dwarves: Add an rbtree for the functions in a cu
That is used by cus__find_function_by_addr & cu__func_function_by_addr. First user is pfunct --addr, but this is really for pfunct --annotate, that will process a perf.data file generated by 'perf report', load the debugging info and regenerate the functions (pfunct -TVi like) that had hits, using libdisasm to show the assembly code, etc. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
dd8c983b40
commit
e429f8efbb
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@ -34,7 +34,7 @@ _set_fancy(LIB_INSTALL_DIR "${EXEC_INSTALL_PREFIX}${CMAKE_INSTALL_PREFIX}/${__LI
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set(dwarves_LIB_SRCS dwarves.c dwarves_fprintf.c gobuffer strings
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set(dwarves_LIB_SRCS dwarves.c dwarves_fprintf.c gobuffer strings
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ctf_encoder.c ctf_loader.c libctf.c dwarf_loader.c
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ctf_encoder.c ctf_loader.c libctf.c dwarf_loader.c
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dutil.c elf_symtab.c)
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dutil.c elf_symtab.c rbtree.c)
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add_library(dwarves SHARED ${dwarves_LIB_SRCS})
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add_library(dwarves SHARED ${dwarves_LIB_SRCS})
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set_target_properties(dwarves PROPERTIES VERSION 1.0.0 SOVERSION 1)
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set_target_properties(dwarves PROPERTIES VERSION 1.0.0 SOVERSION 1)
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target_link_libraries(dwarves ${DWARF_LIBRARIES} ${ZLIB_LIBRARIES})
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target_link_libraries(dwarves ${DWARF_LIBRARIES} ${ZLIB_LIBRARIES})
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@ -91,7 +91,7 @@ install(TARGETS codiff ctracer dtagnames pahole pdwtags
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install(TARGETS dwarves LIBRARY DESTINATION ${LIB_INSTALL_DIR})
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install(TARGETS dwarves LIBRARY DESTINATION ${LIB_INSTALL_DIR})
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install(TARGETS dwarves dwarves_emit dwarves_reorganize LIBRARY DESTINATION ${LIB_INSTALL_DIR})
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install(TARGETS dwarves dwarves_emit dwarves_reorganize LIBRARY DESTINATION ${LIB_INSTALL_DIR})
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install(FILES dwarves.h dwarves_emit.h dwarves_reorganize.h
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install(FILES dwarves.h dwarves_emit.h dwarves_reorganize.h
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dutil.h gobuffer.h list.h strings.h
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dutil.h gobuffer.h list.h rbtree.h strings.h
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DESTINATION ${CMAKE_INSTALL_PREFIX}/include/dwarves/)
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DESTINATION ${CMAKE_INSTALL_PREFIX}/include/dwarves/)
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install(FILES man-pages/pahole.1 DESTINATION ${CMAKE_INSTALL_PREFIX}/share/man/man1/)
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install(FILES man-pages/pahole.1 DESTINATION ${CMAKE_INSTALL_PREFIX}/share/man/man1/)
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install(PROGRAMS ostra/ostra-cg DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
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install(PROGRAMS ostra/ostra-cg DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
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2
MANIFEST
2
MANIFEST
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@ -28,6 +28,8 @@ pdwtags.c
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pfunct.c
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pfunct.c
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pglobal.c
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pglobal.c
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prefcnt.c
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prefcnt.c
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rbtree.c
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rbtree.h
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syscse.c
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syscse.c
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strings.c
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strings.c
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strings.h
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strings.h
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77
dwarves.c
77
dwarves.c
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@ -369,13 +369,36 @@ static void *ptr_table__entry(const struct ptr_table *self, uint32_t id)
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return id >= self->nr_entries ? NULL : self->entries[id];
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return id >= self->nr_entries ? NULL : self->entries[id];
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}
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}
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static void cu__insert_function(struct cu *self, struct tag *tag)
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{
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struct function *function = tag__function(tag);
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struct rb_node **p = &self->functions.rb_node;
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struct rb_node *parent = NULL;
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struct function *f;
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while (*p != NULL) {
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parent = *p;
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f = rb_entry(parent, struct function, rb_node);
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if (function->lexblock.low_pc < f->lexblock.low_pc)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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rb_link_node(&function->rb_node, parent, p);
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rb_insert_color(&function->rb_node, &self->functions);
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}
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int cu__table_add_tag(struct cu *self, struct tag *tag, long *id)
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int cu__table_add_tag(struct cu *self, struct tag *tag, long *id)
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{
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{
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struct ptr_table *pt = tag__is_tag_type(tag) ?
