summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--debuggerd/tombstone.cpp78
-rw-r--r--include/backtrace/Backtrace.h72
-rw-r--r--include/backtrace/BacktraceMap.h72
-rw-r--r--include/backtrace/backtrace.h131
-rw-r--r--include/backtrace/backtrace_constants.h30
-rw-r--r--include/utils/CallStack.h2
-rw-r--r--libbacktrace/Android.mk4
-rw-r--r--libbacktrace/Backtrace.cpp208
-rw-r--r--libbacktrace/Backtrace.h18
-rw-r--r--libbacktrace/BacktraceMap.cpp130
-rw-r--r--libbacktrace/BacktraceThread.cpp26
-rw-r--r--libbacktrace/BacktraceThread.h6
-rw-r--r--libbacktrace/Corkscrew.cpp150
-rw-r--r--libbacktrace/Corkscrew.h20
-rw-r--r--libbacktrace/UnwindCurrent.cpp49
-rw-r--r--libbacktrace/UnwindCurrent.h2
-rw-r--r--libbacktrace/UnwindPtrace.cpp40
-rw-r--r--libbacktrace/UnwindPtrace.h2
-rw-r--r--libbacktrace/backtrace_test.cpp95
-rw-r--r--libbacktrace/map_info.c173
20 files changed, 602 insertions, 706 deletions
diff --git a/debuggerd/tombstone.cpp b/debuggerd/tombstone.cpp
index 9c5d8c0..acb6ed6 100644
--- a/debuggerd/tombstone.cpp
+++ b/debuggerd/tombstone.cpp
@@ -33,6 +33,7 @@
#include <cutils/properties.h>
#include <backtrace/Backtrace.h>
+#include <backtrace/BacktraceMap.h>
#include <sys/socket.h>
#include <linux/un.h>
@@ -230,9 +231,12 @@ static void dump_stack_segment(
break;
}
- const char* map_name = backtrace->GetMapName(stack_content, NULL);
- if (!map_name) {
+ const backtrace_map_t* map = backtrace->FindMap(stack_content);
+ const char* map_name;
+ if (!map) {
map_name = "";
+ } else {
+ map_name = map->name.c_str();
}
uintptr_t offset = 0;
std::string func_name(backtrace->GetFunctionName(stack_content, &offset));
@@ -328,17 +332,17 @@ static void dump_backtrace_and_stack(Backtrace* backtrace, log_t* log, int scope
}
}
-static void dump_map(log_t* log, const backtrace_map_info_t* m, const char* what, int scope_flags) {
- if (m != NULL) {
- _LOG(log, scope_flags, " %08x-%08x %c%c%c %s\n", m->start, m->end,
- m->is_readable ? 'r' : '-', m->is_writable ? 'w' : '-',
- m->is_executable ? 'x' : '-', m->name);
+static void dump_map(log_t* log, const backtrace_map_t* map, const char* what, int scope_flags) {
+ if (map != NULL) {
+ _LOG(log, scope_flags, " %08x-%08x %c%c%c %s\n", map->start, map->end,
+ (map->flags & PROT_READ) ? 'r' : '-', (map->flags & PROT_WRITE) ? 'w' : '-',
+ (map->flags & PROT_EXEC) ? 'x' : '-', map->name.c_str());
} else {
_LOG(log, scope_flags, " (no %s)\n", what);
}
}
-static void dump_nearby_maps(const backtrace_map_info_t* map_info_list, log_t* log, pid_t tid, int scope_flags) {
+static void dump_nearby_maps(BacktraceMap* map, log_t* log, pid_t tid, int scope_flags) {
scope_flags |= SCOPE_SENSITIVE;
siginfo_t si;
memset(&si, 0, sizeof(si));
@@ -350,7 +354,7 @@ static void dump_nearby_maps(const backtrace_map_info_t* map_info_list, log_t* l
return;
}
- uintptr_t addr = (uintptr_t) si.si_addr;
+ uintptr_t addr = reinterpret_cast<uintptr_t>(si.si_addr);
addr &= ~0xfff; // round to 4K page boundary
if (addr == 0) { // null-pointer deref
return;
@@ -361,29 +365,26 @@ static void dump_nearby_maps(const backtrace_map_info_t* map_info_list, log_t* l
// Search for a match, or for a hole where the match would be. The list
// is backward from the file content, so it starts at high addresses.
- const backtrace_map_info_t* map = map_info_list;
- const backtrace_map_info_t* next = NULL;
- const backtrace_map_info_t* prev = NULL;
- while (map != NULL) {
- if (addr >= map->start && addr < map->end) {
- next = map->next;
- break;
- } else if (addr >= map->end) {
- // map would be between "prev" and this entry
- next = map;
- map = NULL;
+ const backtrace_map_t* cur_map = NULL;
+ const backtrace_map_t* next_map = NULL;
+ const backtrace_map_t* prev_map = NULL;
+ for (BacktraceMap::const_iterator it = map->begin(); it != map->end(); ++it) {
+ if (addr >= it->start && addr < it->end) {
+ cur_map = &*it;
+ if (it != map->begin()) {
+ prev_map = &*(it-1);
+ }
+ if (++it != map->end()) {
+ next_map = &*it;
+ }
break;
}
-
- prev = map;
- map = map->next;
}
- // Show "next" then "match" then "prev" so that the addresses appear in
- // ascending order (like /proc/pid/maps).
- dump_map(log, next, "map below", scope_flags);
- dump_map(log, map, "map for address", scope_flags);
- dump_map(log, prev, "map above", scope_flags);
+ // Show the map address in ascending order (like /proc/pid/maps).
+ dump_map(log, prev_map, "map below", scope_flags);
+ dump_map(log, cur_map, "map for address", scope_flags);
+ dump_map(log, next_map, "map above", scope_flags);
}
static void dump_thread(
@@ -394,13 +395,13 @@ static void dump_thread(
dump_backtrace_and_stack(backtrace, log, scope_flags);
if (IS_AT_FAULT(scope_flags)) {
dump_memory_and_code(log, backtrace->Tid(), scope_flags);
- dump_nearby_maps(backtrace->GetMapList(), log, backtrace->Tid(), scope_flags);
+ dump_nearby_maps(backtrace->GetMap(), log, backtrace->Tid(), scope_flags);
}
}
// Return true if some thread is not detached cleanly
static bool dump_sibling_thread_report(
- log_t* log, pid_t pid, pid_t tid, int* total_sleep_time_usec, backtrace_map_info_t* map_info) {
+ log_t* log, pid_t pid, pid_t tid, int* total_sleep_time_usec, BacktraceMap* map) {
char task_path[64];
snprintf(task_path, sizeof(task_path), "/proc/%d/task", pid);
@@ -434,7 +435,7 @@ static bool dump_sibling_thread_report(
_LOG(log, 0, "--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---\n");
dump_thread_info(log, pid, new_tid, 0);
- UniquePtr<Backtrace> backtrace(Backtrace::Create(pid, new_tid, map_info));
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(pid, new_tid, map));
if (backtrace->Unwind(0)) {
dump_thread(backtrace.get(), log, 0, total_sleep_time_usec);
}
@@ -637,11 +638,12 @@ static bool dump_crash(log_t* log, pid_t pid, pid_t tid, int signal, uintptr_t a
dump_fault_addr(log, tid, signal);
}
- // Gather the map info once for all this process' threads.
- backtrace_map_info_t* map_info = backtrace_create_map_info_list(pid);
-
- UniquePtr<Backtrace> backtrace(Backtrace::Create(pid, tid, map_info));
+ BacktraceMap* map = NULL;
+ UniquePtr<Backtrace> backtrace(Backtrace::Create(pid, tid));
if (backtrace->Unwind(0)) {
+ // Grab the map that was created and share it with the siblings.
+ map = backtrace->TakeMapOwnership();
+
dump_abort_message(backtrace.get(), log, abort_msg_address);
dump_thread(backtrace.get(), log, SCOPE_AT_FAULT, total_sleep_time_usec);
}
@@ -652,11 +654,11 @@ static bool dump_crash(log_t* log, pid_t pid, pid_t tid, int signal, uintptr_t a
bool detach_failed = false;
if (dump_sibling_threads) {
- detach_failed = dump_sibling_thread_report(log, pid, tid, total_sleep_time_usec, map_info);
+ detach_failed = dump_sibling_thread_report(log, pid, tid, total_sleep_time_usec, map);
}
- // Destroy the previously created map info.
- backtrace_destroy_map_info_list(map_info);
+ // Destroy the BacktraceMap object.
+ delete map;
if (want_logs) {
dump_logs(log, pid, false);
diff --git a/include/backtrace/Backtrace.h b/include/backtrace/Backtrace.h
index df40b87..f0fb0cd 100644
--- a/include/backtrace/Backtrace.h
+++ b/include/backtrace/Backtrace.h
@@ -17,10 +17,25 @@
#ifndef _BACKTRACE_BACKTRACE_H
#define _BACKTRACE_BACKTRACE_H
-#include <backtrace/backtrace.h>
+#include <stdint.h>
#include <string>
+#include <vector>
+
+#include <backtrace/backtrace_constants.h>
+#include <backtrace/BacktraceMap.h>
+
+struct backtrace_frame_data_t {
+ size_t num; // The current fame number.
+ uintptr_t pc; // The absolute pc.
+ uintptr_t sp; // The top of the stack.
+ size_t stack_size; // The size of the stack, zero indicate an unknown stack size.
+ const backtrace_map_t* map; // The map associated with the given pc.
+ std::string func_name; // The function name associated with this pc, NULL if not found.
