GDB, the GNU Debugger, can use UST markers as GDB tracepoints (note GDB has its
own concept of tracepoint). This feature is called GDB Static Tracepoints. When
a GDB tracepoint is hit, GDB collects the marker arguments, as well as the
-state of the registers.
-
-In UST, support for GDB integration is not compiled in by default because of
-the cost of saving registers when a marker is hit. To enable it, run the
-@command{./configure} script with the @code{-DCONFIG_UST_GDB_INTEGRATION} flag
-in the @env{CFLAGS} environment variable. For example:
-
-@example
-@verbatim
-
-CFLAGS=-DCONFIG_UST_GDB_INTEGRATION ./configure
-
-@end verbatim
-@end example
-
-As of this writing, GDB Static Tracepoints have been submitted
-(@url{http://sourceware.org/ml/gdb-patches/2010-06/msg00592.html}) to the GDB
-mailing list.
-
-GDB integration is currently only supported on x86-32 and x86-64.
+state of the registers. Support for GDB is currently work in progress.
@bye
*
* (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
* (C) Copyright 2009 Pierre-Marc Fournier <pierre-marc dot fournier at polymtl dot ca>
+ * (C) Copyright 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
#include <stdarg.h>
#include <ust/core.h>
#include <urcu/list.h>
-#include <ust/processor.h>
#include <ust/kcompat/kcompat.h>
-#include <ust/kcompat/stringify.h>
#include <bits/wordsize.h>
* format string to recover the variable argument list.
*/
typedef void ust_marker_probe_func(const struct ust_marker *mdata,
- void *probe_private, struct registers *regs, void *call_private,
+ void *probe_private, void *call_private,
const char *fmt, va_list *args);
struct ust_marker_probe_closure {
/* Probe wrapper */
u16 channel_id; /* Numeric channel identifier, dynamic */
u16 event_id; /* Numeric event identifier, dynamic */
- void (*call)(const struct ust_marker *mdata, void *call_private, struct registers *regs, ...);
+ void (*call)(const struct ust_marker *mdata, void *call_private, ...);
struct ust_marker_probe_closure single;
struct ust_marker_probe_closure *multi;
const char *tp_name; /* Optional tracepoint name */
void *tp_cb; /* Optional tracepoint callback */
- void *location; /* Address of marker in code */
};
-#define GET_UST_MARKER(name) (__ust_marker_ust_##name)
-
-#define _DEFINE_UST_MARKER(channel, name, tp_name_str, tp_cb, format, unique, m) \
- struct registers __ust_marker_regs; \
- \
- /* This next asm has to be a basic inline asm (no input/output/clobber), \
- * because it must not require %-sign escaping, as we most certainly \
- * have some %-signs in the format string. \
- */ \
- asm volatile ( \
- /* We only define these symbols if they have not yet been defined. Indeed, \
- * if two markers with the same channel/name are on the same line, they \
- * will try to create the same symbols, resulting in a conflict. This \
- * is not unusual as it can be the result of function inlining. \
- */ \
- ".ifndef __mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) "\n\t" \
- /*".section __ust_marker_strings\n\t"*/ \
- ".section __ust_marker_strings,\"aw\"\n\t" \
- "__mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) ":\n\t" \
- ".string \"" __stringify(channel) "\"\n\t" \
- "__mstrtab_" __stringify(channel) "_" __stringify(name) "_name_" __stringify(unique) ":\n\t" \
- ".string \"" __stringify(name) "\"\n\t" \
- "__mstrtab_" __stringify(channel) "_" __stringify(name) "_format_" __stringify(unique) ":\n\t" \
- ".string " "\"" format "\"" "\n\t" \
- ".previous\n\t" \
- ".endif\n\t" \
