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openSUSE:Leap:42.3:Staging:D
gdb
gdb-linux_perf-bundle.patch
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File gdb-linux_perf-bundle.patch of Package gdb
Index: gdb-7.11.90.20160904/gdb/nat/linux-btrace.h =================================================================== --- gdb-7.11.90.20160904.orig/gdb/nat/linux-btrace.h 2016-09-04 04:02:13.000000000 +0200 +++ gdb-7.11.90.20160904/gdb/nat/linux-btrace.h 2016-09-04 20:11:47.375275492 +0200 @@ -28,6 +28,177 @@ # include <linux/perf_event.h> #endif +#ifdef PERF_ATTR_SIZE_VER5_BUNDLE +#ifndef HAVE_LINUX_PERF_EVENT_H +# error "PERF_ATTR_SIZE_VER5_BUNDLE && !HAVE_LINUX_PERF_EVENT_H" +#endif +#ifndef PERF_ATTR_SIZE_VER5 +#define PERF_ATTR_SIZE_VER5 +#define perf_event_mmap_page perf_event_mmap_page_bundle +// kernel-headers-3.10.0-493.el7.x86_64/usr/include/linux/perf_event.h +/* + * Structure of the page that can be mapped via mmap + */ +struct perf_event_mmap_page { + __u32 version; /* version number of this structure */ + __u32 compat_version; /* lowest version this is compat with */ + + /* + * Bits needed to read the hw events in user-space. + * + * u32 seq, time_mult, time_shift, index, width; + * u64 count, enabled, running; + * u64 cyc, time_offset; + * s64 pmc = 0; + * + * do { + * seq = pc->lock; + * barrier() + * + * enabled = pc->time_enabled; + * running = pc->time_running; + * + * if (pc->cap_usr_time && enabled != running) { + * cyc = rdtsc(); + * time_offset = pc->time_offset; + * time_mult = pc->time_mult; + * time_shift = pc->time_shift; + * } + * + * index = pc->index; + * count = pc->offset; + * if (pc->cap_user_rdpmc && index) { + * width = pc->pmc_width; + * pmc = rdpmc(index - 1); + * } + * + * barrier(); + * } while (pc->lock != seq); + * + * NOTE: for obvious reason this only works on self-monitoring + * processes. + */ + __u32 lock; /* seqlock for synchronization */ + __u32 index; /* hardware event identifier */ + __s64 offset; /* add to hardware event value */ + __u64 time_enabled; /* time event active */ + __u64 time_running; /* time event on cpu */ + union { + __u64 capabilities; + struct { + __u64 cap_bit0 : 1, /* Always 0, deprecated, see commit 860f085b74e9 */ + cap_bit0_is_deprecated : 1, /* Always 1, signals that bit 0 is zero */ + + cap_user_rdpmc : 1, /* The RDPMC instruction can be used to read counts */ + cap_user_time : 1, /* The time_* fields are used */ + cap_user_time_zero : 1, /* The time_zero field is used */ + cap_____res : 59; + }; + }; + + /* + * If cap_user_rdpmc this field provides the bit-width of the value + * read using the rdpmc() or equivalent instruction. This can be used + * to sign extend the result like: + * + * pmc <<= 64 - width; + * pmc >>= 64 - width; // signed shift right + * count += pmc; + */ + __u16 pmc_width; + + /* + * If cap_usr_time the below fields can be used to compute the time + * delta since time_enabled (in ns) using rdtsc or similar. + * + * u64 quot, rem; + * u64 delta; + * + * quot = (cyc >> time_shift); + * rem = cyc & (((u64)1 << time_shift) - 1); + * delta = time_offset + quot * time_mult + + * ((rem * time_mult) >> time_shift); + * + * Where time_offset,time_mult,time_shift and cyc are read in the + * seqcount loop described above. This delta can then be added to + * enabled and possible running (if index), improving the scaling: + * + * enabled += delta; + * if (index) + * running += delta; + * + * quot = count / running; + * rem = count % running; + * count = quot * enabled + (rem * enabled) / running; + */ + __u16 time_shift; + __u32 time_mult; + __u64 time_offset; + /* + * If