aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorSverker Eriksson <[email protected]>2014-04-25 22:31:41 +0200
committerSverker Eriksson <[email protected]>2014-04-29 16:17:55 +0200
commit23246d73bbd3188e2c0a45408b9bd29fd034ccaf (patch)
tree63e0a5ec04187a00da149f3ee622b1dba1103914
parent07b8f441ca711f9812fad9e9115bab3c3aa92f79 (diff)
downloadotp-23246d73bbd3188e2c0a45408b9bd29fd034ccaf.tar.gz
otp-23246d73bbd3188e2c0a45408b9bd29fd034ccaf.tar.bz2
otp-23246d73bbd3188e2c0a45408b9bd29fd034ccaf.zip
erts: Save some space in process struct for hipe
by combining hipe.ncallee and hipe.closure in a union as the comment indicate should be possible.
-rw-r--r--erts/emulator/beam/beam_emu.c4
-rw-r--r--erts/emulator/hipe/hipe_debug.c2
-rw-r--r--erts/emulator/hipe/hipe_mkliterals.c4
-rw-r--r--erts/emulator/hipe/hipe_mode_switch.c20
-rw-r--r--erts/emulator/hipe/hipe_process.h7
-rw-r--r--erts/emulator/hipe/hipe_risc_stack.c4
-rw-r--r--erts/emulator/hipe/hipe_x86_stack.c4
7 files changed, 23 insertions, 22 deletions
diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c
index 1026e5f649..f6524f36d2 100644
--- a/erts/emulator/beam/beam_emu.c
+++ b/erts/emulator/beam/beam_emu.c
@@ -4993,14 +4993,14 @@ get_map_elements_fail:
* ... remainder of original BEAM code
*/
ASSERT(I[-5] == (Uint) OpCode(i_func_info_IaaI));
- c_p->hipe.ncallee = (void(*)(void)) I[-4];
+ c_p->hipe.u.ncallee = (void(*)(void)) I[-4];
cmd = HIPE_MODE_SWITCH_CMD_CALL | (I[-1] << 8);
++hipe_trap_count;
goto L_hipe_mode_switch;
}
OpCase(hipe_trap_call_closure): {
ASSERT(I[-5] == (Uint) OpCode(i_func_info_IaaI));
- c_p->hipe.ncallee = (void(*)(void)) I[-4];
+ c_p->hipe.u.ncallee = (void(*)(void)) I[-4];
cmd = HIPE_MODE_SWITCH_CMD_CALL_CLOSURE | (I[-1] << 8);
++hipe_trap_count;
goto L_hipe_mode_switch;
diff --git a/erts/emulator/hipe/hipe_debug.c b/erts/emulator/hipe/hipe_debug.c
index 32694a8f97..7f82252308 100644
--- a/erts/emulator/hipe/hipe_debug.c
+++ b/erts/emulator/hipe/hipe_debug.c
@@ -231,7 +231,7 @@ void hipe_print_pcb(Process *p)
U("nsp ", hipe.nsp);
U("nstack ", hipe.nstack);
U("nstend ", hipe.nstend);
- U("ncallee ", hipe.ncallee);
+ U("ncallee ", hipe.u.ncallee);
hipe_arch_print_pcb(&p->hipe);
#endif /* HIPE */
#undef U
diff --git a/erts/emulator/hipe/hipe_mkliterals.c b/erts/emulator/hipe/hipe_mkliterals.c
index 0e287908b1..23e9214cec 100644
--- a/erts/emulator/hipe/hipe_mkliterals.c
+++ b/erts/emulator/hipe/hipe_mkliterals.c
@@ -498,8 +498,8 @@ static const struct rts_param rts_params[] = {
{ 38, "P_ARG4", 1, offsetof(struct process, def_arg_reg[4]) },
{ 39, "P_ARG5", 1, offsetof(struct process, def_arg_reg[5]) },
{ 40, "P_NSP", 1, offsetof(struct process, hipe.nsp) },
- { 41, "P_NCALLEE", 1, offsetof(struct process, hipe.ncallee) },
- { 42, "P_CLOSURE", 1, offsetof(struct process, hipe.closure) },
+ { 41, "P_NCALLEE", 1, offsetof(struct process, hipe.u.ncallee) },