- ); \
- asm volatile ( \
- /*".section __ust_marker\n\t"*/ \
- ".section __ust_marker,\"aw\"\n\t" \
- "2:\n\t" \
- _ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) ")\n\t" /* channel string */ \
- _ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_name_" __stringify(unique) ")\n\t" /* name string */ \
- _ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_format_" __stringify(unique) ")\n\t" /* format string */ \
- ".byte 0\n\t" /* state imv */ \
- ".byte 0\n\t" /* ptype */ \
- ".hword 0\n\t" /* channel_id */ \
- ".hword 0\n\t" /* event_id */ \
- ".balign " __stringify(__WORDSIZE) " / 8\n\t" /* alignment */ \
- _ASM_PTR "(ust_marker_probe_cb)\n\t" /* call */ \
- _ASM_PTR "(__ust_marker_empty_function)\n\t" /* ust_marker_probe_closure single.field1 */ \
- _ASM_PTR "0\n\t" /* ust_marker_probe_closure single.field2 */ \
- _ASM_PTR "0\n\t" /* ust_marker_probe_closure *multi */ \
- _ASM_PTR "0\n\t" /* tp_name */ \
- _ASM_PTR "0\n\t" /* tp_cb */ \
- _ASM_PTR "(1f)\n\t" /* location */ \
- ".previous\n\t" \
- /*".section __ust_marker_ptrs\n\t"*/ \
- ".section __ust_marker_ptrs,\"aw\"\n\t" \
- _ASM_PTR "(2b)\n\t" \
- ".previous\n\t" \
- "1:\n\t" \
- ARCH_COPY_ADDR("%[outptr]") \
- : [outptr] "=r" (m) ); \
- \
- save_registers(&__ust_marker_regs)
-
-
-#define DEFINE_UST_MARKER(name, format, unique, m) \
- _DEFINE_UST_MARKER(ust, name, NULL, NULL, format, unique, m)
+#define GET_UST_MARKER(name) (__ust_marker_def_##name)
-#define DEFINE_UST_MARKER_TP(name, tp_name, tp_cb, format) \
- _DEFINE_UST_MARKER_TP(ust, name, #tp_name, tp_cb, format)
+/*
+ * We keep the "channel" as internal field for marker.c *only*. It will be
+ * removed soon.
+ */
-#define _DEFINE_UST_MARKER_TP(channel, name, tp_name_str, tp_cb, format)\
+/*
+ * __ust_marker_ptrs section is not const (read-only) because it needs to be
+ * read-write to let the linker apply relocations and keep the object PIC.
+ */
+#define _DEFINE_UST_MARKER(channel, name, tp_name_str, tp_cb, format) \
static const char __mstrtab_##channel##_##name[] \
- __attribute__((section("__ust_marker_strings"))) \
+ __attribute__((section("__ust_markers_strings"))) \
= #channel "\0" #name "\0" format; \
- static struct ust_marker __ust_marker_##channel##_##name\
- __attribute__((section("__ust_marker"))) = \
+ static struct ust_marker __ust_marker_def_##name \
+ __attribute__((section("__ust_markers"))) = \
{ __mstrtab_##channel##_##name, \
- &__mstrtab_##channel##_##name[sizeof(#channel)],\
- &__mstrtab_##channel##_##name[sizeof(#channel) + sizeof(#name)], \
- 0, 0, 0, 0, ust_marker_probe_cb, \
- { __ust_marker_empty_function, NULL}, \
- NULL, tp_name_str, tp_cb }; \
- static struct ust_marker * const __ust_marker_ptr_##channel##_##name \
+ &__mstrtab_##channel##_##name[sizeof(#channel)], \
+ &__mstrtab_##channel##_##name[sizeof(#channel) + \
+ sizeof(#name)], \
+ 0, 0, 0, 0, ust_marker_probe_cb, \
+ { __ust_marker_empty_function, NULL}, \
+ NULL, tp_name_str, tp_cb }; \
+ static struct ust_marker * __ust_marker_ptr_##name \
__attribute__((used, section("__ust_marker_ptrs"))) = \
- &__ust_marker_##channel##_##name;
+ &__ust_marker_def_##name
+
+#define DEFINE_UST_MARKER(name, format) \
+ _DEFINE_UST_MARKER(ust, name, NULL, NULL, format)
+
+#define DEFINE_UST_MARKER_TP(name, tp_name, tp_cb, format) \
+ _DEFINE_UST_MARKER(ust, name, #tp_name, tp_cb, format)
/*
* Make sure the alignment of the structure in the __ust_marker section will
* structure. Force alignment to the same alignment as the section start.