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struct ptr_table *pt = &self->tags_table;
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&self->types_table :
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tag__is_function(tag) ?
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if (tag__is_tag_type(tag))
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&self->functions_table :
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pt = &self->types_table;
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&self->tags_table;
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else if (tag__is_function(tag)) {
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pt = &self->functions_table;
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cu__insert_function(self, tag);
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}
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if (*id < 0) {
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if (*id < 0) {
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*id = ptr_table__add(pt, tag);
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*id = ptr_table__add(pt, tag);
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if (*id < 0)
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if (*id < 0)
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@ -422,6 +445,8 @@ struct cu *cu__new(const char *name, uint8_t addr_size,
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if (ptr_table__add(&self->types_table, NULL) < 0)
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if (ptr_table__add(&self->types_table, NULL) < 0)
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goto out_free_name;
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goto out_free_name;
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self->functions = RB_ROOT;
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self->dfops = NULL;
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self->dfops = NULL;
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INIT_LIST_HEAD(&self->tags);
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INIT_LIST_HEAD(&self->tags);
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INIT_LIST_HEAD(&self->tool_list);
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INIT_LIST_HEAD(&self->tool_list);
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@ -688,6 +713,48 @@ struct tag *cus__find_struct_by_name(const struct cus *self,
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return NULL;
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return NULL;
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}
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}
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struct function *cu__find_function_at_addr(const struct cu *self,
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uint64_t addr)
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{
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struct rb_node *n;
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if (self == NULL)
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return NULL;
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n = self->functions.rb_node;
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while (n) {
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struct function *f = rb_entry(n, struct function, rb_node);
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if (addr < f->lexblock.low_pc)
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n = n->rb_left;
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else if (addr >= f->lexblock.low_pc + f->lexblock.size)
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n = n->rb_right;
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else
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return f;
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}
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return NULL;
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}
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struct function *cus__find_function_at_addr(const struct cus *self,
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uint64_t addr, struct cu **cu)
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{
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struct cu *pos;
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list_for_each_entry(pos, &self->cus, node) {
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struct function *f = cu__find_function_at_addr(pos, addr);
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if (f != NULL) {
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if (cu != NULL)
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*cu = pos;
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return f;
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}
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}
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return NULL;
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}
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struct cu *cus__find_cu_by_name(const struct cus *self, const char *name)
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struct cu *cus__find_cu_by_name(const struct cus *self, const char *name)
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{
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{
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struct cu *pos;
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struct cu *pos;
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@ -17,6 +17,7 @@
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#include "dutil.h"
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#include "dutil.h"
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#include "list.h"
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#include "list.h"
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#include "rbtree.h"
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#include "strings.h"
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#include "strings.h"
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struct cu;
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struct cu;
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@ -86,6 +87,8 @@ struct cu *cus__find_cu_by_name(const struct cus *self, const char *name);
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struct tag *cus__find_struct_by_name(const struct cus *self, struct cu **cu,
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struct tag *cus__find_struct_by_name(const struct cus *self, struct cu **cu,
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const char *name, const int include_decls,
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const char *name, const int include_decls,
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uint16_t *id);
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uint16_t *id);
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struct function *cus__find_function_at_addr(const struct cus *self,
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uint64_t addr, struct cu **cu);
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void cus__for_each_cu(struct cus *self, int (*iterator)(struct cu *cu,
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void cus__for_each_cu(struct cus *self, int (*iterator)(struct cu *cu,
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void *cookie),
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void *cookie),
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void *cookie,
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void *cookie,
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@ -146,6 +149,7 @@ struct cu {
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struct ptr_table types_table;
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struct ptr_table types_table;
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struct ptr_table functions_table;
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struct ptr_table functions_table;
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struct ptr_table tags_table;
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struct ptr_table tags_table;
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struct rb_root functions;
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char *name;
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char *name;
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char *filename;
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char *filename;
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void *priv;
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void *priv;
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@ -264,6 +268,8 @@ struct tag *cu__find_first_typedef_of_type(const struct cu *self,
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struct tag *cu__find_function_by_name(const struct cu *cu, const char *name);
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struct tag *cu__find_function_by_name(const struct cu *cu, const char *name);
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struct tag *cu__find_struct_by_sname(const struct cu *self, strings_t sname,
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struct tag *cu__find_struct_by_sname(const struct cu *self, strings_t sname,
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const int include_decls, uint16_t *idp);
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const int include_decls, uint16_t *idp);
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struct function *cu__find_function_at_addr(const struct cu *self,
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uint64_t addr);
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struct tag *cu__function(const struct cu *self, const uint32_t id);
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struct tag *cu__function(const struct cu *self, const uint32_t id);
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struct tag *cu__tag(const struct cu *self, const uint32_t id);
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struct tag *cu__tag(const struct cu *self, const uint32_t id);
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struct tag *cu__type(const struct cu *self, const uint16_t id);
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struct tag *cu__type(const struct cu *self, const uint16_t id);
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@ -621,6 +627,7 @@ int ftype__has_parm_of_type(const struct ftype *self, const uint16_t target,
