restore_redefined_dlopen) +# define dlopen GC_dlopen +# endif + +# ifndef USE_PROC_FOR_LIBRARIES +void GC_register_dynamic_libraries() +{ + struct link_map *lm = GC_FirstDLOpenedLinkMap(); + + + for (lm = GC_FirstDLOpenedLinkMap(); + lm != (struct link_map *) 0; lm = lm->l_next) + { +# ifdef SUNOS4 + struct exec *e; + + e = (struct exec *) lm->lm_addr; + GC_add_roots_inner( + ((char *) (N_DATOFF(*e) + lm->lm_addr)), + ((char *) (N_BSSADDR(*e) + e->a_bss + lm->lm_addr)), + TRUE); +# endif +# ifdef SUNOS5DL + Elf32_Ehdr * e; + Elf32_Phdr * p; + unsigned long offset; + char * start; + register int i; + + e = (Elf32_Ehdr *) lm->l_addr; + p = ((Elf32_Phdr *)(((char *)(e)) + e->e_phoff)); + offset = ((unsigned long)(lm->l_addr)); + for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) { + switch( p->p_type ) { + case PT_LOAD: + { + if( !(p->p_flags & PF_W) ) break; + start = ((char *)(p->p_vaddr)) + offset; + GC_add_roots_inner( + start, + start + p->p_memsz, + TRUE + ); + } + break; + default: + break; + } + } +# endif + } +# ifdef SUNOS4 + { + static ptr_t common_start = 0; + ptr_t common_end; + extern ptr_t GC_find_limit(); + + if (common_start == 0) common_start = GC_first_common(); + if (common_start != 0) { + common_end = GC_find_limit(common_start, TRUE); + GC_add_roots_inner((char *)common_start, (char *)common_end, TRUE); + } + } +# endif +} + +# endif /* !USE_PROC ... */ +# endif /* SUNOS */ + +#if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) + +/* Dynamic loading code for Linux running ELF. Somewhat tested on + * Linux/x86, untested but hopefully should work on Linux/Alpha. + * This code was derived from the Solaris/ELF support. Thanks to + * whatever kind soul wrote that. - Patrick Bridges */ + +#include <elf.h> +#include <link.h> + +/* Newer versions of Linux/Alpha and Linux/x86 define this macro. We + * define it for those older versions that don't. */ +# ifndef ElfW +# if !defined(ELF_CLASS) || ELF_CLASS == ELFCLASS32 +# define ElfW(type) Elf32_##type +# else +# define ElfW(type) Elf64_##type +# endif +# endif + +static struct link_map * +GC_FirstDLOpenedLinkMap() +{ +# ifdef __GNUC__ +# pragma weak _DYNAMIC +# endif + extern ElfW(Dyn) _DYNAMIC[]; + ElfW(Dyn) *dp; + struct r_debug *r; + static struct link_map *cachedResult = 0; + + if( _DYNAMIC == 0) { + return(0); + } + if( cachedResult == 0 ) { + int tag; + for( dp = _DYNAMIC; (tag = dp->d_tag) != 0; dp++ ) { + if( tag == DT_DEBUG ) { + struct link_map *lm + = ((struct r_debug *)(dp->d_un.d_ptr))->r_map; + if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */ + break; + } + } + } + return cachedResult; +} + + +void GC_register_dynamic_libraries() +{ + struct link_map *lm = GC_FirstDLOpenedLinkMap(); + + + for (lm = GC_FirstDLOpenedLinkMap(); + lm != (struct link_map *) 0; lm = lm->l_next) + { + ElfW(Ehdr) * e; + ElfW(Phdr) * p; + unsigned long offset; + char * start; + register int i; + + e = (ElfW(Ehdr) *) lm->l_addr; + p = ((ElfW(Phdr) *)(((char *)(e)) + e->e_phoff)); + offset = ((unsigned long)(lm->l_addr)); + for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) { + switch( p->p_type ) { + case PT_LOAD: + { + if( !