*/
-#define __ust_marker(channel, name, call_private, format, args...) \
- __ust_marker_counter(channel, name, __LINE__, call_private, format, ## args)
-
-#define __ust_marker_counter(channel, name, unique, call_private, format, args...) \
+#define __ust_marker(channel, name, call_private, format, args...) \
do { \
- struct ust_marker *__ust_marker_counter_ptr; \
- _DEFINE_UST_MARKER(channel, name, NULL, NULL, format, unique, __ust_marker_counter_ptr); \
+ _DEFINE_UST_MARKER(channel, name, NULL, NULL, format); \
__ust_marker_check_format(format, ## args); \
- if (unlikely(__ust_marker_counter_ptr->state)) \
- (__ust_marker_counter_ptr->call)(__ust_marker_counter_ptr, call_private, &__ust_marker_regs, ## args); \
+ if (unlikely(__ust_marker_def_##name.state)) \
+ (__ust_marker_def_##name.call) \
+ (&__ust_marker_def_##name, call_private,\
+ ## args); \
} while (0)
-#define __ust_marker_tp(channel, name, call_private, tp_name, tp_cb, format, args...) \
- __ust_marker_tp_counter(channel, name, __LINE__, call_private, tp_name, tp_cb, format, ## args)
-
-#define __ust_marker_tp_counter(channel, name, unique, call_private, tp_name, tp_cb, format, args...) \
+#define __ust_marker_tp(name, call_private, tp_name, tp_cb, \
+ format, args...) \
do { \
- struct registers __ust_marker_regs; \
void __check_tp_type(void) \
{ \
- register_trace_##tp_name(tp_cb, call_private); \
+ register_trace_##tp_name(tp_cb, call_private); \
} \
- _DEFINE_UST_MARKER_TP(channel, name, #tp_name, tp_cb, format); \
+ DEFINE_UST_MARKER_TP(name, #tp_name, tp_cb, format); \
__ust_marker_check_format(format, ## args); \
- (*__ust_marker_##channel##_##name.call)(&__ust_marker_##channel##_##name, \
- call_private, &__ust_marker_regs, ## args); \
+ (*__ust_marker_def_##name.call) \
+ (&__ust_marker_def_##name, call_private, ## args); \
} while (0)
extern void ust_marker_update_probe_range(struct ust_marker * const *begin,
extern ust_marker_probe_func __ust_marker_empty_function;
extern void ust_marker_probe_cb(const struct ust_marker *mdata,
- void *call_private, struct registers *regs, ...);
+ void *call_private, ...);
/*
* Connect a probe to a marker.
struct ust_marker_lib {
struct ust_marker * const *ust_marker_start;
-#ifdef CONFIG_UST_GDB_INTEGRATION
- struct ust_marker_addr *ust_marker_addr_start;
-#endif
int ust_marker_count;
struct cds_list_head list;
};
#define UST_MARKER_LIB \
extern struct ust_marker * const __start___ust_marker_ptrs[] __attribute__((weak, visibility("hidden"))); \
extern struct ust_marker * const __stop___ust_marker_ptrs[] __attribute__((weak, visibility("hidden"))); \
- static struct ust_marker * const __ust_marker_ptr_dummy \
- __attribute__((used, section("__ust_marker_ptrs"))) = NULL;\
+ static struct ust_marker * __ust_marker_ptr_dummy \
+ __attribute__((used, section("__ust_marker_ptrs"))); \
\
static void __attribute__((constructor)) __ust_marker__init(void) \
{ \
#ifndef UST_PROCESSOR_H
#define UST_PROCESSOR_H
-#include <stddef.h>
-#include <string.h>
-#include <urcu-bp.h>
-
-extern __thread long ust_reg_stack[500];
-extern volatile __thread long *ust_reg_stack_ptr;
-
#define ____cacheline_aligned __attribute__((aligned(CAA_CACHE_LINE_SIZE)))
#ifdef __i386
-struct registers {
- short ss;
- short cs;
- long esi;
- long ebp;
- long edx;
- long edi;
- long ecx;
- long ebx;
- long eax;
- long eflags;
- long esp;
-};
-
static inline int fls(int x)
{
int r;
return r + 1;
}
-#ifdef CONFIG_UST_GDB_INTEGRATION
-
-/* save_registers - saves most of the processor's registers so
- * they are available to the probe. gdb uses this to give the
- * value of local variables.
