207 lines
6.9 KiB
Diff
207 lines
6.9 KiB
Diff
commit e4d87bf9fd36fdf572bde0604168bcf7d2e9838d
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Author: Neil Jerram <neil@ossau.uklinux.net>
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Date: Wed Aug 5 16:13:28 2009 +0100
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Avoid clash with system setjmp/longjmp on IA64
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Problem was that if an application includes both libguile.h and the
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system's setjmp.h, and is compiled on IA64, it gets compile errors
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because of jmp_buf, setjmp and longjmp being multiply defined.
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* libguile/__scm.h (__ia64__): Define scm_i_jmp_buf, SCM_I_SETJMP and
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SCM_I_LONGJMP instead of jmp_buf, setjmp and longjmp.
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(all other platforms): Map scm_i_jmp_buf, SCM_I_SETJMP and
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SCM_I_LONGJMP to jmp_buf, setjmp and longjmp.
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* libguile/continuations.c (scm_make_continuation): Use `SCM_I_SETJMP'
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instead of `setjmp'.
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(copy_stack_and_call): Use `SCM_I_LONJMP' instead of `longjmp'.
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(scm_ia64_longjmp): Use type `scm_i_jmp_buf' instead of `jmp_buf'.
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* libguile/continuations.h (scm_t_contregs): Use type `scm_i_jmp_buf'
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instead of `jmp_buf'.
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* libguile/threads.c (suspend): Use `SCM_I_SETJMP' instead of
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`setjmp'.
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* libguile/threads.h (scm_i_thread): Use type `scm_i_jmp_buf' instead
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of `jmp_buf'.
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* libguile/throw.c (JBJMPBUF, make_jmpbuf, jmp_buf_and_retval): Use
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type `scm_i_jmp_buf' instead of `jmp_buf'.
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(scm_c_catch): Use `SCM_I_SETJMP' instead of `setjmp'.
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(scm_ithrow): Use `SCM_I_LONGJMP' instead of `longjmp'.
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diff --git a/libguile/__scm.h b/libguile/__scm.h
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index b198f9d..a18ab9f 100644
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--- a/libguile/__scm.h
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+++ b/libguile/__scm.h
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@@ -409,19 +409,28 @@
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typedef struct {
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ucontext_t ctx;
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int fresh;
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- } jmp_buf;
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-# define setjmp(JB) \
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+ } scm_i_jmp_buf;
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+# define SCM_I_SETJMP(JB) \
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( (JB).fresh = 1, \
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getcontext (&((JB).ctx)), \
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((JB).fresh ? ((JB).fresh = 0, 0) : 1) )
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-# define longjmp(JB,VAL) scm_ia64_longjmp (&(JB), VAL)
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- void scm_ia64_longjmp (jmp_buf *, int);
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+# define SCM_I_LONGJMP(JB,VAL) scm_ia64_longjmp (&(JB), VAL)
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+ void scm_ia64_longjmp (scm_i_jmp_buf *, int);
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# else /* ndef __ia64__ */
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# include <setjmp.h>
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# endif /* ndef __ia64__ */
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# endif /* ndef _CRAY1 */
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#endif /* ndef vms */
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+/* For any platform where SCM_I_SETJMP hasn't been defined in some
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+ special way above, map SCM_I_SETJMP, SCM_I_LONGJMP and
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+ scm_i_jmp_buf to setjmp, longjmp and jmp_buf. */
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+#ifndef SCM_I_SETJMP
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+#define scm_i_jmp_buf jmp_buf
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+#define SCM_I_SETJMP setjmp
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+#define SCM_I_LONGJMP longjmp
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+#endif
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+
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/* James Clark came up with this neat one instruction fix for
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* continuations on the SPARC. It flushes the register windows so
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* that all the state of the process is contained in the stack.
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diff --git a/libguile/continuations.c b/libguile/continuations.c
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index 69d2569..84a7fed 100644
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--- a/libguile/continuations.c
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+++ b/libguile/continuations.c
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@@ -127,7 +127,7 @@ scm_make_continuation (int *first)
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continuation->offset = continuation->stack - src;
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memcpy (continuation->stack, src, sizeof (SCM_STACKITEM) * stack_size);
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- *first = !setjmp (continuation->jmpbuf);
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+ *first = !SCM_I_SETJMP (continuation->jmpbuf);
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if (*first)
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{
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#ifdef __ia64__
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@@ -224,12 +224,12 @@ copy_stack_and_call (scm_t_contregs *continuation, SCM val,
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scm_i_set_last_debug_frame (continuation->dframe);
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continuation->throw_value = val;
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- longjmp (continuation->jmpbuf, 1);
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+ SCM_I_LONGJMP (continuation->jmpbuf, 1);
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}
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#ifdef __ia64__
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void
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-scm_ia64_longjmp (jmp_buf *JB, int VAL)
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+scm_ia64_longjmp (scm_i_jmp_buf *JB, int VAL)
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{
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scm_i_thread *t = SCM_I_CURRENT_THREAD;
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diff --git a/libguile/continuations.h b/libguile/continuations.h
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index f6fb96a..c61ab2d 100644
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--- a/libguile/continuations.h
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+++ b/libguile/continuations.h
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@@ -43,7 +43,7 @@ SCM_API scm_t_bits scm_tc16_continuation;
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typedef struct
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{
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SCM throw_value;
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- jmp_buf jmpbuf;
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+ scm_i_jmp_buf jmpbuf;
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SCM dynenv;
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#ifdef __ia64__
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void *backing_store;
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diff --git a/libguile/threads.c b/libguile/threads.c
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index 95a905c..f2bb556 100644
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--- a/libguile/threads.c
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+++ b/libguile/threads.c
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@@ -276,7 +276,7 @@ unblock_from_queue (SCM queue)
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var 't'
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// save registers.