+ uintptr_t func_offset; // pc relative to the start of the function, only valid if func_name is not NULL.
+};
+// Forward declarations.
class BacktraceImpl;
class Backtrace {
@@ -33,9 +48,9 @@ public:
// If pid >= 0 and tid < 0, then the Backtrace object corresponds to a
// different process.
// Tracing a thread in a different process is not supported.
- // If map_info is NULL, then create the map and manage it internally.
- // If map_info is not NULL, the map is still owned by the caller.
- static Backtrace* Create(pid_t pid, pid_t tid, backtrace_map_info_t* map_info = NULL);
+ // If map is NULL, then create the map and manage it internally.
+ // If map is not NULL, the map is still owned by the caller.
+ static Backtrace* Create(pid_t pid, pid_t tid, BacktraceMap* map = NULL);
virtual ~Backtrace();
@@ -46,13 +61,12 @@ public:
// If the string is empty, then no valid function name was found.
virtual std::string GetFunctionName(uintptr_t pc, uintptr_t* offset);
- // Get the name of the map associated with the given pc. If NULL is returned,
- // then map_start is not set. Otherwise, map_start is the beginning of this
- // map.
- virtual const char* GetMapName(uintptr_t pc, uintptr_t* map_start);
+ // Find the map associated with the given pc.
+ virtual const backtrace_map_t* FindMap(uintptr_t pc);
- // Finds the memory map associated with the given ptr.
- virtual const backtrace_map_info_t* FindMapInfo(uintptr_t ptr);
+ // Take ownership of the BacktraceMap object associated with the backtrace.
+ // If this is called, the caller must handle deleting the object themselves.
+ virtual BacktraceMap* TakeMapOwnership();
// Read the data at a specific address.
virtual bool ReadWord(uintptr_t ptr, uint32_t* out_value) = 0;
@@ -62,35 +76,43 @@ public:
virtual std::string FormatFrameData(size_t frame_num);
virtual std::string FormatFrameData(const backtrace_frame_data_t* frame);
- pid_t Pid() { return backtrace_.pid; }
- pid_t Tid() { return backtrace_.tid; }
- size_t NumFrames() { return backtrace_.num_frames; }
-
- const backtrace_t* GetBacktrace() { return &backtrace_; }
+ pid_t Pid() { return pid_; }
+ pid_t Tid() { return tid_; }
+ size_t NumFrames() { return frames_.size(); }
const backtrace_frame_data_t* GetFrame(size_t frame_num) {
- if (frame_num > NumFrames()) {
+ if (frame_num >= frames_.size()) {
return NULL;
}
- return &backtrace_.frames[frame_num];
+ return &frames_[frame_num];
}
- const backtrace_map_info_t* GetMapList() {
- return map_info_;
- }
+ typedef std::vector<backtrace_frame_data_t>::iterator iterator;
+ iterator begin() { return frames_.begin(); }
+ iterator end() { return frames_.end(); }
+
+ typedef std::vector<backtrace_frame_data_t>::const_iterator const_iterator;
+ const_iterator begin() const { return frames_.begin(); }
+ const_iterator end() const { return frames_.end(); }
+
+ BacktraceMap* GetMap() { return map_; }
protected:
- Backtrace(BacktraceImpl* impl, pid_t pid, backtrace_map_info_t* map_info);
+ Backtrace(BacktraceImpl* impl, pid_t pid, BacktraceMap* map);
virtual bool VerifyReadWordArgs(uintptr_t ptr, uint32_t* out_value);
- BacktraceImpl* impl_;
+ bool BuildMap();
- backtrace_map_info_t* map_info_;
+ pid_t pid_;
+ pid_t tid_;
- bool map_info_requires_delete_;
+ BacktraceMap* map_;
+ bool map_shared_;
- backtrace_t backtrace_;
+ std::vector<backtrace_frame_data_t> frames_;
+
+ BacktraceImpl* impl_;
friend class BacktraceImpl;
};
diff --git a/include/backtrace/BacktraceMap.h b/include/backtrace/BacktraceMap.h
new file mode 100644
index 0000000..e5389c1
--- /dev/null
+++ b/include/backtrace/BacktraceMap.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _BACKTRACE_BACKTRACE_MAP_H
+#define _BACKTRACE_BACKTRACE_MAP_H
+
+#include <stdint.h>
+#include <sys/mman.h>
+
+#include <string>
+#include <vector>
+
+struct backtrace_map_t {
+ uintptr_t start;
+ uintptr_t end;
+ int flags;
+ std::string name;
+};
+
+class BacktraceMap {
+public:
+ BacktraceMap(pid_t pid);
+ virtual ~BacktraceMap();
+
+ // Get the map data structure for the given address.
+ const backtrace_map_t* Find(uintptr_t addr);
+
+ // The flags returned are the same flags as used by the mmap call.
+ // The values are PROT_*.
+ int GetFlags(uintptr_t pc) {
+ const backtrace_map_t* map = Find(pc);
+ if (map) {
+ return map->flags;
+ }
+ return PROT_NONE;
+ }
+
+ bool IsReadable(uintptr_t pc) { return GetFlags(pc) & PROT_READ; }
+ bool IsWritable(uintptr_t pc) { return GetFlags(pc) & PROT_WRITE; }
+ bool IsExecutable(uintptr_t pc) { return GetFlags(pc) & PROT_EXEC; }
+
+ typedef std::vector<backtrace_map_t>::iterator iterator;
+ iterator begin() { return maps_.begin(); }
+ iterator end() { return maps_.end(); }
+
+ typedef std::vector<backtrace_map_t>::const_iterator const_iterator;
+ const_iterator begin() const { return maps_.begin(); }
+ const_iterator end() const { return maps_.end(); }
+
+ virtual bool Build();
+
+protected:
+ virtual bool ParseLine(const char* line, backtrace_map_t* map);
+
+ std::vector<backtrace_map_t> maps_;
+ pid_t pid_;
+};
+
+#endif // _BACKTRACE_BACKTRACE_MAP_H
diff --git a/include/backtrace/backtrace.h b/include/backtrace/backtrace.h
deleted file mode 100644
index cfcbf0f..0000000
--- a/include/backtrace/backtrace.h
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef _BACKTRACE_H
-#define _BACKTRACE_H
-
-#include <stdint.h>
-#include <stdbool.h>
-#include <sys/types.h>
-
-__BEGIN_DECLS
-
-// When the pid to be traced is set to this value, then trace the current
-// process. If the tid value is not BACKTRACE_NO_TID, then the specified
-// thread from the current process will be traced.
-#define BACKTRACE_CURRENT_PROCESS -1
-// When the tid to be traced is set to this value, then trace the specified
-// current thread of the specified pid.
-#define BACKTRACE_CURRENT_THREAD -1
-
-#define MAX_BACKTRACE_FRAMES 64
-
-typedef struct backtrace_map_info {
- struct backtrace_map_info* next;
- uintptr_t start;
- uintptr_t end;
- bool is_readable;
- bool is_writable;
- bool is_executable;
- char name[];
-} backtrace_map_info_t;
-
-typedef struct {
- size_t num; /* The current fame number. */
- uintptr_t pc; /* The absolute pc. */
- uintptr_t sp; /* The top of the stack. */
- size_t stack_size; /* The size of the stack, zero indicate an unknown stack size. */
- const char* map_name; /* The name of the map to which this pc belongs, NULL indicates the pc doesn't belong to a known map. */
- uintptr_t map_offset; /* pc relative to the start of the map, only valid if map_name is not NULL. */
- char* func_name; /* The function name associated with this pc, NULL if not found. */
- uintptr_t func_offset; /* pc relative to the start of the function, only valid if func_name is not NULL. */
-} backtrace_frame_data_t;
-
-typedef struct {
- backtrace_frame_data_t frames[MAX_BACKTRACE_FRAMES];
- size_t num_frames;
-
- pid_t pid;
- pid_t tid;
- backtrace_map_info_t* map_info_list;
-} backtrace_t;
-
-typedef struct {
- void* data;
- const backtrace_t* backtrace;
-} backtrace_context_t;
-
-/* Create a context for the backtrace data and gather the backtrace.
- * If pid < 0, then gather the backtrace for the current process.
- */
-bool backtrace_create_context(
- backtrace_context_t* context, pid_t pid, pid_t tid, size_t num_ignore_frames);
-
-/* The same as backtrace_create_context, except that it is assumed that
- * the pid map has already been acquired and the caller will handle freeing
- * the map data.
- */
-bool backtrace_create_context_with_map(
- backtrace_context_t* context, pid_t pid, pid_t tid, size_t num_ignore_frames,
- backtrace_map_info_t* map_info);
-
-/* Gather the backtrace data for a pthread instead of a process. */
-bool backtrace_create_thread_context(
- backtrace_context_t* context, pid_t tid, size_t num_ignore_frames);
-
-/* Free any memory allocated during the context create. */
-void backtrace_destroy_context(backtrace_context_t* context);
-
-/* Read data at a specific address for a process. */
-bool backtrace_read_word(
- const backtrace_context_t* context, uintptr_t ptr, uint32_t* value);
-
-/* Get information about the map name associated with a pc. If NULL is
- * returned, then map_start is not set.
- */
-const char* backtrace_get_map_name(
- const backtrace_context_t* context, uintptr_t pc, uintptr_t* map_start);
-
-/* Get the function name and offset given the pc. If NULL is returned,
- * then func_offset is not set. The returned string is allocated using
- * malloc and must be freed by the caller.
- */
-char* backtrace_get_func_name(
- const backtrace_context_t* context, uintptr_t pc, uintptr_t* func_offset);
-
-/* Loads memory map from /proc/<pid>/maps. If pid < 0, then load the memory
- * map for the current process.