- *
- * Saving all registers without losing any of their values is
- * tricky.
- *
- * We cannot pass to the asm stub the address of a registers structure
- * on the stack, because it will use a register and override its value.
- *
- * We don't want to use a stub to push the regs on the stack and then
- * another stub to copy them to a structure because changing %sp in asm
- * and then returning to C (even briefly) can have unexpected results.
- * Also, gcc might modify %sp between the stubs in reaction to the
- * register needs of the second stub that needs to know where to copy
- * the register values.
- *
- * So the chosen approach is to use another stack, declared in thread-
- * local storage, to push the registers. They are subsequently copied
- * to the stack, by C code.
- */
-
-#define save_registers(regsptr) \
- asm volatile ( \
- /* save original esp */ \
- "pushl %%esp\n\t" \
- /* push original eflags */ \
- "pushfl\n\t" \
- /* eax will hold the ptr to the private stack bottom */ \
- "pushl %%eax\n\t" \
- /* ebx is used for TLS access */ \
- "pushl %%ebx\n\t" \
- /* ecx will be used to temporarily hold the stack bottom addr */\
- "pushl %%ecx\n\t" \
- /* rdi is the input to __tls_get_addr, and also a temp var */ \
- "pushl %%edi\n\t" \
- /* For TLS access, we have to do function calls. However, \
- * we must not lose the original value of: \
- * esp, eflags, eax, ebx, ecx, edx, esi, edi, ebp, cs, ss \
- * \
- * Some registers' original values have already been saved: \
- * esp, eflags, eax, ebx, ecx, edi \
- * \
- * In addition, the i386 ABI says the following registers belong\
- * to the caller function: \
- * esp, ebp, esi, edi, ebx \
- * \
- * The following registers should not be changed by the callee: \
- * cs, ss \
- * \
- * Therefore, the following registers must be explicitly \
- * preserved: \
- * edx \
- */ \
- "pushl %%edx\n\t" \
- /* Get GOT address */ \
- "call __i686.get_pc_thunk.bx\n\t" \
- "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t" \
- /* Start TLS access of private reg stack pointer */ \
- "leal ust_reg_stack_ptr@tlsgd(,%%ebx,1),%%eax\n\t" \
- "call ___tls_get_addr@plt\n\t" \
- /* --- End TLS access */ \
- /* check if ust_reg_stack_ptr has been initialized */ \
- "movl (%%eax),%%ecx\n\t" \
- "testl %%ecx,%%ecx\n\t" \
- "jne 1f\n\t" \
- "movl %%eax,%%ecx\n\t" \
- /* Save ecx because we are using it. */ \
- "pushl %%ecx\n\t" \
- /* Start TLS access of private reg stack */ \
- "leal ust_reg_stack@tlsgd(,%%ebx,1),%%eax\n\t" \
- "call ___tls_get_addr@plt\n\t" \
- /* --- End TLS access */ \
- "popl %%ecx\n\t" \
- "addl $500,%%eax\n\t" \
- "movl %%eax,(%%ecx)\n\t" \
- "movl %%ecx,%%eax\n\t" \
- /* now the pointer to the private stack is in eax. \
- must add stack size so the ptr points to the stack bottom. */ \
- "1:\n\t" \
- /* edx was pushed for function calls */ \
- "popl %%edx\n\t" \
- /* Manually push esp to private stack */ \
- "addl $-4,(%%eax)\n\t" \
- "movl 20(%%esp), %%edi\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%edi, (%%ebx)\n\t" \
- /* Manually push eflags to private stack */ \
- "addl $-4,(%%eax)\n\t" \
- "movl 16(%%esp), %%edi\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%edi, (%%ebx)\n\t" \
- /* Manually push eax to private stack */ \
- "addl $-4,(%%eax)\n\t" \
- "movl 12(%%esp), %%edi\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%edi, (%%ebx)\n\t" \