+ { 42, "P_CLOSURE", 1, offsetof(struct process, hipe.u.closure) },
{ 43, "P_NSP_LIMIT", 1, offsetof(struct process, hipe.nstack) },
{ 44, "P_CSP",
#if defined(__i386__) || defined(__x86_64__)
diff --git a/erts/emulator/hipe/hipe_mode_switch.c b/erts/emulator/hipe/hipe_mode_switch.c
index 4ddc2790b1..7b9f2b5350 100644
--- a/erts/emulator/hipe/hipe_mode_switch.c
+++ b/erts/emulator/hipe/hipe_mode_switch.c
@@ -257,14 +257,14 @@ Process *hipe_mode_switch(Process *p, unsigned cmd, Eterm reg[])
/* BEAM calls a native code function */
unsigned arity = cmd >> 8;
- /* p->hipe.ncallee set in beam_emu */
+ /* p->hipe.u.ncallee set in beam_emu */
if (p->cp == hipe_beam_pc_return) {
/* Native called BEAM, which now tailcalls native. */
hipe_pop_beam_trap_frame(p);
result = hipe_tailcall_to_native(p, arity, reg);
break;
}
- DPRINTF("calling %#lx/%u", (long)p->hipe.ncallee, arity);
+ DPRINTF("calling %#lx/%u", (long)p->hipe.u.ncallee, arity);
result = hipe_call_to_native(p, arity, reg);
break;
}
@@ -282,18 +282,18 @@ Process *hipe_mode_switch(Process *p, unsigned cmd, Eterm reg[])
arity -= funp->num_free; /* arity == #formals */
reg[arity] = fun;
++arity; /* correct for having added the closure */
- /* HIPE_ASSERT(p->hipe.ncallee == (void(*)(void))funp->native_address); */
+ /* HIPE_ASSERT(p->hipe.u.ncallee == (void(*)(void))funp->native_address); */
/* just like a normal call from now on */
- /* p->hipe.ncallee set in beam_emu */
+ /* p->hipe.u.ncallee set in beam_emu */
if (p->cp == hipe_beam_pc_return) {
/* Native called BEAM, which now tailcalls native. */
hipe_pop_beam_trap_frame(p);
result = hipe_tailcall_to_native(p, arity, reg);
break;
}
- DPRINTF("calling %#lx/%u", (long)p->hipe.ncallee, arity);
+ DPRINTF("calling %#lx/%u", (long)p->hipe.u.ncallee, arity);
result = hipe_call_to_native(p, arity, reg);
break;
}
@@ -422,15 +422,15 @@ Process *hipe_mode_switch(Process *p, unsigned cmd, Eterm reg[])
* F(A1, ..., AN, FV1, ..., FVM, Closure)
* (Where Ai is argument i and FVj is free variable j)
*
- * p->hipe.closure contains the closure
+ * p->hipe.u.closure contains the closure
* p->def_arg_reg[] contains the register parameters
* p->hipe.nsp[] contains the stacked parameters
*/
ErlFunThing *closure;
unsigned num_free, arity, i, is_recursive;
- HIPE_ASSERT(is_fun(p->hipe.closure));
- closure = (ErlFunThing*)fun_val(p->hipe.closure);
+ HIPE_ASSERT(is_fun(p->hipe.u.closure));
+ closure = (ErlFunThing*)fun_val(p->hipe.u.closure);
num_free = closure->num_free;
arity = closure->fe->arity;
@@ -463,7 +463,7 @@ Process *hipe_mode_switch(Process *p, unsigned cmd, Eterm reg[])
result = HIPE_MODE_SWITCH_RES_CALL;
}
/* Append the closure as the last parameter. Don't increment arity. */
- reg[arity] = p->hipe.closure;
+ reg[arity] = p->hipe.u.closure;
if (is_recursive) {
/* BEAM called native, which now calls BEAM.