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struct function {
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struct function {
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struct ftype proto;
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struct ftype proto;
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struct lexblock lexblock;
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struct lexblock lexblock;
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struct rb_node rb_node;
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strings_t name;
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strings_t name;
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strings_t linkage_name;
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strings_t linkage_name;
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uint32_t cu_total_size_inline_expansions;
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uint32_t cu_total_size_inline_expansions;
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43
pfunct.c
43
pfunct.c
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@ -32,6 +32,7 @@ static int show_cc_uninlined;
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static char *symtab_name;
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static char *symtab_name;
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static bool expand_types;
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static bool expand_types;
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static struct type_emissions emissions;
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static struct type_emissions emissions;
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static uint64_t addr;
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static struct conf_fprintf conf;
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static struct conf_fprintf conf;
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@ -340,7 +341,19 @@ static int function__emit_type_definitions(struct function *self,
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return 0;
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return 0;
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}
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}
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static int cu_function_iterator(struct cu*cu, void *cookie)
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static void function__show(struct function *self, struct cu *cu)
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{
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struct tag *tag = function__tag(self);
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if (expand_types)
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function__emit_type_definitions(self, cu, stdout);
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tag__fprintf(tag, cu, &conf, stdout);
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putchar('\n');
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if (show_variables || show_inline_expansions)
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function__fprintf_stats(tag, cu, &conf, stdout);
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}
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static int cu_function_iterator(struct cu *cu, void *cookie)
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{
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{
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struct function *function;
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struct function *function;
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uint32_t id;
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uint32_t id;
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@ -348,14 +361,7 @@ static int cu_function_iterator(struct cu*cu, void *cookie)
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cu__for_each_function(cu, id, function) {
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cu__for_each_function(cu, id, function) {
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if (strcmp(function__name(function, cu), cookie) != 0)
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if (strcmp(function__name(function, cu), cookie) != 0)
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continue;
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continue;
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function__show(function, cu);
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if (expand_types)
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function__emit_type_definitions(function, cu, stdout);
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tag__fprintf(function__tag(function), cu, &conf, stdout);
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putchar('\n');
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if (show_variables || show_inline_expansions)
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function__fprintf_stats(function__tag(function), cu,
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&conf, stdout);
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return 1;
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return 1;
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}
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}
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return 0;
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return 0;
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@ -449,6 +455,12 @@ ARGP_PROGRAM_VERSION_HOOK_DEF = dwarves_print_version;
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#define ARGP_no_parm_names 301
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#define ARGP_no_parm_names 301
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static const struct argp_option pfunct__options[] = {
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static const struct argp_option pfunct__options[] = {
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{
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.key = 'a',
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.name = "addr",
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.arg = "ADDR",
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.doc = "show just the function that where ADDR is",
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},
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{
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{
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.key = 'b',
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.key = 'b',
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.name = "expand_types",
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.name = "expand_types",
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@ -572,6 +584,7 @@ static error_t pfunct__options_parser(int key, char *arg,
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if (state->child_inputs != NULL)
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if (state->child_inputs != NULL)
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state->child_inputs[0] = state->input;
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state->child_inputs[0] = state->input;
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break;
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break;
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case 'a': addr = strtoull(arg, NULL, 0); break;
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case 'b': expand_types = true;
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case 'b': expand_types = true;
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type_emissions__init(&emissions); break;
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type_emissions__init(&emissions); break;
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case 'c': class_name = arg; break;
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case 'c': class_name = arg; break;
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@ -640,7 +653,17 @@ int main(int argc, char *argv[])
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cus__for_each_cu(cus, cu_unique_iterator, NULL, NULL);
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cus__for_each_cu(cus, cu_unique_iterator, NULL, NULL);
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if (show_total_inline_expansion_stats)
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if (addr) {
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struct cu *cu;
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struct function *f = cus__find_function_at_addr(cus, addr, &cu);
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if (f == NULL) {
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fprintf(stderr, "pfunct: No function found at %#llx!\n",
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(unsigned long long)addr);
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goto out_cus_delete;
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}
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function__show(f, cu);
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} else if (show_total_inline_expansion_stats)
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print_total_inline_stats();
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print_total_inline_stats();
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else if (class_name != NULL)
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else if (class_name != NULL)
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cus__for_each_cu(cus, cu_class_iterator, class_name, NULL);
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cus__for_each_cu(cus, cu_class_iterator, class_name, NULL);
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@ -0,0 +1,383 @@
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/*
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Red Black Trees
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(C) 1999 Andrea Arcangeli <andrea@suse.de>
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(C) 2002 David Woodhouse <dwmw2@infradead.org>
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|
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This program is free software; you can redistribute it and/or modify
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|
it under the terms of the GNU General Public License as published by
|
||||||
|
the Free Software Foundation; either version 2 of the License, or
|
||||||
|
(at your option) any later version.