- /* Manually push ebx to private stack */ \
- "addl $-4,(%%eax)\n\t" \
- "movl 8(%%esp), %%edi\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%edi, (%%ebx)\n\t" \
- /* Manually push ecx to private stack */ \
- "addl $-4,(%%eax)\n\t" \
- "movl 4(%%esp), %%edi\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%edi, (%%ebx)\n\t" \
- /* Manually push edi to private stack */ \
- "addl $-4,(%%eax)\n\t" \
- "movl 0(%%esp), %%edi\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%edi, (%%ebx)\n\t" \
- /* now push regs to tls */ \
- /* -- esp already pushed -- */ \
- /* -- eax already pushed -- */ \
- /* -- ebx already pushed -- */ \
- /* -- ecx already pushed -- */ \
- /* -- edi already pushed -- */ \
- "addl $-4,(%%eax)\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%edx,(%%ebx)\n\t" \
- "addl $-4,(%%eax)\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%ebp,(%%ebx)\n\t" \
- "addl $-4,(%%eax)\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movl %%esi,(%%ebx)\n\t" \
- /* push cs */ \
- "addl $-2,(%%eax)\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movw %%cs, (%%ebx)\n\t" \
- /* push ss */ \
- "addl $-2,(%%eax)\n\t" \
- "movl (%%eax), %%ebx\n\t" \
- "movw %%ss, (%%ebx)\n\t" \
- /* restore original values of regs that were used internally */ \
- "popl %%edi\n\t" \
- "popl %%ecx\n\t" \
- "popl %%ebx\n\t" \
- "popl %%eax\n\t" \
- /* cancel push of rsp */ \
- "addl $4,%%esp\n\t" \
- /* cancel push of eflags */ \
- "addl $4,%%esp\n\t" \
- ::: "memory"); \
- memcpy(regsptr, (void *)ust_reg_stack_ptr, sizeof(struct registers)); \
- ust_reg_stack_ptr = (void *)(((long)ust_reg_stack_ptr) + sizeof(struct registers));
-
-#else /* CONFIG_UST_GDB_INTEGRATION */
-
-#define save_registers(a)
-
-#endif /* CONFIG_UST_GDB_INTEGRATION */
-
-#define RELATIVE_ADDRESS(__rel_label__) __rel_label__
-
-#define ARCH_COPY_ADDR(dst) "lea 2b," dst "\n\t"
-
-#define _ASM_PTR ".long "
-
#elif defined(__x86_64)
-struct registers {
- int padding; /* 4 bytes */
- short ss;
- short cs;
- unsigned long r15;
- unsigned long r14;
- unsigned long r13;
- unsigned long r12;
- unsigned long r11;
- unsigned long r10;
- unsigned long r9;
- unsigned long r8;
- unsigned long rsi;
- unsigned long rbp;
- unsigned long rdx;
- unsigned long rcx;
- unsigned long rdi;
- unsigned long rbx;
- unsigned long rax;
- unsigned long rflags;
- unsigned long rsp;
-};
-
static inline int fls(int x)
{
int r;
return r + 1;
}
-#ifdef CONFIG_UST_GDB_INTEGRATION
-
-#define save_registers(regsptr) \
- asm volatile ( \
- /* save original rsp */ \
- "pushq %%rsp\n\t" \
- /* push original rflags */ \
- "pushfq\n\t" \
- /* rax will hold the ptr to the private stack bottom */ \
- "pushq %%rax\n\t" \
- /* rbx will be used to temporarily hold the stack bottom addr */ \
- "pushq %%rbx\n\t" \
- /* rdi is the input to __tls_get_addr, and also a temp var */ \
- "pushq %%rdi\n\t" \
- /* For TLS access, we have to do function calls. However, \
- * we must not lose the original value of: \
- * rsp, rflags, rax, rbx, rcx, rdx, rsi, rdi, rbp, r8, r9 \
- * r10, r11, r12, r13, r14, r15, cs, ss \
- * \
- * Some registers' original values have already been saved: \
- * rsp, rflags, rax, rbx, rdi \
- * \
- * In addition, the x86-64 ABI says the following registers \
- * belong to the caller function: \