- */
-backtrace_map_info_t* backtrace_create_map_info_list(pid_t pid);
-
-/* Frees memory associated with the map list. */
-void backtrace_destroy_map_info_list(backtrace_map_info_t* map_info_list);
-
-/* Finds the memory map that contains the specified pc. */
-const backtrace_map_info_t* backtrace_find_map_info(
- const backtrace_map_info_t* map_info_list, uintptr_t pc);
-
-/* Create a formatted line of backtrace information for a single frame. */
-void backtrace_format_frame_data(
- const backtrace_context_t* context, size_t frame_num, char* buf,
- size_t buf_size);
-
-/* Get the backtrace data structure associated with the context. */
-const backtrace_t* backtrace_get_data(backtrace_context_t* context);
-
-__END_DECLS
-
-#endif /* _BACKTRACE_H */
diff --git a/include/backtrace/backtrace_constants.h b/include/backtrace/backtrace_constants.h
new file mode 100644
index 0000000..f8c1575
--- /dev/null
+++ b/include/backtrace/backtrace_constants.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _BACKTRACE_BACKTRACE_CONSTANTS_H
+#define _BACKTRACE_BACKTRACE_CONSTANTS_H
+
+// When the pid to be traced is set to this value, then trace the current
+// process. If the tid value is not BACKTRACE_NO_TID, then the specified
+// thread from the current process will be traced.
+#define BACKTRACE_CURRENT_PROCESS -1
+// When the tid to be traced is set to this value, then trace the specified
+// current thread of the specified pid.
+#define BACKTRACE_CURRENT_THREAD -1
+
+#define MAX_BACKTRACE_FRAMES 64
+
+#endif // _BACKTRACE_BACKTRACE_CONSTANTS_H
diff --git a/include/utils/CallStack.h b/include/utils/CallStack.h
index bfe2ddb..27e89f4 100644
--- a/include/utils/CallStack.h
+++ b/include/utils/CallStack.h
@@ -18,7 +18,7 @@
#define ANDROID_CALLSTACK_H
#include <android/log.h>
-#include <backtrace/backtrace.h>
+#include <backtrace/backtrace_constants.h>
#include <utils/String8.h>
#include <utils/Vector.h>
diff --git a/libbacktrace/Android.mk b/libbacktrace/Android.mk
index d2fd79e..d729c1c 100644
--- a/libbacktrace/Android.mk
+++ b/libbacktrace/Android.mk
@@ -2,8 +2,8 @@ LOCAL_PATH:= $(call my-dir)
common_src := \
Backtrace.cpp \
+ BacktraceMap.cpp \
BacktraceThread.cpp \
- map_info.c \
thread_utils.c \
common_cflags := \
@@ -222,7 +222,7 @@ LOCAL_LDLIBS += \
else
LOCAL_SRC_FILES += \
- map_info.c \
+ BacktraceMap.cpp \
endif
diff --git a/libbacktrace/Backtrace.cpp b/libbacktrace/Backtrace.cpp
index 20667e0..d7b40ab 100644
--- a/libbacktrace/Backtrace.cpp
+++ b/libbacktrace/Backtrace.cpp
@@ -27,46 +27,28 @@
#include <string>
#include <backtrace/Backtrace.h>
-#include <cutils/log.h>
+#include <backtrace/BacktraceMap.h>
#include "Backtrace.h"
#include "thread_utils.h"
//-------------------------------------------------------------------------
-// BacktraceImpl functions.
-//-------------------------------------------------------------------------
-backtrace_t* BacktraceImpl::GetBacktraceData() {
- return &backtrace_obj_->backtrace_;
-}
-
-//-------------------------------------------------------------------------
// Backtrace functions.
//-------------------------------------------------------------------------
-Backtrace::Backtrace(BacktraceImpl* impl, pid_t pid, backtrace_map_info_t* map_info)
- : impl_(impl), map_info_(map_info), map_info_requires_delete_(false) {
+Backtrace::Backtrace(BacktraceImpl* impl, pid_t pid, BacktraceMap* map)
+ : pid_(pid), tid_(-1), map_(map), map_shared_(true), impl_(impl) {
impl_->SetParent(this);
- backtrace_.num_frames = 0;
- backtrace_.pid = pid;
- backtrace_.tid = -1;
- if (map_info_ == NULL) {
- // Create the map and manage it internally.
- map_info_ = backtrace_create_map_info_list(pid);
- map_info_requires_delete_ = true;
+ if (map_ == NULL) {
+ // The map will be created when needed.
+ map_shared_ = false;
}
}
Backtrace::~Backtrace() {
- for (size_t i = 0; i < NumFrames(); i++) {
- if (backtrace_.frames[i].func_name) {
- free(backtrace_.frames[i].func_name);
- backtrace_.frames[i].func_name = NULL;
- }
- }
-
- if (map_info_ && map_info_requires_delete_) {
- backtrace_destroy_map_info_list(map_info_);
- map_info_ = NULL;
+ if (map_ && !map_shared_) {
+ delete map_;
+ map_ = NULL;
}
if (impl_) {
@@ -109,47 +91,36 @@ bool Backtrace::VerifyReadWordArgs(uintptr_t ptr, uint32_t* out_value) {
return true;
}
-const char* Backtrace::GetMapName(uintptr_t pc, uintptr_t* map_start) {
- const backtrace_map_info_t* map_info = FindMapInfo(pc);
- if (map_info) {
- if (map_start) {
- *map_start = map_info->start;
- }
- return map_info->name;
- }
- return NULL;
-}
-
-const backtrace_map_info_t* Backtrace::FindMapInfo(uintptr_t ptr) {
- return backtrace_find_map_info(map_info_, ptr);
-}
-
std::string Backtrace::FormatFrameData(size_t frame_num) {
- return FormatFrameData(&backtrace_.frames[frame_num]);
+ if (frame_num >= frames_.size()) {
+ return "";
+ }
+ return FormatFrameData(&frames_[frame_num]);
}
std::string Backtrace::FormatFrameData(const backtrace_frame_data_t* frame) {
const char* map_name;
- if (frame->map_name) {
- map_name = frame->map_name;
+ if (frame->map && !frame->map->name.empty()) {
+ map_name = frame->map->name.c_str();
} else {
map_name = "<unknown>";
}
+
uintptr_t relative_pc;
- if (frame->map_offset) {
- relative_pc = frame->map_offset;
+ if (frame->map) {
+ relative_pc = frame->pc - frame->map->start;
} else {
relative_pc = frame->pc;
}
char buf[512];
- if (frame->func_name && frame->func_offset) {
+ if (!frame->func_name.empty() && frame->func_offset) {
snprintf(buf, sizeof(buf), "#%02zu pc %0*" PRIxPTR " %s (%s+%" PRIuPTR ")",
frame->num, (int)sizeof(uintptr_t)*2, relative_pc, map_name,
- frame->func_name, frame->func_offset);
- } else if (frame->func_name) {
+ frame->func_name.c_str(), frame->func_offset);
+ } else if (!frame->func_name.empty()) {
snprintf(buf, sizeof(buf), "#%02zu pc %0*" PRIxPTR " %s (%s)", frame->num,
- (int)sizeof(uintptr_t)*2, relative_pc, map_name, frame->func_name);
+ (int)sizeof(uintptr_t)*2, relative_pc, map_name, frame->func_name.c_str());
} else {
snprintf(buf, sizeof(buf), "#%02zu pc %0*" PRIxPTR " %s", frame->num,
(int)sizeof(uintptr_t)*2, relative_pc, map_name);
@@ -158,13 +129,35 @@ std::string Backtrace::FormatFrameData(const backtrace_frame_data_t* frame) {
return buf;
}
+bool Backtrace::BuildMap() {
+ map_ = impl_->CreateBacktraceMap(pid_);
+ if (!map_->Build()) {
+ BACK_LOGW("Failed to build map for process %d", pid_);
+ return false;
+ }
+ return true;
+}
+
+const backtrace_map_t* Backtrace::FindMap(uintptr_t pc) {
+ if (map_ == NULL) {
+ // Lazy eval, time to build the map.
+ if (!BuildMap()) {
+ return NULL;
+ }
+ }
+ return map_->Find(pc);
+}
+
+BacktraceMap* Backtrace::TakeMapOwnership() {
+ map_shared_ = true;
+ return map_;
+}
+
//-------------------------------------------------------------------------
// BacktraceCurrent functions.
//-------------------------------------------------------------------------
BacktraceCurrent::BacktraceCurrent(
- BacktraceImpl* impl, backtrace_map_info_t *map_info) : Backtrace(impl, getpid(), map_info) {
-
- backtrace_.pid = getpid();
+ BacktraceImpl* impl, BacktraceMap* map) : Backtrace(impl, getpid(), map) {
}
BacktraceCurrent::~BacktraceCurrent() {
@@ -175,8 +168,8 @@ bool BacktraceCurrent::ReadWord(uintptr_t ptr, uint32_t* out_value) {
return false;
}
- const backtrace_map_info_t* map_info = FindMapInfo(ptr);
- if (map_info && map_info->is_readable) {
+ const backtrace_map_t* map = FindMap(ptr);
+ if (map && map->flags & PROT_READ) {
*out_value = *reinterpret_cast<uint32_t*>(ptr);
return true;
} else {
@@ -190,9 +183,9 @@ bool BacktraceCurrent::ReadWord(uintptr_t ptr, uint32_t* out_value) {
// BacktracePtrace functions.