@@ -569,7 +569,7 @@ Process *hipe_mode_switch(Process *p, unsigned cmd, Eterm reg[])
address = hipe_get_remote_na(mfa[0], mfa[1], arity);
if (!address)
goto do_apply_fail;
- p->hipe.ncallee = (void(*)(void)) address;
+ p->hipe.u.ncallee = (void(*)(void)) address;
result = hipe_tailcall_to_native(p, arity, reg);
goto do_return_from_native;
do_apply_fail:
diff --git a/erts/emulator/hipe/hipe_process.h b/erts/emulator/hipe/hipe_process.h
index 4ee99d78a2..cd88a37f80 100644
--- a/erts/emulator/hipe/hipe_process.h
+++ b/erts/emulator/hipe/hipe_process.h
@@ -28,9 +28,10 @@ struct hipe_process_state {
Eterm *nsp; /* Native stack pointer. */
Eterm *nstack; /* Native stack block start. */
Eterm *nstend; /* Native stack block end (start+size). */
- /* XXX: ncallee and closure could share space in a union */
- void (*ncallee)(void); /* Native code callee (label) to invoke. */
- Eterm closure; /* Used to pass a closure from native code. */
+ union {
+ void (*ncallee)(void); /* Native code callee (label) to invoke. */
+ Eterm closure; /* Used to pass a closure from native code. */
+ }u;
Eterm *nstgraylim; /* Gray/white stack boundary. */
Eterm *nstblacklim; /* Black/gray stack boundary. Must exist if
graylim exists. Ignored if no graylim. */
diff --git a/erts/emulator/hipe/hipe_risc_stack.c b/erts/emulator/hipe/hipe_risc_stack.c
index 1183856c7e..bea3a0fecd 100644
--- a/erts/emulator/hipe/hipe_risc_stack.c
+++ b/erts/emulator/hipe/hipe_risc_stack.c
@@ -226,7 +226,7 @@ void (*hipe_handle_stack_trap(Process *p))(void)
* The native stack MUST contain a stack frame as it appears on
* entry to a function (actuals, caller's frame, caller's return address).
* p->hipe.narity MUST contain the arity (number of actuals).
- * On exit, p->hipe.ncallee is set to the handler's PC and p->hipe.nsp
+ * On exit, p->hipe.u.ncallee is set to the handler's PC and p->hipe.nsp
* is set to its SP (low address of its stack frame).
*/
void hipe_find_handler(Process *p)
@@ -254,7 +254,7 @@ void hipe_find_handler(Process *p)
if ((exnra = sdesc_exnra(sdesc)) != 0 &&
(p->catches >= 0 ||
exnra == (unsigned long)&nbif_fail)) {
- p->hipe.ncallee = (void(*)(void)) exnra;
+ p->hipe.u.ncallee = (void(*)(void)) exnra;
p->hipe.nsp = nsp;
p->hipe.narity = 0;
/* update the gray/white boundary if we threw past it */
diff --git a/erts/emulator/hipe/hipe_x86_stack.c b/erts/emulator/hipe/hipe_x86_stack.c
index 9ad3fa9d31..7f1c2f7d41 100644
--- a/erts/emulator/hipe/hipe_x86_stack.c
+++ b/erts/emulator/hipe/hipe_x86_stack.c
@@ -209,7 +209,7 @@ void (*hipe_handle_stack_trap(Process *p))(void)
* The native stack MUST contain a stack frame as it appears on
* entry to a function (return address, actuals, caller's frame).
* p->hipe.narity MUST contain the arity (number of actuals).
- * On exit, p->hipe.ncallee is set to the handler's PC and p->hipe.nsp
+ * On exit, p->hipe.u.ncallee is set to the handler's PC and p->hipe.nsp
* is set to its SP (low address of its stack frame).
*/
void hipe_find_handler(Process *p)
@@ -240,7 +240,7 @@ void hipe_find_handler(Process *p)
if ((exnra = sdesc_exnra(sdesc)) != 0 &&
(p->catches >= 0 ||
exnra == (unsigned long)nbif_fail)) {
- p->hipe.ncallee = (void(*)(void)) exnra;
+ p->hipe.u.ncallee = (void(*)(void)) exnra;
p->hipe.nsp = nsp;
p->hipe.narity = 0;
/* update the gray/white boundary if we threw past it */