- * rbp, rbx, r12, r13, r14, r15 \
- * \
- * The following registers should not be changed by the callee: \
- * cs, ss \
- * \
- * Therefore, the following registers must be explicitly \
- * preserved: \
- * rcx, rdx, rsi, r8, r9, r10, r11 \
- */ \
- "pushq %%rcx\n\t" \
- "pushq %%rdx\n\t" \
- "pushq %%rsi\n\t" \
- "pushq %%r8\n\t" \
- "pushq %%r9\n\t" \
- "pushq %%r10\n\t" \
- "pushq %%r11\n\t" \
- /* Start TLS access of private reg stack pointer */ \
- ".byte 0x66\n\t" \
- "leaq ust_reg_stack_ptr@tlsgd(%%rip), %%rdi\n\t" \
- ".hword 0x6666\n\t" \
- "rex64\n\t" \
- "call __tls_get_addr@plt\n\t" \
- /* --- End TLS access */ \
- /* check if ust_reg_stack_ptr has been initialized */ \
- "movq (%%rax),%%rbx\n\t" \
- "testq %%rbx,%%rbx\n\t" \
- "jne 1f\n\t" \
- "movq %%rax,%%rbx\n\t" \
- /* Start TLS access of private reg stack */ \
- ".byte 0x66\n\t" \
- "leaq ust_reg_stack@tlsgd(%%rip), %%rdi\n\t" \
- ".hword 0x6666\n\t" \
- "rex64\n\t" \
- "call __tls_get_addr@plt\n\t" \
- /* --- End TLS access */ \
- "addq $500,%%rax\n\t" \
- "movq %%rax,(%%rbx)\n\t" \
- "movq %%rbx,%%rax\n\t" \
- /* now the pointer to the private stack is in rax.
- must add stack size so the ptr points to the stack bottom. */ \
- "1:\n\t" \
- /* Pop regs that were pushed for function calls */ \
- "popq %%r11\n\t" \
- "popq %%r10\n\t" \
- "popq %%r9\n\t" \
- "popq %%r8\n\t" \
- "popq %%rsi\n\t" \
- "popq %%rdx\n\t" \
- "popq %%rcx\n\t" \
- /* Manually push rsp to private stack */ \
- "addq $-8,(%%rax)\n\t" \
- "movq 32(%%rsp), %%rdi\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rdi, (%%rbx)\n\t" \
- /* Manually push eflags to private stack */ \
- "addq $-8,(%%rax)\n\t" \
- "movq 24(%%rsp), %%rdi\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rdi, (%%rbx)\n\t" \
- /* Manually push rax to private stack */ \
- "addq $-8,(%%rax)\n\t" \
- "movq 16(%%rsp), %%rdi\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rdi, (%%rbx)\n\t" \
- /* Manually push rbx to private stack */ \
- "addq $-8,(%%rax)\n\t" \
- "movq 8(%%rsp), %%rdi\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rdi, (%%rbx)\n\t" \
- /* Manually push rdi to private stack */ \
- "addq $-8,(%%rax)\n\t" \
- "movq 0(%%rsp), %%rdi\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rdi, (%%rbx)\n\t" \
- /* now push regs to tls */ \
- /* -- rsp already pushed -- */ \
- /* -- rax already pushed -- */ \
- /* -- rbx already pushed -- */ \
- /* -- rdi already pushed -- */ \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rcx,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rdx,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rbp,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%rsi,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%r8,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%r9,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%r10,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%r11,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%r12,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%r13,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%r14,(%%rbx)\n\t" \
- "addq $-8,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movq %%r15,(%%rbx)\n\t" \
- /* push cs */ \
- "addq $-2,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movw %%cs, (%%rbx)\n\t" \
- /* push ss */ \
- "addq $-2,(%%rax)\n\t" \