//-------------------------------------------------------------------------
BacktracePtrace::BacktracePtrace(
- BacktraceImpl* impl, pid_t pid, pid_t tid, backtrace_map_info_t* map_info)
- : Backtrace(impl, pid, map_info) {
- backtrace_.tid = tid;
+ BacktraceImpl* impl, pid_t pid, pid_t tid, BacktraceMap* map)
+ : Backtrace(impl, pid, map) {
+ tid_ = tid;
}
BacktracePtrace::~BacktracePtrace() {
@@ -220,103 +213,16 @@ bool BacktracePtrace::ReadWord(uintptr_t ptr, uint32_t* out_value) {
#endif
}
-Backtrace* Backtrace::Create(pid_t pid, pid_t tid, backtrace_map_info_t* map_info) {
+Backtrace* Backtrace::Create(pid_t pid, pid_t tid, BacktraceMap* map) {
if (pid == BACKTRACE_CURRENT_PROCESS || pid == getpid()) {
if (tid == BACKTRACE_CURRENT_THREAD || tid == gettid()) {
- return CreateCurrentObj(map_info);
+ return CreateCurrentObj(map);
} else {
- return CreateThreadObj(tid, map_info);
+ return CreateThreadObj(tid, map);
}
} else if (tid == BACKTRACE_CURRENT_THREAD) {
- return CreatePtraceObj(pid, pid, map_info);
+ return CreatePtraceObj(pid, pid, map);
} else {
- return CreatePtraceObj(pid, tid, map_info);
- }
-}
-
-//-------------------------------------------------------------------------
-// Common interface functions.
-//-------------------------------------------------------------------------
-bool backtrace_create_context_with_map(
- backtrace_context_t* context, pid_t pid, pid_t tid, size_t num_ignore_frames,
- backtrace_map_info_t* map_info) {
- Backtrace* backtrace = Backtrace::Create(pid, tid, map_info);
- if (!backtrace) {
- return false;
- }
- if (!backtrace->Unwind(num_ignore_frames)) {
- delete backtrace;
- return false;
- }
-
- context->data = backtrace;
- context->backtrace = backtrace->GetBacktrace();
- return true;
-}
-
-bool backtrace_create_context(
- backtrace_context_t* context, pid_t pid, pid_t tid, size_t num_ignore_frames) {
- return backtrace_create_context_with_map(context, pid, tid, num_ignore_frames, NULL);
-}
-
-
-void backtrace_destroy_context(backtrace_context_t* context) {
- if (context->data) {
- Backtrace* backtrace = reinterpret_cast<Backtrace*>(context->data);
- delete backtrace;
- context->data = NULL;
- }
- context->backtrace = NULL;
-}
-
-const backtrace_t* backtrace_get_data(backtrace_context_t* context) {
- if (context && context->data) {
- Backtrace* backtrace = reinterpret_cast<Backtrace*>(context->data);
- return backtrace->GetBacktrace();
- }
- return NULL;
-}
-
-bool backtrace_read_word(const backtrace_context_t* context, uintptr_t ptr, uint32_t* value) {
- if (context->data) {
- Backtrace* backtrace = reinterpret_cast<Backtrace*>(context->data);
- return backtrace->ReadWord(ptr, value);
- }
- return true;
-}
-
-const char* backtrace_get_map_name(const backtrace_context_t* context, uintptr_t pc, uintptr_t* map_start) {
- if (context->data) {
- Backtrace* backtrace = reinterpret_cast<Backtrace*>(context->data);
- return backtrace->GetMapName(pc, map_start);
- }
- return NULL;
-}
-
-char* backtrace_get_func_name(const backtrace_context_t* context, uintptr_t pc, uintptr_t* func_offset) {
- if (context->data) {
- Backtrace* backtrace = reinterpret_cast<Backtrace*>(context->data);
- std::string func_name = backtrace->GetFunctionName(pc, func_offset);
- if (!func_name.empty()) {
- return strdup(func_name.c_str());
- }
- }
- return NULL;
-}
-
-void backtrace_format_frame_data(
- const backtrace_context_t* context, size_t frame_num, char* buf,
- size_t buf_size) {
- if (buf_size == 0 || buf == NULL) {
- BACK_LOGW("bad call buf %p buf_size %zu", buf, buf_size);
- } else if (context->data) {
- Backtrace* backtrace = reinterpret_cast<Backtrace*>(context->data);
- std::string line = backtrace->FormatFrameData(frame_num);
- if (line.size() > buf_size) {
- memcpy(buf, line.c_str(), buf_size-1);
- buf[buf_size] = '\0';
- } else {
- memcpy(buf, line.c_str(), line.size()+1);
- }
+ return CreatePtraceObj(pid, tid, map);
}
}
diff --git a/libbacktrace/Backtrace.h b/libbacktrace/Backtrace.h
index d741ef1..31fcaf2 100644
--- a/libbacktrace/Backtrace.h
+++ b/libbacktrace/Backtrace.h
@@ -18,8 +18,10 @@
#define _LIBBACKTRACE_BACKTRACE_H
#include <backtrace/Backtrace.h>
+#include <backtrace/BacktraceMap.h>
#include <sys/types.h>
+#include <log/log.h>
// Macro to log the function name along with the warning message.
#define BACK_LOGW(format, ...) \
@@ -37,15 +39,19 @@ public:
void SetParent(Backtrace* backtrace) { backtrace_obj_ = backtrace; }
+ virtual BacktraceMap* CreateBacktraceMap(pid_t pid) = 0;
+
protected:
- backtrace_t* GetBacktraceData();
+ inline std::vector<backtrace_frame_data_t>* GetFrames() { return &backtrace_obj_->frames_; }
+
+ inline bool BuildMap() { return backtrace_obj_->BuildMap(); }
Backtrace* backtrace_obj_;
};
class BacktraceCurrent : public Backtrace {
public:
- BacktraceCurrent(BacktraceImpl* impl, backtrace_map_info_t* map_info);
+ BacktraceCurrent(BacktraceImpl* impl, BacktraceMap* map);
virtual ~BacktraceCurrent();
bool ReadWord(uintptr_t ptr, uint32_t* out_value);
@@ -53,14 +59,14 @@ public:
class BacktracePtrace : public Backtrace {
public:
- BacktracePtrace(BacktraceImpl* impl, pid_t pid, pid_t tid, backtrace_map_info_t* map_info);
+ BacktracePtrace(BacktraceImpl* impl, pid_t pid, pid_t tid, BacktraceMap* map);
virtual ~BacktracePtrace();
bool ReadWord(uintptr_t ptr, uint32_t* out_value);
};
-Backtrace* CreateCurrentObj(backtrace_map_info_t* map_info);
-Backtrace* CreatePtraceObj(pid_t pid, pid_t tid, backtrace_map_info_t* map_info);
-Backtrace* CreateThreadObj(pid_t tid, backtrace_map_info_t* map_info);
+Backtrace* CreateCurrentObj(BacktraceMap* map);
+Backtrace* CreatePtraceObj(pid_t pid, pid_t tid, BacktraceMap* map);
+Backtrace* CreateThreadObj(pid_t tid, BacktraceMap* map);
#endif // _LIBBACKTRACE_BACKTRACE_H
diff --git a/libbacktrace/BacktraceMap.cpp b/libbacktrace/BacktraceMap.cpp
new file mode 100644
index 0000000..b3b4300
--- /dev/null
+++ b/libbacktrace/BacktraceMap.cpp
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <ctype.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
+
+#include <backtrace/BacktraceMap.h>
+#include <log/log.h>
+
+BacktraceMap::BacktraceMap(pid_t pid) : pid_(pid) {
+ if (pid_ < 0) {
+ pid_ = getpid();
+ }
+}
+
+BacktraceMap::~BacktraceMap() {
+}
+
+const backtrace_map_t* BacktraceMap::Find(uintptr_t addr) {
+ for (BacktraceMap::const_iterator it = begin();
+ it != end(); ++it) {
+ if (addr >= it->start && addr < it->end) {
+ return &*it;
+ }
+ }
+ return NULL;
+}
+
+bool BacktraceMap::ParseLine(const char* line, backtrace_map_t* map) {
+ unsigned long int start;
+ unsigned long int end;
+ char permissions[5];
+ int name_pos;
+
+#if defined(__APPLE__)
+// Mac OS vmmap(1) output:
+// __TEXT 0009f000-000a1000 [ 8K 8K] r-x/rwx SM=COW /Volumes/android/dalvik-dev/out/host/darwin-x86/bin/libcorkscrew_test\n
+// 012345678901234567890123456789012345678901234567890123456789
+// 0 1 2 3 4 5
+ if (sscanf(line, "%*21c %lx-%lx [%*13c] %3c/%*3c SM=%*3c %n",
+ &start, &end, permissions, &name_pos) != 3) {
+#else
+// Linux /proc/<pid>/maps lines:
+// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so\n
+// 012345678901234567890123456789012345678901234567890123456789
+// 0 1 2 3 4 5
+ if (sscanf(line, "%lx-%lx %4s %*x %*x:%*x %*d%n",
+ &start, &end, permissions, &name_pos) != 3) {
+#endif
+ return false;
+ }
+
+ map->start = start;
+ map->end = end;
+ map->flags = PROT_NONE;
+ if (permissions[0] == 'r') {
+ map->flags |= PROT_READ;
+ }
+ if (permissions[1] == 'w') {
+ map->flags |= PROT_WRITE;
+ }
+ if (permissions[2] == 'x') {
+ map->flags |= PROT_EXEC;
+ }
+
+ while (isspace(line[name_pos])) {
+ name_pos += 1;
+ }
+ map->name = line+name_pos;
+ if (!map->name.empty() && map->name[map->name.length()-1] == '\n') {
+ map->name.erase(map->name.length()-1);
+ }
+
+ ALOGV("Parsed map: start=%p, end=%p, flags=%x, name=%s",
+ map->start, map->end, map->flags, map->name.c_str());
+ return true;
+}
+
+bool BacktraceMap::Build() {
+#if defined(__APPLE__)
+ char cmd[sizeof(pid_t)*3 + sizeof("vmmap -w -resident -submap -allSplitLibs -interleaved ") + 1];
+#else
+ char path[sizeof(pid_t)*3 + sizeof("/proc//maps") + 1];
+#endif
+ char line[1024];
+
+#if defined(__APPLE__)
+ // cmd is guaranteed to always be big enough to hold this string.