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SCM_FLUSH_REGISTER_WINDOWS; // sparc only
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- setjmp (t->regs); // here's most of the magic
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+ SCM_I_SETJMP (t->regs); // here's most of the magic
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... and returns.
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@@ -330,7 +330,7 @@ unblock_from_queue (SCM queue)
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t->top = SCM_STACK_PTR (&t);
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// save registers.
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SCM_FLUSH_REGISTER_WINDOWS;
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- setjmp (t->regs);
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+ SCM_I_SETJMP (t->regs);
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res = func(data);
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scm_enter_guile (t);
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@@ -388,7 +388,7 @@ suspend (void)
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t->top = SCM_STACK_PTR (&t);
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/* save registers. */
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SCM_FLUSH_REGISTER_WINDOWS;
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- setjmp (t->regs);
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+ SCM_I_SETJMP (t->regs);
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return t;
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}
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diff --git a/libguile/threads.h b/libguile/threads.h
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index 2b0e067..e22d9bd 100644
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--- a/libguile/threads.h
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+++ b/libguile/threads.h
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@@ -107,7 +107,7 @@ typedef struct scm_i_thread {
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/* For keeping track of the stack and registers. */
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SCM_STACKITEM *base;
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SCM_STACKITEM *top;
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- jmp_buf regs;
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+ scm_i_jmp_buf regs;
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#ifdef __ia64__
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void *register_backing_store_base;
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scm_t_contregs *pending_rbs_continuation;
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diff --git a/libguile/throw.c b/libguile/throw.c
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index 92c5a1a..fcfde47 100644
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--- a/libguile/throw.c
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+++ b/libguile/throw.c
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@@ -53,7 +53,7 @@ static scm_t_bits tc16_jmpbuffer;
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#define DEACTIVATEJB(x) \
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(SCM_SET_CELL_WORD_0 ((x), (SCM_CELL_WORD_0 (x) & ~(1L << 16L))))
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-#define JBJMPBUF(OBJ) ((jmp_buf *) SCM_CELL_WORD_1 (OBJ))
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+#define JBJMPBUF(OBJ) ((scm_i_jmp_buf *) SCM_CELL_WORD_1 (OBJ))
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#define SETJBJMPBUF(x, v) (SCM_SET_CELL_WORD_1 ((x), (scm_t_bits) (v)))
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#define SCM_JBDFRAME(x) ((scm_t_debug_frame *) SCM_CELL_WORD_2 (x))
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#define SCM_SETJBDFRAME(x, v) (SCM_SET_CELL_WORD_2 ((x), (scm_t_bits) (v)))
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@@ -75,7 +75,7 @@ make_jmpbuf (void)
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{
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SCM answer;
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SCM_NEWSMOB2 (answer, tc16_jmpbuffer, 0, 0);
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- SETJBJMPBUF(answer, (jmp_buf *)0);
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+ SETJBJMPBUF(answer, (scm_i_jmp_buf *)0);
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DEACTIVATEJB(answer);
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return answer;
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}
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@@ -85,7 +85,7 @@ make_jmpbuf (void)
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struct jmp_buf_and_retval /* use only on the stack, in scm_catch */
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{
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- jmp_buf buf; /* must be first */
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+ scm_i_jmp_buf buf; /* must be first */
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SCM throw_tag;
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SCM retval;
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};
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@@ -179,7 +179,7 @@ scm_c_catch (SCM tag,
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pre_unwind.lazy_catch_p = 0;
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SCM_SETJBPREUNWIND(jmpbuf, &pre_unwind);
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- if (setjmp (jbr.buf))
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+ if (SCM_I_SETJMP (jbr.buf))
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{
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SCM throw_tag;
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SCM throw_args;
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@@ -821,7 +821,7 @@ scm_ithrow (SCM key, SCM args, int noreturn SCM_UNUSED)
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jbr->throw_tag = key;
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jbr->retval = args;
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scm_i_set_last_debug_frame (SCM_JBDFRAME (jmpbuf));
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- longjmp (*JBJMPBUF (jmpbuf), 1);
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+ SCM_I_LONGJMP (*JBJMPBUF (jmpbuf), 1);
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}
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/* Otherwise, it's some random piece of junk. */
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