- "movq (%%rax), %%rbx\n\t" \
- "movw %%ss, (%%rbx)\n\t" \
- /* add padding for struct registers */ \
- "addq $-4,(%%rax)\n\t" \
- /* restore original values of regs that were used internally */ \
- "popq %%rdi\n\t" \
- "popq %%rbx\n\t" \
- "popq %%rax\n\t" \
- /* cancel push of rsp */ \
- "addq $8,%%rsp\n\t" \
- /* cancel push of rflags */ \
- "addq $8,%%rsp\n\t" \
- ::); \
- memcpy(regsptr, (void *)ust_reg_stack_ptr, sizeof(struct registers)); \
- ust_reg_stack_ptr = (void *)(((long)ust_reg_stack_ptr) + sizeof(struct registers));
-
-#else /* CONFIG_UST_GDB_INTEGRATION */
-
-#define save_registers(a)
-
-#endif /* CONFIG_UST_GDB_INTEGRATION */
-
-/* Macro to insert the address of a relative jump in an assembly stub,
- * in a relocatable way. On x86-64, this uses a special (%rip) notation. */
-#define RELATIVE_ADDRESS(__rel_label__) __rel_label__(%%rip)
-
-#define ARCH_COPY_ADDR(dst) "lea 2b(%%rip)," dst "\n\t"
-
-#define _ASM_PTR ".quad "
-
#elif defined(__PPC__)
-struct registers {
-};
-
static __inline__ int fls(unsigned int x)
{
int lz;
return 32 - lz;
}
-#define ARCH_COPY_ADDR(dst) \
- "lis " dst ",2b@h\n\t" /* load high bytes */ \
- "ori " dst "," dst ",2b@l\n\t" /* load low bytes */
-
-#define _ASM_PTR ".long "
-#define save_registers(a)
-
#else /* arch-agnostic */
static __inline__ int fls(unsigned int x)
#endif
-#ifdef __arm__
-
-struct registers {
-};
-
-#define ARCH_COPY_ADDR(dst) "ldr "dst", =2b\n\t" \
- "b 55f\n\t" \
- ".ltorg\n\t" \
- "55:\n\t"
-
-#define _ASM_PTR ".long "
-#define save_registers(a)
-
-#endif /* __arm__ */
-
#endif /* UST_PROCESSOR_H */
/*
- * Copyright (C) 2007 Mathieu Desnoyers
+ * Copyright (C) 2007-2011 Mathieu Desnoyers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
char *format;
char *name;
/* Probe wrapper */
- void (*call)(const struct ust_marker *mdata, void *call_private, struct registers *regs, ...);
+ void (*call)(const struct ust_marker *mdata, void *call_private, ...);
struct ust_marker_probe_closure single;
struct ust_marker_probe_closure *multi;
int refcount; /* Number of times armed. 0 if disarmed. */
* execution flow of preemptible code.
*/
notrace void __ust_marker_empty_function(const struct ust_marker *mdata,
- void *probe_private, struct registers *regs, void *call_private, const char *fmt, va_list *args)
+ void *probe_private, void *call_private, const char *fmt, va_list *args)
{
}
//ust// EXPORT_SYMBOL_GPL(__ust_marker_empty_function);
* rcu_dereference() for the pointer read.
*/
notrace void ust_marker_probe_cb(const struct ust_marker *mdata,
- void *call_private, struct registers *regs, ...)
+ void *call_private, ...)
{
va_list args;
char ptype;
/* Must read the ptr before private data. They are not data
* dependant, so we put an explicit cmm_smp_rmb() here. */
cmm_smp_rmb();
- va_start(args, regs);
- func(mdata, mdata->single.probe_private, regs, call_private,
+ va_start(args, call_private);
+ func(mdata, mdata->single.probe_private, call_private,
mdata->format, &args);
va_end(args);
} else {
*/
cmm_smp_read_barrier_depends();
for (i = 0; multi[i].func; i++) {
- va_start(args, regs);
+ va_start(args, call_private);
multi[i].func(mdata, multi[i].probe_private,
- regs, call_private, mdata->format, &args);
+ call_private, mdata->format, &args);
va_end(args);
}
}
* Should be connected to ust_marker "UST_MARKER_NOARGS".