+ sprintf(cmd, "vmmap -w -resident -submap -allSplitLibs -interleaved %d", pid);
+ FILE* fp = popen(cmd, "r");
+#else
+ // path is guaranteed to always be big enough to hold this string.
+ sprintf(path, "/proc/%d/maps", pid_);
+ FILE* fp = fopen(path, "r");
+#endif
+ if (fp == NULL) {
+ return false;
+ }
+
+ while(fgets(line, sizeof(line), fp)) {
+ backtrace_map_t map;
+ if (ParseLine(line, &map)) {
+ maps_.push_back(map);
+ }
+ }
+#if defined(__APPLE__)
+ pclose(fp);
+#else
+ fclose(fp);
+#endif
+
+ return true;
+}
diff --git a/libbacktrace/BacktraceThread.cpp b/libbacktrace/BacktraceThread.cpp
index 70616b0..9953dc1 100644
--- a/libbacktrace/BacktraceThread.cpp
+++ b/libbacktrace/BacktraceThread.cpp
@@ -22,7 +22,6 @@
#include <sys/types.h>
#include <cutils/atomic.h>
-#include <cutils/log.h>
#include "BacktraceThread.h"
#include "thread_utils.h"
@@ -115,30 +114,21 @@ static void SignalHandler(int n __attribute__((unused)), siginfo_t* siginfo,
BacktraceThread::BacktraceThread(
BacktraceImpl* impl, BacktraceThreadInterface* thread_intf, pid_t tid,
- backtrace_map_info_t* map_info)
- : BacktraceCurrent(impl, map_info), thread_intf_(thread_intf) {
- backtrace_.tid = tid;
+ BacktraceMap* map)
+ : BacktraceCurrent(impl, map), thread_intf_(thread_intf) {
+ tid_ = tid;
}
BacktraceThread::~BacktraceThread() {
}
void BacktraceThread::FinishUnwind() {
- for (size_t i = 0; i < NumFrames(); i++) {
- backtrace_frame_data_t* frame = &backtrace_.frames[i];
-
- frame->map_offset = 0;
- uintptr_t map_start;
- frame->map_name = GetMapName(frame->pc, &map_start);
- if (frame->map_name) {
- frame->map_offset = frame->pc - map_start;
- }
+ for (std::vector<backtrace_frame_data_t>::iterator it = frames_.begin();
+ it != frames_.end(); ++it) {
+ it->map = FindMap(it->pc);
- frame->func_offset = 0;
- std::string func_name = GetFunctionName(frame->pc, &frame->func_offset);
- if (!func_name.empty()) {
- frame->func_name = strdup(func_name.c_str());
- }
+ it->func_offset = 0;
+ it->func_name = GetFunctionName(it->pc, &it->func_offset);
}
}
diff --git a/libbacktrace/BacktraceThread.h b/libbacktrace/BacktraceThread.h
index a4b6ecb..cae496a 100644
--- a/libbacktrace/BacktraceThread.h
+++ b/libbacktrace/BacktraceThread.h
@@ -22,12 +22,12 @@
#include "Backtrace.h"
-typedef enum {
+enum state_e {
STATE_WAITING = 0,
STATE_DUMPING,
STATE_DONE,
STATE_CANCEL,
-} state_e;
+};
class BacktraceThreadInterface;
@@ -71,7 +71,7 @@ public:
// subclass both.
BacktraceThread(
BacktraceImpl* impl, BacktraceThreadInterface* thread_intf, pid_t tid,
- backtrace_map_info_t* map_info);
+ BacktraceMap* map);
virtual ~BacktraceThread();
virtual bool Unwind(size_t num_ignore_frames);
diff --git a/libbacktrace/Corkscrew.cpp b/libbacktrace/Corkscrew.cpp
index 63b8c7c..fd31a26 100644
--- a/libbacktrace/Corkscrew.cpp
+++ b/libbacktrace/Corkscrew.cpp
@@ -16,12 +16,11 @@
#define LOG_TAG "libbacktrace"
-#include <backtrace/backtrace.h>
+#include <backtrace/Backtrace.h>
#include <string.h>
#include <backtrace-arch.h>
-#include <cutils/log.h>
#include <corkscrew/backtrace.h>
#ifndef __USE_GNU
@@ -32,6 +31,48 @@
#include "Corkscrew.h"
//-------------------------------------------------------------------------
+// CorkscrewMap functions.
+//-------------------------------------------------------------------------
+CorkscrewMap::CorkscrewMap(pid_t pid) : BacktraceMap(pid), map_info_(NULL) {
+}
+
+CorkscrewMap::~CorkscrewMap() {
+ if (map_info_) {
+ free_map_info_list(map_info_);
+ map_info_ = NULL;
+ }
+}
+
+bool CorkscrewMap::Build() {
+ map_info_ = load_map_info_list(pid_);
+
+ // Use the information in map_info_ to construct the BacktraceMap data
+ // rather than reparsing /proc/self/maps.
+ map_info_t* cur_map = map_info_;
+ while (cur_map) {
+ backtrace_map_t map;
+ map.start = cur_map->start;
+ map.end = cur_map->end;
+ map.flags = 0;
+ if (cur_map->is_readable) {
+ map.flags |= PROT_READ;
+ }
+ if (cur_map->is_writable) {
+ map.flags |= PROT_WRITE;
+ }
+ if (cur_map->is_executable) {
+ map.flags |= PROT_EXEC;
+ }
+ map.name = cur_map->name;
+
+ maps_.push_back(map);
+
+ cur_map = cur_map->next;
+ }
+ return map_info_ != NULL;
+}
+
+//-------------------------------------------------------------------------
// CorkscrewCommon functions.
//-------------------------------------------------------------------------
bool CorkscrewCommon::GenerateFrameData(
@@ -41,29 +82,19 @@ bool CorkscrewCommon::GenerateFrameData(
return false;
}
- backtrace_t* data = GetBacktraceData();
- data->num_frames = num_frames;
- for (size_t i = 0; i < data->num_frames; i++) {
- backtrace_frame_data_t* frame = &data->frames[i];
- frame->num = i;
- frame->pc = cork_frames[i].absolute_pc;
- frame->sp = cork_frames[i].stack_top;
- frame->stack_size = cork_frames[i].stack_size;
- frame->map_name = NULL;
- frame->map_offset = 0;
- frame->func_name = NULL;
- frame->func_offset = 0;
-
- uintptr_t map_start;
- frame->map_name = backtrace_obj_->GetMapName(frame->pc, &map_start);
- if (frame->map_name) {
- frame->map_offset = frame->pc - map_start;
- }
-
- std::string func_name = backtrace_obj_->GetFunctionName(frame->pc, &frame->func_offset);
- if (!func_name.empty()) {
- frame->func_name = strdup(func_name.c_str());
- }
+ std::vector<backtrace_frame_data_t>* frames = GetFrames();
+ frames->resize(num_frames);
+ size_t i = 0;
+ for (std::vector<backtrace_frame_data_t>::iterator it = frames->begin();
+ it != frames->end(); ++it, ++i) {
+ it->num = i;
+ it->pc = cork_frames[i].absolute_pc;
+ it->sp = cork_frames[i].stack_top;
+ it->stack_size = cork_frames[i].stack_size;
+ it->func_offset = 0;
+
+ it->map = backtrace_obj_->FindMap(it->pc);
+ it->func_name = backtrace_obj_->GetFunctionName(it->pc, &it->func_offset);
}
return true;
}
@@ -88,23 +119,23 @@ std::string CorkscrewCurrent::GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset
*offset = 0;
Dl_info info;
- const backtrace_map_info_t* map_info = backtrace_obj_->FindMapInfo(pc);
- if (map_info) {
+ const backtrace_map_t* map = backtrace_obj_->FindMap(pc);
+ if (map) {
if (dladdr((const void*)pc, &info)) {
if (info.dli_sname) {
- *offset = pc - map_info->start - (uintptr_t)info.dli_saddr + (uintptr_t)info.dli_fbase;
+ *offset = pc - map->start - (uintptr_t)info.dli_saddr + (uintptr_t)info.dli_fbase;
return info.dli_sname;
}
} else {
// dladdr(3) didn't find a symbol; maybe it's static? Look in the ELF file...