(p->p_flags & PF_W) ) break; + start = ((char *)(p->p_vaddr)) + offset; + GC_add_roots_inner(start, start + p->p_memsz, TRUE); + } + break; + default: + break; + } + } + } +} + +#endif + +#if defined(IRIX5) || defined(USE_PROC_FOR_LIBRARIES) + +#include <sys/procfs.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <elf.h> +#include <errno.h> + +extern void * GC_roots_present(); + /* The type is a lie, since the real type doesn't make sense here, */ + /* and we only test for NULL. */ + +extern ptr_t GC_scratch_last_end_ptr; /* End of GC_scratch_alloc arena */ + +/* We use /proc to track down all parts of the address space that are */ +/* mapped by the process, and throw out regions we know we shouldn't */ +/* worry about. This may also work under other SVR4 variants. */ +void GC_register_dynamic_libraries() +{ + static int fd = -1; + char buf[30]; + static prmap_t * addr_map = 0; + static int current_sz = 0; /* Number of records currently in addr_map */ + static int needed_sz; /* Required size of addr_map */ + register int i; + register long flags; + register ptr_t start; + register ptr_t limit; + ptr_t heap_start = (ptr_t)HEAP_START; + ptr_t heap_end = heap_start; + +# ifdef SUNOS5DL +# define MA_PHYS 0 +# endif /* SUNOS5DL */ + + if (fd < 0) { + sprintf(buf, "/proc/%d", getpid()); + /* The above generates a lint complaint, since pid_t varies. */ + /* It's unclear how to improve this. */ + fd = open(buf, O_RDONLY); + if (fd < 0) { + ABORT("/proc open failed"); + } + } + if (ioctl(fd, PIOCNMAP, &needed_sz) < 0) { + GC_err_printf2("fd = %d, errno = %d\n", fd, errno); + ABORT("/proc PIOCNMAP ioctl failed"); + } + if (needed_sz >= current_sz) { + current_sz = needed_sz * 2 + 1; + /* Expansion, plus room for 0 record */ + addr_map = (prmap_t *)GC_scratch_alloc((word) + (current_sz * sizeof(prmap_t))); + } + if (ioctl(fd, PIOCMAP, addr_map) < 0) { + GC_err_printf4("fd = %d, errno = %d, needed_sz = %d, addr_map = 0x%X\n", + fd, errno, needed_sz, addr_map); + ABORT("/proc PIOCMAP ioctl failed"); + }; + if (GC_n_heap_sects > 0) { + heap_end = GC_heap_sects[GC_n_heap_sects-1].hs_start + + GC_heap_sects[GC_n_heap_sects-1].hs_bytes; + if (heap_end < GC_scratch_last_end_ptr) heap_end = GC_scratch_last_end_ptr; + } + for (i = 0; i < needed_sz; i++) { + flags = addr_map[i].pr_mflags; + if ((flags & (MA_BREAK | MA_STACK | MA_PHYS)) != 0) goto irrelevant; + if ((flags & (MA_READ | MA_WRITE)) != (MA_READ | MA_WRITE)) + goto irrelevant; + /* The latter test is empirically useless. Other than the */ + /* main data and stack segments, everything appears to be */ + /* mapped readable, writable, executable, and shared(!!). */ + /* This makes no sense to me. - HB */ + start = (ptr_t)(addr_map[i].pr_vaddr); + if (GC_roots_present(start)) goto irrelevant; + if (start < heap_end && start >= heap_start) + goto irrelevant; +# ifdef MMAP_STACKS + if (GC_is_thread_stack(start)) goto irrelevant; +# endif /* MMAP_STACKS */ + + limit = start + addr_map[i].pr_size; + if (addr_map[i].pr_off == 0 && strncmp(start, ELFMAG, 4) == 0) { + /* Discard text segments, i.e. 