|
||||||
|
|
||||||
|
This program is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
GNU General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with this program; if not, write to the Free Software
|
||||||
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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|
|
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linux/lib/rbtree.c
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*/
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#include "rbtree.h"
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static void __rb_rotate_left(struct rb_node *node, struct rb_root *root)
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{
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struct rb_node *right = node->rb_right;
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struct rb_node *parent = rb_parent(node);
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if ((node->rb_right = right->rb_left))
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rb_set_parent(right->rb_left, node);
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right->rb_left = node;
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rb_set_parent(right, parent);
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|
|
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if (parent)
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||||||
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{
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if (node == parent->rb_left)
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parent->rb_left = right;
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else
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parent->rb_right = right;
|
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}
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else
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root->rb_node = right;
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rb_set_parent(node, right);
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||||||
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}
|
||||||
|
|
||||||
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static void __rb_rotate_right(struct rb_node *node, struct rb_root *root)
|
||||||
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{
|
||||||
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struct rb_node *left = node->rb_left;
|
||||||
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struct rb_node *parent = rb_parent(node);
|
||||||
|
|
||||||
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if ((node->rb_left = left->rb_right))
|
||||||
|
rb_set_parent(left->rb_right, node);
|
||||||
|
left->rb_right = node;
|
||||||
|
|
||||||
|
rb_set_parent(left, parent);
|
||||||
|
|
||||||
|
if (parent)
|
||||||
|
{
|
||||||
|
if (node == parent->rb_right)
|
||||||
|
parent->rb_right = left;
|
||||||
|
else
|
||||||
|
parent->rb_left = left;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
root->rb_node = left;
|
||||||
|
rb_set_parent(node, left);
|
||||||
|
}
|
||||||
|
|
||||||
|
void rb_insert_color(struct rb_node *node, struct rb_root *root)
|
||||||
|
{
|
||||||
|
struct rb_node *parent, *gparent;
|
||||||
|
|
||||||
|
while ((parent = rb_parent(node)) && rb_is_red(parent))
|
||||||
|
{
|
||||||
|
gparent = rb_parent(parent);
|
||||||
|
|
||||||
|
if (parent == gparent->rb_left)
|
||||||
|
{
|
||||||
|
{
|
||||||
|
register struct rb_node *uncle = gparent->rb_right;
|
||||||
|
if (uncle && rb_is_red(uncle))
|
||||||
|
{
|
||||||
|
rb_set_black(uncle);
|
||||||
|
rb_set_black(parent);
|
||||||
|
rb_set_red(gparent);
|
||||||
|
node = gparent;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (parent->rb_right == node)
|
||||||
|
{
|
||||||
|
register struct rb_node *tmp;
|
||||||
|
__rb_rotate_left(parent, root);
|
||||||
|
tmp = parent;
|
||||||
|
parent = node;
|
||||||
|
node = tmp;
|
||||||
|
}
|
||||||
|
|
||||||
|
rb_set_black(parent);
|
||||||
|
rb_set_red(gparent);
|
||||||
|
__rb_rotate_right(gparent, root);
|
||||||
|
} else {
|
||||||
|
{
|
||||||
|
register struct rb_node *uncle = gparent->rb_left;
|
||||||
|
if (uncle && rb_is_red(uncle))
|
||||||
|
{
|
||||||
|
rb_set_black(uncle);
|
||||||
|
rb_set_black(parent);
|