- symbol_table_t* symbol_table = load_symbol_table(map_info->name);
+ symbol_table_t* symbol_table = load_symbol_table(map->name.c_str());
if (symbol_table) {
// First check if we can find the symbol using a relative pc.
std::string name;
- const symbol_t* elf_symbol = find_symbol(symbol_table, pc - map_info->start);
+ const symbol_t* elf_symbol = find_symbol(symbol_table, pc - map->start);
if (elf_symbol) {
name = elf_symbol->name;
- *offset = pc - map_info->start - elf_symbol->start;
+ *offset = pc - map->start - elf_symbol->start;
} else if ((elf_symbol = find_symbol(symbol_table, pc)) != NULL) {
// Found the symbol using the absolute pc.
name = elf_symbol->name;
@@ -125,39 +156,36 @@ CorkscrewThread::CorkscrewThread() {
}
CorkscrewThread::~CorkscrewThread() {
- if (corkscrew_map_info_) {
- free_map_info_list(corkscrew_map_info_);
- corkscrew_map_info_ = NULL;
- }
}
bool CorkscrewThread::Init() {
- corkscrew_map_info_ = load_map_info_list(backtrace_obj_->Pid());
- return corkscrew_map_info_ != NULL;
+ if (backtrace_obj_->GetMap() == NULL) {
+ // Trigger the map object creation, which will create the corkscrew
+ // map information.
+ return BuildMap();
+ }
+ return true;
}
void CorkscrewThread::ThreadUnwind(
siginfo_t* siginfo, void* sigcontext, size_t num_ignore_frames) {
- backtrace_frame_t frames[MAX_BACKTRACE_FRAMES];
+ backtrace_frame_t cork_frames[MAX_BACKTRACE_FRAMES];
+ CorkscrewMap* map = static_cast<CorkscrewMap*>(backtrace_obj_->GetMap());
ssize_t num_frames = unwind_backtrace_signal_arch(
- siginfo, sigcontext, corkscrew_map_info_, frames, num_ignore_frames,
- MAX_BACKTRACE_FRAMES);
+ siginfo, sigcontext, map->GetMapInfo(), cork_frames,
+ num_ignore_frames, MAX_BACKTRACE_FRAMES);
if (num_frames > 0) {
- backtrace_t* data = GetBacktraceData();
- data->num_frames = num_frames;
- for (size_t i = 0; i < data->num_frames; i++) {
- backtrace_frame_data_t* frame = &data->frames[i];
- frame->num = i;
- frame->pc = frames[i].absolute_pc;
- frame->sp = frames[i].stack_top;
- frame->stack_size = frames[i].stack_size;
-
- frame->map_offset = 0;
- frame->map_name = NULL;
- frame->map_offset = 0;
-
- frame->func_offset = 0;
- frame->func_name = NULL;
+ std::vector<backtrace_frame_data_t>* frames = GetFrames();
+ frames->resize(num_frames);
+ size_t i = 0;
+ for (std::vector<backtrace_frame_data_t>::iterator it = frames->begin();
+ it != frames->end(); ++it, ++i) {
+ it->num = i;
+ it->pc = cork_frames[i].absolute_pc;
+ it->sp = cork_frames[i].stack_top;
+ it->stack_size = cork_frames[i].stack_size;
+ it->map = NULL;
+ it->func_offset = 0;
}
}
}
@@ -206,15 +234,15 @@ std::string CorkscrewPtrace::GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset)
//-------------------------------------------------------------------------
// C++ object creation functions.
//-------------------------------------------------------------------------
-Backtrace* CreateCurrentObj(backtrace_map_info_t* map_info) {
- return new BacktraceCurrent(new CorkscrewCurrent(), map_info);
+Backtrace* CreateCurrentObj(BacktraceMap* map) {
+ return new BacktraceCurrent(new CorkscrewCurrent(), map);
}
-Backtrace* CreatePtraceObj(pid_t pid, pid_t tid, backtrace_map_info_t* map_info) {
- return new BacktracePtrace(new CorkscrewPtrace(), pid, tid, map_info);
+Backtrace* CreatePtraceObj(pid_t pid, pid_t tid, BacktraceMap* map) {
+ return new BacktracePtrace(new CorkscrewPtrace(), pid, tid, map);
}
-Backtrace* CreateThreadObj(pid_t tid, backtrace_map_info_t* map_info) {
+Backtrace* CreateThreadObj(pid_t tid, BacktraceMap* map) {
CorkscrewThread* thread_obj = new CorkscrewThread();
- return new BacktraceThread(thread_obj, thread_obj, tid, map_info);
+ return new BacktraceThread(thread_obj, thread_obj, tid, map);
}
diff --git a/libbacktrace/Corkscrew.h b/libbacktrace/Corkscrew.h
index 7cb125c..229bb01 100644
--- a/libbacktrace/Corkscrew.h
+++ b/libbacktrace/Corkscrew.h
@@ -21,8 +21,8 @@
#include <string>
-#include <backtrace/backtrace.h>
#include <backtrace/Backtrace.h>
+#include <backtrace/BacktraceMap.h>
#include <corkscrew/backtrace.h>
@@ -32,6 +32,8 @@
class CorkscrewCommon : public BacktraceImpl {
public:
bool GenerateFrameData(backtrace_frame_t* cork_frames, ssize_t num_frames);
+
+ virtual BacktraceMap* CreateBacktraceMap(pid_t pid) { return new BacktraceMap(pid); }
};
class CorkscrewCurrent : public CorkscrewCommon {
@@ -44,6 +46,19 @@ public:
virtual std::string GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset);
};
+class CorkscrewMap : public BacktraceMap {
+public:
+ CorkscrewMap(pid_t pid);
+ virtual ~CorkscrewMap();
+
+ virtual bool Build();
+
+ map_info_t* GetMapInfo() { return map_info_; }
+
+private:
+ map_info_t* map_info_;
+};
+
class CorkscrewThread : public CorkscrewCurrent, public BacktraceThreadInterface {
public:
CorkscrewThread();
@@ -54,8 +69,7 @@ public:
virtual void ThreadUnwind(
siginfo_t* siginfo, void* sigcontext, size_t num_ignore_frames);
-private:
- map_info_t* corkscrew_map_info_;
+ virtual BacktraceMap* CreateBacktraceMap(pid_t pid) { return new CorkscrewMap(pid); }
};
class CorkscrewPtrace : public CorkscrewCommon {
diff --git a/libbacktrace/UnwindCurrent.cpp b/libbacktrace/UnwindCurrent.cpp
index 6cdbc42..747eb21 100644
--- a/libbacktrace/UnwindCurrent.cpp
+++ b/libbacktrace/UnwindCurrent.cpp
@@ -18,9 +18,8 @@
#include <sys/types.h>
-#include <cutils/log.h>
-
-#include <backtrace/backtrace.h>
+#include <backtrace/Backtrace.h>
+#include <backtrace/BacktraceMap.h>
#define UNW_LOCAL_ONLY
#include <libunwind.h>
@@ -79,9 +78,6 @@ std::string UnwindCurrent::GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset) {
}
bool UnwindCurrent::UnwindFromContext(size_t num_ignore_frames, bool resolve) {
- backtrace_t* backtrace = GetBacktraceData();
- backtrace->num_frames = 0;
-
// The cursor structure is pretty large, do not put it on the stack.
unw_cursor_t* cursor = new unw_cursor_t;
int ret = unw_init_local(cursor, &context_);
@@ -91,6 +87,9 @@ bool UnwindCurrent::UnwindFromContext(size_t num_ignore_frames, bool resolve) {
return false;
}
+ std::vector<backtrace_frame_data_t>* frames = GetFrames();
+ frames->reserve(MAX_BACKTRACE_FRAMES);
+ size_t num_frames = 0;
do {
unw_word_t pc;
ret = unw_get_reg(cursor, UNW_REG_IP, &pc);
@@ -106,42 +105,32 @@ bool UnwindCurrent::UnwindFromContext(size_t num_ignore_frames, bool resolve) {
}
if (num_ignore_frames == 0) {
- size_t num_frames = backtrace->num_frames;
- backtrace_frame_data_t* frame = &backtrace->frames[num_frames];
+ frames->resize(num_frames+1);
+ backtrace_frame_data_t* frame = &frames->at(num_frames);
frame->num = num_frames;
frame->pc = static_cast<uintptr_t>(pc);
frame->sp = static_cast<uintptr_t>(sp);
frame->stack_size = 0;
- frame->map_name = NULL;
- frame->map_offset = 0;
- frame->func_name = NULL;
- frame->func_offset = 0;
if (num_frames > 0) {
// Set the stack size for the previous frame.
- backtrace_frame_data_t* prev = &backtrace->frames[num_frames-1];
+ backtrace_frame_data_t* prev = &frames->at(num_frames-1);
prev->stack_size = frame->sp - prev->sp;
}
if (resolve) {
- std::string func_name = backtrace_obj_->GetFunctionName(frame->pc, &frame->func_offset);
- if (!func_name.empty()) {
- frame->func_name = strdup(func_name.c_str());
- }
-
- uintptr_t map_start;
- frame->map_name = backtrace_obj_->GetMapName(frame->pc, &map_start);
- if (frame->map_name) {
- frame->map_offset = frame->pc - map_start;
- }
+ frame->func_name = backtrace_obj_->GetFunctionName(frame->pc, &frame->func_offset);
+ frame->map = backtrace_obj_->FindMap(frame->pc);
+ } else {
+ frame->map = NULL;
+ frame->func_offset = 0;
}
-
- backtrace->num_frames++;
+ num_frames++;
} else {
num_ignore_frames--;
}
ret = unw_step (cursor);
- } while (ret > 0 && backtrace->num_frames < MAX_BACKTRACE_FRAMES);
+ } while (ret > 0 && num_frames < MAX_BACKTRACE_FRAMES);
delete cursor;
return true;
@@ -195,11 +184,11 @@ void UnwindThread::ThreadUnwind(
//-------------------------------------------------------------------------
// C++ object creation function.