0-offset mappings against */ + /* executable files which appear to have ELF headers. */ + caddr_t arg; + int obj; +# define MAP_IRR_SZ 10 + static ptr_t map_irr[MAP_IRR_SZ]; + /* Known irrelevant map entries */ + static int n_irr = 0; + struct stat buf; + register int i; + + for (i = 0; i < n_irr; i++) { + if (map_irr[i] == start) goto irrelevant; + } + arg = (caddr_t)start; + obj = ioctl(fd, PIOCOPENM, &arg); + if (obj >= 0) { + fstat(obj, &buf); + close(obj); + if ((buf.st_mode & 0111) != 0) { + if (n_irr < MAP_IRR_SZ) { + map_irr[n_irr++] = start; + } + goto irrelevant; + } + } + } + GC_add_roots_inner(start, limit, TRUE); + irrelevant: ; + } + /* Dont keep cached descriptor, for now. Some kernels don't like us */ + /* to keep a /proc file descriptor around during kill -9. */ + if (close(fd) < 0) ABORT("Couldnt close /proc file"); + fd = -1; +} + +# endif /* USE_PROC || IRIX5 */ + +# ifdef MSWIN32 + +# define WIN32_LEAN_AND_MEAN +# define NOSERVICE +# include <windows.h> +# include <stdlib.h> + + /* We traverse the entire address space and register all segments */ + /* that could possibly have been written to. */ + DWORD GC_allocation_granularity; + + extern GC_bool GC_is_heap_base (ptr_t p); + +# ifdef WIN32_THREADS + extern void GC_get_next_stack(char *start, char **lo, char **hi); +# endif + + void GC_cond_add_roots(char *base, char * limit) + { + char dummy; + char * stack_top + = (char *) ((word)(&dummy) & ~(GC_allocation_granularity-1)); + if (base == limit) return; +# ifdef WIN32_THREADS + { + char * curr_base = base; + char * next_stack_lo; + char * next_stack_hi; + + for(;;) { + GC_get_next_stack(curr_base, &next_stack_lo, &next_stack_hi); + if (next_stack_lo >= limit) break; + GC_add_roots_inner(curr_base, next_stack_lo, TRUE); + curr_base = next_stack_hi; + } + if (curr_base < limit) GC_add_roots_inner(curr_base, limit, TRUE); + } +# else + if (limit > stack_top && base < GC_stackbottom) { + /* Part of the stack; ignore it. */ + return; + } + GC_add_roots_inner(base, limit, TRUE); +# endif + } + + extern GC_bool GC_win32s; + + void GC_register_dynamic_libraries() + { + MEMORY_BASIC_INFORMATION buf; + SYSTEM_INFO sysinfo; + DWORD result; + DWORD protect; + LPVOID p; + char * base; + char * limit, * new_limit; + + if (GC_win32s) return; + GetSystemInfo(&sysinfo); + base = limit = p = sysinfo.lpMinimumApplicationAddress; + GC_allocation_granularity = sysinfo.dwAllocationGranularity; + while (p < sysinfo.lpMaximumApplicationAddress) { + result = VirtualQuery(p, &buf, sizeof(buf)); + if (result != sizeof(buf)) { + ABORT("Weird VirtualQuery result"); + } + new_limit = (char *)p + buf.RegionSize; + protect = buf.Protect; + if (buf.State == MEM_COMMIT + && (protect == PAGE_EXECUTE_READWRITE + || protect == PAGE_READWRITE) + && !GC_is_heap_base(buf.AllocationBase)) { + if ((char *)p == limit) { + limit = new_limit; + } else { + GC_cond_add_roots(base, limit); + base = p; + limit = new_limit; + } + } + if (p > (LPVOID)new_limit /* overflow */) break; + p = (LPVOID)new_limit; + } + GC_cond_add_roots(base, limit); + } + +#endif /* MSWIN32 */ + +#if