||||||
|
rb_set_red(gparent);
|
||||||
|
node = gparent;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (parent->rb_left == node)
|
||||||
|
{
|
||||||
|
register struct rb_node *tmp;
|
||||||
|
__rb_rotate_right(parent, root);
|
||||||
|
tmp = parent;
|
||||||
|
parent = node;
|
||||||
|
node = tmp;
|
||||||
|
}
|
||||||
|
|
||||||
|
rb_set_black(parent);
|
||||||
|
rb_set_red(gparent);
|
||||||
|
__rb_rotate_left(gparent, root);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
rb_set_black(root->rb_node);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __rb_erase_color(struct rb_node *node, struct rb_node *parent,
|
||||||
|
struct rb_root *root)
|
||||||
|
{
|
||||||
|
struct rb_node *other;
|
||||||
|
|
||||||
|
while ((!node || rb_is_black(node)) && node != root->rb_node)
|
||||||
|
{
|
||||||
|
if (parent->rb_left == node)
|
||||||
|
{
|
||||||
|
other = parent->rb_right;
|
||||||
|
if (rb_is_red(other))
|
||||||
|
{
|
||||||
|
rb_set_black(other);
|
||||||
|
rb_set_red(parent);
|
||||||
|
__rb_rotate_left(parent, root);
|
||||||
|
other = parent->rb_right;
|
||||||
|
}
|
||||||
|
if ((!other->rb_left || rb_is_black(other->rb_left)) &&
|
||||||
|
(!other->rb_right || rb_is_black(other->rb_right)))
|
||||||
|
{
|
||||||
|
rb_set_red(other);
|
||||||
|
node = parent;
|
||||||
|
parent = rb_parent(node);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
if (!other->rb_right || rb_is_black(other->rb_right))
|
||||||
|
{
|
||||||
|
rb_set_black(other->rb_left);
|
||||||
|
rb_set_red(other);
|
||||||
|
__rb_rotate_right(other, root);
|
||||||
|
other = parent->rb_right;
|
||||||
|
}
|
||||||
|
rb_set_color(other, rb_color(parent));
|
||||||
|
rb_set_black(parent);
|
||||||
|
rb_set_black(other->rb_right);
|
||||||
|
__rb_rotate_left(parent, root);
|
||||||
|
node = root->rb_node;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
other = parent->rb_left;
|
||||||
|
if (rb_is_red(other))
|
||||||
|
{
|
||||||
|
rb_set_black(other);
|
||||||
|
rb_set_red(parent);
|
||||||
|
__rb_rotate_right(parent, root);
|
||||||
|
other = parent->rb_left;
|
||||||
|
}
|
||||||
|
if ((!other->rb_left || rb_is_black(other->rb_left)) &&
|
||||||
|
(!other->rb_right || rb_is_black(other->rb_right)))
|
||||||
|
{
|
||||||
|
rb_set_red(other);
|
||||||
|
node = parent;
|
||||||
|
parent = rb_parent(node);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
if (!other->rb_left || rb_is_black(other->rb_left))
|
||||||
|
{
|
||||||
|
rb_set_black(other->rb_right);
|
||||||
|
rb_set_red(other);
|
||||||
|
__rb_rotate_left(other, root);
|
||||||
|
other = parent->rb_left;
|
||||||
|
}
|
||||||
|
rb_set_color(other, rb_color(parent));
|
||||||
|
rb_set_black(parent);
|
||||||
|
rb_set_black(other->rb_left);
|
||||||
|
__rb_rotate_right(parent, root);
|
||||||
|
node = root->rb_node;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (node)
|
||||||
|
rb_set_black(node);
|
||||||
|
}
|
||||||
|
|
||||||
|
void rb_erase(struct rb_node *node, struct rb_root *root)
|
||||||
|
{
|
||||||
|
struct rb_node *child, *parent;
|
||||||
|
int color;
|
||||||
|
|
||||||
|
if (!node->rb_left)
|
||||||
|
child = node->rb_right;
|
||||||
|
else if (!node->rb_right)
|
||||||
|
child = node->rb_left;
|
||||||
|
else
|
||||||
|
{
|
||||||
|
struct rb_node *old = node, *left;
|
||||||
|
|
||||||
|
node = node->rb_right;
|
||||||
|
while ((left = node->rb_left) != NULL)
|
||||||
|
node = left;
|
||||||
|
child = node->rb_right;
|
||||||
|
parent = rb_parent(node);
|
||||||
|
color = rb_color(node);
|
||||||
|
|
||||||
|
if (child)
|
||||||
|
rb_set_parent(child, parent);
|
||||||
|
if (parent == old) {
|
||||||
|
parent->rb_right = child;
|
||||||
|
parent = node;
|
||||||
|
} else
|
||||||
|
parent->rb_left = child;
|
||||||
|
|
||||||
|
node->rb_parent_color = old->rb_parent_color;
|
||||||
|
node->rb_right = old->rb_right;
|
||||||
|
node->rb_left = old->rb_left;
|
||||||
|
|
||||||
|
if (rb_parent(old))
|
||||||
|
{
|
||||||
|
if (rb_parent(old)->rb_left == old)
|
||||||
|
rb_parent(old)->rb_left = node;
|
||||||
|
else
|
||||||
|
rb_parent(old)->rb_right = node;
|
||||||
|
} else
|
||||||
|
root->rb_node = node;
|
||||||
|
|
||||||
|
rb_set_parent(old->rb_left, node);
|
||||||
|
if (old->rb_right)
|
||||||
|
rb_set_parent(old->rb_right, node);
|
||||||
|
goto color;