//-------------------------------------------------------------------------
-Backtrace* CreateCurrentObj(backtrace_map_info_t* map_info) {
- return new BacktraceCurrent(new UnwindCurrent(), map_info);
+Backtrace* CreateCurrentObj(BacktraceMap* map) {
+ return new BacktraceCurrent(new UnwindCurrent(), map);
}
-Backtrace* CreateThreadObj(pid_t tid, backtrace_map_info_t* map_info) {
+Backtrace* CreateThreadObj(pid_t tid, BacktraceMap* map) {
UnwindThread* thread_obj = new UnwindThread();
- return new BacktraceThread(thread_obj, thread_obj, tid, map_info);
+ return new BacktraceThread(thread_obj, thread_obj, tid, map);
}
diff --git a/libbacktrace/UnwindCurrent.h b/libbacktrace/UnwindCurrent.h
index 7dc977d..8302c0b 100644
--- a/libbacktrace/UnwindCurrent.h
+++ b/libbacktrace/UnwindCurrent.h
@@ -38,6 +38,8 @@ public:
void ExtractContext(void* sigcontext);
+ virtual BacktraceMap* CreateBacktraceMap(pid_t pid) { return new BacktraceMap(pid); }
+
protected:
unw_context_t context_;
};
diff --git a/libbacktrace/UnwindPtrace.cpp b/libbacktrace/UnwindPtrace.cpp
index 6fecb76..e45c5f8 100644
--- a/libbacktrace/UnwindPtrace.cpp
+++ b/libbacktrace/UnwindPtrace.cpp
@@ -16,13 +16,12 @@
#define LOG_TAG "libbacktrace"
-#include <backtrace/backtrace.h>
+#include <backtrace/Backtrace.h>
+#include <backtrace/BacktraceMap.h>
#include <sys/types.h>
#include <string.h>
-#include <cutils/log.h>
-
#include <libunwind.h>
#include <libunwind-ptrace.h>
@@ -55,9 +54,6 @@ bool UnwindPtrace::Unwind(size_t num_ignore_frames) {
return false;
}
- backtrace_t* backtrace = GetBacktraceData();
- backtrace->num_frames = 0;
-
unw_cursor_t cursor;
int ret = unw_init_remote(&cursor, addr_space_, upt_info_);
if (ret < 0) {
@@ -65,6 +61,9 @@ bool UnwindPtrace::Unwind(size_t num_ignore_frames) {
return false;
}
+ std::vector<backtrace_frame_data_t>* frames = GetFrames();
+ frames->reserve(MAX_BACKTRACE_FRAMES);
+ size_t num_frames = 0;
do {
unw_word_t pc;
ret = unw_get_reg(&cursor, UNW_REG_IP, &pc);
@@ -80,39 +79,28 @@ bool UnwindPtrace::Unwind(size_t num_ignore_frames) {
}
if (num_ignore_frames == 0) {
- size_t num_frames = backtrace->num_frames;
- backtrace_frame_data_t* frame = &backtrace->frames[num_frames];
+ frames->resize(num_frames+1);
+ backtrace_frame_data_t* frame = &frames->at(num_frames);
frame->num = num_frames;
frame->pc = static_cast<uintptr_t>(pc);
frame->sp = static_cast<uintptr_t>(sp);
frame->stack_size = 0;
- frame->map_name = NULL;
- frame->map_offset = 0;
- frame->func_name = NULL;
- frame->func_offset = 0;
if (num_frames > 0) {
- backtrace_frame_data_t* prev = &backtrace->frames[num_frames-1];
+ backtrace_frame_data_t* prev = &frames->at(num_frames-1);
prev->stack_size = frame->sp - prev->sp;
}
- std::string func_name = backtrace_obj_->GetFunctionName(frame->pc, &frame->func_offset);
- if (!func_name.empty()) {
- frame->func_name = strdup(func_name.c_str());
- }
+ frame->func_name = backtrace_obj_->GetFunctionName(frame->pc, &frame->func_offset);
- uintptr_t map_start;
- frame->map_name = backtrace_obj_->GetMapName(frame->pc, &map_start);
- if (frame->map_name) {
- frame->map_offset = frame->pc - map_start;
- }
+ frame->map = backtrace_obj_->FindMap(frame->pc);
- backtrace->num_frames++;
+ num_frames++;
} else {
num_ignore_frames--;
}
ret = unw_step (&cursor);
- } while (ret > 0 && backtrace->num_frames < MAX_BACKTRACE_FRAMES);
+ } while (ret > 0 && num_frames < MAX_BACKTRACE_FRAMES);
return true;
}
@@ -132,6 +120,6 @@ std::string UnwindPtrace::GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset) {
//-------------------------------------------------------------------------
// C++ object creation function.
//-------------------------------------------------------------------------
-Backtrace* CreatePtraceObj(pid_t pid, pid_t tid, backtrace_map_info_t* map_info) {
- return new BacktracePtrace(new UnwindPtrace(), pid, tid, map_info);
+Backtrace* CreatePtraceObj(pid_t pid, pid_t tid, BacktraceMap* map) {
+ return new BacktracePtrace(new UnwindPtrace(), pid, tid, map);
}
diff --git a/libbacktrace/UnwindPtrace.h b/libbacktrace/UnwindPtrace.h
index 781405b..05375dd 100644
--- a/libbacktrace/UnwindPtrace.h
+++ b/libbacktrace/UnwindPtrace.h
@@ -32,6 +32,8 @@ public:
virtual std::string GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset);
+ virtual BacktraceMap* CreateBacktraceMap(pid_t pid) { return new BacktraceMap(pid); }
+
private:
unw_addr_space_t addr_space_;
struct UPT_info* upt_info_;
diff --git a/libbacktrace/backtrace_test.cpp b/libbacktrace/backtrace_test.cpp
index 2fed993..0ff7897 100644
--- a/libbacktrace/backtrace_test.cpp
+++ b/libbacktrace/backtrace_test.cpp
@@ -29,6 +29,7 @@
#include <unistd.h>
#include <backtrace/Backtrace.h>
+#include <backtrace/BacktraceMap.h>
#include <UniquePtr.h>
#include <cutils/atomic.h>
@@ -50,18 +51,18 @@
// Number of simultaneous threads running in our forked process.
#define NUM_PTRACE_THREADS 5
-typedef struct {
+struct thread_t {
pid_t tid;
int32_t state;
pthread_t threadId;
-} thread_t;
+};
-typedef struct {
+struct dump_thread_t {
thread_t thread;
Backtrace* backtrace;
int32_t* now;
int32_t done;
-} dump_thread_t;
+};
extern "C" {
// Prototypes for functions in the test library.
@@ -103,9 +104,8 @@ void WaitForStop(pid_t pid) {
bool ReadyLevelBacktrace(Backtrace* backtrace) {
// See if test_level_four is in the backtrace.
bool found = false;
- for (size_t i = 0; i < backtrace->NumFrames(); i++) {
- const backtrace_frame_data_t* frame = backtrace->GetFrame(i);
- if (frame->func_name != NULL && strcmp(frame->func_name, "test_level_four") == 0) {
+ for (Backtrace::const_iterator it = backtrace->begin(); it != backtrace->end(); ++it) {
+ if (it->func_name == "test_level_four") {
found = true;
break;
}
@@ -122,8 +122,7 @@ void VerifyLevelDump(Backtrace* backtrace) {
// frame we want.
size_t frame_num = 0;
for (size_t i = backtrace->NumFrames()-1; i > 2; i--) {
- if (backtrace->GetFrame(i)->func_name != NULL &&
- strcmp(backtrace->GetFrame(i)->func_name, "test_level_one") == 0) {
+ if (backtrace->GetFrame(i)->func_name == "test_level_one") {
frame_num = i;
break;
}
@@ -131,14 +130,10 @@ void VerifyLevelDump(Backtrace* backtrace) {
ASSERT_LT(static_cast<size_t>(0), frame_num);
ASSERT_LE(static_cast<size_t>(3), frame_num);
- ASSERT_TRUE(NULL != backtrace->GetFrame(frame_num)->func_name);
- ASSERT_STREQ(backtrace->GetFrame(frame_num)->func_name, "test_level_one");
- ASSERT_TRUE(NULL != backtrace->GetFrame(frame_num-1)->func_name);
- ASSERT_STREQ(backtrace->GetFrame(frame_num-1)->func_name, "test_level_two");
- ASSERT_TRUE(NULL != backtrace->GetFrame(frame_num-2)->func_name);
- ASSERT_STREQ(backtrace->GetFrame(frame_num-2)->func_name, "test_level_three");
- ASSERT_TRUE(NULL != backtrace->GetFrame(frame_num-3)->func_name);
- ASSERT_STREQ(backtrace->GetFrame(frame_num-3)->func_name, "test_level_four");
+ ASSERT_EQ(backtrace->GetFrame(frame_num)->func_name, "test_level_one");
+ ASSERT_EQ(backtrace->GetFrame(frame_num-1)->func_name, "test_level_two");
+ ASSERT_EQ(backtrace->GetFrame(frame_num-2)->func_name, "test_level_three");
+ ASSERT_EQ(backtrace->GetFrame(frame_num-3)->func_name, "test_level_four");
}
void VerifyLevelBacktrace(void*) {
@@ -157,9 +152,8 @@ bool ReadyMaxBacktrace(Backtrace* backtrace) {
void VerifyMaxDump(Backtrace* backtrace) {
ASSERT_EQ(backtrace->NumFrames(), static_cast<size_t>(MAX_BACKTRACE_FRAMES));
// Verify that the last frame is our recursive call.