defined(ALPHA) && defined(OSF1) + +#include <loader.h> + +void GC_register_dynamic_libraries() +{ + int status; + ldr_process_t mypid; + + /* module */ + ldr_module_t moduleid = LDR_NULL_MODULE; + ldr_module_info_t moduleinfo; + size_t moduleinfosize = sizeof(moduleinfo); + size_t modulereturnsize; + + /* region */ + ldr_region_t region; + ldr_region_info_t regioninfo; + size_t regioninfosize = sizeof(regioninfo); + size_t regionreturnsize; + + /* Obtain id of this process */ + mypid = ldr_my_process(); + + /* For each module */ + while (TRUE) { + + /* Get the next (first) module */ + status = ldr_next_module(mypid, &moduleid); + + /* Any more modules? */ + if (moduleid == LDR_NULL_MODULE) + break; /* No more modules */ + + /* Check status AFTER checking moduleid because */ + /* of a bug in the non-shared ldr_next_module stub */ + if (status != 0 ) { + GC_printf1("dynamic_load: status = %ld\n", (long)status); + { + extern char *sys_errlist[]; + extern int sys_nerr; + extern int errno; + if (errno <= sys_nerr) { + GC_printf1("dynamic_load: %s\n", (long)sys_errlist[errno]); + } else { + GC_printf1("dynamic_load: %d\n", (long)errno); + } + } + ABORT("ldr_next_module failed"); + } + + /* Get the module information */ + status = ldr_inq_module(mypid, moduleid, &moduleinfo, + moduleinfosize, &modulereturnsize); + if (status != 0 ) + ABORT("ldr_inq_module failed"); + + /* is module for the main program (i.e. nonshared portion)? */ + if (moduleinfo.lmi_flags & LDR_MAIN) + continue; /* skip the main module */ + +# ifdef VERBOSE + GC_printf("---Module---\n"); + GC_printf("Module ID = %16ld\n", moduleinfo.lmi_modid); + GC_printf("Count of regions = %16d\n", moduleinfo.lmi_nregion); + GC_printf("flags for module = %16lx\n", moduleinfo.lmi_flags); + GC_printf("pathname of module = \"%s\"\n", moduleinfo.lmi_name); +# endif + + /* For each region in this module */ + for (region = 0; region < moduleinfo.lmi_nregion; region++) { + + /* Get the region information */ + status = ldr_inq_region(mypid, moduleid, region, ®ioninfo, + regioninfosize, ®ionreturnsize); + if (status != 0 ) + ABORT("ldr_inq_region failed"); + + /* only process writable (data) regions */ + if (! (regioninfo.lri_prot & LDR_W)) + continue; + +# ifdef VERBOSE + GC_printf("--- Region ---\n"); + GC_printf("Region number = %16ld\n", + regioninfo.lri_region_no); + GC_printf("Protection flags = %016x\n", regioninfo.lri_prot); + GC_printf("Virtual address = %16p\n", regioninfo.lri_vaddr); + GC_printf("Mapped address = %16p\n", regioninfo.lri_mapaddr); + GC_printf("Region size = %16ld\n", regioninfo.lri_size); + GC_printf("Region name = \"%s\"\n", regioninfo.lri_name); +# endif + + /* register region as a garbage collection root */ + GC_add_roots_inner ( + (char *)regioninfo.lri_mapaddr, + (char *)regioninfo.lri_mapaddr + regioninfo.lri_size, + TRUE); + + } + } +} +#endif + +#if defined(HP_PA) + +#include <errno.h> +#include <dl.h> + +extern int errno; +extern char *sys_errlist[]; +extern int sys_nerr; + +void GC_register_dynamic_libraries() +{ + int status; + int index = 1; /* Ordinal position in shared library search list */ + struct shl_descriptor *shl_desc; /* Shared library info, see dl.h */ + + /* For each dynamic library loaded */ + while (TRUE) { + + /* Get info about next shared library */ + status = shl_get(index, &shl_desc); + + /* Check if this is the end of the list or if some error occured */ + if (status != 0) { + if (errno == EINVAL) { + break; /* Moved past end of shared library list --> finished */ + } else { + if (errno <= sys_nerr) { + GC_printf1("dynamic_load: %s\n", (long) sys_errlist[errno]); + } else { + GC_printf1("dynamic_load: %d\n", (long) errno); + } + ABORT("shl_get failed"); + } + } + +# ifdef VERBOSE + GC_printf0("---Shared library---\n"); + GC_printf1("\tfilename = \"%s\"\n", shl_desc->filename); + GC_printf1("\tindex = %d\n", index); + GC_printf1("\thandle = %08x\n", + (unsigned long) shl_desc->handle); + GC_printf1("\ttext seg. start = %08x\n", shl_desc->tstart); + GC_printf1("\ttext seg. end = %08x\n", shl_desc->tend); + GC_printf1("\tdata seg. start = %08x\n", shl_desc->dstart); + GC_printf1("\tdata seg. end = %08x\n", shl_desc->dend); + GC_printf1("\tref. count = %lu\n", shl_desc->ref_count); +# endif + + /* register shared library's data segment as a garbage collection root */ + GC_add_roots_inner((char *) shl_desc->dstart, + (char *) shl_desc->dend, TRUE); + + index++; + } +} +#endif /* HP_PA */ + +#ifdef RS6000 +#pragma alloca +#include <sys/ldr.h> +#include <sys/errno.h> +void GC_register_dynamic_libraries() +{ + int len; + char *ldibuf; + int ldibuflen; + struct ld_info *ldi; + + ldibuf = alloca(ldibuflen = 8192); + + while ( (len = loadquery(L_GETINFO,ldibuf,ldibuflen)) < 0) { + if (errno != ENOMEM) { + ABORT("loadquery failed"); + } + ldibuf = alloca(ldibuflen *= 2); + } + + ldi = (struct ld_info *)ldibuf; + while (ldi) { + len = ldi->ldinfo_next; + GC_add_roots_inner( + ldi->ldinfo_dataorg, + (unsigned long)ldi->ldinfo_dataorg + + ldi->ldinfo_datasize, + TRUE); + ldi = len ? (struct ld_info *)((char *)ldi + len) : 0; + } +} +#endif /* RS6000 */ + + + +#else /* !DYNAMIC_LOADING */ + +#ifdef PCR + +# include "il/PCR_IL.h" +# include "th/PCR_ThCtl.h" +# include "mm/PCR_MM.h" + +void GC_register_dynamic_libraries() +{ + /* Add new static data areas of dynamically loaded modules. */ + { + PCR_IL_LoadedFile * p = PCR_IL_GetLastLoadedFile(); + PCR_IL_LoadedSegment * q; + + /* Skip uncommited files */ + while (p != NIL && !(p -> lf_commitPoint)) { + /* The loading of this file has not yet been committed */ + /* Hence its description could be inconsistent. */ + /* Furthermore, it hasn't yet been run. Hence its data */ + /* segments can't possibly reference heap allocated */ + /* objects. */ + p = p -> lf_prev; + } + for (; p != NIL; p = p -> lf_prev) { + for (q = p -> lf_ls; q != NIL; q = q -> ls_next) { + if ((q -> ls_flags & PCR_IL_SegFlags_Traced_MASK) + == PCR_IL_SegFlags_Traced_on) { + GC_add_roots_inner + ((char *)(q -> ls_addr), + (char *)(q -> ls_addr) + q -> ls_bytes, + TRUE); + } + } + } + } +} + + +#else /* !PCR */ + +void GC_register_dynamic_libraries(){} + +int GC_no_dynamic_loading; + +#endif /* !PCR */ +#endif /* !DYNAMIC_LOADING */ |