|
||||||
|
}
|
||||||
|
|
||||||
|
parent = rb_parent(node);
|
||||||
|
color = rb_color(node);
|
||||||
|
|
||||||
|
if (child)
|
||||||
|
rb_set_parent(child, parent);
|
||||||
|
if (parent)
|
||||||
|
{
|
||||||
|
if (parent->rb_left == node)
|
||||||
|
parent->rb_left = child;
|
||||||
|
else
|
||||||
|
parent->rb_right = child;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
root->rb_node = child;
|
||||||
|
|
||||||
|
color:
|
||||||
|
if (color == RB_BLACK)
|
||||||
|
__rb_erase_color(child, parent, root);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* This function returns the first node (in sort order) of the tree.
|
||||||
|
*/
|
||||||
|
struct rb_node *rb_first(const struct rb_root *root)
|
||||||
|
{
|
||||||
|
struct rb_node *n;
|
||||||
|
|
||||||
|
n = root->rb_node;
|
||||||
|
if (!n)
|
||||||
|
return NULL;
|
||||||
|
while (n->rb_left)
|
||||||
|
n = n->rb_left;
|
||||||
|
return n;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct rb_node *rb_last(const struct rb_root *root)
|
||||||
|
{
|
||||||
|
struct rb_node *n;
|
||||||
|
|
||||||
|
n = root->rb_node;
|
||||||
|
if (!n)
|
||||||
|
return NULL;
|
||||||
|
while (n->rb_right)
|
||||||
|
n = n->rb_right;
|
||||||
|
return n;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct rb_node *rb_next(const struct rb_node *node)
|
||||||
|
{
|
||||||
|
struct rb_node *parent;
|
||||||
|
|
||||||
|
if (rb_parent(node) == node)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
/* If we have a right-hand child, go down and then left as far
|
||||||
|
as we can. */
|
||||||
|
if (node->rb_right) {
|
||||||
|
node = node->rb_right;
|
||||||
|
while (node->rb_left)
|
||||||
|
node=node->rb_left;
|
||||||
|
return (struct rb_node *)node;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* No right-hand children. Everything down and left is
|
||||||
|
smaller than us, so any 'next' node must be in the general
|
||||||
|
direction of our parent. Go up the tree; any time the
|
||||||
|
ancestor is a right-hand child of its parent, keep going
|
||||||
|
up. First time it's a left-hand child of its parent, said
|
||||||
|
parent is our 'next' node. */
|
||||||
|
while ((parent = rb_parent(node)) && node == parent->rb_right)
|
||||||
|
node = parent;
|
||||||
|
|
||||||
|
return parent;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct rb_node *rb_prev(const struct rb_node *node)
|
||||||
|
{
|
||||||
|
struct rb_node *parent;
|
||||||
|
|
||||||
|
if (rb_parent(node) == node)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
/* If we have a left-hand child, go down and then right as far
|
||||||
|
as we can. */
|
||||||
|
if (node->rb_left) {
|
||||||
|
node = node->rb_left;
|
||||||
|
while (node->rb_right)
|
||||||
|
node=node->rb_right;
|
||||||
|
return (struct rb_node *)node;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* No left-hand children. Go up till we find an ancestor which
|
||||||
|
is a right-hand child of its parent */
|
||||||
|
while ((parent = rb_parent(node)) && node == parent->rb_left)
|
||||||
|
node = parent;
|
||||||
|
|
||||||
|
return parent;
|
||||||
|
}
|
||||||
|
|
||||||
|
void rb_replace_node(struct rb_node *victim, struct rb_node *new,
|
||||||
|
struct rb_root *root)
|
||||||
|
{
|
||||||
|
struct rb_node *parent = rb_parent(victim);
|
||||||
|
|
||||||
|
/* Set the surrounding nodes to point to the replacement */
|
||||||
|
if (parent) {
|
||||||
|
if (victim == parent->rb_left)
|
||||||
|
parent->rb_left = new;
|
||||||
|
else
|
||||||
|
parent->rb_right = new;
|
||||||
|
} else {
|
||||||
|
root->rb_node = new;
|
||||||
|
}
|
||||||
|
if (victim->rb_left)
|
||||||
|
rb_set_parent(victim->rb_left, new);
|
||||||
|
if (victim->rb_right)
|
||||||
|
rb_set_parent(victim->rb_right, new);
|
||||||
|
|
||||||
|
/* Copy the pointers/colour from the victim to the replacement */
|
||||||
|
*new = *victim;
|
||||||
|
}
|
|
@ -0,0 +1,171 @@
|
||||||
|
/*
|
||||||
|
Red Black Trees
|
||||||
|
(C) 1999 Andrea Arcangeli <andrea@suse.de>
|
||||||
|
|
||||||
|
This program is free software; you can redistribute it and/or modify
|
||||||
|
it under the terms of the GNU General Public License as published by
|
||||||
|
the Free Software Foundation; either version 2 of the License, or
|
||||||
|
(at your option) any later version.