- ASSERT_TRUE(NULL != backtrace->GetFrame(MAX_BACKTRACE_FRAMES-1)->func_name);
- ASSERT_STREQ(backtrace->GetFrame(MAX_BACKTRACE_FRAMES-1)->func_name,
- "test_recursive_call");
+ ASSERT_EQ(backtrace->GetFrame(MAX_BACKTRACE_FRAMES-1)->func_name,
+ "test_recursive_call");
}
void VerifyMaxBacktrace(void*) {
@@ -220,8 +214,7 @@ void VerifyIgnoreFrames(
EXPECT_EQ(bt_ign2->GetFrame(i)->sp, bt_all->GetFrame(i+2)->sp);
EXPECT_EQ(bt_ign2->GetFrame(i)->stack_size, bt_all->GetFrame(i+2)->stack_size);
}
- if (!check && bt_ign2->GetFrame(i)->func_name &&
- strcmp(bt_ign2->GetFrame(i)->func_name, cur_proc) == 0) {
+ if (!check && bt_ign2->GetFrame(i)->func_name == cur_proc) {
check = true;
}
}
@@ -598,38 +591,64 @@ TEST(libbacktrace, format_test) {
ASSERT_TRUE(backtrace.get() != NULL);
backtrace_frame_data_t frame;
- memset(&frame, 0, sizeof(backtrace_frame_data_t));
+ frame.num = 1;
+ frame.pc = 2;
+ frame.sp = 0;
+ frame.stack_size = 0;
+ frame.map = NULL;
+ frame.func_offset = 0;
+ backtrace_map_t map;
+ map.start = 0;
+ map.end = 0;
+
+ // Check no map set.
frame.num = 1;
#if defined(__LP64__)
- EXPECT_STREQ("#01 pc 0000000000000000 <unknown>",
+ EXPECT_EQ("#01 pc 0000000000000002 <unknown>",
+#else
+ EXPECT_EQ("#01 pc 00000002 <unknown>",
+#endif
+ backtrace->FormatFrameData(&frame));
+
+ // Check map name empty, but exists.
+ frame.map = &map;
+ map.start = 1;
+#if defined(__LP64__)
+ EXPECT_EQ("#01 pc 0000000000000001 <unknown>",
#else
- EXPECT_STREQ("#01 pc 00000000 <unknown>",
+ EXPECT_EQ("#01 pc 00000001 <unknown>",
#endif
- backtrace->FormatFrameData(&frame).c_str());
+ backtrace->FormatFrameData(&frame));
+
- frame.pc = 0x12345678;
- frame.map_name = "MapFake";
+ // Check relative pc is set and map name is set.
+ frame.pc = 0x12345679;
+ frame.map = &map;
+ map.name = "MapFake";
+ map.start = 1;
#if defined(__LP64__)
- EXPECT_STREQ("#01 pc 0000000012345678 MapFake",
+ EXPECT_EQ("#01 pc 0000000012345678 MapFake",
#else
- EXPECT_STREQ("#01 pc 12345678 MapFake",
+ EXPECT_EQ("#01 pc 12345678 MapFake",
#endif
- backtrace->FormatFrameData(&frame).c_str());
+ backtrace->FormatFrameData(&frame));
- frame.func_name = const_cast<char*>("ProcFake");
+ // Check func_name is set, but no func offset.
+ frame.func_name = "ProcFake";
#if defined(__LP64__)
- EXPECT_STREQ("#01 pc 0000000012345678 MapFake (ProcFake)",
+ EXPECT_EQ("#01 pc 0000000012345678 MapFake (ProcFake)",
#else
- EXPECT_STREQ("#01 pc 12345678 MapFake (ProcFake)",
+ EXPECT_EQ("#01 pc 12345678 MapFake (ProcFake)",
#endif
- backtrace->FormatFrameData(&frame).c_str());
+ backtrace->FormatFrameData(&frame));
+ // Check func_name is set, and func offset is non-zero.
frame.func_offset = 645;
#if defined(__LP64__)
- EXPECT_STREQ("#01 pc 0000000012345678 MapFake (ProcFake+645)",
+ EXPECT_EQ("#01 pc 0000000012345678 MapFake (ProcFake+645)",
#else
- EXPECT_STREQ("#01 pc 12345678 MapFake (ProcFake+645)",
+ EXPECT_EQ("#01 pc 12345678 MapFake (ProcFake+645)",
#endif
- backtrace->FormatFrameData(&frame).c_str());
+ backtrace->FormatFrameData(&frame));
}
diff --git a/libbacktrace/map_info.c b/libbacktrace/map_info.c
deleted file mode 100644
index 9cc6e01..0000000
--- a/libbacktrace/map_info.c
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <cutils/log.h>
-#include <sys/time.h>
-
-#include <backtrace/backtrace.h>
-
-#if defined(__APPLE__)
-
-// Mac OS vmmap(1) output:
-// __TEXT 0009f000-000a1000 [ 8K 8K] r-x/rwx SM=COW /Volumes/android/dalvik-dev/out/host/darwin-x86/bin/libcorkscrew_test\n
-// 012345678901234567890123456789012345678901234567890123456789
-// 0 1 2 3 4 5
-static backtrace_map_info_t* parse_vmmap_line(const char* line) {
- unsigned long int start;
- unsigned long int end;
- char permissions[4];
- int name_pos;
- if (sscanf(line, "%*21c %lx-%lx [%*13c] %3c/%*3c SM=%*3c %n",
- &start, &end, permissions, &name_pos) != 3) {
- return NULL;
- }
-
- const char* name = line + name_pos;
- size_t name_len = strlen(name);
-
- backtrace_map_info_t* mi = calloc(1, sizeof(backtrace_map_info_t) + name_len);
- if (mi != NULL) {
- mi->start = start;
- mi->end = end;
- mi->is_readable = permissions[0] == 'r';
- mi->is_writable = permissions[1] == 'w';
- mi->is_executable = permissions[2] == 'x';
- memcpy(mi->name, name, name_len);
- mi->name[name_len - 1] = '\0';
- ALOGV("Parsed map: start=0x%08x, end=0x%08x, "
- "is_readable=%d, is_writable=%d is_executable=%d, name=%s",
- mi->start, mi->end,
- mi->is_readable, mi->is_writable, mi->is_executable, mi->name);
- }
- return mi;
-}
-
-backtrace_map_info_t* backtrace_create_map_info_list(pid_t pid) {
- char cmd[1024];
- if (pid < 0) {
- pid = getpid();
- }
- snprintf(cmd, sizeof(cmd), "vmmap -w -resident -submap -allSplitLibs -interleaved %d", pid);
- FILE* fp = popen(cmd, "r");
- if (fp == NULL) {
- return NULL;
- }
-
- char line[1024];
- backtrace_map_info_t* milist = NULL;
- while (fgets(line, sizeof(line), fp) != NULL) {
- backtrace_map_info_t* mi = parse_vmmap_line(line);
- if (mi != NULL) {
- mi->next = milist;
- milist = mi;
- }
- }
- pclose(fp);
- return milist;
-}
-
-#else
-
-// Linux /proc/<pid>/maps lines:
-// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so\n
-// 012345678901234567890123456789012345678901234567890123456789
-// 0 1 2 3 4 5
-static backtrace_map_info_t* parse_maps_line(const char* line)
-{
- unsigned long int start;
- unsigned long int end;
- char permissions[5];
- int name_pos;
- if (sscanf(line, "%lx-%lx %4s %*x %*x:%*x %*d%n", &start, &end,
- permissions, &name_pos) != 3) {
- return NULL;
- }
-
- while (isspace(line[name_pos])) {
- name_pos += 1;
- }
- const char* name = line + name_pos;
- size_t name_len = strlen(name);
- if (name_len && name[name_len - 1] == '\n') {
- name_len -= 1;
- }
-
- backtrace_map_info_t* mi = calloc(1, sizeof(backtrace_map_info_t) + name_len + 1);
- if (mi) {
- mi->start = start;
- mi->end = end;
- mi->is_readable = strlen(permissions) == 4 && permissions[0] == 'r';
- mi->is_writable = strlen(permissions) == 4 && permissions[1] == 'w';
- mi->is_executable = strlen(permissions) == 4 && permissions[2] == 'x';
- memcpy(mi->name, name, name_len);
- mi->name[name_len] = '\0';
- ALOGV("Parsed map: start=0x%08x, end=0x%08x, "
- "is_readable=%d, is_writable=%d, is_executable=%d, name=%s",
- mi->start, mi->end,
- mi->is_readable, mi->is_writable, mi->is_executable, mi->name);
- }
- return mi;
-}
-
-backtrace_map_info_t* backtrace_create_map_info_list(pid_t tid) {
- char path[PATH_MAX];
- char line[1024];
- FILE* fp;
- backtrace_map_info_t* milist = NULL;
-
- if (tid < 0) {
- tid = getpid();
- }
- snprintf(path, PATH_MAX, "/proc/%d/maps", tid);
- fp = fopen(path, "r");
- if (fp) {
- while(fgets(line, sizeof(line), fp)) {
- backtrace_map_info_t* mi = parse_maps_line(line);
- if (mi) {
- mi->next = milist;
- milist = mi;
- }
- }
- fclose(fp);
- }
- return milist;
-}
-
-#endif
-
-void backtrace_destroy_map_info_list(backtrace_map_info_t* milist) {
- while (milist) {
- backtrace_map_info_t* next = milist->next;
- free(milist);
- milist = next;
- }
-}
-
-const backtrace_map_info_t* backtrace_find_map_info(
- const backtrace_map_info_t* milist, uintptr_t addr) {
- const backtrace_map_info_t* mi = milist;
- while (mi && !(addr >= mi->start && addr < mi->end)) {
- mi = mi->next;
- }
- return mi;
-}
generated by cgit v1.1 at 2024-09-14 12:09:39 +0000