cap_usr_time_zero, the hardware clock (e.g. TSC) can be calculated + * from sample timestamps. + * + * time = timestamp - time_zero; + * quot = time / time_mult; + * rem = time % time_mult; + * cyc = (quot << time_shift) + (rem << time_shift) / time_mult; + * + * And vice versa: + * + * quot = cyc >> time_shift; + * rem = cyc & (((u64)1 << time_shift) - 1); + * timestamp = time_zero + quot * time_mult + + * ((rem * time_mult) >> time_shift); + */ + __u64 time_zero; + __u32 size; /* Header size up to __reserved[] fields. */ + + /* + * Hole for extension of the self monitor capabilities + */ + + __u8 __reserved[118*8+4]; /* align to 1k. */ + + /* + * Control data for the mmap() data buffer. + * + * User-space reading the @data_head value should issue an smp_rmb(), + * after reading this value. + * + * When the mapping is PROT_WRITE the @data_tail value should be + * written by userspace to reflect the last read data, after issueing + * an smp_mb() to separate the data read from the ->data_tail store. + * In this case the kernel will not over-write unread data. + * + * See perf_output_put_handle() for the data ordering. + * + * data_{offset,size} indicate the location and size of the perf record + * buffer within the mmapped area. + */ + __u64 data_head; /* head in the data section */ + __u64 data_tail; /* user-space written tail */ + __u64 data_offset; /* where the buffer starts */ + __u64 data_size; /* data buffer size */ + + /* + * AUX area is defined by aux_{offset,size} fields that should be set + * by the userspace, so that + * + * aux_offset >= data_offset + data_size + * + * prior to mmap()ing it. Size of the mmap()ed area should be aux_size. + * + * Ring buffer pointers aux_{head,tail} have the same semantics as + * data_{head,tail} and same ordering rules apply. + */ + __u64 aux_head; + __u64 aux_tail; + __u64 aux_offset; + __u64 aux_size; +}; +#endif // PERF_ATTR_SIZE_VER5 +#endif // PERF_ATTR_SIZE_VER5_BUNDLE + struct target_ops; #if HAVE_LINUX_PERF_EVENT_H Index: gdb-7.11.90.20160904/gdb/configure =================================================================== --- gdb-7.11.90.20160904.orig/gdb/configure 2016-09-04 20:11:47.238274285 +0200 +++ gdb-7.11.90.20160904/gdb/configure 2016-09-04 20:11:47.378275519 +0200 @@ -10601,7 +10601,7 @@ #include <linux/perf_event.h> #ifndef PERF_ATTR_SIZE_VER5 -# error +// error // PERF_ATTR_SIZE_VER5_BUNDLE is not available here - Fedora+RHEL #endif _ACEOF Index: gdb-7.11.90.20160904/gdb/configure.ac =================================================================== --- gdb-7.11.90.20160904.orig/gdb/configure.ac 2016-09-04 20:11:47.238274285 +0200 +++ gdb-7.11.90.20160904/gdb/configure.ac 2016-09-04 20:11:47.379275528 +0200 @@ -1461,7 +1461,7 @@ AC_PREPROC_IFELSE(AC_LANG_SOURCE([[ #include <linux/perf_event.h> #ifndef PERF_ATTR_SIZE_VER5 -# error +// error // PERF_ATTR_SIZE_VER5_BUNDLE is not available here - Fedora+RHEL #endif ]]), [perf_event=yes], [perf_event=no]) if test "$perf_event" != yes; then Index: gdb-7.11.90.20160904/gdb/gdb.c =================================================================== --- gdb-7.11.90.20160904.orig/gdb/gdb.c 2016-09-04 04:02:13.000000000 +0200 +++ gdb-7.11.90.20160904/gdb/gdb.c 2016-09-04 20:12:28.018633552 +0200 @@ -20,11 +20,19 @@ #include "main.h" #include "interps.h" +#ifdef PERF_ATTR_SIZE_VER5_BUNDLE +extern "C" void __libipt_init(void); +#endif + int main (int argc, char **argv) { struct captured_main_args args; +#ifdef PERF_ATTR_SIZE_VER5_BUNDLE + __libipt_init(); +#endif + memset (&args, 0, sizeof args); args.argc = argc; args.argv = argv;
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