|
||||||
|
|
||||||
|
This program is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
GNU General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with this program; if not, write to the Free Software
|
||||||
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
|
||||||
|
linux/include/linux/rbtree.h
|
||||||
|
|
||||||
|
To use rbtrees you'll have to implement your own insert and search cores.
|
||||||
|
This will avoid us to use callbacks and to drop drammatically performances.
|
||||||
|
I know it's not the cleaner way, but in C (not in C++) to get
|
||||||
|
performances and genericity...
|
||||||
|
|
||||||
|
Some example of insert and search follows here. The search is a plain
|
||||||
|
normal search over an ordered tree. The insert instead must be implemented
|
||||||
|
int two steps: as first thing the code must insert the element in
|
||||||
|
order as a red leaf in the tree, then the support library function
|
||||||
|
rb_insert_color() must be called. Such function will do the
|
||||||
|
not trivial work to rebalance the rbtree if necessary.
|
||||||
|
|
||||||
|
-----------------------------------------------------------------------
|
||||||
|
static inline struct page * rb_search_page_cache(struct inode * inode,
|
||||||
|
unsigned long offset)
|
||||||
|
{
|
||||||
|
struct rb_node * n = inode->i_rb_page_cache.rb_node;
|
||||||
|
struct page * page;
|
||||||
|
|
||||||
|
while (n)
|
||||||
|
{
|
||||||
|
page = rb_entry(n, struct page, rb_page_cache);
|
||||||
|
|
||||||
|
if (offset < page->offset)
|
||||||
|
n = n->rb_left;
|
||||||
|
else if (offset > page->offset)
|
||||||
|
n = n->rb_right;
|
||||||
|
else
|
||||||
|
return page;
|
||||||
|
}
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static inline struct page * __rb_insert_page_cache(struct inode * inode,
|
||||||
|
unsigned long offset,
|
||||||
|
struct rb_node * node)
|
||||||
|
{
|
||||||
|
struct rb_node ** p = &inode->i_rb_page_cache.rb_node;
|
||||||
|
struct rb_node * parent = NULL;
|
||||||
|
struct page * page;
|
||||||
|
|
||||||
|
while (*p)
|
||||||
|
{
|
||||||
|
parent = *p;
|
||||||
|
page = rb_entry(parent, struct page, rb_page_cache);
|
||||||
|
|
||||||
|
if (offset < page->offset)
|
||||||
|
p = &(*p)->rb_left;
|
||||||
|
else if (offset > page->offset)
|
||||||
|
p = &(*p)->rb_right;
|
||||||
|
else
|
||||||
|
return page;
|
||||||
|
}
|
||||||
|
|
||||||
|
rb_link_node(node, parent, p);
|
||||||
|
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static inline struct page * rb_insert_page_cache(struct inode * inode,
|
||||||
|
unsigned long offset,
|
||||||
|
struct rb_node * node)
|
||||||
|
{
|
||||||
|
struct page * ret;
|
||||||
|
if ((ret = __rb_insert_page_cache(inode, offset, node)))
|
||||||
|
goto out;
|
||||||
|
rb_insert_color(node, &inode->i_rb_page_cache);
|
||||||
|
out:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
-----------------------------------------------------------------------
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _LINUX_RBTREE_H
|
||||||
|
#define _LINUX_RBTREE_H
|
||||||
|
|
||||||
|
#include <stddef.h>
|
||||||
|
|
||||||
|
/**
|
||||||
|
* container_of - cast a member of a structure out to the containing structure
|
||||||
|
* @ptr: the pointer to the member.