*/
static notrace void ust_marker_probe_cb_noarg(const struct ust_marker *mdata,
- void *call_private, struct registers *regs, ...)
+ void *call_private, ...)
{
va_list args; /* not initialized */
char ptype;
/* Must read the ptr before private data. They are not data
* dependant, so we put an explicit cmm_smp_rmb() here. */
cmm_smp_rmb();
- func(mdata, mdata->single.probe_private, regs, call_private,
+ func(mdata, mdata->single.probe_private, call_private,
mdata->format, &args);
} else {
struct ust_marker_probe_closure *multi;
*/
cmm_smp_read_barrier_depends();
for (i = 0; multi[i].func; i++)
- multi[i].func(mdata, multi[i].probe_private, regs,
+ multi[i].func(mdata, multi[i].probe_private,
call_private, mdata->format, &args);
}
//ust// rcu_read_unlock_sched_notrace();
notrace void ltt_vtrace(const struct ust_marker *mdata, void *probe_data,
- struct registers *regs, void *call_data,
+ void *call_data,
const char *fmt, va_list *args)
{
int largest_align, ret;
}
notrace void ltt_trace(const struct ust_marker *mdata, void *probe_data,
- struct registers *regs, void *call_data,
+ void *call_data,
const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
- ltt_vtrace(mdata, probe_data, regs, call_data, fmt, &args);
+ ltt_vtrace(mdata, probe_data, call_data, fmt, &args);
va_end(args);
}
(*iter.ust_marker)->name,
(int)(*iter.ust_marker)->state,
(*iter.ust_marker)->format,
- (*iter.ust_marker)->location);
+ NULL); /*
+ * location is null for now, will be added
+ * to a different table.
+ */
ust_marker_iter_next(&iter);
}
unlock_ust_marker();
struct ust_marker; //ust//
extern void ltt_vtrace(const struct ust_marker *mdata, void *probe_data,
- struct registers *regs, void *call_data, const char *fmt, va_list *args);
+ void *call_data, const char *fmt, va_list *args);
extern void ltt_trace(const struct ust_marker *mdata, void *probe_data,
- struct registers *regs, void *call_data, const char *fmt, ...);
+ void *call_data, const char *fmt, ...);
/*
* Unique ID assigned to each registered probe.
/* This file contains functions for tracepoint custom probes support. */
+#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <urcu/rculist.h>
#include <ust/type-serializer.h>
#include <ust/core.h>
#include <ust/clock.h>
+#include <urcu-bp.h>
#include "tracer.h"
notrace
gcc -g $(LDFLAGS) -fPIC -o libbasic-noscript.so -shared basic_lib_noscript.o /usr/local/lib/libust.so.0 /usr/local/lib/libust-initializer.o
basic_lib.o: basic_lib.c
- gcc -g $(CFLAGS) -DCONFIG_UST_GDB_INTEGRATION -fPIC -c basic_lib.c
+ gcc -g $(CFLAGS) -fPIC -c basic_lib.c
basic_lib_noscript.o: basic_lib.c
- gcc -g -DCONFIG_UST_GDB_INTEGRATION -fPIC -o basic_lib_noscript.o -c basic_lib.c
+ gcc -g -fPIC -o basic_lib_noscript.o -c basic_lib.c
prog: prog.c
- gcc -g -DCONFIG_UST_GDB_INTEGRATION $(CFLAGS) $(LDFLAGS) -o prog -L . -lbasic -lust prog.c
+ gcc -g $(CFLAGS) $(LDFLAGS) -o prog -L . -lbasic -lust prog.c
prog_noscript: prog.c
- gcc -g -DCONFIG_UST_GDB_INTEGRATION -o prog_noscript -L . -lbasic-noscript prog.c /usr/local/lib/libust.so.0 /usr/local/lib/libust-initializer.o
+ gcc -g -o prog_noscript -L . -lbasic-noscript prog.c /usr/local/lib/libust.so.0 /usr/local/lib/libust-initializer.o
.PHONY: clean
clean:
projects / lttng-ust.git / commitdiff