|
||||||
|
* @type: the type of the container struct this is embedded in.
|
||||||
|
* @member: the name of the member within the struct.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
#define container_of(ptr, type, member) ({ \
|
||||||
|
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
|
||||||
|
(type *)( (char *)__mptr - offsetof(type,member) );})
|
||||||
|
|
||||||
|
struct rb_node
|
||||||
|
{
|
||||||
|
unsigned long rb_parent_color;
|
||||||
|
#define RB_RED 0
|
||||||
|
#define RB_BLACK 1
|
||||||
|
struct rb_node *rb_right;
|
||||||
|
struct rb_node *rb_left;
|
||||||
|
} __attribute__((aligned(sizeof(long))));
|
||||||
|
/* The alignment might seem pointless, but allegedly CRIS needs it */
|
||||||
|
|
||||||
|
struct rb_root
|
||||||
|
{
|
||||||
|
struct rb_node *rb_node;
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
#define rb_parent(r) ((struct rb_node *)((r)->rb_parent_color & ~3))
|
||||||
|
#define rb_color(r) ((r)->rb_parent_color & 1)
|
||||||
|
#define rb_is_red(r) (!rb_color(r))
|
||||||
|
#define rb_is_black(r) rb_color(r)
|
||||||
|
#define rb_set_red(r) do { (r)->rb_parent_color &= ~1; } while (0)
|
||||||
|
#define rb_set_black(r) do { (r)->rb_parent_color |= 1; } while (0)
|
||||||
|
|
||||||
|
static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
|
||||||
|
{
|
||||||
|
rb->rb_parent_color = (rb->rb_parent_color & 3) | (unsigned long)p;
|
||||||
|
}
|
||||||
|
static inline void rb_set_color(struct rb_node *rb, int color)
|
||||||
|
{
|
||||||
|
rb->rb_parent_color = (rb->rb_parent_color & ~1) | color;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define RB_ROOT (struct rb_root) { NULL, }
|
||||||
|
#define rb_entry(ptr, type, member) container_of(ptr, type, member)
|
||||||
|
|
||||||
|
#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL)
|
||||||
|
#define RB_EMPTY_NODE(node) (rb_parent(node) == node)
|
||||||
|
#define RB_CLEAR_NODE(node) (rb_set_parent(node, node))
|
||||||
|
|
||||||
|
extern void rb_insert_color(struct rb_node *, struct rb_root *);
|
||||||
|
extern void rb_erase(struct rb_node *, struct rb_root *);
|
||||||
|
|
||||||
|
/* Find logical next and previous nodes in a tree */
|
||||||
|
extern struct rb_node *rb_next(const struct rb_node *);
|
||||||
|
extern struct rb_node *rb_prev(const struct rb_node *);
|
||||||
|
extern struct rb_node *rb_first(const struct rb_root *);
|
||||||
|
extern struct rb_node *rb_last(const struct rb_root *);
|
||||||
|
|
||||||
|
/* Fast replacement of a single node without remove/rebalance/add/rebalance */
|
||||||
|
extern void rb_replace_node(struct rb_node *victim, struct rb_node *new,
|
||||||
|
struct rb_root *root);
|
||||||
|
|
||||||
|
static inline void rb_link_node(struct rb_node * node, struct rb_node * parent,
|
||||||
|
struct rb_node ** rb_link)
|
||||||
|
{
|
||||||
|
node->rb_parent_color = (unsigned long )parent;
|
||||||
|
node->rb_left = node->rb_right = NULL;
|
||||||
|
|
||||||
|
*rb_link = node;
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* _LINUX_RBTREE_H */
|
|
@ -108,6 +108,7 @@ rm -rf %{buildroot}
|
||||||
%{_includedir}/dwarves/dutil.h
|
%{_includedir}/dwarves/dutil.h
|
||||||
%{_includedir}/dwarves/gobuffer.h
|
%{_includedir}/dwarves/gobuffer.h
|
||||||
%{_includedir}/dwarves/list.h
|
%{_includedir}/dwarves/list.h
|
||||||
|
%{_includedir}/dwarves/rbtree.h
|
||||||
%{_includedir}/dwarves/strings.h
|
%{_includedir}/dwarves/strings.h
|
||||||
%{_libdir}/%{libname}.so
|
%{_libdir}/%{libname}.so
|
||||||
%{_libdir}/%{libname}_emit.so
|
%{_libdir}/%{libname}_emit.so
|
||||||
|
|
Loading…
Reference in New Issue